Backend / AI Engineer

We are a Singapore-based technology company building for parts of the economy the industry has long overlooked. We bring serious engineering — including modern AI and machine learning — to problems most companies have treated as too hard, too small, or too messy to be worth it.

Zillwork is one of these. It focuses on a vast and underserved part of the global economy — a workforce that is in demand yet poorly served by the systems built around it. Zillwork is building the infrastructure to change that.

The problems we've taken on are genuinely hard, the impact is real, and the people we're building for have been overlooked for too long. If that's the kind of work you've been looking for, we'd like to meet you.

About

• Own the server and intelligence layers of the platform end-to-end — data, APIs, retrieval, and model serving.

You'll own

• A Postgres-backed platform (schema, row-level security, server-side functions) + Python services.
• A retrieval-augmented LLM pipeline (parse → vector retrieval → reasoning) behind clean, portable interfaces.
• Vector search at production latency.
• Applied ML: a reinforcement-learning pipeline + classification models, GPU training and serving.
• Data products and integration APIs (incl. India payments).

Must-have

• 5+ yrs backend with strong PostgreSQL (real SQL, schemas, RLS) + production Python.
• Production ML — models served, not just notebooks.
• Vector databases / embeddings; LLM/RAG pipeline experience.
• API design; cloud deployment.

Strong signals

• Reinforcement learning; fine-tuning / distillation; real-time systems; India payments.

How we hire

• A conversation about the hardest thing you've personally shipped. No take-home theatre. NDA before any product conversation. AI-generated applications are not considered.