Senior Go Backend Engineer — Fintech Platform

Xenith; Jakarta Pusat; On-site; IDR 420,000,000 - 750,000,000; Full time

Job summary

Xenith is a B2B fintech platform seeking an experienced Go backend engineer. You will design, build, and maintain scalable services, integrate with payment providers, and ensure robust tests and security.

You will mentor engineers and uphold clean architecture while delivering high-impact features for a fast-growing fintech environment. You will collaborate across product, infra, and QA to ship reliable payments software, deploy on AWS, and drive observability and performance improvements.

Qualifications

• Bachelor's degree in Computer Science or a related field.
• 5+ years backend engineering experience with production Go.
• Proven track record of integrating with external APIs, especially in payments/fintech.
• Strong system design and test-driven development.
• Experience with PostgreSQL and Redis in high-availability environments.
• Experience with test automation.
• Strong communication skills for stakeholders.
• Familiarity with Agile practices and continuous improvement.
• Security-conscious mindset; OWASP awareness.
• Demonstrated leadership in mentoring peers.
• Excellent English communication and documentation.

Responsibilities

• Design, develop, and maintain scalable backend services using Go with emphasis on code quality and maintainability.
• Integrate with third-party payment services (banks, e-wallets) and handle edge cases.
• Write robust unit and integration tests for new features and ensure validation of critical payment flows.
• Collaborate with product, infra, and QA to define, design, and ship features.
• Mentor junior and mid-level engineers through code reviews and design discussions.
• Lead by example with clean architecture, documentation, and observability practices.
• Identify and resolve performance bottlenecks and improve system resilience.
• Stay current with new technologies and propose business-aligned improvements.
• Build software with security and auditing in mind.
• Deploy applications to AWS and support operational readiness.

Skills

Go

Backend design

API integration

PostgreSQL

Redis

Testing

Security

Leadership

Agile practices

English

Education

Bachelor's degree in Computer Science

Job description

Xenith is a B2B fintech platform seeking an experienced Go backend engineer. You will design, build, and maintain scalable services, integrate with payment providers, and ensure robust tests and security.

You will mentor engineers and uphold clean architecture while delivering high-impact features for a fast-growing fintech environment. You will collaborate across product, infra, and QA to ship reliable payments software, deploy on AWS, and drive observability and performance improvements.