Senior Backend Engineer - FinTech Platform & Lending

Fintonia Group; Kuala Lumpur; On-site; MYR 180,000 - 240,000; Full time

Job summary

Fintonia Group in Kuala Lumpur is seeking a Senior Backend Engineer to own the platform behind lending, custody, and risk systems. You will build and maintain six Python services, work in an event-sourced ledger, and drive API design for the TypeScript frontend.

This hands-on role covers deployment, CI/CD, AWS, Docker, and Terraform, with revenue and regulatory considerations. You will collaborate with the Head of Engineering and Lending to ensure precision in financial calculations and robust

Qualifications

• Degree in Computer Science, Engineering, or a related discipline.
• Minimum 5 years of experience building production backend systems, ideally within financial infrastructure: trading, exchange, brokerage, clearing, payments, or risk.
• Strong Python engineering; the current stack is FastAPI, SQLAlchemy, and Pydantic.
• Demonstrated experience building with AI coding tools, and the judgment to apply appropriate review standards to AI-assisted work.
• Hands‑on ownership of deployment and CI/CD: AWS, Docker, infrastructure as code, and release pipelines.
• Production‑depth PostgreSQL experience, including schema design, migrations, and concurrency.
• Rigour in numerical precision for financial systems; decimal arithmetic throughout, never floating point.
• Ability to work from a written specification and raise contradictions in it rather than implement them.
• Experience with event‑driven or event‑sourced architectures preferred.
• Exposure to order management, execution, or market data systems preferred.
• Exposure to digital asset infrastructure — custody, exchange APIs, on‑chain settlement — preferred but not required.
• Lending, margin, or credit domain knowledge is not required; product expertise sits with the Head of Lending.

Responsibilities

• Architect and implement backend systems for LMS and PMS across multiple services.
• Maintain an event-sourced ledger to ensure data integrity for downstream figures.
• Develop loan origination, drawdown, amendment, and repayment logic per product specs.
• Design and maintain APIs for the TypeScript frontend via generated OpenAPI types.
• Implement pricing, margin calls, collateral, and liquidation triggers and related workflows.
• Own CI/CD pipelines, deployments to AWS, Docker, Terraform, and release gates.

Skills

Python

AI tools

OpenAPI

CI/CD

AWS

Docker

Education

Bachelor's in CS/Engineering

Tools

FastAPI

SQLAlchemy

Pydantic

PostgreSQL

Docker

AWS

Terraform

OpenAPI

Job description

Fintonia Group in Kuala Lumpur is seeking a Senior Backend Engineer to own the platform behind lending, custody, and risk systems. You will build and maintain six Python services, work in an event-sourced ledger, and drive API design for the TypeScript frontend.

This hands-on role covers deployment, CI/CD, AWS, Docker, and Terraform, with revenue and regulatory considerations. You will collaborate with the Head of Engineering and Lending to ensure precision in financial calculations and robust