Developer .NET (Commercial Operations)

IT & Delivery



Providing the business with beneficial, user focused enhancements to the commercial operations and trading systems and delivering robust, scalable, and supportable solutions

About us

Securing Energy for Europe GmbH (SEFE GmbH) is a major European energy company focused on maintaining the security of supply and generating commercial value in Europe. Its main business areas include supplying energy to customers, energy trading, gas transportation and the operation of gas storage facilities. SEFE GmbH is an internationally operating group consisting of around 50 companies in 16 countries in Europe, Asia and North America. The SEFE Group employs approximately 1,500 employees, around 200 of whom work at its Berlin headquarters.

SEFE Marketing & Trading Limited (SM&T) is an integral part of the SEFE Group. Headquartered in London, SM&T is an agile multi-commodity trader and trading partner. With deep experience in derivatives, digital and analytics and ready for the opportunities arising from the energy transition, we seek to create value, both on a proprietary basis and for its partners, in all key European gas, LNG, power and environmental products markets.

Our culture is defined by our people. Through living our values every day, we continue to create a culture that enables us all to succeed. We work as one team with our customers, our parent company and each other in order to understand each other’s needs. With an unstoppable passion for excellence, growth and learning, we’re committed to creating an environment that fosters the development of knowledge, skills and experience, so that our people can thrive and prosper in their careers with us. We believe that we have the best team in the industry which makes us a trusted partner across international capital and energy markets. Our diverse employee base, with a wealth of expertise, knowledge and experience makes SM&T a truly exciting place to work. We encourage new ideas and initiatives as innovative thinking is central to how we do business. Most importantly, we are a growing and developing business where inspired individuals can make a difference and help shape our future.

Role objectives

Providing the business with beneficial, user focused enhancements to the commercial operations and trading systems and delivering robust, scalable, and supportable solutions

Duties & Responsibilities

  • Understand business requirements and carrying out technical business analysis
  • Delivering agile software solutions using Microsoft technologies
  • Ensure the SEFE development life-cycle and standards are followed
  • Handing over all solutions to the IT support team, and providing 3rd line support
  • Documenting and sharing knowledge on all development

Skills & Competencies

  • Business Driven Development (BDD) and Test Driven Development (TDD) using testing tools such as MSTest and Mock Objects
  • Kanban and similar agile methodologies
  • Strong technical ability in the following technologies:
    • .NET 4.5.2 or above
    • C#
    • Microsoft Azure Dev Ops and Git
    • NET, ASP.NET MVC, Ajax, jQuery and CSS
    • Entity Framework 5/6
    • SQL Server 2016 or above
    • Visual Studio 2017 and above
    • MSTest, Rhino Mocks, NSubstitute, Specflow
  • Knowledge of the following technologies would be beneficial:
    • Endur Openlink v14 and above and its .Net API (Open Components)
    • SQL Server Reporting Services, Analysis Services and Integration Services (2014 onwards)
  • Excellent communication skills, verbal and written. Ability to explain a technical subject to a non-technical audience.
  • Excellent interpersonal skills including teamwork and facilitation
  • Ability to engage and work with stakeholders globally
  • Enthusiastic and innovative approach to work
  • Analytical thinker
  • Excellent programming fundamentals
  • Ability to balance ideal solutions with practical delivery of requirements
  • Extensive object oriented analysis and design experience
  • Excellent knowledge of design patterns and re-factoring


  • Substantial software development experience
  • Substantial experience in building solutions in a rapidly growing and fast-moving business environment
  • Experience within a commodity/financial trading/betting organisation is essential
  • Experience with Endur and its .Net API (Open Components) would be beneficial


  • Degree in a scientific, computing or engineering discipline or equivalent experience
  • Professional certifications in desired skill areas an advantage



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