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Lead the design, threat modeling, and security testing of Thought Machine’s cloud‑native banking products, driving security improvements across development and infrastructure teams.
Strong experience in application security (OWASP Top 10, penetration testing, security tooling) plus DevSecOps skills, proficiency in a language like Python/Go/Java, and knowledge of cloud, containers, and distributed systems.
The role safeguards the core banking platform, ensuring data privacy, regulatory compliance, and auditor confidence while enabling rapid, secure innovation.
A technically adept security professional who enjoys mentoring developers, thrives in a fast‑moving, greenfield environment, and can juggle multiple security projects autonomously.
Thought Machine's mission is bold – to properly and permanently rid the world's banks of legacy technology. To achieve this, we have developed the foundations of modern banking through core and payments technology which run natively in the cloud. What we are attempting is hard and means we need great people working together to build great technology.
We have grown rapidly in the past few years – growing our team to more than 550 individuals across offices in London, New York, Singapore, Sydney and our newly established Engineering Hub in Lisbon. We have raised more than £500m in funding and our investors include Molten Ventures, Eurazeo, Intesa Sanpaolo, Temasek, Nyca Partners, JPMorgan Chase Strategic Investments, Standard Chartered Ventures, and more.
We have created a culture that enables our team to produce the best work in the industry while ensuring we have fun along the way. We're regularly cited as having a fantastic workplace culture and have been recognised by Sifted magazine as having one of the highest Glassdoor ratings for a UK fintech company and the industry's most generous employee share package. Named one of the world's most innovative fintechs by Global Finance Magazine, we were also recognised by the Financial Times as one of Europe's fastest-growing companies for two consecutive years—and a UK Best Employer for 2026.
This is a full-time, permanent position based in our Lisbon office, requiring three days a week onsite.
This position plays a key role in ensuring Thought Machine teams are taking all required steps in building a secure product set. You will play a major and leading role in protecting Thought Machine product against security risks, with influence to implement cutting-edge measures to minimise exposures and vulnerabilities.
Whether engineering a system to address a technical security hurdle, protecting our customers' data, or consulting on a wide range of security topics, you are empowered to engage and lead cross-functionally.
A large part of Thought Machine product security function is a greenfield challenge, we are building the bank of tomorrow with cutting edge web technology, no best-practice/of the shelve security frameworks or tools can solve our security challenge. We are building the best security to enable engineering and impress financial service auditors. Key qualities of the ideal candidate would have experience in OWASP top 10 vulns, devsecOps, data privacy protection, passion to mentor and enable devs, creativity, autonomy, ability to work and complete multiple projects simultaneously.
We actively hire candidates who demonstrate technical excellence in their field and welcome people of all ages and backgrounds, providing everyone with equal access to professional development. You are encouraged to apply even if your experience doesn't accurately match the job description. We also encourage applications from those with different abilities, including candidates with ADHD, autism, dyslexia or dyspraxia.
