Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and optimise high-precision C++ software for cutting-edge timing systems.
- Company: Join Hoptroff, a leader in nanosecond-accurate timing solutions.
- Benefits: Earn £80,000 - £100,000 plus EMI share options and private medical insurance.
- Other info: Enjoy hybrid working in a vibrant Shoreditch FinTech community.
- Why this job: Make a real impact on global financial systems with your coding skills.
- Qualifications: Extensive experience in modern C++ and strong debugging skills required.
Location: London
Salary: £80,000 - £100,000 + EMI Share Options + Private Medical Insurance
Vacancy Type: Full-time, Permanent
We take care of time, so our customers don’t have to. At Hoptroff, we build nanosecond-accurate, software-driven timing systems used by global investment banks, telecoms operators, and broadcasters - including the MiFID II-compliant trade timestamping that financial regulators depend on. When microseconds aren’t tight enough and milliseconds are an eternity, our software is what’s keeping the world in sync.
We’re entering an exciting phase of growth and looking for a Senior C++ Developer to join our small, high-calibre engineering team. You’ll write modern C++ (C++20 or later) at the heart of our Linux-based clock and time synchronisation platform - tight, performance-sensitive code where jitter is measured in nanoseconds and correctness is non-negotiable. You’ll own significant components of the platform, contribute to architecture, and work closely alongside a junior developer and a contractor on a tight, collaborative team.
The Role
Reporting to the Software Development Manager, you’ll lead the design, development, and optimisation of C++ software within our Linux-based timing systems. Day to day, you will:
- Design, build, and optimise low-latency, high-precision C++ at the heart of our timing products - code where performance, determinism, and jitter really matter
- Make architectural decisions on systems that have to be correct, fast, and observable in production - balancing maintainability with the hard real-time constraints of precision timing
- Develop online and offline tooling to support time synchronisation and system monitoring
- Build and maintain automated test cases using Python-based system test frameworks
- Provide senior-level technical input across product, QA, hardware, and commercial conversations
- Share knowledge, review code, and support the development of our junior C++ developer
- Help shape engineering standards, tooling, and processes
Essential Experience
- Extensive professional experience writing modern C++ in production - fluent in modern C++ idioms and confident with C++20/23 features such as concepts, ranges, coroutines, and constant expressions (constexpr/consteval)
- A track record of delivering low-latency, performance-sensitive systems on Linux - production code where determinism, throughput, and tail latency matter
- Strong computer science fundamentals: data structures, algorithms, concurrency, performance optimisation
- Demonstrable ability to design software architecture and make sound technical trade-offs
- Strong debugging and profiling skills (perf, valgrind, sanitizers, flame graphs) - you’ve cared about cache lines, lock contention, jitter, and tail latency, not just correctness
- Confident with Git, CI/CD pipelines, modern build tooling (CMake), and automated testing frameworks
- Clear technical communicator - you can explain trade-offs to engineers and non-engineers alike
Nice to Have
- Linux networking experience (sockets, networking concepts and standard tooling)
- Experience interacting with hardware on Linux (device drivers, system interfaces, low-level I/O)
- Low-level Windows systems development (Windows APIs, system services, platform-specific debugging)
- PostgreSQL or other relational database experience
- Python and/or Go (Golang) for tooling, automation, or supporting services
- Familiarity with time synchronisation protocols such as PTP or NTP
- Open-source contributions or evidence of staying current with the C++ standard
- Open to integrating AI tools where they add value
What We Offer
- Salary of £80,000 - £100,000, depending on experience
- EMI Share Options
- Private Medical Insurance
- Hybrid working - 2 days per week at our London (Shoreditch) office, with regular team events
- Based at a Shoreditch FinTech incubator - a thriving community of like-minded businesses with a full social calendar, networking opportunities, and (importantly) dog-friendly
- Your code will sit underneath MiFID II-compliant trade timestamps at major banks, broadcast sync at tier-1 broadcasters, and timing infrastructure at telecoms operators - tangible, high-stakes impact at global scale
- A team that invests in modern tooling and continuous learning
To Apply
If you feel you are a suitable candidate and would like to work for Hoptroff, please do not hesitate to apply.
Senior C++ Developer (Hybrid, UK-Based) in London employer: Hoptroff
Contact Detail:
Hoptroff Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior C++ Developer (Hybrid, UK-Based) in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry on LinkedIn or at tech meetups. A friendly chat can sometimes lead to job opportunities that aren’t even advertised.
✨Tip Number 2
Show off your skills! Create a GitHub repository with some of your best C++ projects. This gives potential employers a chance to see your coding style and problem-solving abilities in action.
✨Tip Number 3
Prepare for technical interviews by brushing up on your algorithms and data structures. Practise coding challenges on platforms like LeetCode or HackerRank to get into the groove.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love hearing from passionate candidates like you!
We think you need these skills to ace Senior C++ Developer (Hybrid, UK-Based) in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Senior C++ Developer role. Highlight your experience with modern C++ and any relevant projects that showcase your skills in low-latency systems. We want to see how your background aligns with what we do!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about timing systems and how your expertise can contribute to our team. Keep it concise but impactful – we love a good story!
Show Off Your Projects: If you've worked on any interesting projects, especially those involving C++ or Linux, make sure to mention them. We appreciate candidates who can demonstrate their hands-on experience and problem-solving skills through real-world examples.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it gives you a chance to explore more about what we do at Hoptroff!
How to prepare for a job interview at Hoptroff
✨Know Your C++ Inside Out
Make sure you're well-versed in modern C++ features, especially C++20 and beyond. Brush up on concepts, ranges, and coroutines, as you'll likely be asked to demonstrate your understanding of these during the interview.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples where you've tackled performance-sensitive issues or optimised low-latency systems. Be ready to explain your thought process and the trade-offs you made in your architectural decisions.
✨Familiarise Yourself with Linux and Debugging Tools
Since the role involves working on Linux-based systems, ensure you can talk confidently about your experience with debugging tools like perf and valgrind. Highlight any relevant projects where you've dealt with concurrency and performance optimisation.
✨Communicate Clearly and Collaboratively
Practice explaining complex technical concepts in simple terms. You'll need to communicate effectively with both engineers and non-engineers, so think about how you can convey your ideas clearly and concisely during the interview.