Senior Software Engineer - GammaLabs

Gamma; Newbury; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

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

Job summary

Gamma in the United Kingdom is seeking a Senior Software Engineer to design, build, and maintain systems in the BSS/OSS space. You’ll contribute to scalable, secure software and guide non-functional requirements across the squad.

You’ll lead design, develop RESTful APIs, optimise SQL, and advance CI/CD, testing, and documentation while collaborating with Product, Operations, and other stakeholders in a hybrid office/remote setup.

Qualifications

• Hands-on Java 8+ with OO design principles.
• Experience building RESTful APIs at scale.
• Strong SQL and DB design; performance focus.

Responsibilities

• Lead design, development, code reviews and testing of components.
• Coach engineers on tech standards and best practices.
• Enhance CI/CD pipelines and engineering practices.
• Support Agile ceremonies and project delivery.
• Collaborate with Product, Ops to refine requirements.
• Ensure security, cost control, configuration and asset management.
• Create clear technical documentation.
• Drive quality via robust testing strategies.

Skills

Java 8+

RESTful APIs

SQL

Git

Testing frameworks

Agile

Tools

AWS

Docker

Kubernetes

CI/CD

Jira

Job description

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’ll be part of a collaborative, forward‑thinking team that’s transforming how businesses connect and communicate globally. We’re growing fast, but we never lose sight of what matters: our people. Whether you're looking to develop your skills, take on new challenges, or make a meaningful impact, Gamma is the place to do it.

What is the role responsible for?

As a Senior Software Engineer, you will be responsible for designing, building, and maintaining systems within the BSS/OSS space. This role exists to bring strong technical expertise into the team, ensuring software is robust, scalable, and secure, while contributing to the design and planning of key components within larger platform initiatives. You’ll play a key role in shaping solutions, embedding non‑functional requirements such as performance, maintainability, and security, while supporting the wider engineering team through best practice and technical guidance.

What will you be doing day‑to‑day?

• Leading key aspects of technical design, development, code review, and testing for delivered components
• Supporting and coaching engineers within the team on technologies, standards, and best practices
• Contributing to and enhancing CI/CD pipelines and engineering practices within the squad
• Participating in Agile ceremonies and supporting project delivery and continuous improvement initiatives
• Collaborating with Product, Operations, and other stakeholders to refine and improve requirements
• Ensuring systems meet standards across cost control, security, configuration, and asset management
• Creating clear technical documentation to support maintainability, operability, and business continuity
• Driving quality through robust testing strategies and identifying opportunities to adopt new technologies

What You’ll Bring

• Strong hands‑on experience with Java (Java 8+) and a 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)

What do we offer you?

• 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

A few things to note

We require all candidates to be eligible to work in the UK and pass a basic DBS check. Unfortunately, we’re unable 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. As a family‑friendly employer, we foster a culture of trust, autonomy, and flexibility to support your work‑life balance and help you thrive at Gamma.