Senior Backend Engineer x2 (C#) Product Engineering Southampton

Who are Benifex?

We are a fast-moving technology company, and one of the most successful providers of online reward and benefits solutions in the UK. We believe no one comes to work to do a bad job or be actively disengaged, and that technology is instrumental in providing an exceptional employee experience. We are striving to create seamless but tangible interactions between employers and employees, making work a rewarding place for every single one of us. To help us on our quest to be the best, we need brilliant people on board and that's where you come in.

Why should you apply?

• Career Progression: Opportunity to lead the modernisation of a flagship product, gaining experience with cutting-edge technologies and architectural practices.
• Impact: Play a critical role in transforming a core product used by thousands of businesses and employees globally.
• Challenge: Solve complex technical problems, implement modern architecture, and collaborate across diverse teams.
• Top 10 Employer, Sunday Times Best Places to Work Awards.
• Work for a profitable, fast-growing market leader in the online reward and benefits space.

Please note we are unable to offer visa sponsorship and require people to be based in the UK or Ireland for this position.

Great benefits:
£75,000-90,000
Tech setup of your choice (MacBook Pro or equivalent, monitors, etc.)
£/€800 annual learning budget, plus two hours per week as 'Focus Fridays'.
Flexible work - choose a working setup that works for you, our only ask is to see you once a quarter in our UK HQ.
25 days holiday plus your local bank holidays.
Your birthday off.
Two half-day wellbeing days.
Healthcare cash plan to cover the costs of day-to-day healthcare.
Employee Assistance Plan 24/7 365 support.
Income Protection (75%) and life assurance (4x salary).
Pension scheme.
Enhanced parental leave package - 26 weeks fully paid maternity leave and 4 weeks fully paid paternity leave.
£50 monthly allowance to spend on whatever takes your fancy, your very own Benefex card will be topped up at the start of each month!

Role Overview

We're hiring for 2x Senior Backend Engineer with a focus on C#.NET to help build and modernise our Benefits platform. This is an exciting opportunity to drive the evolution of a key product by implementing cutting-edge technology, refining technical best practices, and fostering collaboration across global teams.

Responsibilities

• Lead the design and development of modern, scalable backend solutions for our Benefits product using C#.NET and .NET Core.
• Collaborate closely with Product and Engineering teams to define technical requirements, ensure high-quality delivery, and drive architectural decisions.
• Modernise existing systems by introducing microservices, containerisation (Kubernetes), and cloud-native practices.
• Implement and maintain CI/CD pipelines to ensure seamless deployment and delivery processes.
• Advocate for and implement best practices in coding, architecture, and process, ensuring a high standard of technical excellence.
• Work effectively with remote teams to deliver cohesive and robust solutions.
• Collaborate with engineers from Java Spring Boot backgrounds to ensure seamless integration and knowledge sharing.

What are we looking for?

• Extensive experience in backend development with C#.NET and .NET Core, with a focus on scalable, maintainable solutions.
• Proven knowledge of Kubernetes and containerisation to support modern infrastructure practices.
• Experience with modern architectural patterns, including microservices and event-driven systems.
• Hands-on experience with messaging systems like Pub/Sub, distributed transaction coordination (MSDTC), and caching solutions like Redis.
• Proven ability to set up and maintain CI/CD pipelines to streamline development and deployment workflows.
• Solid understanding of system performance, optimisation, and debugging.
• Collaboration: Ability to work effectively with cross-functional and remote teams, including Java Spring Boot engineers, to deliver cohesive solutions.
• Proactive Problem-Solving: A resourceful approach to tackling complex challenges and driving projects forward with minimal guidance.
• Technical Excellence: A strong advocate for clean code, best practices, and high-quality software development.

Bonus Points for:

• Experience with cloud technologies, particularly in deploying and scaling .NET applications.
• Familiarity with observability tools for monitoring, logging, and alerting (e.g., Grafana, Prometheus).
• Knowledge of IaC tools such as Terraform.
• Previous experience modernising legacy systems or transitioning monolithic architectures to microservices.

Even if you don't meet all of the requirements for this role, we encourage you to apply! We are looking for talented and passionate individuals who are eager to learn and grow. We also offer a variety of other roles, so please check out our careers page to see if there is something else that might be a good fit for you.

Our interview process

Benefex understands the need to have a fast and efficient process; the below will all be completed in the shortest time possible, typically a 2-2.5 week timeframe.

1. Initial informal call with the Talent team.
2. Interview with our Engineering Director 30-45 min.
3. Technical Task.
4. Technical Interview - 60 min.
5. Final interview with VP of Engineering - 30-45 min.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

We are committed to creating a diverse and inclusive workplace where everyone feels welcome and respected. We believe that diversity and inclusion are essential to our success, and we are proud to be an equal opportunity employer.

We are a proud member of the Disability Confident employer scheme.

If you require any reasonable adjustments at any stage during the recruitment process, please let us know with your application.