Lead Full-Stack Engineer: React & .NET API Architect

Thrive IT Systems; Warszawa; On-site; PLN 192,000 - 312,000; Full time

Job summary

Thrive IT Systems in Warsaw is seeking a Full Stack Lead Engineer to drive development across a React frontend and ASP.NET backend. You will design and implement RESTful APIs, manage data models, and ensure the system scales efficiently in a B2B engagement.

This role supports a 12-month contract with extension possibilities and requires strong frontend and backend expertise. The ideal candidate has hands-on experience with AKS, CI/CD, and modern web technologies, and can optimize applications

Qualifications

• Proficient in React for dynamic UIs with 5–8 years of experience.
• Hands-on with C#, ASP.NET MVC Web API, Entity Framework, and RESTful APIs.
• Experience with SQL databases (SQL Server, PostgreSQL, MySQL) or NoSQL (MongoDB/Cassandra).
• Hands-on AKS, Git, and CI/CD practices.
• Ability to design scalable, high-performance applications.

Responsibilities

• Develop full-stack solutions using React frontend and ASP.NET backend.
• Design, build, and optimize RESTful APIs and data models.
• Ensure scalable architecture and robust CI/CD processes.

Skills

React

Redux/Context API/hooks

RESTful APIs

CI/CD

Performance optimization

Typescript

Tools

AKS

Git

GitHub Co-Pilot

SQL (PostgreSQL/MySQL)

ASP.NET MVC Web API

Entity Framework

Job description

Thrive IT Systems in Warsaw is seeking a Full Stack Lead Engineer to drive development across a React frontend and ASP.NET backend. You will design and implement RESTful APIs, manage data models, and ensure the system scales efficiently in a B2B engagement.

This role supports a 12-month contract with extension possibilities and requires strong frontend and backend expertise. The ideal candidate has hands-on experience with AKS, CI/CD, and modern web technologies, and can optimize applications