Senior Software Engineer - GammaLabs in Newbury

A Bit About Us

At Gamma, we’re more than just a leader in Unified Communications as a Service (UCaaS). We’re a fast‑moving technology organisation delivering innovative voice, data, and mobile solutions across Europe. Our product and service portfolio is at the heart of what we do — powering reliable, scalable communications for thousands of businesses. Behind the scenes, our engineering teams design, build, and maintain the software systems that generate real business impact. We combine the agility of a start‑up mindset with the stability of a leading European business. Collaboration, ownership, and continuous improvement define how we work — and we’re always looking for people who want to build meaningful technology at scale.

Who are we looking for?

We are looking for a Senior Software Engineer to provide technical implementation of various systems which reside in the BSS/OSS space. You will be responsible for bringing technical considerations such as capacity, security, maintainability, and other non‑functional requirements into the designs of the team and lead aspects of design and planning of the software components within the larger project design.

What will you be doing day‑to‑day?

• Lead the agreed aspects of technical design, code implementation, code review and testing of any delivered components.
• Provide coaching and support to others in the Software Engineering team, regarding technologies and best practice.
• Support the Squad Lead in managing and enhancing the CI/CD capabilities of the squad.
• Participate actively in Agile ceremonies, project management efforts, and the establishment of best practices and tooling across the team.
• Work with internal stakeholders, from Product, Operations and beyond, to clarify and improve requirements.
• Ensure we are meeting our standards on cost control, configuration management, asset management and security.
• Create high quality technical documentation for other engineers and operational colleagues, to assist with future development, maintenance, operability, and disaster recovery of our systems, with a focus on business continuity.
• Ensure testing covers all aspects of delivery and manage any remediation plan.
• Identify, test and champion the adoption of emerging technologies.

What You’ll Need

We’re looking for someone with a strong technical foundation and a passion for building high‑quality, scalable software. You should be able to demonstrate:

• Proven, hands‑on experience working in a Java‑based development environment (Java 8 or above), with a solid understanding of core language features and ecosystem.
• Strong grasp of object‑oriented programming (OOP) principles and their practical application in real‑world systems.
• Significant experience writing and optimising SQL, with a good understanding of database design and performance considerations.
• Experience designing and developing RESTful APIs, with a focus on scalability, usability, and maintainability.
• Proficiency in using version control systems, ideally Git, within a collaborative development workflow.

You’ll Also Bring

• Demonstrable experience applying industry best practices in automated testing, using tools such as JUnit, Cucumber, or Selenium.
• Practical experience working with CI/CD pipelines, with an understanding of modern delivery practices and tooling.
• Experience working within Agile methodologies, contributing effectively to team ceremonies and iterative delivery.
• Familiarity with tools such as Jira (or similar) for task tracking and collaboration.

In Addition, It Would Be Valuable To Have

• Knowledge of public cloud platforms, ideally AWS, including experience building or deploying cloud‑native applications.
• Understanding of containerisation technologies (e.g. Docker) and orchestration platforms such as Kubernetes.

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. We also provide a volunteer day, allowing you to support a cause that matters to you. Family is important to us. With enhanced maternity and paternity pay, we support you at every stage of life. Our contributory pension scheme helps you plan for the future, with Gamma increasing contributions in line with yours. Your wellbeing comes first. We offer group income protection, life assurance (four times your salary), and private medical insurance through Vitality, which extends to your immediate family. We want you to share in our success, which is why we offer tax‑efficient share save and share incentive plans. We’re also committed to sustainability, offering an Electric Vehicle scheme through Octopus and a Cycle to Work scheme, making greener travel easier.

A few things to note

Unfortunately, we can’t offer visa sponsorship or relocation support for this role. This role is hybrid, with office and home working flexibility. If you feel you could be a great fit for Gamma but don’t meet every requirement, we still encourage you to apply — you might be exactly who we’re looking for. Gamma is an equal opportunity employer. We are committed to building inclusive, diverse teams where everyone can be their authentic selves. We welcome applications from all backgrounds and do not discriminate based on any protected characteristics.