Senior Platform Engineer

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets. Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors.

The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption. We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide.

We are looking for a highly-motivated and driven platform engineer, with experience in enabling a DevOps culture within tech teams. In this role, your primary responsibility will be to provide a world-class developer experience to other engineers. You will have the autonomy to build solutions for the fascinating problems that we have to solve, allowing our customers (the software engineers) to build products quickly, securely, and to a high standard of quality.

Every day is different, but here’s an example of the kind of things you’ll work on:

• Designing and implementing high quality infrastructure as code templates/modules, and empowering software engineers to use them for their projects.
• Implementing AWS multi-account core infrastructure, and ensuring security best practices are being used across the cloud estate.
• Authoring CI/CD templates and optimisations to ensure that engineers can release as early and often as possible.
• Designing and implementing a developer portal, to provide a service catalog to the engineering team, and also author many other useful DevOps plugins.
• Contributing to observability best practices and providing key SLI/SLO metric reporting, so that the engineering team can balance velocity and reliability.
• Develop inner/open source projects to help provide a world-class developer experience to the engineering team.

This role will be a great fit if you have:

• Good working knowledge of AWS services including ECS, EC2, Lambda, VPC, IAM, Route53, CloudFront, S3, RDS
• Good understanding of monitoring and logging solutions. We use OpenTelemetry, AWS Cloudwatch and SigNoz so experience with them is a bonus.
• Basic SRE knowledge, and experience in alerting and incident management platforms (eg. incident.io http://incident.io, Pagerduty)
• Proven ability to provide and support strong and scalable CI/CD pipelines
• Linux, Git, Docker and good scripting skills in e.g. Python, bash, Go. You should be proficient in at least one modern programming language.
• Good experience in defining Infrastructure as Code using Terraform.
• Knowledgeable and comfortable with Agile development practices
• Great appetite for learning and self-improvement
• A real passion for developer experience, as well as an understanding and enthusiasm for Platform Engineering as a discipline
• Previous experience in fintech is a bonus

We’re a scaling start up, and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel. Financial & Insurance

• Competitive Salary (our salary bands are benchmarked at the top end of the market)
• Equity
• Pension (your minimum contributions are 4% with 9fin matching up to 7%)
• Private Medical Insurance
• Paid sick leave with Income Protection for long periods of illness
• Group Life Assurance
• Season Ticket Loan & Cycle to
• Work schemes Time off
• 25 holiday days per year
• Local public holidays (with the ability to exchange them for alternative days)
• Work abroad for up to 3 months a year
• 1 month paid sabbatical after 5 years of service
• Enhanced parental leave & flexible working arrangements available Training & Culture
• Professional learning and development budget
• Quarterly team socials
• Summer and Winter company social events Hybrid Policy 9fin is a hybrid company, and the office is a regular part of how we work. From January 2027, all employees will work from their designated 9fin office on Tuesdays and Wednesdays. Some teams may be asked to be in the office more often, where the nature of their work calls for it. For the rest of the week, you may work from wherever works best for you and your team. Your Talent Partner will share hybrid working details for this role. 9fin is an equal opportunities employer At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for
• either for this role, or perhaps another.

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