Go Backend Engineer — Fintech APIs & PostgreSQL

Konnco; Kota Yogyakarta; On-site; IDR 96,000,000 - 144,000,000; Full time

Job summary

Konnco is seeking a Backend Engineer (Go) with 1-2 years of fintech experience to design, build, and maintain backend services that handle financial transactions with high reliability and data integrity.

You will design REST APIs and gRPC services, optimize PostgreSQL schemas, implement caching, containerize with Docker, and contribute to testing, reviews, and documentation to keep our fintech backend robust and scalable.

Qualifications

• 1-2 years of backend engineering experience, preferably in fintech.
• Strong PostgreSQL skills, including schema design, query optimization, transactions, and migrations.
• Familiar with caching using Redis or equivalent, along with REST and gRPC API design.
• Comfortable working with Docker for containerized services.
• Solid Git workflow, including branching, pull requests, and code review.
• Understands fintech engineering practices such as idempotency, decimal precision for monetary values, audit logging, and safe concurrent transactions.
• Good communicator, proactive in flagging blockers, and open to learning new technologies.

Responsibilities

• Design, build, and maintain backend services in Go
• Design and implement REST APIs and gRPC services for internal and external consumers
• Model and optimize PostgreSQL schemas, queries, and migrations
• Implement caching strategies to improve latency and reduce database load
• Containerize services with Docker and support deployment pipelines
• Ensure data integrity, idempotency, and correct handling of financial transactions
• Write tests, participate in code reviews, and contribute to technical documentation

Skills

Go backend

PostgreSQL

Caching (Redis)

Git workflow

REST API design

gRPC

Tools

PostgreSQL

Docker

Redis

Git

Job description

Konnco is seeking a Backend Engineer (Go) with 1-2 years of fintech experience to design, build, and maintain backend services that handle financial transactions with high reliability and data integrity.

You will design REST APIs and gRPC services, optimize PostgreSQL schemas, implement caching, containerize with Docker, and contribute to testing, reviews, and documentation to keep our fintech backend robust and scalable.