Senior Full Stack Developer in Manchester

At Gamma, we're more than just a leader in Unified Communications as a Service (UCaaS) - we're a dynamic, forward-thinking team revolutionising the way businesses connect and communicate. We provide voice, data, and mobile solutions to businesses across the UK, Germany, Spain, and the Benelux region, and we're expanding rapidly to bring digital automation and Gamma-powered services to SMEs through a growing network of channel partners. Our team thrives on collaboration, innovation, and the belief that diverse perspectives make us stronger. Join us, and you'll have the opportunity to make an impact, grow your career, and be part of a company that celebrates inclusivity and fresh ideas.

Who are we looking for?

Senior Software Engineers are responsible for developing and maintaining the Group Products suite of proprietary telecommunication solutions. Building new features and functionality across the platform and web/desktop user interfaces. In this role you will be a member of the Product Engineering function at Gamma, responsible for building and maintaining high-quality software applications in an agile environment. You will ensure that solutions meet requirements and adhere to engineering best practices. As a Senior Full Stack Software Engineer you will also play a key role in mentoring team members and fostering their professional growth.

What will you be doing day-to-day?

• Collaborate with product and engineering peers to scope, plan and estimate requirements, ensuring all solutions are well thought through and future proof.
• Evaluate trade-offs between technical solutions, providing recommendations that balance performance, maintainability, and delivery timelines to support leadership decision-making.
• Develop new features and functionality across the platform and applications, whilst maintaining the stability of existing codebase, using TypeScript, Node.js and React.
• Integrate with relevant third party services and tools where required, ensuring best practice integration rules are adhered to and integrations are stable.
• Develop APIs using best practice standards and conventions.
• Produce Solution Design documents for review before implementation including detail on security considerations, testing required and potential impacts across the stack.
• Take ownership of delivery timelines for assigned work, proactively identifying and communicating risks, blockers, and dependencies to appropriate stakeholders.
• Constructively challenge technical approaches and processes, proposing and driving improvements to team practices and ways of working.
• Use unit and E2E test frameworks to ensure a high level of coverage across the platform and web applications.
• Support, participate in, and actively encourage Test-Driven Development (TDD) practices and pair programming to maintain code quality and knowledge sharing.
• Support code deployment by maintaining CI/CD pipelines.

What you'll need:

• Experience of front-end and back-end systems.
• Strong experience with TypeScript in production applications, with demonstrated ability to design scalable systems.
• Extensive experience developing applications using React.
• Proven experience mentoring engineers at various levels through code reviews, pair programming, TDD practices, and technical coaching.
• Experience in evaluating and adopting new technologies and practices.
• Experience with AWS (preferred), Azure or GCP.
• Strong experience using unit & E2E test frameworks (e.g. Jest, Playwright).
• Experience maintaining CI/CD pipelines to build and deploy code, working to platform standards.
• Kubernetes (Not required but beneficial).
• VoIP/WebRTC experience (Not required but highly beneficial).

What do we offer you?

• 25 days of annual leave, plus an extra day off for your birthday.
• A volunteer day to support a charity that matters to you.
• Enhanced maternity and paternity pay.
• Pension plan with contributions of up to 5.1% from Gamma.
• Group income protection and life assurance (four times your salary).
• Tax-efficient share save and share incentive plans.
• Private medical insurance through Vitality, which extends to your immediate family at an additional cost.
• Electric Vehicle scheme through Octopus and a Cycle to Work scheme.

A few things to note: Unfortunately, we can't offer visa sponsorship or relocation support for this role. If you feel you could be a good fit for Gamma but do not think that you meet all the requirements, we still encourage you to apply as you could be the person that we are looking for! Gamma is an equal-opportunity employer. We care about inclusion and believe in having diverse teams where everyone can be their true authentic selves. We value each person and their range of backgrounds and actively encourage people from underrepresented backgrounds to apply. We don't discriminate based on any protected characteristics e.g., race, colour, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, marital status, disability, or age. We are a family-friendly employer with a culture based on trust, autonomy, and flexibility to help you create a work-life balance and enjoy working here at Gamma.