At a Glance
- Tasks: Design and optimise high-precision C++ software for cutting-edge timing systems.
- Company: Join Hoptroff, a leading tech firm in the FinTech space.
- Benefits: Competitive salary, EMI share options, private medical insurance, and hybrid working.
- Other info: Work in a vibrant Shoreditch incubator with a dog-friendly culture.
- Why this job: Make a real impact with your code in global financial systems.
- Qualifications: Extensive C++ experience, strong debugging skills, and a passion for performance optimisation.
The predicted salary is between 80000 - 100000 € per year.
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) (Permanent) in London employer: Hoptroff
Hoptroff is an exceptional employer that fosters a collaborative and innovative work culture, where your contributions directly impact high-stakes timing systems used by global leaders in finance and broadcasting. With competitive salaries, EMI share options, and private medical insurance, we prioritise employee well-being and growth, offering opportunities to work with cutting-edge technology in a vibrant Shoreditch FinTech incubator surrounded by a supportive community. Join us to be part of a team that values continuous learning and modern tooling, ensuring your skills are always at the forefront of the industry.
StudySmarter Expert Advice🤫
We think this is how you could land Senior C++ Developer (Hybrid) (Permanent) in London
✨Tip Number 1
Network like a pro! Attend tech meetups, conferences, or even local coding events. You never know who you might bump into that could help you land that Senior C++ Developer role.
✨Tip Number 2
Show off your skills! Create a GitHub repository showcasing your C++ projects. This gives potential employers a taste of your coding style and problem-solving abilities.
✨Tip Number 3
Prepare for the interview like it’s a coding challenge! Brush up on your C++ fundamentals and be ready to discuss your past projects and architectural decisions in detail.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets noticed and shows you’re genuinely interested in joining our team at Hoptroff.
We think you need these skills to ace Senior C++ Developer (Hybrid) (Permanent) 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!
Show Off Your Projects:Include links to any projects or contributions you've made, especially those involving C++20 features or performance-sensitive applications. This gives us a glimpse of your coding style and problem-solving abilities.
Craft a Compelling Cover Letter:Your cover letter should reflect your passion for precision timing systems and your understanding of our industry. Share why you’re excited about the opportunity at Hoptroff and how you can contribute to our team.
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 don’t miss out on any important updates from our team!
How to prepare for a job interview at Hoptroff
✨Know Your C++ Inside Out
Make sure you brush up on modern C++ features, especially C++20 and beyond. Be ready to discuss concepts, ranges, and coroutines in detail, as well as how you've applied them in your previous projects.
✨Demonstrate Your Problem-Solving Skills
Prepare to showcase your debugging and profiling skills. Bring examples of how you've tackled performance issues in the past, focusing on low-latency systems and the trade-offs you've made to achieve optimal results.
✨Understand the Architecture
Familiarise yourself with architectural principles relevant to high-precision timing systems. Be prepared to discuss how you would approach designing software that balances performance and maintainability under real-time constraints.
✨Communicate Clearly and Confidently
Practice explaining complex technical concepts in simple terms. You'll need to convey your ideas effectively to both engineers and non-engineers, so think about how you can articulate your thought process during the interview.
