Senior Software Engineer [Rust]

Experteer Italy; City Of London; Hybrid; GBP 65,000 - 79,000; Full time

Job summary

A leading fintech company based in London is seeking a Senior Software Engineer to enhance its payment platform. The role involves developing distributed systems, ensuring platform reliability, and mentoring team members. Ideal candidates will have backend development experience in languages such as Rust or .NET, along with a solid understanding of API design and common design patterns. The company offers a hybrid work model and a competitive salary package including equity.

Benefits

Competitive salary

Equity in the company

Flexible hours

Home office setup contribution

Generous holiday policy

Meal vouchers

Learning and development budget

Paid wellbeing days

Qualifications

• Experience in building distributed systems.
• Understanding of design patterns.
• Familiarity with API design.

Responsibilities

• Develop and maintain scalable systems.
• Collaborate with product and engineering teams.
• Participate in incident response.

Skills

Distributed systems architecture

Backend development in Rust, .NET, Java, or Go

API design and web frameworks

SQL and NoSQL technologies

Testing best practices (TDD, unit testing)

Incident response and service recovery

Tools

AWS

Kubernetes

Terraform

Prometheus/Grafana

Job description

Who we are:

TrueLayer is Europe's fastest-growing Pay by Bank network. We power smarter, safer and faster payments by combining real‑time bank payments with financial and identity data. E‑commerce, iGaming and financial services businesses use our products to onboard new users, accept money and make payouts in seconds, and at scale. Live across 22 countries and with one new user joining TrueLayer's Pay by Bank network every 3 seconds, we're in a very exciting growth stage. This is why we're expanding the team across our offices in London, Milan, and Dublin.

Listed in Sifted as one of the 100 fastest‑growing start‑ups in UK & Ireland, and CNBC's World Top Fintech Companies, we're trusted by industry leaders like RyanAir and Just Eat Takeaway for continued innovation within our payment products. To date, we've raised over $300 million from world‑renowned investors including Stripe, Tiger Global, Northzone, and Tencent. But this is just the beginning.

We're looking for people who are excited about joining the Pay by Bank revolution and helping us change the way the world pays. Could this be you?

Description

At TrueLayer, we're building a global open banking platform that's changing how money moves and so much more. We make payments and refunds instant, account data accessible and verification seamless – all so innovators in every industry can build better financial experiences for their users.

We're looking for software engineers who love learning new things and working with others to solve complex customer problems. You'll be at the heart of financial innovation, using industry‑disrupting technologies like open banking to revolutionise online payments and enable financial data to be integrated into any app or website.

Working at a rapidly growing fintech, you'll encounter new and exciting challenges as we scale our products and infrastructure to meet the demands of our customers, and expand our ecosystem to open up new possibilities. Guided by our Engineering Principles, you'll collaborate on the design, implementation, delivery and operation of our products – in short: you'll build it, you'll run it!

In addition to working with modern development frameworks and cloud technologies, we are committed to helping you develop new skills and advance in your career. Whether you want to continue to grow your technical expertise or move into leadership, we have clear and tangible paths for everyone, irrespective of your level of experience, role or discipline.

Our challenges

• We want to continuously iterate and improve our offering without compromising the stability or long‑term maintainability of our systems.
• We serve millions of API requests with a 99.5% availability SLA. Our platform must remain a reliable foundation that our customers can build upon as we expand (new products, new geographies, more volume).
• We want TrueLayer to be an exceptional place to work. We want our processes and interactions to stay honest, genuine and human as the company grows.
• We want our engineers to grow with us. To have the opportunity, the guidance and the support to develop their technical and core skills to the fullest within the organisation.

What we expect from you, as a Senior Software Engineer

• Become a proficient user of our platforms (AWS, Kubernetes, Prometheus/Grafana, etc) and our tools (Rust and .NET). Training will be available to fill in any gaps in your current knowledge.
• Partner with your Engineering Manager and Product Manager to size and break down requirements for new features and product efforts.
• Communicate effectively with both technical and non‑technical stakeholders.
• Employ design patterns, testing and automation to ensure fast and safe iteration cycles. Use your knowledge to coach your teammates and level up the whole engineering organisation.
• Play an active role in our incident response. Support the Incident Lead by taking ownership of investigation and service recovery for the areas of our platform under your responsibility.
• Contribute to cross‑team technology efforts by joining our engineering guilds.
• Role model our values and help make sure TrueLayer remains an exceptional place to work.

Requirements

• Experience building distributed systems in any common backend language/framework such as Rust, .NET, Java, and Go.
• Thorough understanding of common design patterns and principles, and how/when to apply them.
• Familiarity with API design and experience with at least one web framework.
• Knowledge of both SQL and NoSQL data technologies.
• Understanding of microservice architecture and its associated challenges.
• Familiarity with testing best practices – TDD, unit testing and integration testing, etc.
• Experience with observability and alerting in mission‑critical distributed systems.

We'd be particularly excited if you have:

• Understanding of protocol buffers, gRPC, and message queue systems.
• Experience building libraries and involvement in open source software.
• Hands‑on experience with AWS and infrastructure‑as‑code tools such as Terraform.

Benefits and Compensation

65,750 – 79,000 + equity

What you can expect from us

• Competitive salary and meaningful equity in the company.
• Flexible hours and hybrid working – we offer a hybrid approach to work of 3 days per week remote working and 2 days per week in our new offices in London, Milan and Dublin.
• No worries about collecting kids from childcare or working out in the gym first thing – we trust you to do your best work within our hybrid framework.
• A one‑off contribution of 200 to help you set up your home office.
• Flexible holiday policy, with 24 days as standard.
• 2 volunteering days to support causes important to you.
• Generous parental leave, above and beyond statutory requirements and with no minimum tenure.
• Meal vouchers for every day you're working, including while remote.
• Budget to spend on learning & development each year.
• 12 fully‑paid wellbeing days a year and your birthday off (on top of the holiday allowance).
• Membership of mental wellbeing platform Spill.

About our hiring process

• A call with one of our Talent Acquisition Partners.
• A take‑home exercise – Software Engineering Challenge.
• 2‑hour video interview with two TrueLayer engineers.
• 1.5‑hour total final round video interviews.

Full details on the interview process, including preparation tips and the qualities we look for in future TrueLayeristas, can be found on our blog.

At TrueLayer, we don't just do inclusion and diversity. We embrace people that have different opinions, perspectives and personalities. Because we believe that by seeing the world from all sorts of angles, we can make life better for all the people who live in it. We strongly encourage applications from underrepresented groups (e.g. people of colour, the LGBTQ+ community, people with disabilities, neuro‑divergent people, parents, carers, and people from all socio‑economic backgrounds). If you'd like to discuss alternative working patterns, please let us know.

We will always aim to make appropriate adjustments to ensure we are fully inclusive to people with different needs during our interview process. So if you need us to make any adjustments to suit your individual needs please let us know – we'll be happy to support you.