About the opportunity
We are looking for an experienced Software Engineer to join our team working on a well-established payments and subscription platform built primarily around the Microsoft technology stack.
Reporting into the Engineering Manager, you'll work across the full SDLC covering new feature development, operational support, automated testing, troubleshooting, platform modernisation and stability.
You’ll work in an environment that blends established systems with active modernisation efforts, giving you real influence over architecture, engineering practices, platform direction, and overall software quality. There are strong opportunities for technical growth, with hands-on involvement in solution design, modernisation initiatives, and evolving engineering standards.
Some of the other responsibilities include:
- Develop, maintain, and enhance applications built using the Microsoft stack.
- Work across a mixture of modern and legacy components within an established product environment.
- Investigate, troubleshoot, and resolve application defects and production issues.
- Perform root cause analysis on recurring issues and implement sustainable long-term improvements.
- Identify opportunities for incremental modernisation and technical improvement.
- Contribute to modernisation initiatives, including architectural improvements, service decomposition, platform scalability, and engineering process enhancements.
- Support and maintain SQL Server databases, queries, and stored procedures.
- Develop and maintain APIs and backend services using .NET / .NET Core and C#.
- Contribute to frontend development using Angular.
- Participate in code reviews and collaborative development practices.
- Contribute to technical decision-making, engineering standards, and continuous improvement initiatives.
- Design, clearly document, and review scalable technical solutions aligned to business and technical requirements.
- Support CI/CD pipelines and cloud-hosted environments within AWS.
- Contribute to testing activities, including automated testing and quality-focused development practices.
- Participate in an out-of-hours on-call rota supporting priority incidents where required.
- Work collaboratively with technical and non-technical stakeholders to deliver reliable business solutions.
- Contribute actively to team capability growth.
This role is fully remote across the UK, with occasional meet-ups at our Newcastle office. You must have full working rights.
What would make you a good candidate?
We are looking for a dependable, well-rounded developer with strong problem-solving skills, a pragmatic mindset, and the confidence to contribute to technical direction, platform modernisation, and engineering quality.
Required Technical Skills & Experience :
Core technology stack
- Strong commercial software engineering experience, ideally with at least two years of hands-on experience using C#.
- Experience with .NET / .NET Core.
- Experience working with SQL Server, including writing and optimising queries and database objects.
- Frontend development experience with Angular.
- Experience supporting and enhancing established enterprise applications.
- Comfortable working across a mix of modern and legacy environments.
- Good understanding of API development and backend services.
- Experience with scalable distributed systems and service-oriented architectures.
Modern software engineering and architecture
- Strong understanding of modern software engineering principles and architectural patterns.
- Experience or strong understanding of Domain-Driven Design (DDD).
- Experience with microservices architecture, event-driven systems, and distributed systems design.
Solution design and architecture
- Ability to design, clearly document, and review scalable solution designs aligned to technical initiatives and business requirements.
- Experience contributing to architectural discussions and driving pragmatic technical improvements across existing platforms.
- Ability to balance short-term operational priorities with long-term maintainability, scalability, and modernisation goals.
Cloud and DevOps
- Experience working with AWS environments and services.
- Familiarity with CI/CD pipelines and deployment processes.
- Understanding of cloud-based application hosting and operational support.
Testing and quality
We are moving towards a model where developers take greater ownership of software quality, so experience or interest in the following would be highly beneficial:
- Unit testing.
- System and integration testing.
- Performance testing.
- Security testing.
- Test automation frameworks and practices.
- Experience embedding QA practices into the development lifecycle.
Communication and collaboration
- Strong verbal and written communication skills, with the ability to proactively raise risks, blockers, and concerns.
- Confidence contributing to technical discussions and collaborating with engineers, product stakeholders, support teams, and business users.
- Comfortable working across both technical and non-technical conversations.
AI-assisted development
We are beginning a broader move towards AI-centric development practices and are interested in candidates who are open to working in this space.
Useful experience includes:
- Use of AI-assisted coding tools such as Claude or similar platforms.
- Experience working within teams adopting AI-assisted development workflows.
- Strong interest in using AI tools and practices to improve engineering productivity, software quality, delivery efficiency, and code and library modernisation.
The ideal candidate will also:
- Be comfortable contributing ideas and influencing technical direction within the team.
- Balance platform enhancement and modernisation initiatives with operational support responsibilities.
- Enjoy solving complex technical problems and addressing root causes rather than applying short-term fixes.
- Take a pragmatic approach to modernisation, engineering quality, and architectural evolution.
- Be interested in improving engineering practices, scalability, maintainability, and developer experience over time.
- Be open-minded about new technologies and evolving development practices.
- Be comfortable working independently and taking ownership where required.
- Communicate clearly and work collaboratively within a team environment.
- Maintain a positive, professional attitude and a good sense of humour.
Desirable Experience
- Experience modernising legacy applications.
- Experience designing or implementing microservices, distributed systems, or event-driven architectures.
- Experience with monitoring and observability tooling.
- Familiarity with Agile delivery environments.
- Exposure to secure development practices and DevSecOps approaches.
- Experience contributing to architectural roadmaps or modernisation strategies.
- Exposure to AI-assisted engineering workflows and modern software delivery practices.
- Experience acting as a technical lead, informal mentor, or subject matter expert within engineering teams.
At Xplor, we believe the best innovation and ideas happen at the intersections of our differences — across cultures, generations, disciplines, and lived experiences. So even if you do not tick every box, we still encourage you to apply.
Values and Life at Xplor
Our five core values guide us from how we hire and recognise our team members to how we interact with our customers day to day:
- Find a better way
- Do the right thing
- Say it straight
- Win together
- Own the outcome
If these values sound like you, and describe people you want to work with, you will thrive at Xplor.
As an Xplorer, you will be part of a global network of talented colleagues who will support your success. We look for commonalities and shared passions and give people the tools they need to deliver great work and grow at speed.
Some of our perks and benefits are:
- Paid Parental Leave benefit programs
- #GiveBackDays/Commitment to social impact – 3 extra days off to volunteer and give back to your local community
- Ongoing dedication to Diversity & Inclusion initiatives such as D&I Council, Global Mentorship Program
- Access to free mental health support
- Flexible working arrangements
Ready to apply?
To start your application, please submit your resume, and we will be in touch as soon as we can. Please include the word "moonshot" at the top of your message to the Hiring Manager so that we know you took the time to read our job ad.
We understand that diverse candidates have diverse needs. We welcome you to inform us of any additional needs related to completing your job application or participating in the interview process, via [email protected].
More about us
More than 130,000 businesses in 72+ countries rely on Xplor to run their day and get paid, processing over $47 billion in payments annually. Our connected ecosystem helps operators spend less time managing complexity and more time delivering the experiences that matter most.
Xplor is backed by world-class investors Advent International, Battery Ventures, and Silver Lake.
Good to know
To be considered for employment, you must be legally authorised to work in the location (country) you're applying for. Xplor does not sponsor visas, either at the time of hire or at any later time.
We kindly ask you to apply through our careers portal or external job boards only. Please don't send your application via email.
To learn more about us and our products, please visit .
We also invite you to check out our Candidate FAQs for more information about our recruitment process .
EEO and Artificial Intelligence
We believe in transparent hiring. We use an applicant tracking system that includes artificial intelligence enabled features to assist with the screening and assessment of job applications, such as candidate scoring or ranking. These tools support our recruitment process, but all hiring decisions are made by our recruitment team following human review. We do not rely on artificial intelligence to make final hiring decisions. Find our Candidate AI Usage guidelines here.
Xplor is dedicated to attracting, retaining and developing our people regardless of gender identity, ethnicity, sexual orientation, disability and age. Applications are encouraged from all sectors of the community.
We make it a priority to respond to every applicant.