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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on building and improving scalable full-stack applications and production-grade backend services used by enterprise customers. Key technologies include TypeScript, PostgreSQL, Kafka, and REST APIs. Responsibilities cover designing, developing, maintaining systems, API integration, working with event-driven and distributed architectures, and using AI-assisted coding tools. Collaboration within international remote teams and strong English skills are required.
from: 30 June 2026
to: 30 July 2026
135 - 155 złnet (+ VAT)/ hr.B2B contract
Salary details
basic salary
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
TypeScript
PostgreSQL
REST API
Kafka
Claude Code
OpenAI Codex
Our requirements
- 8+ years of professional experience as a Full-Stack Software Engineer
- Strong experience building scalable, production-grade software systems
- Excellent knowledge of TypeScript across the full stack
- Solid experience with PostgreSQL
- Strong understanding of REST API design and development
- Hands-on experience with Kafka or other event-streaming platforms
- Experience working with distributed software systems
- Practical experience using AI-assisted coding tools (e.g. Claude Code, OpenAI Codex, or similar)
- Strong English communication skills
- Located in Poland or another EU country
Optional
- Experience developing commercial SaaS or on-premise software products
- Background in enterprise software environments
- Familiarity with cloud-native architectures and modern DevOps practices
Your responsibilities
- Design, develop, and maintain scalable full-stack applications
- Build modern web applications and backend services using TypeScript
- Develop and integrate REST APIs
- Work with event-driven architectures and distributed systems
- Contribute to technical decisions and software architecture improvements
- Write clean, maintainable, and production-ready code
- Collaborate with international teams in a remote environment
- Use AI-assisted development tools to support everyday engineering tasks
About the project
You will join a distributed engineering team responsible for building and improving production-grade software solutions used by enterprise customers.
In this role, you will work on scalable backend services and modern web applications, contributing to reliable, maintainable, and high-performing systems.
You will collaborate with experienced engineers and leverage modern AI-assisted development tools to improve development speed, code quality, and engineering efficiency.
SQUARE ONE RESOURCES sp. z o.o.
At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.
This is how we work
Senior Fullstack Developer (Typescript)
135–155 zł / hr. (B2B)
I apply to:
SQUARE ONE RESOURCES sp. z o.o.
Warszawa, Masovian
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