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September 14, 2026

FullStack Developer (.Net / React)

Senior • On-site

49,920,000 - 54,912,000 PLN/yr

Gdynia, Poland

Quick Facts

  • Salary: 1200–1320 PLN/day (B2B)
  • Work model: hybrid; 3 days/week from the office in Gdynia

Description

Work on developing a digital platform for the maritime industry supporting fleet CO2 emissions reporting and verification. The platform uses a modern microservices architecture with Microsoft technologies, Azure, and selected open-source solutions, with a focus on scalability, reliability, and digital transformation.

Responsibilities

  • Collaborate with international development teams to design solutions and deliver projects.
  • Design and develop data-driven applications and scalable software solutions.
  • Build and maintain robust services and APIs.
  • Develop reusable code, components, and libraries.
  • Optimize applications for performance, reliability, maintainability, and scalability.
  • Use AI-assisted development tools to support coding, testing, documentation, and problem-solving.
  • Contribute to technical discussions, knowledge sharing, and continuous improvement.

Requirements

  • 8+ years of professional experience in software development.
  • Strong experience with C#/.NET, MS SQL, React, and TypeScript.
  • Good understanding of microservices architecture, APIs, and modern system design principles.
  • Experience with Web API, GraphQL, Web Components, and Azure Service Bus.
  • Experience across the full software development lifecycle: design, development, testing, deployment, and maintenance.
  • Practical experience using AI-assisted development tools (e.g., Microsoft Copilot or similar) in daily engineering work.
  • Experience working in Agile environments.
  • Strong communication skills and fluent English.
  • Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field, or equivalent practical experience.

Benefits

  • Join a global team building scalable, cloud-based solutions.
  • Work on impactful projects driving digital transformation and sustainability in sectors like energy, maritime, and manufacturing.
  • Stable, international work environment focused on quality, innovation, and efficiency.
  • Integration meetings as part of the Jit Community.

Technologies you’ll work with