Senior Full Stack Engineer

2 days ago

Novi Sad, Vojvodina, Serbia Avantos Full time 60,000 - 120,000 per year

Company overview

We're on a mission to make it easier for businesses to serve their customers. While many companies have incredible digital infrastructure, the people who understand customer experience best are blocked from changing the very processes that make it happen. We're changing that with purpose built AI, thoughtful design, and a relentless focus on the user.

We're building an AI platform that brings agility, scale, and transparency to businesses like never before. We're driving human-centered services for our clients by applying the same principles within our own processes—leveraging an AI engine that orchestrates data, platforms, and every step of the user experience.

We're building a diverse, creative team in New York, with flexible hybrid work options. Our founding team—including graduates from Wharton, MIT, and the Royal College of Art—has a proven track record of building unicorn software companies, where design, product, and engineering cultures are fully integrated.

Job summary

We're looking for a Senior Full Stack Engineer with a strong frontend core — someone who thinks in first, but is fully capable of contributing at the backend layer using Golang when needed.

  • Lead frontend architecture and experience design — owning interfaces end-to-end, with a focus on performance, UX, and scalability.
  • Integrate cleanly with backend services and contribute to Golang APIs when needed — not just consume them.
  • Collaborate tightly with product and design on experience decisions — not just implementation.
  • Influence architecture, reliability, performance strategy, and engineering standards.
  • Write high-quality, clean, well-structured code — and enforce that quality in reviews.
  • Act as a technical force multiplier — mentoring, unblocking, and setting the technical bar.

Your skills will include

  • 8+ years of engineering experience building production web applications.
  • Expert-level frontend depth — React + mastery (streaming, modern rendering patterns, state strategy).
  • Proven ability to design high-performance, scalable, modern frontend systems with clarity and intentionality.
  • Solid backend competency — ideally Golang, but strong API design fluency is required.
  • Deep understanding of performance, caching, hydration, code splitting, bundling, deploy strategy, DX/UX tradeoffs.
  • Product and architecture instincts — you care about what should be built, not just how.

Nice to haves

  • AI, fintech, or data-intensive product experience.
  • Experience shaping design systems, frontend platforms, or reusable architecture patterns.
  • Edge rendering, observability tooling, or event-driven architecture familiarity.
  • Experience with relational databases (Postgres)

What We Offer

  • Competitive compensation + meaningful equity.
  • Opportunity to define the technical foundation of a greenfield AI platform.
  • A culture optimized for engineering excellence, focus, deep work, and ownership — not ticket factories.

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