Senior C++ Software Developer

🔒 Confidential Employer
Posted 24 April 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£300,000 / year
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

C++ FPGA Low-level systems Performance tuning Database Rust Erlang

FULL DESCRIPTION

Role: Senior C++ Software Engineer

An [Employer hidden — view at passion-project.co.uk] is looking for a top-tier C++ Engineer to join their team! Known for breaking records in the tech space, they are comprised of exceptional technologists who are passionate about exploring the limits of what technology can accomplish. This is an opportunity to work with some of the most advanced infrastructure on the planet, processing billions of data points every second.

Key responsibilities include:

  • Designing and building a high-performance database from the ground up to support massive data scales.
  • Optimizing systems at the hardware level, including gaining hands-on experience with FPGA cards and low-latency tuning.
  • Leading R&D projects in functional programming, utilizing languages such as Rust, Erlang, or custom-built alternatives.
  • Developing infrastructure for machine learning and refining research models for peak real-world performance.
  • Collaborating with elite engineers to maintain engineering excellence in a mission-critical, fault-tolerant environment.

Requirements

  • Technical Skills: A strong background in modern C++ development with a focus on low-level systems and performance tuning.
  • Education: Outstanding academic credentials from a leading institution.
  • Experience: Proven track record in environments where speed, efficiency, and fault tolerance are mission-critical.
  • Mindset: A passion for exploring the limits of technology and a proactive approach to research and development.

What’s on Offer

  • Elite Compensation: Up to £300k total first-year compensation package.
  • Cutting-Edge Tech: Direct exposure to hardware optimization, FPGA, and advanced functional programming languages.
  • Technical Ownership: The chance to build mission-critical systems and proprietary databases from scratch.
  • High-Caliber Team: Work alongside some of the best technologists in the world in a tech-first environment.

If you are a Senior C++ Software Engineer looking to push the boundaries of performance and systems engineering, please apply with an up-to-date CV to be considered.

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