As the first dedicated security hire within a high-seniority Platform team, you will build the security function from the ground up. You will design automated guardrails, implement policy-as-code using Terraform, and secure the software supply chain for a platform used by 300+ blue-chip institutions, including global investment banks and private equity firms.
This job is no longer actively hiring. Talk to Jack to find live roles.
Senior Platform Engineer at 9fin
Are you ready to build a security function from the ground up at one of Europe's fastest-growing fintech unicorns? You will move beyond mere configuration to design secure-by-default systems and automated guardrails for a platform used by 300+ blue-chip institutions. If you are a Terraform expert with a passion for DevSecOps and the autonomy to shape a greenfield function, this is your next career-defining move.
Want to apply for this role?
This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
Remote (United Kingdom)
Compensation
Not Disclosed
Company
9fin
Role overview
Finance
9fin is the AI-native intelligence platform built for modern credit teams- founded in 2016 by ex-investment bankers Steven Hunter and Huss El-Sheikh to replace the fragmented, manual workflows that have defined debt capital markets for decades by unifying real-time news, structured data, and AI-powered analytics across leveraged finance, distressed debt, CLOs, private credit, ABF, and investment grade. Backed by $250M+ from Spark Capital, Redalpine, and Lakestar, and powering credit teams at 300+ institutions including major investment banks, hedge funds, law firms, and private credit funds across North America, Europe, and Asia-Pacific, the company reached a $1.3B unicorn valuation at its Series C. 9fin careers attract people who sit at the intersection of financial markets expertise and a genuine love of data and technology; 9fin job openings in London and New York are for those who bring intellectual rigour and a product mindset to the challenge of making debt capital markets more efficient and transparent.
What you will do
- Design and implement automated security guardrails across a multi-account AWS environment using Terraform and policy-as-code to enforce secure defaults.
- Build and maintain robust software supply chain security, including secret scanning, dependency management, and automated CI/CD gates within GitHub Actions.
- Partner directly with engineering teams to threat model new systems and influence a culture of security across the entire 300+ client-serving organization.
Who this is a fit for
- Extensive hands-on experience building or significantly maturing the security posture of an AWS-based platform in a startup or scale-up environment.
- Deep technical proficiency in Infrastructure as Code (Terraform) and automating security checks within modern CI/CD pipelines like GitHub Actions.
- Pragmatic approach to security that balances robust protection with high-quality developer experience, coupled with the ability to influence cross-functional engineering teams.
Why this role is remarkable
- Lead a greenfield "cold start" security function with total autonomy to design and implement modern DevSecOps standards from scratch.
- Join a high-growth unicorn that recently closed a $170M Series C, serving as a mission-critical infrastructure provider for the world's largest asset class.
- Work within a highly senior, remote-first engineering culture that prioritizes building self-service tooling and maintainable, secure-by-default systems over manual processes.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and 9fin wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.