Senior .Net Developer

Ocean Technologies Group; Polska; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Premier Health Coverage

Vision Care Perks

Group Insurance

Pioneering Pension

Multisport Magic

Social Benefits Galore

Wellness & Support

Job summary

OneOcean is seeking a Senior .NET Developer to join the Technology department on a fully remote basis in Poland. You will design, develop, test, and maintain scalable software applications using .NET and cloud services to support our education platform.

You will collaborate with product owners, engineers, and stakeholders to translate requirements into robust solutions, participate in code reviews, and continuously improve code quality and performance while staying current with .NET trends.

Qualifications

• 8+ years of commercial software development.
• Strong .NET and object-oriented programming skills.
• Experience with microservices, cloud platforms and modern DevOps practices.

Responsibilities

• Design, code, test, debug, and document software applications using .NET and cloud technologies.
• Collaborate with project leaders and developers to translate business requirements into technical solutions.
• Maintain and enhance existing systems; provide end-user support and troubleshooting.

Skills

C#

.NET

TDD

REST APIs

GraphQL

Docker

AWS/Azure

DDD

SQL/NoSQL

React

Education

Bachelor's degree in CS or related

Certifications (Azure Developer, .NET)

Tools

MS SQL Server

MongoDB

Jenkins

CI/CD

Job description

Application Deadline: 1 December 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 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

• 8+ years in commercial development.
• Strong technical expertise in .NET and object-oriented programming.
• Proficiency in Test-Driven Development (TDD), unit, integration, and acceptance testing.
• Experience with microservices, distributed architecture, GraphQL, REST APIs, event buses, and message queues.
• Solid understanding of Domain-Driven Design (DDD).
• Good understanding of client-server architecture and asynchronous programming.
• Familiarity with SQL/NoSQL (MS SQL Server, MongoDB), Docker, and cloud platforms (AWS/Azure).
• Excellent communication, teamwork, detail-oriented, and analytical skills.

Expected Areas Of Competence

• Experience with front-end technologies (React, HTML, CSS, JavaScript, jQuery).
• Experience with CI/CD pipelines, Jenkins, and modern DevOps practices.
• Experience with AWS/Azure cloud environments.
• Familiarity with application performance monitoring tools.

Benefits

Premier Health Coverage: Dive into comprehensive health care with Polmed, covering everything from diagnostics to specialist consultations. Minimal costs for maximum health!

Vision Care Perks: See the world more clearly with glasses reimbursements every two years. Work and wellness in perfect harmony.

Group Insurance: Secure your peace with easy opt-in Warta Group Insurance. Family inclusion available, ensuring everyone you love is protected.

Pioneering Pension: Join the PPK Pension scheme effortlessly, with flexibility to adjust your involvement. OTG invests in your future, so you can enjoy the present.

Multisport Magic: Stay fit and energized with access to top-tier sports facilities. Your health, your choice, our support.

Social Benefits Galore: Embrace our Social Benefit Fund for a boost to your lifestyle. It's all about enhancing your OTG experience.

Wellness & Support: Unlock 24/7 access to professional counseling with our Employee Assistance Program. We're here for you in every way.