backend engineer in fintech

Ajaib Group is an Indonesian fintech company focused on transforming retail finance and expanding access to financial services.

• Design, build, and operate scalable, secure shared backend services and APIs used by multiple product teams
• Own larger services end to end, including monitoring, alerting, on-call follow-up, and support for teams using them
• Design stable APIs with clear contracts, versioning, backward compatibility, and safe deprecation
• Build and improve identity and access features, including sign-in, sessions, tokens, permissions, and account security
• Improve service resilience through rate limiting, graceful degradation, consumer isolation, and safe rollouts
• Improve observability with useful metrics, logs, and traces, and set service level objectives with dependent teams
• Lead design reviews and conduct thoughtful code reviews
• Investigate production incidents, perform root cause analysis, and deliver lasting fixes
• Mentor mid-level engineers and share knowledge within the team
• Work with product engineering teams, Security, Infrastructure, and Architecture to turn requirements into reliable solutions
• Design and scale centralized Kafka event streaming and asynchronous messaging platforms for organization-wide notifications and workflows
• Build and manage high-throughput, low-latency API Gateways and WebSocket infrastructure for Ajaib clients
• Develop and maintain feature flagging solutions for safe deployments, canary testing, and dynamic rollbacks

• Bachelor's degree in Computer Science or equivalent practical experience
• 5+ Years of professional backend engineering experience, including ownership of production services used by other teams or handling high traffic
• Strong skills in Java, Go, or another modern backend language
• Solid understanding of microservices, REST/gRPC APIs, event-driven design, reliability, and observability practices
• Hands-on experience with relational and NoSQL databases, query tuning, Redis caching, and Kafka messaging
• Strong knowledge of authentication and authorization, including OAuth2, OpenID Connect, and JWT, and secure coding
• Experience running services on GCP or AWS, using containers and CI/CD
• Ownership mindset, clear communication, and a service attitude toward internal users
• Будет плюсом: experience in fintech or another regulated environment, transitioning legacy monolithic authentication to centralized identity providers (IdP), or implementing Zero Trust patterns across microservices

• Performance bonus
• Comprehensive private health insurance
• Paid time off
• Company-sponsored training, courses, and professional certifications
• Career growth opportunities, meaningful ownership, and collaboration in cross-functional teams
• Employee discounts, partnerships, and lifestyle perks