At a Glance
- Tasks: Build and enhance C#/.NET applications and contribute to technical design and team collaboration.
- Company: Join a diverse and inclusive tech company committed to equality and innovation.
- Benefits: Flexible work arrangements, mentoring, and opportunities for professional growth.
- Other info: Dynamic environment with opportunities for career advancement and meaningful technical ownership.
- Why this job: Make a real impact on business-critical platforms with modern engineering practices.
- Qualifications: Strong experience in C#/.NET development and familiarity with SQL Server and REST APIs.
The predicted salary is between 63000 - 77000 £ per year.
Diversity, Equity, and Inclusion are fundamental to our culture, and Synechron is proud to be an equal opportunity workplace and an affirmative-action employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We strongly believe that a diverse workforce helps build stronger, successful businesses as a global company. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We empower our global workforce by offering flexible workplace arrangements, mentoring, internal mobility, learning and development programs, and more. All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.
We are looking for a high-calibre Senior C#/.NET Engineer / Development Lead to join a fast-paced enterprise technology environment supporting Risk, Product Control and ESG IT. This role is ideal for a strong hands-on .NET professional who can deliver high-quality software while contributing to technical design, platform enhancement and team collaboration. Depending on experience, the role can suit either a senior individual contributor or a technical lead with broader delivery oversight.
You will work across new product onboarding, methodology change, platform enhancement, production support improvement and selected greenfield initiatives, helping to modernise services and drive reliable, scalable solutions.
What You’ll Do:
- Build and enhance C# / .NET applications, REST APIs, batch services and reusable platform components
- Contribute to technical analysis, solution design, development and code reviews
- Deliver change across the Asterisk ecosystem, including shared libraries, templates, orchestration, configuration and operational dashboards
- Design and optimise integrations across MongoDB, SQL Server / data warehouse, enterprise data sources, REST APIs and messaging platforms such as ActiveMQ
- Support migration from Windows-hosted services to OpenShift, including containerisation, service modernisation and technical debt reduction
- Write clean, maintainable and testable code aligned to SOLID principles and engineering best practices
- Contribute to unit, integration and regression testing, release readiness, UAT support, cutover and early-life support
- Collaborate with developers, leads, delivery managers, support teams and business stakeholders to deliver controlled, production-ready solutions
- Use AI-assisted development tools responsibly to improve coding productivity, test generation, refactoring, documentation and code review quality
What We’re Looking For:
- Strong hands-on experience in C# / .NET development within enterprise or production-facing systems
- Good knowledge of .NET Framework, .NET Core / modern .NET, OOP, design patterns and SOLID principles
- Strong experience with SQL Server, query optimisation, data integration and database-driven applications
- Experience with MongoDB or similar document databases
- Experience building REST APIs, integrations and message-driven services
- Familiarity with ActiveMQ or equivalent messaging platforms
- Practical experience with Git / Bitbucket, Bamboo or similar CI/CD tools, JIRA and NuGet
- Exposure to OpenShift, Kubernetes or Docker is highly desirable
- Experience in financial services, Risk IT, Product Control IT, ESG IT or regulated environments is a plus
- Comfortable working in a controlled SDLC environment with strong focus on resilience, auditability and supportability
Why Apply?
This is an opportunity to work on business-critical platforms in a role that blends modern engineering, enterprise scale and meaningful technical ownership. You’ll be part of a team driving real change across strategic systems while working with a strong technology stack and modern delivery practices.
Senior C#/.NET Engineer employer: Synechron
Synechron is an exceptional employer that prioritises employee growth and development within a dynamic financial services environment. With a strong commitment to diversity, equity, and inclusion, the company fosters a collaborative culture where innovative ideas thrive, and employees are empowered to take on meaningful challenges. Located in the heart of London, Synechron offers flexible workplace arrangements and opportunities for mentoring and internal mobility, making it an ideal place for professionals looking to advance their careers while contributing to impactful projects.
StudySmarter Expert Advice🤫
We think this is how you could land Senior C#/.NET 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 Synechron 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 Synechron.
✨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 Synechron.
✨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 Synechron 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 C#/.NET 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 Synechron.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Synechron 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 Synechron
✨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 Synechron 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.
