Principal Backend Engineer

Senior • Remote

140 - 190 PLN

Krakow, MA, Poland

We are looking for a Principal Backend Engineer (Node.js / AI / LLM) for a project delivered with an international partner. The role focuses on building scalable, secure, and AI-enabled backend systems in a modern engineering environment.

Quick Facts

Fully remote work (optionally from the Krakow office)
International projects and clients
Small, collaborative team

Description

Designing and evolving backend architecture for a scalable product
Developing and maintaining backend services using Node.js, TypeScript and NestJS
Driving technical and architectural decisions across the platform
Building event-driven systems and asynchronous processing workflows
Ensuring security, reliability, observability, and maintainability of services
Supporting integrations with AI/LLM-powered solutions
Leveraging modern AI-assisted development tools in daily engineering work
Collaborating closely with product, frontend, and AI engineering teams
Contributing to engineering best practices and technical documentation

Requirements

7+ years of commercial backend development experience
Strong production experience with Node.js, TypeScript, and NestJS
Solid PostgreSQL knowledge, including query optimization, indexes, transactions, and working with raw SQL when needed
Experience building event-driven and asynchronous systems (queues, retries, idempotency, job processing)
Strong understanding of application security principles, including OAuth 2.0, RBAC/ABAC, OWASP, audit logs, secrets management, and permission boundaries
Experience designing multitenant architectures, data isolation mechanisms, and RLS-style patterns
Experience making architectural decisions and documenting them through ADRs (Architecture Decision Records) or similar approaches
Hands-on experience with AI-assisted software development tools such as Claude Code, Cursor, GitHub Copilot, Windsurf, or similar solutions
Practical experience with agentic coding, including the use of AI agents for complex development tasks, code generation, review, and iterative refinement
Ability to effectively collaborate with AI coding agents while maintaining high standards of code quality, security, and maintainability
Strong leadership skills
Very good English and Polish

Benefits

Private medical care
Sports card
Training courses
100% remote work option
International working environment and projects
Opportunity to attend conferences and publish articles

Recruitment Process

Friendly remote initial interview
Remote technical talk
Final decision

PEOPLE MORE P.S.A.

People More P.S.A. is a technology company that emphasizes respect and user-centric design in its projects. It is an offshoot of Insignia, one of the country's oldest interactive agencies, and has been operational for over three years. The company specializes in creating comprehensive and partial projects, including UX, UI, frontend, backend, and mobile solutions, for a diverse client base both domestically and internationally. People More values openness, honesty, and problem-solving, and prides itself on a small, collaborative team environment. The founders are former software developers and designers, which influences the company's culture and approach to employee relations. People More is committed to providing an international working environment and opportunities for professional growth and development.

Check if your resume is ATS-ready before applying →Build an ATS-optimized resume