Senior Backend Engineer, Squad T-Rex

NALA; Greater London; Sur place; GBP 90 000 - 150 000; Plein temps

Résumé du poste

NALA is building Payments for the Next Billion. We are seeking a Senior/Lead Engineer to own the wallet and Global Accounts foundation, shaping architecture for cross-border payments and multi-currency wallets.

You will lead design work, translate business requirements into robust technical specs, and collaborate with PMs to ship scalable fintech services in a VC-backed environment. This role offers ownership, impact, and the chance to change global payments.

Qualifications

• Translate business intent into technical requirements and clean system boundaries.
• Design-first: create diagrams, RFCs, and high-level system views.
• Maintain high standards of engineering quality, reliability, and tests.

Responsabilités

• Own architecture and implementation for wallet and Global Accounts foundation.
• Lead design work (RFCs, diagrams, API and system specs) before building.
• Translate business intent into technically sound requirements with PMs.
• Build infrastructure for virtual account provisioning and wallet delegation.
• Expand Global Accounts into new markets and enable stablecoin card capability.
• Drive API quality, testing strategy, code reviews, and maintainability.
• Plan delivery by breaking down complex work, sequencing milestones, and keeping progress.
• Make pragmatic trade-offs: move fast where possible, protect correctness where required.
• Join monthly on-call rota; fully compensated after onboarding.

Connaissances

Requirement gathering

Design-first

Engineering quality

Disciplined execution

Description du poste

About Us

NALA is building Payments for the Next Billion. Faster, smarter, and fairer transfers for everyone. Since 2022, we've grown our business 120x, grown the team from 9 to 150+, raised $50M+ from top-tier investors, and were named to the Forbes Fintech 50 in 2025 and 2026.

We operate two core products:

• NALA, our consumer app making cross-border payments cheaper, faster and more reliable for the global diaspora. Allowing users to send money from the UK, US and EU to Africa and Asia.
• Rafiki, our B2B payments infrastructure, is powering global payments.

Our team includes alumni from Wise, Stripe, Monzo, Revolut, and CashApp, operators who've scaled world-class products. We act with urgency, think deeply, and put our customers first always.

At NALA, this isn't just a job. It's ownership, impact, and the chance to change global payments forever.

Join us in building Payments for the Next Billion!

Your Mission

Squad T-Rex's mission is to build the best wallet as the foundation for more financial products, and offer competitive and reliable cross-border payments to Africa and beyond.

This includes things like:

• Scaling our wallet product offering as a new growth engine, giving customers easy access to multi-currency wallets backed by stablecoins or banking providers.
• Expanding our wallet offering into new markets, making multi-currency financial infrastructure accessible to customers globally.
• Growing our customer base by launching in new countries.
• Building B2B products that leverage wallet infrastructure processing hundreds of millions of dollars in transaction volume.

We are building the wallet and the accounts infrastructure that the rest of NALA stands on.

We need a strong Senior / Lead Engineer (ideally with financial systems experience) who can take ownership of figuring out the right ways to build a robust wallet & foundation that can scale with us.

Your Responsibilities in this Role

• Own key architecture and implementation decisions for NALA's wallet and Global Accounts foundation
• Lead design work (RFCs, diagrams, API and system specs) to align on solutions before building
• Partner with the PM and stakeholders to translate business intent into technically sound requirements
• Build the infrastructure behind virtual account provisioning, starting with US virtual account details for non-resident customers, and lift pre-generated wallet delegation success rates
• Help launch Global Accounts into additional markets and kick off our stablecoin card capability
• Drive engineering quality across API standards, testing strategy, code review bar, and maintainability
• Manage delivery by breaking down complex work, sequencing milestones, and keeping projects moving end to end
• Make pragmatic trade-offs: move fast where we can, protect correctness where we must (especially in systems handling real customer money)
• Join our on-call rota once a month for 1 week (This will be fully compensated + post onboarding)

Read This Before You Apply

To set you up for success, we want to be explicit about how engineering works here:

• We build depth before breadth. Engineers typically start by embedding deeply in a product squad, learning the domain, how we operate as a business, and earning trust through delivery. Broader, cross-cutting impact follows from that foundation.
• This is a high-pace, VC-backed environment. Priorities can shift quickly and ambiguity is normal. We are looking for people who stay calm, make good calls with imperfect information, and keep momentum.
• Ownership includes alignment. We expect engineers to drive work end to end and collaborate with other engineers, follow chapter standards, and bring others along, so solutions scale beyond one person.
• Collaboration is part of the craft. We value consultation, design reviews, and feedback loops because they help us build better systems and avoid rework. We value autonomy, but not lone-wolf engineering.

Must-have requirements

Knowledge

• How to translate business intent into technical requirements and clean system boundaries
• What "good" looks like in financial-grade systems, including correctness, reliability, auditability, and operational readiness
• Design principles that drive maintainability (single responsibility, separation of concerns, etc.)
• API fundamentals, including consistency, versioning, backward compatibility, and developer experience

Skills

• Requirement gathering
  • You do not just take tickets and build
  • You quiz PMs, challenge stakeholders, and push on solutions that do not make sense
  • You do not accept proposals from non-technical people at face value, you turn business intent into something technically sound
• Design-first (this is a must)
  • You are not someone who "thinks by coding"
  • You draw diagrams, write RFCs, explore hypotheses, and visualise systems at a high level
  • Freestyling into implementation without alignment is not your style
• Engineering quality
  • You care about good API design and reusability
  • You write unit-testable code and advocate for quality during code reviews
  • Especially in financial systems, "it works" is not the bar
• Disciplined execution
  • You can own complex projects end to end
  • You avoid excessive context switching and push back when too many parallel things risk delaying delivery
  • You care about finishing work properly, not just "mostly done"

Experience

• Proven delivery of complex backend or distributed systems in a production environment
• Experience owning systems end to end, from design to build to ship to operate to iterate
• Experience working closely with PMs and stakeholders to shape solutions, not just implement them
• Experience making pragmatic trade-offs in startup environments, balancing speed, correctness, and scope

Behaviours

• Calm, decisive, and effective in ambiguous environments
• Collaborative by default, aligns early,