Full Stack Engineer - AI Systems

Build an AI product from the ground up. Most AI applications today are still glorified chatbots. We're building something different. A1 is creating an AI-native product that can plan, reason, remember, use tools, recover from failures, and proactively help users complete real-world tasks. Think beyond prompts and chat—this is about building reliable AI systems people can depend on every day. We're looking for a Full Stack Engineer – AI Systems who wants to solve difficult engineering problems at the intersection of product, distributed systems, and LLMs. What you'll be building End-to-end AI-native product features across frontend, backend, and AI systems Agentic workflows capable of planning, tool usage, multi-step execution, and recovery Production-grade integrations with LLMs, memory, RAG, and external tools Real-time AI experiences with streaming responses and low latency Reliable systems with strong observability, evaluation, and fallback mechanisms What we're looking for ✔ Strong Full Stack Engineering experience (Next.js / React, Python, Node.js ✔ Experience building production AI applications using LLMs, RAG, or AI agents ✔ Strong system design and API architecture fundamentals ✔ Someone who thrives in ambiguity, takes ownership, and enjoys building from scratch Why join? Build a category-defining AI product from day one High talent-density team with a flat structure and no unnecessary bureaucracy Significant ownership—you'll shape both the product and the engineering direction Remote-first work environment Solve some of the hardest problems in production AI today Work alongside engineers passionate about building reliable AI systems, not demos How To Apply Submit your application by emailing a detailed copy of your updated resume in MS Word Format to Lin Jin Sen (EA Personnel Reg. No. R26159541, Achieve Career Consultant Pte Ltd EA Licence No. 05C3451)by clicking the “Apply Now ” or email to andie.lin@achievegroup. asia for a confidential discussion Current & Expected Salary Reason(s) for leaving Notice Period / Availability to commence work Equal Opportunity Statement YOUR SUCCESS IS OUR ACHIEVEMENT! By submitting any application or résumé to us, you will be deemed to have agreed and consented to us collecting, using, retaining and disclosing your personal information to prospective employers for their consideration Cessation Of Collection Of Full NRIC Numbers: In compliance with the Personal Data Protection Act and commitment to protect candidates’ personal data, Achieve Group will cease to collect, process or use full NRIC numbers during our screening and job application process. Kindly ensure your resumes provided to us does not contain your full NRIC number and full home address during your job application. We regret that only shortlisted candidates will be notified.