At a Glance
- Tasks: Design and optimise high-precision C++ software for cutting-edge timing systems.
- Company: Join Hoptroff, a leading tech company 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 supportive team culture.
- Why this job: Make a real impact with your code in global financial systems.
- 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) in London employer: A
At Hoptroff, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters collaboration and innovation within our high-calibre engineering team. With competitive salaries, EMI share options, and private medical insurance, we ensure our employees are well taken care of while providing opportunities for professional growth in a thriving Shoreditch FinTech incubator. Join us to make a tangible impact in the world of precision timing systems, where your contributions will be valued and recognised.
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 meetups. A friendly chat can lead to opportunities that aren’t even advertised yet.
✨Tip Number 2
Show off your skills! Create a GitHub repo with some of your best C++ projects. This gives potential employers a taste of what you can do and how you think.
✨Tip Number 3
Prepare for those interviews! Brush up on your algorithms and data structures, and be ready to discuss your past projects. Practice coding challenges to keep your skills sharp.
✨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 seeing candidates who are proactive!
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!
Showcase Your Projects:Include specific examples of projects where you've written performance-sensitive code. If you've worked on Linux-based systems or have experience with C++20 features, let us know! This helps us understand your hands-on experience.
Be Clear and Concise:When writing your application, keep it clear and to the point. Use straightforward language to explain your technical skills and experiences. We appreciate clarity, especially when it comes to complex topics like software architecture.
Apply Through Our Website:Don’t forget to apply through our website! It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen on joining our team at Hoptroff!
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 are likely to come up in technical discussions. Be ready to demonstrate your understanding of performance-sensitive coding and how it applies to real-time systems.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples where you've tackled low-latency challenges or optimised performance in previous projects. Use the STAR method (Situation, Task, Action, Result) to structure your answers, making it clear how your contributions made a tangible impact.
✨Familiarise Yourself with Their Tech Stack
Research Hoptroff's products and the technologies they use, particularly around Linux-based systems and time synchronisation protocols like PTP or NTP. This will not only help you answer questions more effectively but also show your genuine interest in their work.
✨Prepare for Collaborative Discussions
Since you'll be working closely with a junior developer and other team members, be ready to discuss how you approach mentoring and knowledge sharing. Think of examples where you've helped others grow technically, and be prepared to explain complex concepts in simple terms.
