Software Engineer - Mobile Security
The full posting
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.
We are about giving customers a new way to spend, save and manage their money while taking better care of the planet which has seen us become a multi-award winning bank that now employs over 2800 across five offices in London, Cardiff, Dublin, Southampton, and Manchester. Our journey started in 2014, and since then we have surpassed 3.5 million accounts (and four account types!) with 350,000 business customers. We are a fully licensed UK bank but at the heart, we are a tech first company, enabling our platform to deliver brilliant products.
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
We are seeking a highly motivated and experienced Mobile Security Engineer to join our Cyber Security team. As a Mobile Security Engineer, your primary responsibility will be to design, build, and maintain security for our Android and iOS mobile applications, ensuring our customers are protected while using our services. You will achieve this by collaborating with cross-functional engineering teams to implement robust security controls and enhancements.
Responsibilities
- Design, implement, and maintain security controls and mechanisms to secure our Android and iOS applications, and the data held on customer devices.
- Partner with internal engineering teams to identify and remediate security vulnerabilities across mobile platforms.
- Provide technical consultancy and guidance to engineering and operations functions to ensure that all technical aspects of our mobile applications are built and operated securely.
- Stay at the forefront of the industry by monitoring emerging threats and security trends for both Android and iOS.
- Create automated solutions to streamline security testing and vulnerability management within the mobile development lifecycle.
- Maintain strict adherence to global security standards and regulatory requirements.
Requirements
- Strong Mobile Security technical knowledge, including:
- Deep understanding of both Android and iOS security (e.g., native APIs, file permissions, application sandboxing, and hardware security controls).
- Proficiency with relevant mobile development languages (e.g., Swift for iOS, Kotlin/Java for Android).
- Practical and theoretical knowledge of public cloud (IaaS) technologies.
- Strong reverse engineering capabilities for mobile applications.
- Practical working knowledge of cryptography used for protecting data and network communications
- Awareness of mobile threat landscape such as malware and remote access
- Experience with developing security integrations by interacting with APIs.
- Ability and willingness to learn new technologies and adapt to evolving security landscapes.
- Strong written and verbal communication skills to effectively collaborate with cross-functional teams and stakeholders.
- Experience fulfilling a client-facing security consulting role is highly desirable.
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:
- First stage with a Mobile Engineer
- Technical Test
- Second stage with additional members Security Mobile Engineers
- Final stage with Security Engineering Lead and Information Security Director
Benefits
- 25 days holiday (plus take your public holiday allowance whenever works best for you)
- An extra day's holiday for your birthday
- Annual leave is increased with length of service, and you can choose to buy or sell up to five extra days off
- 16 hours paid volunteering time a year
- Salary sacrifice, company enhanced pension scheme
- Life insurance at 4x your salary & group income protection
- 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
- 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
About Us
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 Bank 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.
Where you can be based
This position is 100% remote and open to applicants based in United Kingdom.
Text as Starling Bank published it; last compared with the original on 14 Nov 2026.
The application
Your details and CV, then 14 questions (4 written).
- 1.As a regulated bank, we require our successful candidates to go through background checks (including but not limited to social media, employment references, fraud checks and criminal history). If we were to conduct these checks, is there anWritten answer
- 2.Will you now, or in the future, require sponsorship to work in the UK?Yes or no
- 3.Please confirm the current right to work document you hold, eg. British passport, settled status, ILR, Skilled Worker Visa (If visa, please confirm type and expiry):Short answer
- 4.Have you been convicted of any criminal offences that are not yet spent under the Rehabilitation of Offenders Act?Yes or no
- 5.In the last 5 years, have you had any CCJs, IVAs, bankruptcies or debt management plans? If yes, please provide received & settled dates & amounts.Short answer
- 6.Have you been dismissed from any employment in the past five years, other than for reasons of ill-health or redundancy?Choose any: 217166 · 217167
- 7.Have you previously worked for Starling Group (either directly employed or as a contractor/temporary worker)?Yes or no
- 8.What are your salary expectations?Short answer
- 9.Please can you confirm your current location?Written answer
- 10.Do you need any reasonable adjustments for the recruitment process?Written answer · optional
- 11.We want to make sure we're referring to you properly in your notes and interview communication so please tell us, what are your pronouns?Short answer · optional
- 12.Close Personal Relationship Declaration: A close personal relationship includes, but is not limited to, a spouse/partner, family member, or housemate. Any such relationship must be disclosed during your application. Further details will beChoose any: 284845 · 284846
- 13.If you have answered yes, please provide their full names:Written answer · optional
- 14.Have you worked for KPMG LLP or A&M Alansari Auditing at any point within the past 2 years, as a partner or as part of the audit engagement team for the audit of any Starling Group company?Choose one: 475878 · 475879
Taken from Starling Bank's application form as it stood on 14 Nov 2026.
The employer: Starling Bank
Starling runs a licensed UK app-based bank and sells its platform as Engine; security openings span red teaming, cloud security and quantum cryptography.
Pay and benefits: In-house security staff roles at a regulated bank and its software-as-a-service business.
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