At a Glance
- Tasks: Modernise core C#/SQL systems and build clean services with zero downtime.
- Company: Join Shieldpay, a forward-thinking tech company committed to equality.
- Benefits: Flexible hours, hybrid work, and a supportive work-life balance.
- Other info: Collaborate with innovative tech and enjoy excellent career growth opportunities.
- Why this job: Make a real impact by transforming legacy systems into modern solutions.
- Qualifications: Senior-level experience in modern .NET and familiarity with legacy frameworks.
The predicted salary is between 48000 - 50000 £ per year.
We are seeking a Senior Software Engineer who thrives on untangling complex systems and modernising core infrastructure without breaking production. This is an exciting opportunity to modernise core C#/SQL systems!
- Extract legacy business logic, build clean services, and verify changes in shadow mode with zero downtime to revenue flows.
- Extract business rules scattered across C#, embedded JavaScript and undocumented SQL stored procedures into a clean, tested, dependency-free rules assemblies.
- Build new services cleanly, with proper Dependency Injection (DI), robust authentication/authorization, structured logging, and full observability.
- Work fluently across both legacy .NET Framework 4.8 (ASP.NET MVC5, WebAPI 2, EF6) and modern .NET, as both will coexist for the whole transition period.
- Navigate across the multiple existing systems such as the API façade, the ETL pipeline, the SNS/SQS event bus, since neither system is self-sufficient and most real bugs live in the coupling, not one side.
- Deploy changes using shadow-mode verification (compute, log, and compare against legacy outcomes without writing) until equivalence is rigorously proven.
- Refactor and optimise heavy SQL Server stored procedures and backend logic with total precision ensuring client-money correctness is never compromised.
What we're looking for in you:
- Senior-level, hands-on experience in modern .NET (.NET 6+) paired with deep, comfortable familiarity with legacy .NET Framework 4.8 (ASP.NET MVC 5, WebAPI 2, Entity Framework 6).
- High proficiency in reading, understanding, and safely refactoring complex, stored-procedure-heavy database logic.
- Working proficiency in JavaScript/TypeScript, interacting with both jQuery on the legacy .NET front end and modern TypeScript microservices on our sister platform.
- A strong 'legacy technology' instinct over a 'rewrite everything' approach, favouring stability, predictability, and incremental progress over shiny trends.
- Experience or comfort with golden-master testing, diffing, and shadow verification to mathematically/logically prove equivalence to legacy outputs.
- The ability to hold two disparate architectures in your head at once and reason through their edge cases, data flows, and coupling points.
Nice-to-Haves:
- Hands-on experience with AWS Lambda, SQS, SNS, and RDS.
- Comfort operating alongside an in-house AI-agent orchestrator that supports and automates parts of our SDLC.
Our Promise: Shieldpay is an equal opportunities employer. For Shieldpay, building a fair and transparent workforce begins with the recruitment process that does not discriminate on the grounds of gender, sexual orientation, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age. We offer flexible working options, such as flexible hours and hybrid work, to support our employees' work-life balance.
Senior Software Engineer employer: Shieldpay
At Shieldpay, we pride ourselves on fostering a dynamic and inclusive work culture that empowers our employees to thrive. As a Strategic Payments Sales Leader, you will benefit from flexible working hours and a hybrid model that promotes work-life balance while engaging in meaningful client interactions across the UK. With ample opportunities for professional growth and a supportive team environment, Shieldpay is an excellent employer for those looking to make a significant impact in the payments industry.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Engineer
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Shieldpay or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Shieldpay.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Shieldpay.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Shieldpay that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Software Engineer
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Shieldpay.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Shieldpay and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Shieldpay
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Shieldpay uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
