Fullstack Developer (.NET & Angular/React)

SINGU; Kraków, Warszawa; On-site; PLN 180,000 - 300,000; Full time

Job summary

SINGU is seeking a Full Stack Developer to join our product team in Kraków. You will contribute across backend architecture and customer-facing interfaces, collaborating with a Team Lead, Product Manager, and Product Designer to deliver reliable, secure software.

You’ll participate in code reviews, uphold strong testing practices, and use AI-assisted development tools to speed delivery while maintaining code quality. A collaborative, Agile environment awaits.

Qualifications

• Solid hands-on experience with .NET and C#.
• Experience building interfaces in Angular/React and TypeScript.
• Experience designing REST APIs and working with PostgreSQL.
• A genuine testing habit — unit and integration tests as standard practice.

Responsibilities

• Build and evolve backend applications in .NET and C#.
• Design REST APIs that are consistent, secure, and well-documented.
• Work with PostgreSQL database structures and optimize queries, indexes, and performance.
• Build user interfaces in Angular/React and TypeScript; participate in frontend rewrite.

Skills

NET

C#

Angular

React

TypeScript

REST APIs

PostgreSQL

Testing

CI/CD

English communication

Tools

PostgreSQL

GitHub

CI/CD

Job description

About SINGU

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.

Our unified CAFM platform already powers the daily operations of over 250 million m² of real estate worldwide, supporting more than 500,000 professionals. Following our union with the UK’s Micad and Germany’s net-haus, we now help manage 100,000+ buildings across 35+ countries — and we’re just getting started.

Backed by a leading growth equity investor, we’re scaling rapidly and partnering with global leaders such as Prologis, ECE, CTP, Hillwood, Logicor, GLP, and Unibail-Rodamco-Westfield. As we continue to grow through strategic acquisitions and bold innovation, we stay true to our core values: adaptability, collaboration, and client focus.

About the Role

We're seeking a Full Stack Developer to join our product team and contribute across backend architecture and customer-facing interfaces. You'll collaborate with the Team Lead, Product Manager, and Product Designer to build reliable, secure, high-quality software.

As part of the team, you'll participate in code reviews, uphold strong testing practices, and effectively use AI-assisted development tools like Cursor or Claude Code.

What You'll Do

Backend Development

• Build and evolve backend applications in .NET 10 and C# 14




• Design REST APIs that are consistent, secure, and well-documented




• Work with PostgreSQL database structures, and help optimize queries, indexes, and overall performance

Frontend Development

• Build user interfaces in Angular/React and TypeScript




• Take an active role in our frontend rewrite using Angular/React




• Ensure UI implementations are performant, maintainable, and true to the product design

Quality & Testing

• Treat unit and integration 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

AI-Assisted Development

• Use AI tools (Cursor, Claude Code, or similar) to accelerate development, code analysis, and refactoring




• Critically evaluate the correctness, quality, security, and performance of AI-generated code before it ships

Delivery & Collaboration

• Work within GitHub and CI/CD to deliver features reliably and on time




• Collaborate closely with your Team Lead, Product Manager, and Product Designer, and actively participate in Agile ceremonies




• Share knowledge with the team

What We're Looking For

• Solid hands-on experience with .NET and C#




• Experience building interfaces in Angular/React and TypeScript




• Experience designing REST APIs and working with PostgreSQL




• A genuine testing habit — unit and integration tests as standard practice




• Comfort participating in code reviews and giving direct, useful feedback




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




• Good command of English and strong collaboration skills within a cross-functional team

Why This Role Matters

This isn't just about shipping features — it's about contributing to a team that raises its own technical bar. You'll have real input into technical decisions, architecture, and process, working alongside a Team Lead, Product Manager, Product Designer, and the wider Engineering and Platform teams.