Full-Stack .NET Engineer – AI-driven Web & API

ABAX AS; Gdańsk; On-site; PLN 120,000 - 180,000; Full time

Job summary

ABAX is seeking an experienced Full-stack Developer to join our team in Gdańsk, Poland, working across the full stack on both back-end and front-end features. You will own end-to-end development, collaborating with UX/UI designers, Product Managers, QAs, and engineers to deliver scalable, maintainable, and user-friendly software.

The role emphasizes hands-on work with C#/.NET, REST and gRPC APIs, databases, and frontend frameworks, plus daily use of AI coding assistants and deployment to

Qualifications

• 3+ years of professional experience with C# and modern .NET.
• Experience building and maintaining REST and gRPC APIs.
• Experience with PostgreSQL, MongoDB, and SQL Server.
• Hands-on use of Vue 3/TypeScript or React/Angular with willingness to switch.
• Clear communication in Polish and English.

Responsibilities

• Develop and maintain the C#/.NET services behind ABAX's fleet management platform.
• Work with vehicle data end-to-end: Kafka streams, PostgreSQL and MongoDB.
• Build customer-facing AI features.
• Make changes to customer-facing web features in Vue 3 and TypeScript.
• Own changes through production: code review, GitLab CI/CD, and deployment to Kubernetes.

Skills

C# / .NET

REST APIs

gRPC

PostgreSQL

MongoDB

SQL Server

Kafka

Vue 3

TypeScript

AI coding assistants

Polish & English

Tools

Kubernetes

GitLab CI/CD

Docker

Job description

ABAX is seeking an experienced Full-stack Developer to join our team in Gdańsk, Poland, working across the full stack on both back-end and front-end features. You will own end-to-end development, collaborating with UX/UI designers, Product Managers, QAs, and engineers to deliver scalable, maintainable, and user-friendly software.

The role emphasizes hands-on work with C#/.NET, REST and gRPC APIs, databases, and frontend frameworks, plus daily use of AI coding assistants and deployment to