Senior Penetration Tester
Starling Bank
Senior Penetration Tester
Starling Bank
Mobile banking for personal and business
Starling · London, United Kingdom (Hybrid) · Full-time · Posted 2026-07-20
Workplace: hybrid
Department: Penetration Testing
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. Read more about Our Story here.
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. In Technology, we're asking that you attend the office a minimum of 1 day per week.
About the Role
As an experienced Penetration Tester at Starling, you’ll be joining an established team, working with talented cyber security professionals to ensure our services are designed, developed and operated securely.
This is a collaborative role - you’ll directly interact with multiple areas of the business to understand requirements, conduct research, perform security testing, and report issues aligned to our risk framework.
Being an internal tester, you’ll gain a strong understanding of how technology works at Starling to enable in-depth testing. You’ll also support remediation processes, seeing your findings lead to tangible security improvements.
We understand the importance of knowledge and expertise remaining current, so we’ll actively support your advancement through research and training. In turn, you’ll help us continuously improve our processes, methodologies and tools to maintain the highest standard of testing.
Responsibilities
Collaborating with engineering teams to facilitate secure development, including:
Reviewing and analysing proposed technical solutions to identify appropriate security controls.
Advising on the remediation of security issues and identifying solutions to address root causes.
Automating security testing and developing internal tooling to achieve continuous assurance.
We’re open-minded when it comes to hiring and we care more about aptitude and attitude than specific experience or qualifications.
Ideally, we would like:
Technical knowledge - we don't expect mastery of every area, but are looking for a good foundation in the following domains:
Mobile security (iOS and Android)
Containers and Kubernetes
A desire to learn, and the ability to apply technical security knowledge to new and unfamiliar areas.
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:
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. In Technology, we're asking that you attend the office a minimum of 1 day per week.
You may be put off applying for a role because you don't tick every box. Forget that! While we can’t accommodate every flexible working request, we're always open to discussion. So, if you're excited about working with us, but aren’t sure if you're 100% there yet, get in touch anyway. We’re on a mission to radically reshape banking – and that starts with our brilliant team. Whatever came before, we’re proud to bring together people of all backgrounds and experiences who love working together to solve problems.
Starling is an equal opportunity employer, and we’re proud of our ongoing efforts to foster diversity & inclusion in the workplace. Individuals seeking employment at Starling Bank are considered without regard to race, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, ancestry, physical or mental disability, military or veteran status, or any other characteristic protected by applicable law.
When you provide us with this information, you are doing so at your own consent, with full knowledge that we will process this personal data in accordance with our Privacy Notice. By submitting your application, you agree that Starling Bank will collect your personal data for recruiting and related purposes. Our Privacy Notice explains what personal information we will process, where we will process your personal information, its purposes for processing your personal information, and the rights you can exercise over our use of your personal information.
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Mobile banking for personal and business
Starling Bank is a digital bank in the UK offering personal and business current accounts through a mobile app. For individuals, it provides features like instant spending notifications, insights, and Spaces (pots) to separate money. For businesses, it offers business accounts with invoicing and accounting integrations. The app handles account management, payments, and budgeting in one place, with transactions processed online and via card payments. The bank earns revenue from card interchange fees, interest on balances held with the central bank, and lending (such as personal loans and overdrafts). Its approach combines mobile-first banking with a broad set of services in a single app, differentiating itself through the Spaces budgeting tool, real-time transaction insights, and a strong focus on both personal and business banking. Starling’s goal is to grow its customer base while expanding its lending portfolio and offering a complete digital banking experience in the UK.
Explore more opportunities at Starling Bank