Core Systems Engineer (Platform Architecture)

Job Description

Requirements

• Extensive backend engineering experience designing and building foundational system components
• Fluency in 3+ programming languages - you're a true polyglot and value the right tool for the job
• Experience building or contributing to:
• Workflow orchestration or execution engines
• Event-sourced or event-driven systems
• Internal DSLs or behaviour modelling frameworks
• Snapshot or contract test infrastructure
• Financial systems (trade booking, valuation) a strong bonus
• Strong grounding in system design, architecture, and cross-cutting concerns
• You're curious and T-shaped - deep in your craft, broad in understanding
• You take extreme ownership, from implementation through to adoption and long-term maintainability
• You're self-driven, collaborative, and humble - you care about outcomes more than credit
• You value pragmatism over purity and optimise for business impact
• You actively embrace AI tools and agentic workflows as force multipliers in engineering

What the job involves

• We're hiring a Core Systems Engineer to help build and harden these foundational systems.
• This is a hands-on IC role focused on creating internal frameworks and architecture patterns that empower teams, improve system integrity, and accelerate delivery
• You'll collaborate with senior architects, interface across engineering, product, and commercial teams - and help define the developer experience for the next stage of Ferovinum's growth
• You'll work on projects like a custom workflow engine to coordinate complex multi-party business processes
• An event-driven data store designed for traceability, composability, and auditability
• A system behaviour DSL to simulate, verify, and document platform behaviour
• A snapshot test framework to power fast, reliable, end-to-end testing in CI/CD
• A trade booking subsystem to support financial operations and asset lifecycle management
• A valuation/evaluation engine for business logic tied to market data, commercial rules, and asset performance
• All developed as part of a long-term re-architecture strategy through incremental migration - building the future while running the present
• Your mission is to build and own core architectural frameworks that power the platform and multiply developer effectiveness
• Implement against an architectural vision set by senior architects, collaborating to bring ideas to life
• Design internal systems that optimise for release velocity, stability, and safety - making it easy to build and hard to break things
• Understand the commercial and product context behind every system to ensure pragmatic, outcome-driven design
• Document, educate, and evangelise the frameworks and approaches you build - helping the wider team get the most out of them
• Embrace and advance our AI-native culture, using modern tooling and agentic patterns to enhance development workflows
• How We Measure Success:
• Platform adoption across teams
• Improved developer velocity and reduced friction
• Higher system stability and confidence in change
• Increased architectural consistency and clarity
• Effective internal documentation and developer education