Senior Software Engineer

A Bit About Us

At Gamma we provide voice, data, and mobile solutions to businesses across the UK, Germany, Spain, and the Benelux region. Our people are at the heart of everything we do; when you join us you become part of a collaborative, forward‑thinking team that’s transforming how businesses connect and communicate globally.

As a Senior Software Engineer you will design, build, and maintain systems within the BSS/OSS space, ensuring software is robust, scalable, and secure, and contributing to the design and planning of key components within larger platform initiatives.

• Lead key aspects of technical design, development, code review, and testing for delivered components.
• Support and coach engineers on technologies, standards, and best practices.
• Enhance CI/CD pipelines and engineering practices within the squad.
• Participate in Agile ceremonies and support project delivery and continuous improvement initiatives.
• Collaborate with Product, Operations, and other stakeholders to refine and improve requirements.
• Ensure systems meet standards across cost control, security, configuration, and asset management.
• Create clear technical documentation to support maintainability, operability, and business continuity.
• Drive quality through robust testing strategies and identify opportunities to adopt new technologies.

• Strong hands‑on experience with Java (Java 8+) and solid understanding of object‑oriented programming principles.
• Experience designing and building RESTful APIs with a focus on scalability and maintainability.
• Strong SQL and database design experience, with performance optimisation knowledge.
• Experience using version control systems (ideally Git) within collaborative environments.
• Knowledge of automated testing frameworks (e.g., JUnit, Cucumber, Selenium) and CI/CD practices.
• Experience working in Agile teams and using tools such as Jira.
• Familiarity with AWS and cloud‑native development (desirable).
• Understanding of containerisation technologies (e.g., Docker, Kubernetes) (desirable).

• 25 days annual leave + birthday.
• Subsidised private medical insurance.
• 5.1% matched pension contributions.
• Enhanced parental leave.
• Life assurance and Income protection.
• Share save and incentive plans.
• Electric Vehicle and Cycle scheme.
• Employee discounts.
• Volunteer day.

We require all candidates to be eligible to work in the UK and pass a basic DBS check. Unfortunately, we are not able to offer visa sponsorship or relocation support for this role. This role is hybrid, with a mix of office and home working.

Gamma is an equal‑opportunity employer committed to building diverse, inclusive teams where everyone feels valued and can be their authentic selves. We welcome applicants from all backgrounds, especially those underrepresented in our industry.