Senior Software Engineer (Backend): Ledger - Wallets

We are looking for an experienced Senior Backend Software Engineer to help design and evolve critical financial infrastructure supporting fiat and cryptocurrency wallet operations.
In this role, you will take ownership of the Wallets subdomain, building scalable services that manage the complete lifecycle of customer wallets across multiple products and customer types.
You will work on foundational systems where reliability, security, compliance, and data accuracy are essential.
Collaborating with autonomous engineering squads and cross-functional teams, you will contribute to distributed architectures and complex integrations across financial domains.
You will have significant technical ownership, influencing architectural decisions and delivering solutions that support growing transaction volumes and new financial capabilities.
Working in a collaborative international engineering environment, you will combine hands-on development with production ownership and continuous technical improvement.
This is an opportunity to contribute to the evolution of global financial services through innovative stablecoin and payment infrastructure.

The ideal candidate is a technically strong backend engineer with extensive experience building distributed systems and managing complex financial or account-based platforms. You should demonstrate strong architectural judgment, operational ownership, and the ability to collaborate effectively within a distributed engineering organization. Key qualifications include:

• At least 5 years of professional backend engineering experience, particularly with Java or Kotlin and Spring Boot.

• Strong understanding of distributed systems and experience developing microservices using event-driven architectures and technologies such as Kafka or AWS SQS.

• Hands-on experience with relational databases, including MySQL or PostgreSQL, and caching technologies such as Redis.

• Previous experience building or maintaining wallet, account management, or financial entity management systems, including lifecycle management and state machines.

• Strong understanding of domain-driven design (DDD) and hexagonal architecture, with the ability to model complex business domains, define bounded contexts, and establish clear service boundaries.

• Experience designing and evolving RESTful APIs for internal services and external customers, with particular attention to backward compatibility and developer experience.

• Experience with production monitoring, on-call responsibilities, and incident management, supported by observability tools such as Grafana, Prometheus, and Micrometer.

• Familiarity with CI/CD pipelines, infrastructure-as-code practices, and modern observability solutions.

• Strong communication and collaboration skills, with the ability to work effectively alongside product managers, operations teams, and engineers across different domains and time zones.

• A proactive approach to technical problem-solving, with a strong sense of ownership and commitment to building reliable production systems.

• Willingness to participate in an out-of-hours on-call rotation.

Nice to have:

• Experience designing and managing multi-tenant architectures and tenant migration strategies.

• Background in embedded finance, Banking-as-a-Service (BaaS), or payment platforms supporting B2B2C business models.

• Familiarity with database migration strategies in high-throughput production environments.

• Experience developing dynamic validation engines or capabilities and feature-flag systems.

• Previous exposure to stablecoins, cryptocurrency, blockchain technology, or related financial products.