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🎙️ Señors @ Scale

Software Engineering & Tech Leadership

🎧 Latest Episodes

Scaling Frontend at Perk with Giorgio Polvara | Monolith to Microfrontends, Vite, Zod
Episode 33 • 46m

Scaling Frontend at Perk with Giorgio Polvara | Monolith to Microfrontends, Vite, Zod

What does it actually take to scale a frontend from 15 people in a converted flat to a 1,800-person unicorn, and then migrate the whole thing to microfrontends without breaking anyone's week?In this episode, Dan sits down with Giorgio Polvara, Staff Engineer at Perk (formerly TravelPerk) and the original creator of @testing-library/user-event (1M+ weekly npm downloads). Giorgio joined TravelPerk as employee #15, set up the frontend foundations that still power the product today, left to try engineering management at Toptal, realized he missed building, and came back as Staff.They get into the microfrontend migration that replaced a monolithic React app with vertically-split single-page apps served at the infrastructure layer, the rebrand that changed the name, domain, logo, and colors simultaneously, and the philosophy that ties it all together: you're not building features, you're improving a system that happens to produce features.Key Topics:- Scaling a frontend team from 7 engineers to a full platform tribe- Why 20% refactoring time is the wrong model- Monolith to microfrontends: SingleSPA vs the vertical-split architecture they built- Managing shared dependencies with pnpm, Syncpack, and Vite plugin packages- Contract testing with Pact vs runtime schema validation with Zod- Rebranding an entire product behind a feature flag, without leaking the design- Why Giorgio tried engineering management and went back to IC- Staff engineer advice: propose five solutions, expect one to land🔗 FOLLOW GIORGIO💼 LinkedIn: https://www.linkedin.com/in/polvara🐙 GitHub: https://github.com/Gpx🌐 npm: https://www.npmjs.com/package/@testing-library/user-event🎙️ FOLLOW & SUBSCRIBE📸 Instagram: https://www.instagram.com/senorsatscale/📸 Instagram: https://www.instagram.com/neciudev🎙 Podcast URL: https://neciudan.dev/senors-at-scale📬 Newsletter: https://neciudan.dev/subscribe💼 LinkedIn: https://www.linkedin.com/in/neciudan💼 LinkedIn: https://www.linkedin.com/company/senors-scale/📚 ADDITIONAL RESOURCES- A Philosophy of Software Design by John Ousterhout- Out of the Tar Pit (Moseley & Marks)- No Silver Bullet (Fred Brooks)- @testing-library/user-event: https://www.npmjs.com/package/@testing-library/user-event- SingleSPA: https://single-spa.js.org- Vite: https://vitejs.dev- Pact (contract testing): https://pact.io- Zod: https://zod.dev#staffengineer #microfrontends #frontendarchitecture #perk #travelperk #reactjs #softwarearchitecture #engineeringleadership #devtools #softwaredesign #senorsatscale💬 How does your team handle the tension between shipping features and keeping the system healthy? Drop a comment 👇

April 19, 2026
Episode 32 49m April 12, 2026
Federated Systems at Scale with Zephyr Cloud | Module Federation, Edge Deploys, Reverse Tree Shaking

How do you deploy federated front ends to the edge in 150 milliseconds? In this episode, Zack Chapple, CEO and Co-founder of Zephyr Cloud, and Nestor Lopez, Platform Engineer at Zephyr Cloud, break down everything developers need to know about micro frontends, module federation, and deploying at global scale without the infrastructure pain.Zack's journey started at a consulting company working with enterprises like SAP to add module federation support to Angular, which eventually revealed all the pain points of scaling federated architectures. That led to Medusa, then to Zephyr Cloud, the platform he describes as "Kubernetes for the front end." Nestor's path started eight years ago with Sencha.js and iframes, long before module federation existed, and brought him to Zephyr through open source contributions to TRPC and other projects.We cover why module federation is "Docker for the front end," how Zephyr deploys with one line of code and no CI/CD pipeline, their reverse tree shaking technique that recomposes federated bundles into a monolith at the edge, how Nestor deployed 5,200+ micro frontends as a single video, their federated MCP server for enterprise AI orchestration, and a TC39 proposal to fix ESM module unloading in V8. We also talk about pricing, open source contributions, and what it's really like to build a startup with four kids.Whether you're an enterprise team trying to ship frontend independently across dozens of teams, or a solo developer who just wants to deploy without setting up a CI/CD pipeline, this conversation covers the full spectrum.Key Topics:- Micro frontends explained through the microservices and Kubernetes analogy- Module federation as "Docker for the front end" and Zephyr as the orchestration layer- End-to-end walkthrough: from bundler to global edge deploy in ~150ms- No repo required, Zephyr hooks into any bundler and deploys on build- Reverse tree shaking: monolith performance with micro frontend dev experience- The Chrome extension for hot-swapping MFEs in any environment- Federated MCP servers built on module federation for enterprise AI- TC39 proposal to fix ESM module unloading and enable live HMR on Node.js- Bring your own cloud: Cloudflare, AWS, Fastly- Pricing: free for solo, $19/seat for teams, org-wide for enterprise- Mobile support through Metro and desktop through Tauri- Open source contributions and financially supporting projects like RSPack, SWC, and Tailwind🔗 FOLLOW ZACK💼 LinkedIn: https://www.linkedin.com/in/zackarychapple/🐦 X/Twitter: https://x.com/Zackary_Chapple🐙 GitHub: https://github.com/zackarychapple🔗 FOLLOW NESTOR💼 LinkedIn: https://www.linkedin.com/in/nstlopez/🐦 X/Twitter: https://x.com/nstlopez🌐 Blog: https://nstlopez.com🎙️ FOLLOW & SUBSCRIBE📸 Instagram: https://www.instagram.com/senorsatscale/📸 Instagram: https://www.instagram.com/neciudev🎙 Podcast URL: https://neciudan.dev/senors-at-scale📬 Newsletter: https://neciudan.dev/subscribe💼 LinkedIn: https://www.linkedin.com/in/neciudan💼 LinkedIn: https://www.linkedin.com/company/senors-scale/📚 ADDITIONAL RESOURCES- Zephyr Cloud: https://zephyr-cloud.io- Module Federation: https://module-federation.io- RSPack: https://rspack.dev- Hono: https://hono.dev- shadcn/ui: https://ui.shadcn.com#MicroFrontends #ModuleFederation #ZephyrCloud #Frontend #WebDev #PlatformEngineering #DevEx #EdgeComputing #Kubernetes #SenorsAtScale #OpenSource #Startup💬 What's the most painful deployment workflow you've ever had to deal with? Share your stories in the comments!

Episode 31 1h 3m April 5, 2026
ServiceMesh at Scale with William Morgan, creator of Linkerd

William Morgan is the CEO of Buoyant and the creator of Linkerd, the world's first service mesh and a CNCF graduated project powering production Kubernetes infrastructure at thousands of companies. Before founding Buoyant, William spent nearly four years at Twitter as a software engineer and engineering manager, where he shipped core platform features like the Twitter photo service and embed timelines — and watched the legendary monolith-to-microservices transformation unfold firsthand.In this episode, we cover what it was like engineering at Twitter during the fail whale era, how decomposing a monolith introduces entirely new networking challenges, why William invented the term "service mesh," and how Linkerd gives platform teams reliability, security, and observability without developers having to think about it.Whether you're a platform engineer running Kubernetes in production, an SRE trying to make sense of service-to-service communication, or a developer curious about what infrastructure teams actually do — this conversation is packed with hard-won lessons from a decade of building critical open source infrastructure.🔸 Key Topics:- Engineering at Twitter in 2010: the Rails monolith, Scala rewrite, and microservices transformation- How replacing function calls with network calls changes everything- What a service mesh is and why the term had to be invented- Control plane vs data plane architecture- Why Linkerd rewrote its proxy from Scala/JVM to Rust- Latency-aware load balancing, mTLS, and protocol detection- Multi-cluster communication and mesh expansion to VMs- Common service mesh implementation mistakes- Linkerd vs Istio: William's honest take- Open source sustainability and enterprise monetization- The enterprise sales journey from engineer to CEO- Book recommendations: Hyperion, Gideon the Ninth, The Book of the New Sun🔗 FOLLOW WILLIAM💼 LinkedIn: https://www.linkedin.com/in/wmorgan/🐦 X/Twitter: https://x.com/wm🌐 Buoyant: https://buoyant.io🎙️ FOLLOW & SUBSCRIBE📸 Instagram: https://www.instagram.com/senorsatscale/📸 Instagram: https://www.instagram.com/neciudev🎙 Podcast URL: https://neciudan.dev/senors-at-scale📬 Newsletter: https://neciudan.dev/subscribe💼 LinkedIn: https://www.linkedin.com/in/neciudan💼 LinkedIn: https://www.linkedin.com/company/señors-scale/📚 ADDITIONAL RESOURCES- Linkerd: https://linkerd.io- Buoyant: https://buoyant.io- Linkerd Getting Started: https://docs.buoyant.io- Linkerd GitHub (Proxy): https://github.com/linkerd/linkerd2-proxy- Hyperion by Dan Simmons- Gideon the Ninth by Tamsyn Muir- The Book of the New Sun by Gene Wolfe- Simon Willison's Blog (AI/LLMs): https://simonwillison.net#Linkerd #ServiceMesh #Kubernetes #Rust #CloudNative #Buoyant #CNCF #Microservices #Infrastructure #PlatformEngineering #SoftwareEngineering #SenorsAtScale💬 What's the most complex networking issue you've debugged in a microservices environment? Share your war stories in the comments!

Episode 30 52m March 29, 2026
Databases at Scale with Tyler Benfield (Staff Engineer @ Prisma) | ORMs, Indexes, Connection Pooling & Scaling Postgres to Billions of Requests

You can never build anything faster than your slowest database query. In this episode, Tyler Benfield, Staff Software Engineer at Prisma, breaks down everything developers need to know about database performance, from why your queries are slow to how Prisma scales Postgres to handle billions of requests on bare metal infrastructure.Tyler's path into databases started at Penske Racing, writing trackside software for NASCAR pit stops, and eventually led him deep into query optimization, connection pooling, and building Prisma Postgres from the ground up. We cover the most common ORM anti-patterns, why indexes are the single biggest performance lever most developers ignore, how Prisma Accelerate turns database connections into HTTP calls, and why Tyler thinks the SQL query language itself is fundamentally broken for modern web apps.Whether you're a frontend developer afraid to touch the database or a backend engineer scaling past your first million users, this conversation is packed with practical, immediately actionable advice.🔸 Key Topics:- ORMs vs raw SQL vs query builders and when to use each- The most common Prisma anti-patterns that tank your app performance- How database indexes actually work (the address book analogy)- Connection pooling, serverless runtimes, and the problem Prisma Accelerate solves- Scaling Postgres on bare metal with memory snapshots and scale-to-zero- Per-query pricing and why Prisma charges differently than other providers- NoSQL vs SQL and when Postgres can handle both- Why SQL is a bad query language for nested relational data- The future of AI agents and databases, MCP servers, and ephemeral environments🔗 FOLLOW TYLER💼 LinkedIn: https://www.linkedin.com/in/tylerbenfield/🐦 X/Twitter: https://x.com/rtbenfield🦋 Bluesky: https://bsky.app/profile/rtbenfield.dev🌐 Website: https://tylerbenfield.me🎙️ FOLLOW & SUBSCRIBE📸 Instagram: https://www.instagram.com/senorsatscale/📸 Instagram: https://www.instagram.com/neciudev🎙 Podcast URL: https://neciudan.dev/senors-at-scale📬 Newsletter: https://neciudan.dev/subscribe💼 LinkedIn: https://www.linkedin.com/in/neciudan💼 LinkedIn: https://www.linkedin.com/company/señors-scale/📚 ADDITIONAL RESOURCES- Prisma ORM: https://www.prisma.io- Prisma Postgres: https://www.prisma.io/postgres- The Design of Everyday Things by Don Norman- The Design of Future Things by Don Norman- Designing Data-Intensive Applications by Martin Kleppmann- Aaron Francis (database education): https://aaronfrancis.com#Prisma #Postgres #DatabasePerformance #ORM #TypeScript #ServerlessDatabase #ConnectionPooling #SQLOptimization #WebDevelopment #SoftwareEngineering #FullStack #DatabaseIndexes #SenorsAtScale💬 What's the worst database performance issue you've ever debugged? Share your war stories in the comments!

Neciu Dan

Hosted by Neciu Dan

Tech Lead, Co-Founder, Speaker

What is Señors @ Scale?

A software engineering podcast for senior developers, staff engineers, and tech leads who build and scale systems in production. Hosted by Neciu Dan, Señors @ Scale features deep, technical conversations with engineering leaders from companies like Google, AWS, Microsoft, Cloudflare, Datadog, and Snyk.

Every week, we sit down with Staff Engineers, Principal Engineers, and technical leaders to unpack the real challenges of frontend architecture, micro frontends, React and Vue at scale, design systems, security, reliability, and technical leadership. No fluff, no surface-level takes. Just hard-won lessons from engineers shipping software to millions of users.

Topics we cover: scaling frontend and backend systems, micro frontend architecture, CSS and web performance, developer experience, engineering management, open source, distributed systems, CI/CD and deployment strategies, and the career path from senior engineer to staff and beyond.

Whether you're debugging production, leading a platform team, or figuring out your next career move in tech, this podcast is built for you.

Frequently Asked Questions

What is Señors @ Scale?

A software engineering podcast for senior developers, staff engineers, and tech leads who build and scale systems in production. Hosted by Neciu Dan, it features deep, technical conversations with engineering leaders from companies like Google, AWS, Microsoft, Cloudflare, Datadog, and Snyk. Topics include frontend and backend scaling, micro frontends, React and Vue at scale, design systems, security, reliability, and technical leadership.

How often are new episodes released?

New episodes are released regularly. Subscribe to the newsletter or follow on Spotify, Apple Podcasts, or YouTube to get notified when new episodes drop.

Where can I listen to Señors @ Scale?

You can listen on Spotify, Apple Podcasts, and YouTube. Written takeaways for each episode are published on this site at neciudan.dev/takeaways.

How can I get notified about new episodes and takeaways?

Use the subscription form on this page to get email updates when new episodes and key takeaways are published.

📻 Never Miss an Episode

Get notified when new episodes drop. Join our community of senior developers learning from real scaling stories.

What You'll Learn

📈 Scaling Applications

  • Checkmark Microservices vs monolith trade-offs
  • Checkmark Database scaling strategies
  • Checkmark Performance optimization techniques

👥 Scaling Teams

  • Checkmark Technical leadership strategies
  • Checkmark Building effective engineering culture
  • Checkmark Mentoring and career development

🎧 Listen on Your Favorite Platform

🎵 Latest Episode

Episode 33 • 46m

Scaling Frontend at Perk with Giorgio Polvara | Monolith to Microfrontends, Vite, Zod

Episode Description:

What does it actually take to scale a frontend from 15 people in a converted flat to a 1,800-person unicorn, and then migrate the whole thing to microfrontends without breaking anyone's week?In this episode, Dan sits down with Giorgio Polvara, Staff Engineer at Perk (formerly TravelPerk) and the original creator of @testing-library/user-event (1M+ weekly npm downloads). Giorgio joined TravelPerk as employee #15, set up the frontend foundations that still power the product today, left to try engineering management at Toptal, realized he missed building, and came back as Staff.They get into the microfrontend migration that replaced a monolithic React app with vertically-split single-page apps served at the infrastructure layer, the rebrand that changed the name, domain, logo, and colors simultaneously, and the philosophy that ties it all together: you're not building features, you're improving a system that happens to produce features.Key Topics:- Scaling a frontend team from 7 engineers to a full platform tribe- Why 20% refactoring time is the wrong model- Monolith to microfrontends: SingleSPA vs the vertical-split architecture they built- Managing shared dependencies with pnpm, Syncpack, and Vite plugin packages- Contract testing with Pact vs runtime schema validation with Zod- Rebranding an entire product behind a feature flag, without leaking the design- Why Giorgio tried engineering management and went back to IC- Staff engineer advice: propose five solutions, expect one to land🔗 FOLLOW GIORGIO💼 LinkedIn: https://www.linkedin.com/in/polvara🐙 GitHub: https://github.com/Gpx🌐 npm: https://www.npmjs.com/package/@testing-library/user-event🎙️ FOLLOW & SUBSCRIBE📸 Instagram: https://www.instagram.com/senorsatscale/📸 Instagram: https://www.instagram.com/neciudev🎙 Podcast URL: https://neciudan.dev/senors-at-scale📬 Newsletter: https://neciudan.dev/subscribe💼 LinkedIn: https://www.linkedin.com/in/neciudan💼 LinkedIn: https://www.linkedin.com/company/senors-scale/📚 ADDITIONAL RESOURCES- A Philosophy of Software Design by John Ousterhout- Out of the Tar Pit (Moseley & Marks)- No Silver Bullet (Fred Brooks)- @testing-library/user-event: https://www.npmjs.com/package/@testing-library/user-event- SingleSPA: https://single-spa.js.org- Vite: https://vitejs.dev- Pact (contract testing): https://pact.io- Zod: https://zod.dev#staffengineer #microfrontends #frontendarchitecture #perk #travelperk #reactjs #softwarearchitecture #engineeringleadership #devtools #softwaredesign #senorsatscale💬 How does your team handle the tension between shipping features and keeping the system healthy? Drop a comment 👇

"Deep conversations with senior developers about scaling applications, teams, and careers — real insights from industry veterans."

💡 Takeaways from Previous Episodes

Database Performance at Scale with Tyler Benfield
Episode 30
58 minutes

Señors @ Scale host Neciu Dan sits down with Tyler Benfield, Staff Software Engineer at Prisma, to go deep on database performance. Tyler's path into databases started at Penske Racing, writing trackside software for NASCAR pit stops, and eventually led him into query optimization, connection pooling, and building Prisma Postgres from scratch. From the most common ORM anti-patterns to scaling Postgres on bare metal with memory snapshots, this is the database conversation most frontend developers never get.

Open Source at Scale with Corbin Crutchley
Episode 29
52 minutes

Señors @ Scale host Neciu Dan sits down with Corbin Crutchley — lead maintainer of TanStack Form, Microsoft MVP, VP of Engineering, and author of a free book that teaches React, Angular, and Vue simultaneously — to dig into what it actually means to maintain a library that gets a million downloads a week. Corbin covers the origin of TanStack Form, why versioning is a social contract, what nearly made him quit open source, and the surprisingly non-technical path that got him into a VP role.

PostCSS, AutoPrefixer & Open Source at Scale with Andrey Sitnik
Episode 28
58 minutes

Señors @ Scale host Neciu Dan sits down with Andrey Sitnik — creator of PostCSS, AutoPrefixer, and Browserslist, and Lead Engineer at Evil Martians — to explore how one developer became responsible for 0.7% of all npm downloads. Andrey shares the discrimination story that drove AutoPrefixer, the open pledge that forced PostCSS 8 to ship, and why the Mythical Man-Month applies directly to LLM agent coordination.

React Server Components at Scale with Aurora Scharff
Episode 27
52 minutes

Señors @ Scale host Neciu Dan sits down with Aurora Scharff — Senior Consultant at Creon Consulting, Microsoft MVP in Web Technologies, and React Certifications Lead at certificates.dev — to explore the real mental model shift required to understand React Server Components. Aurora shares her path from Robotics to frontend, what it was like building a controller UI for Boston Dynamics' Spot robot dog in React, and why the ecosystem finally feels like it's stabilizing.

From Code to Community with Daniel Afonso
Episode 26
58 minutes

Señors @ Scale host Neciu Dan sits down with Daniel Afonso — Senior Developer Advocate at PagerDuty, SolidJS DX team member, egghead instructor, and organizer of the JNation conference in Coimbra — to explore how a kid who taught himself to navigate the web before he could read became one of the most active voices in the developer community. Daniel shares his origin story, how writing about every hard problem he faced at work became the skill that launched his career, and the one hidden tip every developer should use when joining a new codebase.

Scaling Teams and Leading Through Change with Lucian Popovici
Episode 25
55 minutes

Señors @ Scale host Neciu Dan sits down with Lucian Popovici — founder of Bridging Innovation and the free mentorship community Bridging Gaps, former Director at Deloitte Digital Romania where he scaled the team from 0 to 700, and veteran of Deutsche Bank and Ericsson — to talk about what actually happens when engineers become leaders, why the manager title is a trap for the ego-driven, and how AI is reshaping not just team sizes but entire industry models.

Leveling Up as a Tech Lead with Anamari Fisher
Episode 24
52 minutes

Señors @ Scale host Neciu Dan sits down with Anamari Fisher — engineering leader, coach, and O'Reilly author of 'Leveling Up as a Tech Lead' — to explore the first jump into leadership. Anamari shares how she went from software engineer to tech lead and product director, why accountability is the key differentiator from senior engineer, and how to scale your impact through soft skills that actually work in real teams.

MicroFrontends at Scale with Florian Rappl
Episode 23
69 minutes

Señors @ Scale host Neciu Dan sits down with Florian Rappl — author of 'The Art of Micro Frontends,' creator of the Piral framework, and Microsoft MVP — to explore how micro frontends are transforming how we build scalable web applications. Florian shares hard-won lessons from over a decade of building distributed systems, from smart home platforms to enterprise portals for some of Germany's largest companies.

Nuxt at Scale with Daniel Roe
Episode 22
54 minutes

Señors @ Scale host Neciu Dan sits down with Daniel Roe, leader of the Nuxt Core team at Vercel, for an in-depth conversation about building and scaling with Nuxt, Vue's most powerful meta-framework. Daniel shares his journey from the Laravel world into Vue and Nuxt, revealing how he went from being a user to becoming the lead maintainer of one of the most important frameworks in the JavaScript ecosystem.

State Management at Scale with Daishi Kato (Author of Zustand)
Episode 21
35 minutes

Señors @ Scale host Neciu Dan sits down with Daishi Kato, the author and maintainer of Zustand, Jotai, and Valtio — three of the most widely used state management libraries in modern React. Daishi has been building modern open source tools for nearly a decade, balancing simplicity with scalability. We dive deep into the philosophy behind each library, how they differ from Redux and MobX, the evolution of the atom concept, and Daishi's latest project: Waku, a framework built around React Server Components.

Domain Driven Design at Scale with Vlad Khononov (O'Reilly and Pearson Author)
Episode 20
56 minutes

Señors @ Scale host Neciu Dan sits down with Vlad Khononov, software architect, keynote speaker, and author of Learning Domain-Driven Design and Balancing Coupling in Software Design. Vlad has spent over two decades helping teams untangle legacy systems, rebuild failing architectures, and bring clarity to messy business domains. This conversation cuts through the hype around DDD and microservices, focusing on the mechanics of bounded contexts, coupling, business alignment, and architectural evolution.

Modern CSS at Scale with Bramus
Episode 19
53 minutes

Seniors @ Scale host Neciu Dan is joined by Bramus Van Damme, Chrome Developer Relations Engineer at Google. As a leading voice in CSS and Web UI, Bramus dives into the future of the web, breaking down the mechanics, performance, and cross-browser status of transformative new features like View Transitions, Scroll-Driven Animations, Anchor Positioning, and Custom CSS Functions. He offers a rare look into the inner workings of Chrome DevRel, the standardization process through the CSS Working Group, and how the multi-browser 'Interop' effort is accelerating web development.

Security at Scale – With Liran Tal (Snyk)
Episode 18
57 minutes

Señors @ Scale host Neciu Dan sits down with Liran Tal, Director of Developer Advocacy at Snyk and GitHub Star, to unpack NPM malware, maintainer compromise, MCP attacks, toxic flows, and why AI-generated code is statistically insecure without the right guardrails. Liran shares real incidents from the Node and open source ecosystem, how Snyk and tools like NPQ help developers build safer workflows, and why security at scale starts with developers, not firewalls.

Micro-Frontends at Scale (Part 2) – With Luca Mezzalira (AWS)
Episode 17
1 hour 10 minutes

Señors @ Scale host Neciu Dan sits down with Luca Mezzalira, Principal Serverless Specialist at AWS and author of *Building Micro-Frontends*, to unpack how he helped scale DAZN’s frontend from 2 developers to 500 engineers across 40 devices. Luca shares the origin of micro-frontends, how to build stable application shells, implement zero global state, use guardrails for bundle budgets, and manage migrations at scale through edge routing and team autonomy.

Design Systems at Scale – With Stefano Magni (Preply)
Episode 16
1 hour 4 minutes

Señors @ Scale host Neciu Dan sits down with Stefano Magni, Senior Front-End Engineer and Tech Lead at Preply, to unpack what it takes to build and measure a design system for a global learning platform. From managing technical debt and accessibility to driving a culture of public work and data-driven engineering, Stefano shares lessons from 15+ years in frontend development.

Reliability at Scale – With Bruno Paulino (N26)
Episode 15
1 hour 7 minutes

Señors @ Scale host Neciu Dan sits down with Bruno Paulino, Tech Lead at N26, to explore what reliability really means in FinTech. From server-driven UIs and CI/CD pipelines to AI-assisted customer support and strict compliance, Bruno shares how N26 balances speed, safety, and developer experience to keep millions of users online.

WebFragments at Scale – With Natalia Venditto & Igor Minar
Episode 14
1 hour 2 minutes

Señors @ Scale host Neciu Dan talks with Microsoft’s Natalia Venditto and Cloudflare’s Igor Minar about WebFragments — a new micro-frontend model that isolates JavaScript and DOM at the browser boundary, enables instant SSR through fragment piercing, and lets large teams ship independently without dependency lockstep.

Observability at Scale – With Erik Grijzen
Episode 13
1 hour

In this episode of Señors @ Scale, host Neciu Dan chats with Erik Grijzen — Principal Software Engineer at New Relic — about building one of the first large-scale micro-frontend architectures, the rise of observability, and what technical leadership looks like across dozens of teams.

Accessibility at Scale – With Kateryna Porchienova
Episode 12
40 minutes

In this episode of Señors @ Scale, host Neciu Dan chats with Kateryna Porchienova — Senior Engineering Manager at Buffer — about her programming journey, the craft of animation, and why accessibility should be treated as a foundation of good engineering, not an afterthought.

Rails at Scale – With Adrian Marin
Episode 11
70 minutes

In this episode of Señors @ Scale, host Neciu Dan chats with Adrian Marin — founder of AVO and host of FriendlyRB — about Rails productivity, the magic of Ruby, and how the community continues to evolve through creativity and connection.

Vue at Scale – With Andreas Panopoulos
Episode 10
62 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Andreas Panopoulos — Staff Software Engineer at Hack the Box and co-organizer of Vue.js Athens — to talk about scaling Vue in production, migrating to Nuxt 3, and the human side of engineering.

Frontend Architecture at Scale – With Faris Aziz
Episode 9
72 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Faris Aziz — Staff Front-End Engineer at Small PDF and co-founder of ZurichJS — to talk about scaling frontend systems, the power of BFF architecture, and the human side of engineering culture.

Organizing Conferences at Scale – With Aris
Episode 8
44 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Aris — founder and lead organizer of CityJS — to talk about building developer communities, organizing meetups, and scaling conferences into global events.

Open Source at Scale – With Erik Rasmussen
Episode 7
62 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Erik Rasmussen — creator of Redux Form and React Final Form, and now Principal Product Engineer at Attio — to talk about building open source at scale, developer experience, and the hidden lessons behind shipping tools other developers rely on.

Mentorship at Scale – With Eduardo Aparicio Cardenes
Episode 6
58 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Eduardo Aparicio Cardenes — Front-End Engineer and ADPList Top 100 Mentor — to unpack 15+ years of engineering lessons, the reality of promotions, and what it truly means to mentor and scale as a leader.

React at Scale – With Matheus Albuquerque
Episode 5
58 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Matheus Albuquerque — Staff Frontend Engineer at Medallia, Google Developer Expert, and international speaker — to dive deep into React internals, performance optimization, and the scaling lessons learned from applications used by millions worldwide.

Refactoring at Scale – With Jose Calderon
Episode 4
1 hour and 6 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Jose Calderon — Lead Software Engineer at JP Morgan Chase, conference speaker, and Java/Spring community leader — to dive deep into refactoring vs rewriting at scale, how to track and justify architecture decisions, and the testing strategies that keep enterprise systems reliable.

Pragmatism at Scale – With Tudor Barbu
Episode 3
56 minutes

In this episode of Señors @ Scale, host Neciu Dan sits down with Tudor Barbu — Principal Engineer at Logify, former Tech Lead at Personio and engineer at Skyscanner and DaVinta — to unpack 20+ years of engineering decisions, debugging scars, and career evolution.

Interviewing at Scale – With Angel Paredes
Episode 2
1h 01 min

In this episode of Señors @ Scale, host Neciu Dan sits down with Angel Paredes — Engineering Manager at Datadog, formerly Staff at Glovo and Tech Lead at PayPal — to explore test infra, AI's impact on interviewing, and how to lead without losing your technical edge.

Performance at Scale - With Danilo Velasquez
Episode 1
57 min

In this kickoff episode of Señors @ Scale, host Neciu Dan sits down with Danilo Velasquez — Staff Engineer at Adevinta and longtime frontend performance obsessive.

Discover actionable insights and hard-earned lessons from senior engineers who've been in the trenches.

Why Señors @ Scale?

  • Checkmark Real-world scaling stories from senior engineers and architects
  • Checkmark Deep technical discussions about architecture patterns and trade-offs
  • Checkmark Career insights for developers transitioning to senior roles
  • Checkmark War stories from scaling applications to millions of users
  • Checkmark Leadership and team building strategies for tech leads
  • Checkmark Latest trends in software architecture and system design
  • Checkmark Practical advice you can apply immediately in your work

🎤 Meet Your Host

Neciu Dan
Neciu Dan

Tech Lead, Co-Founder, Speaker with experience scaling applications to millions of users. Dan has worked with teams ranging from startups to enterprise, and is passionate about sharing the hard-earned lessons from the trenches.

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