Senior Platform Engineer – Developer Experience

European Leveraged Finance Association

Senior Developer Experience Engineer at 9fin, enhancing software development tools and processes. Building reliable, secure software solutions for internal engineering teams.

Posted 7/22/2026full-timeLondon • 🇬🇧 United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining internal tools, services, and APIs while improving CI/CD systems and developer workflows. Proficient in modern programming languages and experienced in the software development lifecycle, with a focus on creating maintainable systems and enhancing developer experience.

Highest-signal resume keywords

CI/CDModern Programming LanguageCloud InfrastructureObservabilitySoftware Development Lifecycle

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentProduction Software DesignTestingOperational SupportCode ReviewService-Level IndicatorsReusable Platform CapabilitiesCommand-Line ApplicationsService TemplatesWorkflow Improvement

Soft Skills

Clear CommunicationProblem OwnershipUser Needs UnderstandingPragmatic ApproachLearning and Self-Improvement

Tools & Technologies

ContainersAPIsInternal ToolsDevelopment ToolsLoggingMetricsTraces

Industry Keywords

Developer ExperienceProduction Quality CodeFeedback MeasurementAdoption SupportMaintainable Systems

Tech Stack

Tools & technologies

Cloud

About the role

Key responsibilities & impact

Building and maintaining internal tools, services, APIs and command-line applications.
Improving workflows across coding, testing, code review, deployment and production operations.
Creating service templates and paved roads that make it easier to build secure, observable and reliable software.
Improving the speed, reliability and usability of our CI/CD systems.
Developing reusable platform capabilities that product engineers can consume through self-service.
Helping engineers use observability effectively, with good defaults for logs, metrics, traces and service-level indicators.
Working directly with engineers to understand friction, test ideas and support adoption.
Using feedback and workflow data to measure whether changes have improved the developer experience.
Contributing production-quality code, tests, documentation and operational support.

Requirements

What you’ll need

You are a strong software engineer with experience designing, building, testing and operating production software.
You are proficient in at least one modern programming language. We care more about engineering fundamentals than a particular language.
You understand the software development lifecycle and have practical experience improving how software is built, tested, deployed or operated.
You have strong opinions about what makes software development effective, while remaining pragmatic about different teams and contexts.
You can design maintainable systems and make sensible trade-offs between speed, quality and complexity.
You have experience with CI/CD, containers and cloud infrastructure.
You enjoy building tools and platforms for other engineers.
You take a product approach to internal tooling: understanding user needs, validating solutions and measuring adoption.
You can independently own a problem from discovery through to delivery and adoption.
You communicate clearly through code, documentation and technical discussions.
You have a real appetite for learning and self-improvement.

Benefits

Comp & perks

Competitive Salary (our salary bands are benchmarked at the top end of the market)
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
25 holiday days per year
Local public holidays (with the ability to exchange them for alternative days)
Hybrid working model, to allow you the flexibility to decide how, where and when you do your best work
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
Professional learning and development budget
Quarterly team socials
Summer and Winter company social events