Software Engineer | Start-Up

Oho Group; Greater London; On-site; GBP 70,000 - 120,000; Full time

Benefits offered by this job

Equity

Autonomy

Impactful projects

Job summary

Oho Group is seeking a Software Engineer in London to join an early-stage defence start-up building mission-critical systems with end-to-end ownership. You’ll work across backend, infrastructure, data, and automation, writing code in Python, TypeScript, Rust, Go, Java, or C++.

With 4+ years of professional experience, you’ll tackle challenging engineering problems, enjoy high autonomy, and have a real-world impact in defence and security tech.

Qualifications

• 4+ years of professional software development experience.
• Proficient in Python, TypeScript, Rust, Go, Java, or C++.
• A generalist capable across backend, infrastructure, data and automation.
• Thrives in fast-paced, high-autonomy environments.
• Interest in defence, aerospace, or national security tech; start-up experience a plus.
• Experience in robotics, embedded systems, ML, or real-time systems.

Responsibilities

• Own end-to-end ownership of mission-critical systems.
• Collaborate across a small engineering team to design, build and deploy core technology.
• Drive impactful, real-world outcomes in defence and security tech.

Job description

Software Engineer | Defence Start-Up | London

Software Engineer required for an early-stage defence technology start-up building mission-critical systems with real-world impact. You’ll join a small, high-calibre engineering team designing, building, and deploying core technology. This is a deeply hands-on role for someone who wants significant ownership, technical depth, and end-to-end responsibility over the systems they build.

You are 4+ years of professional Software Development experience

• Proficient in Python, TypeScript, Rust, Go, Java, or C++
• A true generalist - comfortable working across backend, infrastructure, data, and automation
• Most effective in fast-paced, high-autonomy environments
• Motivated by building technology with real-world impact
• Interested in defence, aerospace, or national security technology
• Nice to have Early-stage start-up experience
• Experience in robotics, embedded systems, ML, or real-time systems

Why Join?

• Competitive salary + meaningful equity
• Significant influence over product and technical direction
• Work on challenging engineering problems with genuine real-world impact
• Build mission-critical technology within the defence sector
• Join a small, world-class team with significant autonomy and trust