Senior Software Engineer

Carbon 60, Inc.; Enfield; On-site; GBP 90,000 - 130,000; Full time

Job summary

Carbon 60, Inc. is seeking a Senior Software Engineer - C++ to take technical ownership of software designs from early specification through delivery. This hands-on role favors high-quality code, mentoring teammates, and influencing engineering outcomes.

You'll contribute to new product development and enhance existing systems, applying best practices across the full development lifecycle and collaborating with customers, suppliers, and colleagues.

Qualifications

• Proven experience with C++ (expert level)
• Strong understanding of the full software development lifecycle
• Clear, effective English communication, both written and spoken

Responsibilities

• Own software designs from specification to implementation, testing and verification
• Develop high-quality software for new products and enhancements
• Maintain and improve existing software to meet evolving needs
• Apply best-practice software engineering across the lifecycle
• Mentor and guide less experienced engineers
• Liaise with customers, suppliers and collaborators on software matters
• Contribute to wider project activities as required

Skills

C++

Software design

Full SDLC

Mentoring

English communication

Education

Degree in a relevant technical subject

Job description

Senior Software Engineer - C++

We're looking for a talented Senior Software Engineer to take technical ownership of software designs from early specification through to fully verified delivery. This is a senior, hands‑on role for someone who enjoys building high‑quality software, mentoring others, and influencing real engineering outcomes.

You'll bring expert knowledge of software design, test, and verification, contributing to both new product development and the ongoing enhancement of existing systems.

What You'll Be Doing

• Owning software designs from initial specification through implementation, testing, and verification
• Developing high‑quality software for new and innovative products
• Maintaining and enhancing existing software to meet evolving commercial and technical needs
• Applying best‑practice software engineering throughout the full development lifecycle
• Supporting and advising less experienced engineers, acting as a role model within the team
• Liaising technically with customers, suppliers, and collaborators on software‑related matters
• Contributing to wider project activities as required

What We're Looking For

• Excellent, proven experience with C++
• Strong understanding of the full software development lifecycle
• Confident user of Microsoft Visual Studio (2022 / 2026)
• Clear, effective communicator with strong written and verbal English
• Degree in a relevant technical subject

Nice to Have

• Experience with GUI/UX or Human-Computer Interaction (HCI)
• Knowledge of scripting languages such as Python or PowerShell
• Background working on complex or engineered products