Senior backend JS developer

Our client, headquartered in Germany, was founded in 2024.
The company provides an AI-powered platform designed to automate public tender acquisition and qualification for companies. It assists in optimizing tender bids, reducing errors, and increasing tender wins.
The solution is based on large-scale data aggregation, document workflow automation, and AI-powered search, helping companies find and win tenders faster.
About the role
You will be working in a small team, with no dedicated management layer.
The project is data-heavy and, in terms of complexity, closer to:
search engines;
large document storage systems;
infrastructure at the level of “mail/directory/index”.
The key value of the engineer is correct and scalable data handling, not just “writing code.”
Your future tasks
• Design and scale high-performance features using Node.js, TypeScript, and NestJS.
• Optimize complex PostgreSQL schemas and queries for large datasets.
• Design microservices for document processing, indexing, and search.
• Integrate LLM-powered features (OpenAI/Claude) for automated tender analysis
• Take full ownership of product features with minimal guidance in a flat structure.
Tech stack
Languages: TypeScript, Python
Frameworks: FastAPI, Node.js, Drizzle, Mantine UI
Databases: PostgreSQL (PostGIS, BM25, semantic search)
Queues: Redis, BullMQ
We expect from you
• Strong backend engineering experience (5+ years).
• Practical experience with REST API.
• Deep understanding of PostgreSQL, including:
• data schema design
• indexing
• sharding
• working with extensions (PostGIS, etc.)
• understanding what actually happens inside the database, not only at the ORM level.
• Product development experience, such as BigTech companies or product startups with real production load.
• English language at B2+ level (internal communications are in English).
• Your time zone and location (GMT-GMT+5, except Russia and Belarus).
Amazing, if you have experience with
• Node.js/TypeScript on backend.
• Fine-tuning PostgreSQL, Sharding, Replication, and High Availability.
• Document processing pipelines at scale.
• Semantic search, ranking and fine-tuning complex queries.
• Cloud architecture and infrastructure.
Company offers
• Remote asynchronous work with time overlap: 11:00–17:00 CET for calls.
• Collaboration type: Contractor (via Deel)
• Full-time job.
• No hour tracking.
• Potential equity/options in the future.
• Flexibility and freedom in the engineering approach.
• No bureaucracy, real impact on architecture and infrastructure.