Job Description

Staff / Principal Software Engineer
Hybrid - Cambridge HQ | UK Remote-Friendly | Circa 110k+
A leading provider of global payment and data solutions is looking for a Staff or Principal Software Engineer to join their high-performing engineering team. This is a unique opportunity to take a senior role in shaping the architecture and technical direction of a platform that supports billions of transactions worldwide.
The ideal candidate will bring deep backend engineering expertise, particularly within the JVM ecosystem (Java, Kotlin, or Go), although experienced engineers from a Microsoft stack background (C#/.Net) will also be considered.
Key Responsibilities:

• Lead the design and development of scalable, distributed systems handling high volumes of global traffic.
• Define and influence long-term technical strategy across engineering teams.
• Collaborate with stakeholders to deliver reliable, high-performance backend services.
• Champion engineering best practices around code quality, testing, and CI/CD.
• Mentor and support the growth of other engineers in the team.

Candidate Profile:

• Proven experience building and scaling backend systems in production environments.
• Deep knowledge of the JVM stack (Java, Kotlin, Go), or strong C#/.Net experience with a willingness to adapt.
• Experience leading technical design and architecture in cross-functional teams.
• Comfortable working in fast-paced, product-driven environments.
• Strong communication skills and a collaborative mindset.

What's on Offer:

• Flexible hybrid working with access to a Cambridge-based HQ.
• UK-wide remote flexibility for the right candidate.
• Competitive compensation - starting around 110k+ depending on experience.
• A high-impact, technically challenging role in a company building for global scale.

Certus Recruitment Group is a well-established and experienced specialist consultancy providing sales, marketing, and IT recruitment services. We serve the technology sector across the UK, Europe, North America, and Australia.
If you are ready to take your career to the next level and make a significant impact, apply now!