Front-End Developer

We have a great opportunity for a Front-End Developer to join our excellent software development team based in Cambridge. This is an ideal role for someone who wants to join a friendly, small and highly technical team where you can have a real impact.


We have a great opportunity for a Front-End Developer to join our excellent software development team based in Cambridge.


GMSL is the market-leading provider of 24/7 energy portfolio management services and software in Europe and plays a vital role in the energy business. We have unparalleled expertise in the industry, built up over 25 years of operating in energy markets throughout Europe.

Our software is used by some of the largest energy companies in the world and is developed using our unique operations experience, giving us clear insight into our customers’ needs.

For more background on GMSL see

The role

You will be embedded as a front-end developer in one of our small agile development teams. You will collaborate alongside the product owner, tester and other developers to develop features for Chorus, one of our leading software products.

Our view of agile software development is inspired by eXtreme Programming rather than Scrum. We focus more on the technical practices that enable agility, such as TDD, Pair Programming, SOLID, Simple Design etc. but we do find some of the rituals useful, such as Daily Stand-ups and Retrospectives.

The product

Chorus is a web application that enables banks, energy and trading companies to manage their gas portfolios across Europe. Users upload their trading activity to Chorus via API, and Chorus automatically communicates to the relevant market operators and third parties. Chorus continuously processes information received back from market operators to show users the live status of their portfolio.

Chorus is used in-house by the GMSL operations team to provide gas scheduling services to its clients. It is also licensed by customers who use it within their own operations teams.

The technology

The Chorus web application is developed using React with Typescript. We use Jest (React Testing Library) for unit testing and Cypress for integration testing. The Chorus backend APIs are developed using .NET (C#) in a microservice architecture hosted on AWS.

Your experience

  • You will have a minimum of three years development experience using React in a commercial environment.
  • You will have deep experience of CSS and underlying web technologies.
  • Experience of any of the other technologies we use would be beneficial but not essential.
  • You will be comfortable working in an agile environment. Experience of any eXtreme Programming practices that are key to being agile, such as TDD, Pair Programming, SOLID, Simple Design would also be beneficial.

Your skills

  • You will be the sort of person who enjoys getting things done.
  • You will need to be great at thinking logically, but also laterally.
  • You must be able to communicate your thoughts well.
  • You should enjoy collaborating with others and relish solving challenging problems.


Salary will be reflective of your level of experience.

  • Location              Cambridge – Hybrid (2-3 days a week in office)
  • Job type               Permanent
  • Hours                   Mon-Fri, 37.5 hours per week

All our teams spend at least one day a week in the office and this role requires 2-3 days a week in office, so you need to be based within easy travel to Cambridge.


Our benefits include:

  • Annual discretionary bonus scheme
  • Company pension scheme (6% employer contribution)
  • 25 days’ holiday
  • Private health care
  • Flexible working hours and remote working
  • Casual dress and a relaxed environment
  • Employee assistance program
  • Loyal service award
  • Cycle to Work scheme
  • Fresh fruit and great coffee
  • Free access to Cambridge University Botanic Gardens
  • Monthly team pub lunches

Working at GMSL

We are a small team. We have around 30 people in our software team, so even though we are a part of a company of around 100 people overall, the software team has retained a small team “startup” feel. Your colleagues will be from a wide variety of backgrounds – we encourage diversity, openness and gender equality.

We value the long-term. The success and stability that comes from 25+ years’ experience in software development means we value the long-term in terms of software development and the development of our people.

We empower teams and individuals. Teams are empowered to own their products. Individuals are empowered to make meaningful contributions at every level.

We are agile. We develop using an agile approach, which focuses on our ability to respond to change. We broadly follow XP practices, but we take a pretty pragmatic view about this. We adapt our processes to support the context, rather than follow a standard rigid process for all situations. We trust the teams who do the work to decide how best to do it.

We strive to make GMSL a great place to work. The management team are friendly, approachable and care personally about the people on their team. Managers consider the people on their team as the first priority and take our people’s personal situations into account in decision-making wherever they can.

We are flexible. Our teams typically work at least one day a week in our office in Cambridge, and the rest of the time working from home. We also have a day a month where the whole software department come in and we all go to the pub for lunch. Hours are flexible and are based on the needs of the team.

How to apply

Simply email us your CV and covering letter.

GMSL have a responsibility to ensure that all employees are eligible to live and work in the UK, proof of right to work in the UK will be requested prior to employment.

Recruitment agencies

We’ll be in touch if we need you to help us. We don’t have time to take cold calls from recruitment agencies. Thanks for your understanding!

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