iProov on cord

iProov

Senior Web Security Engineer

External position
London, UK
Hiring internally for iProov?
Identity and Access · Computer and Network Security
Right person. Real person. Right now.
Posted
2 months ago
Checked
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2 days ago

Skills & Experience

Job roles: Security Engineer
Experience level: Senior
Core skills considered: JavaScript, Typescript, Rust
Other skills considered: CI/CD, Security Testing

Logistics

Base salary: Undisclosed
Some companies on cord are unable to disclose salaries publicly due to internal company policies. Message the company for salary information.
Employment type: Permanent
Remote working: Hybrid
Visa sponsorship: Not available

Job Description

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.


How you can make an impact

  • Design and implement secure JavaScript and WebAssembly components for production web applications.
  • Develop techniques to protect client-side code from tampering, reverse engineering, debugging, automation, and exploitation.
  • Design and implement anti-tamper, integrity verification, and runtime protection mechanisms.
  • Build high-performance WebAssembly modules using C++, Rust, or AssemblyScript.
  • Analyse browser behaviour, JavaScript engines, and WebAssembly runtimes to identify security risks and performance opportunities.
  • Research emerging attack techniques targeting web applications and develop practical mitigations.
  • Collaborate closely with developers, product, and red teams to integrate security into the development lifecycle.
  • Investigate vulnerabilities, perform root-cause analysis, and develop long-term remediation strategies.
  • Contribute to technical architecture and mentor other engineers on secure development practices.

What we would like to see 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.


Technical Expertise

  • Expert-level JavaScript (ES6+) and TypeScript.
  • Strong experience developing production WebAssembly applications.
  • Experience with Rust, C++, or another systems programming language used to produce WASM modules.
  • Deep understanding of browser internals and modern web platform APIs.
  • Experience securing client-side applications against:
    • Reverse engineering
    • Runtime modification
    • Instrumentation frameworks
    • Code injection
  • Experience with secure software architecture.

Security Knowledge

Experience in several of the following:

  • JavaScript de-obfuscation and obfuscation techniques
  • WASM binary analysis
  • Static and dynamic analysis
  • Anti-debugging techniques
  • Anti-tamper technologies
  • Runtime integrity verification
  • Secure code signing and integrity checking
  • Software protection techniques
  • Secure SDLC practices

Engineering Experience

  • 5+ years of software engineering experience.
  • Experience designing highly performant browser-based applications.
  • Strong testing, debugging, and profiling skills.
  • Experience working with CI/CD pipelines and automated security testing.
  • Comfortable working across Windows, macOS, Linux, and mobile browsers.
  • Excellent communication skills with the ability to explain complex technical concepts clearly.

Nice to Have

  • Experience with V8, SpiderMonkey, JavaScriptCore, or Chromium internals.
  • Knowledge of WebGPU, WebRTC, or WebCodecs.
  • Experience with binary instrumentation and compiler toolchains.
  • Experience building SDKs or developer platforms.
  • Knowledge of mobile browser security.
  • Experience with biometrics, identity verification, or fraud prevention technologies.
  • Contributions to open-source security tools or security research publications.

Company Benefits

  • 25 days Annual Leave, plus 8 Bank Holidays
  • Share Options allocated after passing probation (6 months of service)
  • Vitality Health - a range of options available on this below
  • Life Assurance
  • SmartHealth - Access to private GP, Psychologist, Nutritionist along with tailored fitness plans for both you and your family
  • Award winning L&D platform to continue your development with personal allocated training budgets
  • Enhanced Maternity leave package
  • Pension - 4% employee, 3% employer
  • Flexible working – remote/office etc.
  • Free Barista Coffee/Tea, biscuits and fruit in the office
  • Free access to WeWork discounts and free online well-being sessions
The Vitality Programme includes a number of reward benefits that all employees have access to as part of the plan, for example:
  • Private Health cover including Dental, Optical, and Audiology
  • 50% off monthly gym memberships
  • Apple watches significantly discounted based member vitality status
  • Half price trainers with Runners Need
  • Weekly rewards – Free coffee with Café Nero
  • Monthly rewards – Free Cinema ticket
  • Discounts on travel with Expedia (hotels) and Mr & Mrs Smith with discounts getting greater throughout the year based on a members vitality status
  • Amazon prime free months based on activity
  • Up to 25% cashback at Waitrose when buying healthy foods
  • 75% off stays at Champneys Health Spas
  • Allen Carr’s £299 no smoking programme for free
  • Access to Vitality Healthy Mind with 30% off Headspace subscriptions and the ability to earn Vitality points for using Buddhify, Calm and Headspace
  • Discounts on Weight Watchers
  • 50%-80% off Comprehensive Private Health screenings
Senior Web Security Engineer at iProov
Position posted 2 months ago

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Starling Bank on cord

Starling Bank

Full Stack Engineer (ML Ops)

London, UK
FinTech · Banking · Finance
A better bank for everyone
Active
over 6 months ago
Responds to
0% of requests
Responds in
1h 55m
Requests
7 pending

Skills & Experience

Job roles: Full Stack
Experience level: Mid, Senior
Core skills considered: Java, React, Redux, AWS, JavaScript

Logistics

Base salary: £70K - £110K
Employment type: Permanent
Remote working: Hybrid (up to 2 remote days p/w)
Visa sponsorship: Not available

Job Description

Starling is the UK’s first and leading digital bank on a mission to fix banking! Our vision is fast technology, fair service, and honest values. All at the tap of a phone, all the time.

Starling is the UK’s first and leading digital bank on a mission to fix banking! We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way.

We’re a fully licensed UK bank with the culture and spirit of a fast-moving, disruptive tech company. We’re a bank, but better: fairer, easier to use and designed to demystify money for everyone. We employ more than 3,000 people across our London, Southampton, Cardiff and Manchester offices.

Our technologists are at the very heart of Starling and enjoy working in a fast-paced environment that is all about building things, creating new stuff, and disruptive technology that keeps us on the cutting edge of fintech. We operate a flat structure to empower you to make decisions regardless of what your primary responsibilities may be, innovation and collaboration will be at the core of everything you do. Help is never far away in our open culture, you will find support in your team and from across the business, we are in this together!

The way to thrive and shine within Starling is to be a self-driven individual and be able to take full ownership of everything around you: From building things, designing, discovering, to sharing knowledge with your colleagues and making sure all processes are efficient and productive to deliver the best possible results for our customers. Our purpose is underpinned by five Starling values: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.

Hybrid Working

We have a Hybrid approach to working here at Starling - our preference is that you're located within a commutable distance of one of our offices so that we're able to interact and collaborate in person. We don't like to mandate how much you visit the office and work from home, that's to be agreed upon between you and your manager.

Our Data Environment

Our Data teams are excited about the value of data within the business, powers our product decisions to improve things for our customers and enhance effective and agile decision making, regardless of what their primary tech stack may be. Hear from the team in our latest blogs or our case studies with Women in Tech.

We are looking for talented data professionals at all levels to join the team. We value people being engaged and caring about customers, caring about the code they write and the contribution they make to Starling. People with a broad ability to apply themselves to a multitude of problems and challenges, who can work across teams do great things here at Starling, to continue changing banking for good.

Requirements

We have built our entire banking platform in house and mostly in Java. We are looking for people who want to work on building the tooling that is used by our engineers on a daily basis.

We are looking for people who are truly full stack, and are as comfortable polishing their javascript front end as they are debugging the innards of their java applications database interactions, or standing up infrastructure with terraform. We are looking for people who can:

  • Design REST apis.
  • Code backend services, ideally using Java, or another other server side compiled language.
  • Develop modern front ends, ideally using React and Redux.
  • Get their code into the cloud and support it there, ideally on AWS.
  • Believe in clean coding, simple solutions, automated testing and continuous deployment.
  • Like to take ownership of a feature from the original idea through to live.
  • Think (like us) that a small number of empowered developers is the right way to deliver software.

Company Benefits

  • 33 days holiday (including flexible bank holidays)
  • An extra day’s holiday for your birthday
  • 16 hours paid volunteering time a year
  • Part-time and/or flexible hours available for most roles
  • Salary sacrifice, company enhanced pension scheme
  • Life insurance at 4x your salary
  • Hybrid/remote working
  • Private Medical Insurance with VitalityHealth including mental health support and cancer care. Partner benefits include discounts with Waitrose, Mr&Mrs Smith and Peloton
  • Generous family-friendly policies
  • Varied social groups set up and run by our employees
  • Perkbox membership giving access to retail discounts, a wellness platform for physical and mental health, and weekly free and boosted perks
  • Access to initiatives like Cycle to Work, Salary Sacrificed Gym partnerships and Electric Vehicle (EV) leasing

Full details are available on our careers site

Interview Process

Interviewing is a two way process and we want you to have the time and opportunity to get to know us, as much as we are getting to know you! Our interviews are conversational and we want to get the best from you, so come with questions and be curious. In general you can expect the below, following a chat with one of our Talent Team:

  • Stage 1 - 30 mins with one of the team
  • Stage 2 - Take home challenge
  • Stage 3 - 90 mins technical interview with two team members
  • Stage 3 - 45 min final with an executive and a member of the people team
Alex Yeates on cord
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