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Avantos.ai

Senior Software Engineer, Full-Stack

Avantos.ai

Senior Full Stack Engineer focusing on React/Next.js and Golang at Avantos AI. Leading frontend design and contributing to backend services for an AI-native financial platform.

Posted 7/27/2026full-timeNew York City • New York • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies
GoJavaScriptNext.jsReact

About the role

Key responsibilities & impact
  • Lead frontend architecture and experience design — owning React/Next.js 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.

Requirements

What you’ll need
  • 8+ years of engineering experience building production web applications.
  • Expert-level frontend depth — React + Next.js 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.

Benefits

Comp & perks
  • 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.