Tech Co-Founder @CareerOS, ReactJS Barcelona Organizer, Speaker

Neciu Dan is the technical co-founder and tech lead of CareerOS, where he spearheads the development, maintenance, and scaling of the main application. Bringing over 12 years of engineering expertise to the table, Dan has a proven track record in the tech industry, having previously served as a Senior Product Engineer at the New York E-commerce brand, AdoreMe, and as a Senior Software Engineer at the food delivery company, Glovo.

Beyond his technical contributions, Dan is an esteemed international speaker and mentor. He passionately encourages best development practices, with a keen focus on testing, accessibility, and security. His recent speaking engagements include esteemed conferences like React Alicante, React Summit, React Rally, Utah JS, Techorama, and Frontmania.

💡 Latest Señors @ Scale Podcast Takeaways

Discover actionable insights from conversations with senior engineers about scaling applications, teams, and careers.

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.

Core Values: Build Fast and Learn, The User Comes First, Be Open / Be Kind / Be Humble / Be Acountable

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