IN SHORT

The Senior Developer is responsible for implementing code changes to new and existing codebases in line with standards and best practises to deliver requirements as defined by the business.WHAT WILL YOU DO

In this role you will design, code, test, and refine high-quality programs and integration services. You will work across the full development lifecycle, from building and verifying complex solutions to documenting and improving existing systems. You will help shape the choice of tools, methods, and security practices, ensuring robust and well-engineered outcomes. You’ll also take part in code reviews—both contributing to feedback on your own work and leading reviews for colleagues—helping to maintain best practices and drive continuous improvement.Undertakes complete design of moderately complex software applications or components.Applies agreed standards, guidelines, patterns and tools. Assists as part of a team in the design of components of larger software systems. Specifies user and/or system interfaces.Creates multiple design views to address the different stakeholders\'' concerns and to handle functional and non-functional requirements, considering all relevant factors, including security. Assists in the evaluation of options and trade-offs.Assists in designing functional test cases and creating test scripts.Supports the preparation of test data for functional testing under supervision.Executes and records manual and automated functional tests, analysing results and reporting on findings, issues and risks.Collaborates in reviews of work with others as appropriate.WHAT WILL YOU BRING

Proven advanced experience in modern approaches towards software development (e.g. Scrum, Kanban, DevOps)Proven advanced experience in MS SharePoint development and other Microsoft 365 products. Strong knowledge the back-end configurations of SharePoint.Profound knowledge in Microsoft .Net, C#, SQL Server, ASP.NET, ASP.NET MVC, web UI frameworks (Vue, Angular, React) and user interface design for at least 3 years.Proven advanced experience systems analysis, design, and programming techniques and re-factoring;Proven advanced experience to translating functional requirements to technical solutionsKnowledge of system security practices, compliance requirements, and risk managementProven ability to resolve technical issuesProven advanced experience in supporting the unit testing and integration testing cycles.ABOUT US

Securing Energy for Europe – it’s a simple statement, with a bold ambition. SEFE is not just our name, but also encompasses everything that drives us. To accomplish this, we’re taking immediate action to secure gas supply – but also looking forward, to explore our role in the European energy transformation and how we can contribute to a stable and sustainable future.SEFE, an international energy company, ensures the security of supply and drives the decarbonisation of its customers. SEFE’s activities span the energy value chain, from origination and trading to sales, transport, and storage. Through its decades-long expertise in trading and the development of its LNG business, SEFE has become one of the most important suppliers to industrial customers in Europe, with an annual sales volume of 200 TWh of gas and power. Its 50,000 customers range from small businesses to municipalities and multinational organisations. By investing in clean energies and especially in the hydrogen ecosystem, SEFE is contributing to the energy transition. The company employs around 2,000 people globally and is owned by the Federal Government of Germany.Our international teams work across locations in Europe, Asia, and North America. We’re passionate about energy and the important role it can play in shaping a better future.Securing energy – now and for the future.OUR BENEFITS

We’re committed to creating an inclusive environment that embraces diversity and fosters the development of knowledge, skills and experience. Whatever your role, you’ll find an open, welcoming atmosphere that empowers you, and recognises your contribution. We offer a competitive starting salary supported by a comprehensive, and broad reaching benefits package which includes:Bonus earning potentialNon-contributory pension25 days holiday plus bank holidays and 2 volunteering daysBuy / sell holidaysLife assuranceMedical and dental insuranceRange of optional flexible benefitsBased from our offices in London, you can benefit from hybrid working offering the flexibility to spend some of your working week at home. We are committed to supporting your career growth with opportunities to develop both your knowledge and experience through a blended approach to learning.Information at a GlanceApply nowJob Title: Senior Developer Business Operations Dev and QA (m/f/d)Job Country: United KingdomJob Location: London, United KingdomPosting Start Date: 20/08/2025Business Function: Information TechnologyContract Type: PermanentPrivacy Policy

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