Senior Backend Developer (Java / .NET) – Maritime / Logistics (Ukrainian+English) (m/k/d)

Senior • Remote

1,000 - 1,200 PLN

Wroclaw, Poland

Project Description

For one of our clients participating in a public tender, we are looking for Senior Backend Developers who, together with a Frontend React Developer, will form a recommended delivery team. The project involves building a greenfield solution in the maritime / port logistics domain, supporting processes related to vessel visits and integrations with various maritime administrations and port-related systems.

The system will be developed using a modern backend services architecture, with a strong focus on integrations, reliability, data security, and operational stability.

The backend technology stack will be recommended by the vendor (preferred Java or .NET).

Responsibilities

• Design and develop backend services for a maritime / logistics / vessel management system

• Develop backend services and APIs (REST / system integrations)

• Participate in business and technical requirements analysis

• Implement integrations with external maritime and port administration systems

• Design and optimize data models and business logic

• Work in an international environment and collaborate closely with the client and project team

• Ensure code quality (code reviews, testing, standards, documentation)

• Support the definition of the technology stack and solution architecture

Requirements (Must Have)

• Minimum 3 years of commercial experience as a Backend Developer

• Senior-level expertise in Java or .NET

• Participation in at least 3 international projects

• Participation in at least 2 maritime domain projects (e.g., ships, ports, vessel visits handling, harbor logistics, maritime administration systems, shipping)

• Experience in building integration-heavy systems and working with APIs

• Strong knowledge of backend engineering topics: security, scalability, performance, maintainability

• Good command of English (international environment)

• Ukrainian language skills at minimum B2 level

Nice to Have

• Experience in public sector projects or mission-critical systems

• Knowledge of microservices and/or event-driven architecture

• Cloud experience (Azure / AWS / GCP)

• CI/CD, Docker/Kubernetes

• Experience working with systems involving multiple integrations and complex business processes

• Knowledge of logistics and transportation domain

We Offer / Engagement Conditions

• Work on a high-impact greenfield project

• Long-term cooperation

• 100% remote work model

• Real influence on technology stack selection and system architecture

• Collaboration in an international environment and participation in a maritime industry project

Upvanta sp. z o.o.

Upvanta sp. z o.o. is a company operating in the technology industry, specifically focusing on developing high-performance web applications with excellent UX/UI. The company values clean code, attention to detail, and the satisfaction derived from building refined user interfaces. Upvanta sp. z o.o. employs agile methodologies to foster a collaborative environment that encourages knowledge exchange and continuous development. The company is committed to working on large-scale, business-critical projects and offers its team members the opportunity to influence product development and technological decisions. Upvanta sp. z o.o. promotes a flexible work model and maintains a friendly atmosphere with open communication and a culture of collaboration.

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