Senior Software Engineer - Finance

Methodfi; Greater London; On-site; GBP 70,000 - GBP 90,000; Full time

Job summary

A leading technology startup in Greater London is seeking a Senior Backend Engineer to help evolve their core business engine. This hands-on role focuses on designing and implementing backend systems that drive business-critical workflows. Candidates should have extensive backend development experience, fluency in multiple programming languages, and familiarity with complex domains. The position presents an exciting opportunity to shape the next chapter of a fast-growing organization dedicated to innovation in the drinks industry.

Qualifications

• Extensive backend development experience in complex domains.
• Fluency in at least 3 programming languages.
• Strong fundamentals in system design and software architecture.

Responsibilities

• Own the design and implementation of backend systems.
• Model domain complexity using DDD.
• Shape and evolve architecture transitioning to Node.js.

Skills

Backend development experience

Fluency in multiple programming languages

System design fundamentals

Experience in complex domains

Hands-on with relational databases

Event-driven architecture experience

Legacy system refactoring

Tools

PostgreSQL

Node.js

TypeScript

Job description

About Fero:

We’re revolutionising the supply chain and financial foundations of the $800bn global drinks industry by building a platform that will change the way that commerce is executed forever!

We've just secured our Series A funding and are proud to be part of Notion Capital's portfolio. We've already influenced immense change in the UK markets and have personally alreadyseen tremendous growth, with over £250 million of product transacted through the platform and increased annual sales by 1,000% since early 2023.

To date we're proud to say that we've deployed over £500m of funding in support of UK wine and spirits producers. As we look to expand our offering globally we're looking for ambitious builders that want to change an industry and be part of the journey with us.

We're first to market and intend to stay ahead of the game! In short, it's the perfect time to join as we aim for unicorn and beyond 🚀

About the Role:

We’re looking for a Senior Backend Engineer to help us evolve our core business engine. This role is deeply hands-on and implementation-focused, with strong scope for architectural input. If you’re driven by complex domains, clean abstractions, and high-impact ownership, this is for you.

Behind the scenes, our systems model deep commercial logic, financial rules, and real-world operations at scale. We’re moving fast, redesigning our architecture for the next chapter, and hiring exceptional engineers to help us build the future of global trade in drinks.

What You’ll Do:

• Own the design and implementation of backend systems driving business-critical workflows, financial calculations, and operational tooling.

• Model domain complexity using DDD and other architectural approaches across an event-driven modular monolith.

• Shape and evolve our architecture as we transition from Java to Node.js/TypeScript in a modern AWS-based environment.

• Work closely with product and operations to build features that serve both external users and internal teams.

• Play a key role in refactoring and rearchitecting complex codebases, balancing performance, readability, and testability.

• Contribute to and promote test automation and CI/CD pipelines, especially for regression coverage.

• Bring system-level thinking to design discussions with a team of senior/principal engineers.

What We’re Looking For:

Technical Experience:

• Extensive backend development experience in complex domains.

• Fluency in 3 or more programming languages — you’re a polyglot who chooses tools pragmatically.

• Strong fundamentals in system design, software architecture, and data modelling.

• Deep experience working in complex domains — such as financial systems, logistics, or workflow-heavy platforms.

• Hands‑on experience with relational databases (PostgreSQL preferred).

• Comfortable working in an event-driven, modular monolith environment.

• Experience with refactoring legacy systems and shaping technical direction.

Bonus Experience:

• Familiarity with DDD, CQRS, BDD, or similar techniques.

• Background in finance, accounting, logistics, or regulated domains.

• Strong test automation experience, especially in CI/CD and end-to-end testing contexts.

Mindset & Values:

• 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.

Why Ferovinum?

• Build software that models and solves real-world complexity at scale.

• Work with a team of experienced engineers who care deeply about quality and pragmatism.

• Help shape a fast-growing startup with a clear vision and exciting trajectory.

• Have a real impact on how capital flows through global supply chains.

• Join a culture that values intellect, ownership, merit, and velocity.

Fero provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity, or gender expression. We are committed to a diverse and inclusive workforce and welcome people from all backgrounds, experiences, perspectives, and abilities.