Founding Engineer | Cybersecurity

Oho Group Ltd; Greater London; On-site; GBP 105,000 - 170,000; Full time

Benefits offered by this job

Competitive salary

Meaningful equity

Clear progression paths

Job summary

A Series A cyber security startup in Greater London is seeking a Founding / Early Engineer to help scale and influence their core product. The ideal candidate will have over 5 years of commercial software engineering experience, a strong understanding of system design, and an ability to adapt across different programming languages. The role offers competitive salary and equity, the opportunity to influence technical strategy, and clear paths for career progression within a well-backed company.

Qualifications

• 5+ years of commercial software engineering experience.
• Strong fundamentals in system design and software architecture.
• Experience in high-bar teams or fast-growing startups.
• Language-agnostic mindset (Python, Go, Rust, Java, C++, TypeScript welcomed).
• Comfortable moving from hands-on delivery to technical ownership.

Responsibilities

• Build and scale core backend and platform systems.
• Contribute to architectural decisions as the product grows.
• Work closely with product and leadership on technical strategy.
• Help establish best practices around quality, security, and scalability.
• Mentor and raise the bar as the team expands.

Skills

Commercial software engineering experience

System design

Software architecture

Language-agnostic mindset

Mentoring

Go

Rust

Java

C++

TypeScript

Job description

Series A Cyber Security Startup | Well-Funded | Elite Team

We’re working with a Series A cyber security startup tackling genuinely hard problems in a critical, fast-growing market. The company has moved beyond idea-stage, has real traction, real customers, and serious momentum — now they’re scaling the engineering team with exceptional builders.

This is a Founding / Early Engineer role where you’ll help take a strong core product from early traction → real scale.

Why this stands out

• Elite engineering DNA – team includes engineers from Meta, Tessian, and top-tier security companies
• Proven founders – previous successful exit, now building with clarity and pace
• Strong Series A backing – significant VC funding, long runway, clear growth plan
• Real impact – you’ll influence architecture, hiring, and engineering culture as the team scales
• Serious problems – modern cyber security challenges involving scale, reliability, and adversarial systems

The role

• Build and scale core backend and platform systems
• Contribute to architectural decisions as the product and customer base grow
• Work closely with product and leadership on technical strategy
• Help establish best practices around quality, security, and scalability
• Mentor and raise the bar as the team expands

What they’re looking for

• 5+ years commercial software engineering experience
• Strong fundamentals across system design and software architecture
• Experience in high-bar teams or fast-growing startups
• Language-agnostic mindset (Python, Go, Rust, Java, C++, TypeScript all welcome)
• Comfortable moving from hands-on delivery to higher-level technical ownership

The upside

• Competitive salary + meaningful equity
• Stability of a Series A business with the influence of an early hire
• Learn from exceptional engineers and founders who’ve done this before
• Clear progression into Staff / Principal / Tech Lead paths as the company scales

This is ideal for engineers who want ownership without chaos — still early, still impactful, but with real backing and direction.