Principal Engineer - B2B Payments

About the role

Botim Business is looking for a hands-on Principal Engineer to lead the technical design and development of its B2B Payments platform, starting with cross-border remittances. The role combines about 50% hands-on coding with technical leadership, architecture and mentoring a team of 2 to 6 engineers, delivering scalable, secure Java microservices in a regulated fintech environment.

Key responsibilities

• Own the technical architecture and design decisions for B2B payment services and microservices.
• Develop and maintain backend services and REST APIs using Java and Spring Boot, and support frontend work with React and TypeScript when needed.
• Lead code reviews, engineering standards, automated testing and CI/CD practices.
• Mentor engineers, give technical guidance and remove development blockers.
• Collaborate with Product, Architecture, Risk, Compliance and external partners.
• Lead third-party banking, payment and payout integrations.
• Ensure production reliability, security, performance and incident management.
• Use AI development tools such as Claude Code to improve engineering efficiency and automate processes.

Required profile

• 10 to 15 years of backend software engineering experience, mainly with Java.
• At least 3 years of technical leadership managing teams of 2 to 6 engineers while staying hands-on.
• Strong experience in payments, fintech or banking, ideally with cross-border payments or remittances.
• Bachelor's degree in Computer Science, Engineering or equivalent practical experience.
• Excellent English communication skills.

Required skills

• Expert knowledge of Java, Spring Boot, microservices and REST APIs; working knowledge of React and TypeScript.
• Experience with transactional integrity, reconciliation, idempotency and payment failure handling.
• Strong knowledge of MySQL/PostgreSQL, SQL, Redis and Kafka, RocketMQ or RabbitMQ.
• OAuth 2.0, JWT and application security.
• Docker, Kubernetes, CI/CD and Azure or AWS.