Principal Engineer – B2B Payments

Role Summary:

We are looking for a hands-on Principal Engineer to lead the technical design and development of Botim Business's B2B Payments platform, focusing initially on cross-border remittances. This role combines hands-on coding (approximately 50%) with technical leadership, architecture and mentoring a team of 2–6 engineers. You will drive the delivery of scalable, secure Java microservices within a regulated fintech environment.

Responsibilities:

• Own technical architecture and design decisions for B2B payment services and microservices.

• Develop and maintain backend services and REST APIs using Java and Spring Boot.

• Support frontend development using React and TypeScript when required.

• Lead code reviews, engineering standards, automated testing and CI/CD practices.

• Mentor engineers, provide 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.

• Leverage AI development tools (Claude Code) to improve engineering efficiency and automate processes.

Requirements:

• 10–15 years of backend software engineering experience, primarily with Java.

• At least 3 years of technical leadership experience managing or leading teams of 2–6 engineers while remaining hands-on.

• Expert knowledge of Java, Spring Boot, microservices and REST APIs.

• Working knowledge of React and TypeScript.

• Strong experience in payments, fintech or banking, ideally involving cross-border payments or remittances.

• Experience with transactional integrity, reconciliation, idempotency and payment failure handling.

• Strong knowledge of MySQL/PostgreSQL, SQL, Redis and Kafka, RocketMQ or RabbitMQ.

• Experience with OAuth 2.0, JWT and application security.

• Hands-on experience with Docker, Kubernetes, CI/CD and Azure or AWS.

• Strong system design, technical documentation and stakeholder communication skills.

• Excellent English communication skills.

• Bachelor's degree in Computer Science, Engineering or equivalent practical experience.

Core Technologies: Java, Spring Boot, Microservices, REST APIs, React, TypeScript, PostgreSQL/MySQL, Redis, Kafka, Docker, Kubernetes, CI/CD and GitHub.