Senior .Net Developer

Application Deadline: 15 May 2026

Department: Technology

Employment Type: Full Time

Location: Poland

Description

🚢 Discover OneOcean:

OneOcean is a unified brand born from the integration of OneOcean and Ocean Technologies Group.

Owned by Lloyd’s Register, an organisation with more than 260 years of trust, integrity and leadership at sea, OneOcean combines the agility and ambition of a fast-moving innovator with the strength and stability of one of the world’s most trusted maritime institutions.

At the heart of OneOcean is a portfolio unlike any other in maritime. A comprehensive, integrated portfolio built on years of expertise, trusted by thousands of maritime professionals around the world.

🎯 Our Mission: Our mission is clear. In the race to zero emissions, our research, advisory and technical expertise and industry-firsts are supporting a safe, sustainable maritime energy transition. Today we are a leading provider of classification and compliance services to the marine and offshore industries, helping our clients design, construct and operate their assets to accepted levels of safety and environmental compliance.

🔍 Why Join OneOcean Crew?

• Legacy & Innovation: We were created more than 260 years ago as the world’s first marine classification society to improve and set standards for the safety of ships.
• Global Impact: Our digital solutions are relied upon by more than 30,000 vessels, following the acquisition of OneOcean in 2022 and Ocean Technologies Group in 2024.
• Product Offering: Covering five proven product areas - learning, fleet operations, compliance, voyage planning and performance management - supporting its customers from ship to shore, from training and people operations, to voyage compliance and optimisation.
  
  

🧭 Navigating the position: Senior .Net Developer

Senior .Net Developer is based in Poland and is fully remote, reporting to Technical Technology Lead.

You will dive deep into the realms of technological marvels, crafting the backbone of an educational revolution. With each line of code, you'll navigate through uncharted waters, shaping a world where learning transcends boundaries. Ready your sails for a journey where your work illuminates the path to discovery and knowledge for learners across the globe. This isn't just a role; it's your mark on the future of digital education.

Key Responsibilities

Develop and Maintain Software Applications:

• Design, code, test, debug, and document software applications using .NET, cloud and related technologies.
• Ensure the performance, quality, and responsiveness of applications.
• Collaborate with the team to define, design, and ship new features.
  
  

Collaboration And Support

• Work with project leaders, product owners, and developers to understand business requirements and translate them into technical solutions.
• Provide ongoing maintenance, support, and enhancements in existing systems.
• Offer support to end-users of the application, by troubleshooting and problem solving.
  
  

Continuous Improvement

• Stay up to date with new technology trends and best practices in .NET development.
• Continuously improve the codebase, fix bugs, and optimize performance.
• Participate in code reviews to ensure code quality and shared knowledge.
  
  

Testing And Documentation

• Create and maintain comprehensive documentation for software solutions.
• Develop and implement unit and functional tests to ensure code quality.
• Assist in defining test scenarios and in testing the developed functionality
  
  

Skills, Knowledge, And Experience Required

Educational Attainment

• Bachelor’s degree in computer science, Software Engineering, or a related technical field
• Equivalent practical experience or certifications (e.g. Microsoft Certified: Azure Developer Associate, .NET certifications) will also be considered
• A commitment to continuous learning and staying current with modern development practices is highly valued
  
  

Professional Background

• Proven experience in SaaS or product-centric environments, ideally involving complex or data-driven platforms
• Comfortable working in fast-paced, high-scale tech teams with Agile/DevOps practices
• Experience contributing to enterprise-grade software with global user bases
• Maritime or e-learning domain knowledge is a plus—but not required
• Ability to quickly understand and adapt to domain-specific challenges in regulated or mission-critical sectors
  
  

Expected Areas Of Competence

• Expertise in .NET and object-oriented programming
• Extensive experience commercial development experience
• Strong knowledge of microservices architecture, distributed systems, and message queues (e.g. RabbitMQ)
• Proficient in Test-Driven Development and writing unit, integration, and acceptance tests
• Skilled in REST APIs, asynchronous programming, and client-server architecture
• Experience with SQL and NoSQL databases (e.g. MSSQL, MongoDB)
• Hands-on with Docker and cloud platforms (AWS or Azure)
• Familiar with CI/CD pipelines, automation, and performance tuning
• Strong communication, collaboration, and analytical skills
• Bonus: Experience with front-end tech (HTML, CSS, JavaScript), GraphQL, Keycloak, Jenkins, and ElasticSearch