Senior Software Engineer (Backend): Layer 1 Crypto Payments

About us:

We believe the next generation of financial services will be powered by stablecoins.

Founded in 2021, our mission at BVNK is to accelerate global money movement.

We’re building stablecoin-native infrastructure so businesses can move value instantly across borders and networks. With global licenses and T1 bank partnerships, we facilitate billions in transactions for enterprise clients like Worldpay, Deel, LianLian Global, and Rapyd.

Our technology is transforming how businesses operate globally by eliminating payment delays, reducing costs, and unlocking trapped capital. 

We’re a diverse team spread across EMEA, North America, and APAC, with a shared belief that stablecoins are the new infrastructure layer for financial services, and that BVNK is at the forefront of this shift.

In 2025, we secured strategic investment from Visa, following our $50 million Series B with Haun Ventures, Coinbase Ventures, Scribble Ventures, DRW Venture Capital, Avenir, and Tiger Global. With the backing of these leading investors, we’re accelerating our growth – and we're looking for smart, ambitious people to help us build the future of financial services.

We're incredibly honored to have made Newsweek's list of The Top 100 Global Most Loved Workplaces three years running (most recently in 2025) and to have been recognised by LinkedIn as one of the Top 20 Startups in the UK in 2024.

Function: Engineering

About this role in the team:

We are looking for a talented Senior Software Engineer to design and build the core Layer 1 blockchain infrastructure powering our high-throughput crypto payment platform. Our mission is to make cross-border payments seamless across both crypto and fiat currencies, enabling businesses to move funds globally with the ease of traditional finance and the flexibility of Web3.

In this role, you will sit at the intersection of deep blockchain protocol integration and high-availability payment systems. You'll tackle core challenges around speed, reliability, custody, and scalability to ensure flawless 24/7 transaction execution for our customers.

We operate in small, autonomous squads empowered to own their problem space end-to-end. We value engineers who bring strong, well-reasoned technical opinions, advocate for the simplest and most sustainable solutions, and execute rapidly to solve real customer problems.

Key Areas of Responsibilities:

• Design, develop, and maintain high-performance backend services powering blockchain integrations, digital asset custody, and on-chain transaction processing at scale.
• Build and evolve integrations with blockchain networks, crypto providers, and custody infrastructure to support multi-chain, multi-asset operations.
• Contribute to the architecture and evolution of the Layer1 platform, ensuring reliability, security, and data integrity across blockchain networks and asset types.
• Build and maintain APIs that support the full digital asset lifecycle — address generation, deposits, withdrawals, consolidation, and balance management — consumed by teams across the platform.
• Drive improvements to system observability, performance, and resilience, including monitoring, alerting, and incident response.
• Collaborate closely with cross-functional partners including product, design, and other engineering squads to deliver high-impact features.
• Participate in code reviews, architectural discussions, and technical design sessions to uphold engineering standards.
• Contribute to the team's engineering culture by mentoring peers, sharing knowledge, and championing best practices.
• Participate in an out-of-hours on-call rotation.

What we need from you: 

• 5+ years experience as a backend software engineer, with deep proficiency in languages such as Java, Kotlin or similar JVM-based languages.
• Experience designing, building, and operating microservices in a distributed systems environment.
• Solid understanding of relational databases (e.g., PostgreSQL) and event-driven architectures (e.g., Kafka, SQS/SNS).
• Experience with cloud platforms such as AWS, GCP, or Azure.
• Experience with containerisation and orchestration technologies including Docker and Kubernetes.
• Familiarity with infrastructure-as-code concepts and modern software delivery practices (CI/CD).
• Experience with observability and reliability tooling including logging, metrics, tracing, and performance optimisation.
• Comfortable working with Jira, Confluence, Git-based workflows, and collaborative engineering practices.
• Strong communication skills with the ability to explain technical concepts clearly to both technical and non-technical stakeholders.
•  A thoughtful, practical approach to problem-solving that considers tradeoffs and avoids over-engineering.

Nice to have:

• Experience working with blockchain technologies, cryptocurrency infrastructure, or digital asset custody systems.
• Exposure to stablecoin payments, on-chain transaction processing, or multi-chain infrastructure.
• Understanding of key management, wallet architecture, or self-custody patterns.
• Experience integrating with blockchain node providers and on-chain screening or compliance tools.
• Understanding of domain-driven design and hexagonal architecture patterns.
• Experience working in fintech, payments, or other high-availability transactional systems.
• Experience working in high-growth or fast-scaling technology environments.
• Experience contributing to engineering strategy, hiring, or organisational scaling initiatives.

What you can expect from us:

• Fair and competitive salary at every stage of your growth
• Flexible working hours, with hybrid working at its heart
• A culture built on passionate growth-minded people
• A flexible approach to holiday
• Opportunities to travel to our offices around the world
• An open and creative environment where you can help us define the future of BVNK, its culture, and its opportunity sets

At BVNK, we are focused on building a diverse and inclusive team. While you may not meet all of our requirements, we’d encourage you to apply if you meet the majority of our expectations. You may be a great fit for this role or another role in our team.