Backend Engineer – Platform APIs

About the role

We are building an enterprise AI platform that lets AI agents operate business applications just like a person would, running in customers' own environments, including on‑premises and air‑gapped sites. As a Backend Engineer you will own the core backend services, APIs, data model and permissions that power the platform.

Key responsibilities

• Design and implement core services in TypeScript (Node.js), Python and Go, including GraphQL, REST and streaming interfaces.
• Define the data model and storage strategy using PostgreSQL, Redis, S3‑compatible object storage and optional graph or vector stores.
• Build orchestration components such as workflow engines, state‑machine engines, queues, scheduling and retry mechanisms.
• Implement authentication, policy‑based authorisation, multi‑tenancy and an immutable audit log.
• Add observability (structured logs, metrics, OpenTelemetry) and participate in on‑call rotation for owned services.

Required profile

• 10+ years of professional software engineering experience with a strong focus on backend and platform development.
• Proven expertise in TypeScript/Node.js (NestJS, Fastify) and/or Python (FastAPI).
• Deep knowledge of API design, especially GraphQL schema design and typed contracts.
• Solid experience with PostgreSQL schema design, indexing and query optimisation.
• Experience with Docker, Kubernetes and cloud‑agnostic deployments.

Required skills

• TypeScript
• Node.js
• Python
• Go
• GraphQL
• REST
• PostgreSQL
• Redis
• S3‑compatible object storage
• Docker
• Kubernetes
• OpenTelemetry