Senior Web Security Engineer
iProov provides science-based biometric solutions that enable the world’s most security-conscious organizations to streamline secure remote onboarding and authentication for digital and physical access. Our award-winning liveness technology and iSOC offer unmatched resilience against deepfakes and generative AI threats while ensuring effortless, scalable user experiences. Trusted by leading governments and enterprises, including the U.S. Department of Homeland Security, U.K. Home Office, GovTech Singapore, ING, and UBS, iProov sets the standard in biometric identity assurance.
This global trust is built not only on our technology but on the strength of the people behind it. For us, diversity at iProov is about reflecting the customers we serve, holding the principles of equality and inclusion at the heart of everything we do and all that we stand for, embracing differences, creating possibilities, and growing together. We aim to foster a culture where individuals of all backgrounds feel confident in bringing their whole selves to work, feel included, and their talents are nurtured, empowering them to contribute fully to our purpose.
The Role
Reports to: Head of Red Team
Location: UK (Flexible)
Comp: Negotiable (Base) + Company Performance Bonus (10%) + Share Options + UK iProov Benefits
We're looking for an experienced Senior Web Security Engineer to design, build, and secure high-performance web applications that run in some of the world's most demanding environments.
In this role, you'll work at the intersection of browser security, JavaScript runtimes, WebAssembly, anti-reverse engineering, and application hardening. You'll help protect client-side applications against tampering, reverse engineering, and sophisticated attacks while developing highly optimized code that performs consistently across modern browsers and devices.
This is a hands-on engineering position for someone who enjoys solving difficult technical problems, understands the realities of client-side security, and is passionate about pushing the boundaries of what's possible in the browser.
You'll work on technically challenging problems that few engineering teams tackle—protecting sophisticated client-side applications in hostile environments. You'll collaborate with experts in browser technology, security, cryptography, and systems engineering while building solutions used at global scale.
If you're passionate about JavaScript internals, WebAssembly, browser security, and solving complex engineering problems, we'd love to hear from you.
Within your first year, you'll have shipped secure, production-grade JavaScript and WebAssembly components that real users depend on every day. Along the way, you'll have introduced new techniques that materially strengthen our resistance to reverse engineering and client-side attacks, pushing the boundaries of what's possible in browser-based security. You'll have found ways to make the application faster without ever compromising its security guarantees, proving that performance and protection aren't a trade-off.
Beyond the code itself, you'll have helped define the engineering standards that shape how we approach browser security and secure client-side architecture, leaving a lasting mark on how we build. And by the end of that first year, you'll have become the person engineers across the organisation turn to when they need answers on web security, a trusted technical leader whose influence extends well beyond your own team.
Experience in several of the following:
The Vitality Programme includes a number of reward benefits that all employees have access to as part of the plan, for example:
Our Culture & Recruitment Process
At iProov, we're incredibly proud of the culture we've carefully curated. Our culture enables diverse thought, curiosity and innovation. Our team strives to do everything to the highest standard possible to achieve the remarkable. To do that we need different perspectives, experiences and ideas alongside an environment where these are welcomed - we want everyone to feel confident in bringing their full capabilities to work. We firmly believe psychological safety is key to building and nurturing great teams. We’re a small and dynamic company, that means having the right skills is important, and we know that our best work emerges when people feel secure, welcomed and respected.
As an equal opportunities employer, we encourage applications from people of all backgrounds. We’re committed to building a workforce that is representative of the people we serve. We will not put someone at a disadvantage or treat them less favourably because of race, color, national origin, ancestry, age, disability, creed, religion or belief, sex, sexual orientation, gender reassignment, marriage or civil partnership, or pregnancy and maternity. Our goal is to find people who are passionate about creating a safer, more secure world.
Our recruitment process is designed to be fair and transparent, focusing solely on your qualifications, competence, and suitability for the role. We review all applications carefully and will be in touch with shortlisted candidates regarding the next steps in our interview process. If you need an adjustment for a disability or any other reason during the hiring process, please send a request to [email protected]
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