Senior Backend Developer Nodejs

Kraków, małopolskie🌐 Remote💼 Full-time🗓 2026-05-06 → 2026-08-06

Core

Designing and building robust server-side architectures, APIs, and microservices for AI-native development platforms and digital ventures.

Role type

Senior Backend Developer (Node.js)

Builds

AI-native development systems and scalable server-side foundations for digital ventures

Domain

SaaS / AI tools / Cloud infrastructure

Deliverable

production ML models | product features

Required skills

Node.js, TypeScript, Nest.js, PostgreSQL, MongoDB, Redis, AWS/GCP/Azure, Docker, CI/CD, microservices, event-driven architecture

Preferred skills

AI pair-programming tools (Claude Code, Cursor), automated testing, clean architecture, performance optimization

Technologies

Node.js, Nest.js, PostgreSQL, MongoDB, Redis, AWS, GCP, Azure, Docker, Claude Code, Cursor

Responsibilities

Design and build robust APIs and microservices; develop AI-native platform features; architect, implement, optimize, monitor, and scale backend systems; champion API design, database optimization, security, and DevOps automation

Seniority

Senior, hands-on IC

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About rimthan

Rimthan is a corporate venture builder operating across Saudi Arabia and the GCC. We launch ventures with regional partners and act as the product, design, and engineering muscle behind them. We are looking for a Senior PM who is genuinely AI-native, an expert prototyper, and obsessed with execution. You will own product surface area on one of our ventures, working hand in hand with venture building, engineering, design, and UX research, and you will use AI to compress the distance between idea and working software to days, not weeks. This is a role for someone comfortable being uncomfortable.