Staff Software Engineer

Company Description
We're – you might not know our name, but companies like eBay, ASOS, Klarna, Uber Eats, and Sony do. That moment when you check out online? We make it happen.

is where the world checks out. Our global network powers billions of transactions every year, making money move without making a fuss. We spent years perfecting a service most people will never notice. Because when digital payments just work, businesses grow, customers stay, and no one stops to think about why.

With 19 offices spanning six continents, we feel at home everywhere – but London is our HQ. Wherever our people work their magic, they're fast-moving, performance-obsessed, and driven by being better every day. Ideal. Because a role here isn't just another job; it's a career-defining opportunity to build the future of fintech.

Job Description
As a Staff Engineer in our Financial Infrastructure team, you will provide expert technical leadership in designing and building our cloud-based finance platform. This is a pivotal role where you will define the standards for our distributed architecture and collaborate with product and engineering leaders to shape our technical and product roadmap. You'll be at the heart of automating 's complex financial processes, tackling the ongoing challenges of data integrity, granularity, and scalability to support our rapid global growth.

What You'll Be Doing

• Drive the long-term technical direction and strategy for the Financial Infrastructure pillar, looking beyond immediate requirements to ensure our solutions are built for scale.
• Act as a coach and mentor to our engineering teams, providing the technical leadership needed to solve complex distributed systems challenges.
• Proactively identify opportunities and take initiative to elevate the engineering standards within the pillar, fostering a culture of continuous improvement.
• Design, build, and evolve our core financial data-processing platforms, ensuring robustness and accuracy.
• Collaborate closely with Product Managers, finance stakeholders, and other engineering teams to translate complex business needs into elegant technical solutions.
• Lead technical discussions and decisions, ensuring we make the right architectural choices for the future.
• Serve as a role model for engineering excellence, championing best practices in code, architecture, and operational readiness.

What We Look For

• Extensive, hands-on experience in building and operating complex, cloud-based distributed systems.
• You take initiative and are accountable to your customers and colleagues.
• Deep expertise with modern data-streaming and processing technologies like Kafka, Flink, Iceberg, and AWS.
• A proven ability to raise the bar for engineering standards through effective coaching, mentorship, and a relentless drive for improvement.
• Excellent communication and collaboration skills, with the ability to articulate complex technical concepts to multidisciplinary teams and influence positive outcomes.
• Prior experience working on financial systems and a solid foundational understanding of finance and treasury concepts.
• A detail-oriented and data-driven approach to building solutions where accuracy and thoroughness are critical.
• A true passion for technology and a drive to solve problems at scale, keeping the customer at the forefront of every decision.

Nice To Haves

• Proven experience architecting and building large-scale, high-throughput financial data pipelines.
• Deep knowledge of data security principles and best practices in a regulated financial environment.

Why Join
This isn't just a job; it's a career-defining opportunity to shape the future of fintech. You'll take on real ownership and solve challenges that matter, delivering outcomes at the pace of a startup but with the scale of a global business

*Bring all of you to work*
We create the conditions for high performers to thrive – through real ownership, fewer blockers, and work that makes a difference from day one.

Here, you'll move fast, take on meaningful challenges, and be recognized for the impact you deliver. It's a place where ambition gets met with opportunity – and where your growth is in your hands.

We work as one team, and we back each other to succeed. So whatever your background or identity, if you're ready to grow and make a difference, you'll be right at home here.

It's important we set you up for success and make our process as accessible as possible. So let us know in your application, or tell your recruiter directly, if you need anything to make your experience or working environment more comfortable.

*Life at *
We understand that work is just one part of your life. Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.

Curious about what it's like to be part of our team? Visit our Careers Page to learn more about our culture, open roles, and what drives us.

For a closer look at daily life at , follow us on LinkedIn and Instagram