Full-stack Developer (React + .NET)

Cracow Or Warsawfull-timemid

EngineeringFullstack Developer

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Quick Summary

Key Responsibilities

you can work in an existing codebase,

Technical Tools

EngineeringFullstack Developer

At SINGU, we’re redefining how the world’s most ambitious real estate companies run their operations. Our mission is to become Europe’s leading platform for managing warehouse, logistics, retail, and multi-site commercial real estate portfolios — empowering our Clients to protect revenue, boost efficiency, and unlock new value across every aspect of their business.

If you’re ready to help build Europe’s leading platform for property operations — and make a tangible impact on how the real estate industry works — join SINGU and be part of this transformation.

About the Role

~1 min read

Backend: .NET 10, C# 14, REST APIs, Redis
Database: PostgreSQL
Frontend: React (TypeScript) , AngularJS
Tooling: GitHub, CI/CD, unit and integration testing
AI-assisted development: Claude Code / Cursor / Copilot are part of our daily workflow

Working C# knowledge: you can work in an existing codebase, ship smaller backend changes and grow from there

Proven experience integrating and designing REST APIs

Working knowledge of PostgreSQL

A genuine testing habit: unit and integration tests as standard practice

Comfort participating in code reviews and giving direct, useful feedback

Ownership of delivered features, from technical design to production and support

Practical experience with AI-assisted development tools, and the judgment to critically assess what they produce

Nice to Have

~1 min read

Experience improving test automation and local development environments
PostgreSQL query optimization (indexes, execution plans)
Docker and cloud (AWS)

Responsibilities

~1 min read

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Build user interfaces in React and TypeScript as a core contributor to our frontend rewrite
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Turn designs into responsive, accessible and performant UI, built on maintainable code
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Contribute to shared components and our design system

Build and extend backend features in .NET 10 and C# 14
Design and develop REST APIs that are consistent, secure and well documented
Work with PostgreSQL database structures and help optimize queries, indexes and performance

Treat unit, integration and end-to-end testing as a core part of development, not an afterthought
Participate in code reviews with clear, constructive feedback
Write clean, secure, maintainable code aligned with our standards and best practices

Use AI tools (Cursor, Claude Code or similar) to accelerate development, code analysis and refactoring
Evaluate the correctness, quality, security and performance of AI-generated code before it ships

Take part in product discovery and feature specification, as well as technical breakdown and estimation before development starts
Work within GitHub and CI/CD to deliver features reliably and on time, and own them through to production
Collaborate closely with the Team Lead, PM and Designer day to day and actively participate in Agile ceremonies
Share knowledge and support your teammates

If this role sounds like a good fit, we’d love to hear from you. Apply and help us build technology that supports critical operations every day.