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 work, team events, and a vibrant Shoreditch community.
- Why this job: Make a real impact in finance and broadcasting with your coding skills.
- Qualifications: Extensive experience in modern C++ and strong debugging skills required.
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
Senior C++ Developer (Hybrid, UK-Based) employer: A
At Hoptroff, we pride ourselves on being an exceptional employer, offering a dynamic work environment in the heart of Shoreditch, London. Our hybrid working model promotes a healthy work-life balance, while our commitment to employee growth through modern tooling and continuous learning ensures that you will thrive as a Senior C++ Developer. Join us to make a tangible impact in the FinTech sector, where your contributions will be vital to the precision timing systems relied upon by major global players.
StudySmarter Expert Advice🤫
We think this is how you could land Senior C++ Developer (Hybrid, UK-Based)
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work with C++ or in similar roles. Attend meetups or online webinars to get your name out there and make some valuable contacts.
✨Tip Number 2
Show off your skills! Create a GitHub repository showcasing your C++ projects or contributions to open-source. 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. Practice coding challenges on platforms like LeetCode or HackerRank to sharpen your skills and boost your confidence.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who are proactive about their job search!
We think you need these skills to ace Senior C++ Developer (Hybrid, UK-Based)
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your experience with modern C++ and any relevant projects. We want to see how your skills align with the role, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to tell us why you’re the perfect fit for our team. Share your passion for low-latency systems and how your background makes you a great match for our exciting projects.
Showcase Your Technical Skills:Be specific about your experience with C++20 features and any performance optimisation techniques you've used. We love seeing concrete examples of how you've tackled challenges in your previous roles.
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 A
✨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 these will likely come up during technical discussions.
✨Demonstrate Your Problem-Solving Skills
Prepare to discuss specific examples of low-latency systems you've developed. Be ready to explain your design choices and how you tackled performance optimisation challenges.
✨Familiarise Yourself with Linux and Tools
Since the role involves working on Linux-based systems, ensure you’re comfortable with Linux networking concepts and tools like Git and CMake. Mention any relevant experience with automated testing frameworks too.
✨Communicate Clearly and Confidently
Practice explaining complex technical concepts in simple terms. You’ll need to communicate effectively with both engineers and non-engineers, so clarity is key. Think about how you can convey your ideas succinctly.
