Senior Backend Engineer

The role

This is a Senior Backend Engineer position. Youll work across the engineering surface which spans payment orchestration merchant APIs settlement flows internal business services and the infrastructure that supports them.

What you work on will depend on where the team needs you most and where your strengths are best applied. Some engineers go deep on payment orchestration and partner integrations. Others focus on merchant-facing APIs and developer experience. Others build the internal services that power finance ops and compliance workflows. The common thread is senior-level backend ownership: youll design APIs build services own your deployments and ensure the systems you ship are correct observable and production-grade.

Day-to-day youll write technical design documents ship production code collaborate on architecture decisions with your engineering lead and operate with the autonomy and accountability expected of a senior IC in a fast-moving payments team. Youll work primarily in Rust and TypeScript with infrastructure managed through AWS and Terraform. We expect engineers to use AI tools effectively in day-to-day work AI-assisted coding combined with strong human review is a core part of how we operate.

Key responsibilities

Backend service design & delivery

• Design build and maintain backend services across the platform payment flows APIs data pipelines and internal tooling
• Make sound architectural decisions for the services you own: API design data modelling error handling and system boundaries
• Write technical design documents before major implementation work and participate in architectural reviews
• Ship production-quality code with strong testing clear documentation and attention to edge cases

Ownership & operations

• Own your services end-to-end: implementation testing deployment monitoring and operational support
• Contribute infrastructure using AWS and Terraform we dont have a dedicated infra function so engineers own their infra
• Build observability into everything you ship: logging metrics tracing and alerting that meet the reliability bar of a production payment system
• Respond to and learn from production incidents driving improvements to system resilience

Collaboration & engineering culture

• Collaborate with cross-functional stakeholders including Product Design Ops Finance Legal and BD to turn requirements into clean implementations
• Participate in code review culture with AI-assisted development workflows including automated agent reviews on PRs
• Contribute to engineering standards documentation and team processes that help the team scale

Requirements

• Senior-level backend engineering experience youve designed shipped and operated production services with real users and real consequences
• Strong API and system design skills you can make sound architectural decisions in ambiguous problem spaces and reason clearly about trade-offs
• Production experience with cloud infrastructure (AWS preferred) comfortable working with managed services in a cloud-native environment
• Comfortable owning infrastructure via Terraform or equivalent you deploy and manage what you build
• Ability to translate business requirements from non-engineering stakeholders into correct maintainable implementations
• Strong written and verbal communication you write clear technical documents reason about trade-offs with non-engineers and work effectively in an async remote team
• Uses AI tools effectively in day-to-day engineering AI-assisted coding combined with strong human review is a core part of how we work

Nice to have

• Rust experience or strong systems-language background with willingness to ramp quickly (AI-assisted)
• Experience with payment systems or financial infrastructure transaction lifecycles settlement reconciliation fees FX
• Experience building merchant-facing or developer-facing APIs and tooling
• Exposure to data transformation reporting pipelines or internal business systems
• Crypto/Web3 familiarity understanding of wallets tokens chains stablecoins or on-chain settlement patterns

Benefits

• Fully remote position with a budget for your home office or work environment
• Regular team offsites to incredible locations around the world
• Opportunities to travel to conferences and community events
• Generous PTO and parental leave
• Meaningful learning & development budget
• Competitive compensation package including salary equity and potentially tokens
• Healthcare coverage for US-based team members
• The chance to build at the forefront of onchain payments with one of the most recognised companies in Web3