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This job expired on 08/08/2026. It no longer accepts applications.
Senior Full Stack Engineer (TypeScript / Next.js + AI-First) (Remote)
Braintrust
Job description
About the role
We are looking for a Senior Full Stack Engineer to lead technical execution and mentor the team while building AI‑first software solutions. This is a remote contract position for an initial three‑month term, with the possibility of extension.
Key responsibilities
- Provide technical leadership and mentorship to junior and mid‑level engineers.
- Design and architect AI‑focused applications, creating diagrams and design docs using Mermaid, Figma, Miro, Excalidraw or Lucidchart.
- Develop production‑ready TypeScript features across front‑end, back‑end, background jobs, data models and tests.
- Conduct thorough code reviews for both human‑ and AI‑generated pull requests.
- Resolve complex production issues and incorporate user feedback into improvements.
- Collaborate with product managers, UX/UI designers and other stakeholders to align technical solutions with business goals.
- Stay up‑to‑date with agentic development tooling (Claude Code, Codex, MCP servers, sub‑agent patterns) and propose workflow enhancements.
- Participate in quality assurance and deployment processes to ensure reliability.
Required profile
- Senior‑level experience with full‑stack development.
- Strong ability to lead, mentor and communicate technical concepts clearly.
- Proactive problem‑solver who can translate feedback into actionable improvements.
- Comfortable working remotely and managing responsibilities independently.
Required skills
- TypeScript
- Next.js
- AI development tools (Claude Code, Codex)
- Mermaid for diagramming
- Design collaboration tools (Figma, Miro, Excalidraw, Lucidchart)
What we offer
- Remote work flexibility.
- Initial 3‑month contract with potential extension.
- Opportunity to shape AI‑first product architecture.
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