Back End Engineer - Core Payment

Sigillum Fides Technology Pte Ltd; Indonesia; Remote; IDR 300,000,000 - 375,000,000; Full time

Benefits offered by this job

Fully remote

AI-first culture

Growth opportunities

End-to-end ownership

Flexible APAC remote work

Job summary

Sigillum Fides Technology Pte Ltd is hiring a Back-End Engineer for Core Payments, operating remotely across the Asia-Pacific region. You will design and own payment infrastructure, build scalable Go services, and ensure robust data models and ledger accounting logic.

You will lead architecture decisions, mentor colleagues, and collaborate with product teams to deliver end-to-end payment features across PSPs, acquirers, and wallets. A strong emphasis on async collaboration and scalable systems.

Qualifications

• 3–7+ years of back-end development experience.
• Deep hands-on expertise in Golang — production-grade, idiomatic Go.
• Strong command of PostgreSQL — schema design, complex queries, indexing, transactions.
• Proven experience with REST API design and microservices architecture.
• Track record of delivering in a fully remote, async environment.

Responsibilities

• Design and maintain scalable back-end services in Golang.
• Build and optimize data models and queries in PostgreSQL.
• Architect and maintain ledger accounting logic (double-entry, reconciliation, balance tracking).
• Lead development of dynamic routing logic for multi-gateway payment flows.
• Collaborate with front-end and product teams to deliver end-to-end payment features.
• Integrate and maintain payment APIs (PSPs, acquirers, wallets).
• Drive code quality through reviews, standards, and best practices.

Skills

Golang

PostgreSQL

REST API design

Microservices

Remote work (async)

Education

Bachelor's degree in Computer Science or related field

Job description

We're Hiring: Back-End Engineer – Core Payments (Mid to Senior Level) | Remote

Are you a seasoned Go developer passionate about fintech and ready to own infrastructure that moves real money across borders? Sigillum Fides Technology is looking for an experienced Back-End Engineer to join our growing Core Payments team.

We're an AI-driven software company revolutionizing financial operations across the Asia-Pacific region — bridging traditional finance with next-generation digital payment platforms.

What You'll Own

You'll be a key driver in designing and maintaining the backbone of our payment infrastructure — ledger systems, dynamic transaction routing, and real-time payment processing at scale. You'll be expected to lead technically, make architectural decisions, and mentor where needed.

• Design and develop scalable back-end services in Golang
• Build and optimize data models and queries in PostgreSQL
• Architect and maintain ledger accounting logic (double-entry, reconciliation, balance tracking)
• Lead development of dynamic routing logic for multi-gateway payment flows
• Collaborate with front-end and product teams to deliver end-to-end payment features
• Integrate and maintain payment APIs (PSPs, acquirers, wallets)
• Drive code quality through reviews, standards, and best practices

What We're Looking For

Must-Have:

• 3–7+ years of back-end development experience
• Deep hands-on expertise in Golang — you write production-grade, idiomatic Go
• Strong command of PostgreSQL — schema design, complex queries, indexing, transactions
• Proven experience with REST API design and microservices architecture
• Track record of delivering in a fully remote, async environment

Nice to Have:

• Hands-on experience with ledger systems or financial accounting logic
• Deep familiarity with payment gateways, acquiring banks, or PSP integrations
• Experience designing transaction routing, failover logic, or multi-currency flows
• Experience with message queues (Kafka, RabbitMQ) or event-driven architecture
• Background in high-risk merchant processing or compliance-aware payment flows
• APAC fintech or banking domain knowledge

Education

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

Why Sigillum Fides Technology?

• Fully remote — work from anywhere in the region
• Greenfield and impactful — own systems end-to-end, not just maintain them
• Small, sharp team where your decisions shape the architecture
• AI-first culture — we build smart, not just fast
• Fast growth trajectory with paths into tech lead and principal engineer roles
• Salary Annual: IDR 300,000,000 – 375,000,000/year Nett After Tax (No relocation support, Full remote)

• We review every application. No recruiters, please.