Web Developer

develop; Greater London; Hybrid; GBP 80,000 - 95,000; Full time

Benefits offered by this job

Equity options

Up to 10% bonus

Remote working visits to London

Private healthcare

Pension and life assurance

Professional development

Enhanced annual leave

Job summary

develop is seeking a Senior Web Engineer with a strong blend of web development and security expertise. The role combines client-side engineering with security controls, including protection against tampering, unauthorised access, and automated interactions.

Occasional London visits support collaboration with security and product teams. The ideal candidate has extensive web development experience and some exposure to app security, cryptography, and secure communications.

Qualifications

• 5+ years of professional web development experience.
• Some experience with App Security, cryptography, secure communications and authentication.

Responsibilities

• Engineer defensive controls designed to safeguard software executing in untrusted client environments.
• Develop mechanisms that detect and respond to unauthorised modification, inspection, manipulation, and automated interaction.
• Identify weaknesses across client-side application architectures and turn security research into deployable engineering solutions.
• Work alongside software engineers, security specialists, offensive security teams, and product stakeholders to ensure defensive requirements are incorporated from initial design through production.
• Lead technical investigations into complex security issues, establishing underlying causes and engineering preventative solutions rather than short-term fixes.
• Influence architectural decisions around application security, resilience, performance, and client-side trust boundaries.
• Share specialist knowledge across the engineering organisation, helping teams adopt stronger approaches to secure software design and implementation.

Skills

Web development experience

App Security exposure

Cryptography

Secure communications

Authentication

Job description

Senior Web Engineer | Product Security | Remote, 1-2 times per month in London | Salary up to £95,000

I’m working with a high-growth technology business looking for a Senior Web Engineer to join the team. This is a highly technical role combining both Web Engineering and Security, for this role they are comfortable within finding a really strong Mobile Engineer who has some exposure to security, application protection, authentication, biometrics etc.

What you'll be doing:

• Engineer defensive controls designed to safeguard software executing in untrusted client environments.
• Develop mechanisms that detect and respond to unauthorised modification, inspection, manipulation, and automated interaction.
• Identify weaknesses across client-side application architectures and turn security research into deployable engineering solutions.
• Work alongside software engineers, security specialists, offensive security teams, and product stakeholders to ensure defensive requirements are incorporated from initial design through production.
• Lead technical investigations into complex security issues, establishing underlying causes and engineering preventative solutions rather than short-term fixes.
• Influence architectural decisions around application security, resilience, performance, and client-side trust boundaries.
• Share specialist knowledge across the engineering organisation, helping teams adopt stronger approaches to secure software design and implementation.

What they're looking for:

• 5+ years of professional web development experience.
• Some Experience with App Security, cryptography, secure communications and authentication.

Nice to have:

• WebAssembly (WASM) binary analysis
• Static and dynamic code analysis
• Anti-debugging, anti-tamper, and software protection techniques
• Runtime integrity verification and secure code signing
• Secure SDLC practices
• WebGPU, WebRTC, or WebCodecs
• Binary instrumentation and compiler toolchains
• SDK and developer platform development
• Biometrics, identity verification, or fraud prevention technologies
• Open-source security contributions or published security research

What's on offer:

• Up to £95,000
• Equity/share options
• Up to 10% bonus
• Remote Working- 1-2 a month in London
• Private healthcare and wellbeing benefits
• Pension and life assurance
• Professional development and training
• Enhanced annual leave and flexible benefits