Senior Full Stack Developer

Gamma Recruitment Team; Manchester; On-site; GBP 60,000 - 80,000; Full time

Job summary

A forward-thinking telecommunications company in Manchester seeks a Senior Software Engineer to develop and maintain proprietary telecommunications solutions. You will build new features across the platform and mentor team members in an agile environment. Ideal candidates have extensive experience with TypeScript and React, and a strong ability to design scalable systems. The company offers competitive leave, enhanced parental pay, and private medical insurance. Join us to be part of a diverse team that values innovation and collaboration.

Benefits

25 days of annual leave

Enhanced maternity and paternity pay

Private medical insurance

Pension plan with contributions

Volunteer day

Electric Vehicle scheme

Qualifications

• Experience of front‑end and back‑end systems.
• Strong experience with TypeScript in production applications.
• Extensive experience developing applications using React.
• Proven experience mentoring engineers through code reviews.
• Experience maintaining CI/CD pipelines and platform standards.

Responsibilities

• Collaborate with product and engineering peers to scope and plan requirements.
• Evaluate trade‑offs between technical solutions.
• Develop new features and functionality across the platform.
• Integrate with third‑party services ensuring best practice.
• Produce Solution Design documents for implementation.

Skills

TypeScript

React

Mentoring

CI/CD Pipelines

AWS

Kubernetes

VoIP/WebRTC

Job description

At Gamma, we’re more than just a leader in Unified Communications as a Service (UCaaS) – we’re a dynamic, forward-thinking team revolutionizing 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.

We move fast with a start-up mindset, but we have the stability of a leading European business. 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 telecommunications 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. 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.

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
• 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?

At Gamma, we believe in work‑life balance, which is why we offer 25 days of annual leave, plus an extra day off for your birthday.

Giving back is important to us, so we also provide a volunteer day to support a charity that matters to you.

Family matters, too. With enhanced maternity and paternity pay, we’re here to support you as a parent and help you thrive in your career.

We care about your future, so our pension plan helps you save for the years ahead with contributions of up to 5.1% from Gamma, alongside your own contributions.

Your well‑being is our priority. We offer group income protection and life assurance (four times your salary) to ensure peace of mind for you and your loved ones.

We want you to share in our success. That’s why we offer tax‑efficient share save and share incentive plans, giving you the opportunity to benefit from Gamma’s growth.

We’re committed to health, both physical and mental, and provide private medical insurance through Vitality, which extends to your immediate family at an additional cost.

And, because we care about the environment, we offer an Electric Vehicle scheme through Octopus and a Cycle to Work scheme, making it easier to get around sustainably.

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 don’t 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.

For recruitment agencies – we have a network of fantastic partners that support us in our hiring from time to time. We’re not looking to increase that network currently, so please don’t send speculative CVs.

Senior Software Engineer / Senior Full Stack Developer / Senior Developer / Full Stack Engineer
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