Software Engineer (Go/C#/Typescript/Python)

Flexisource IT; Makati; On-site; PHP 1,200,000 - 1,680,000; Full time

Job summary

Flexisource IT in Makati is seeking a Backend Software Engineer to design and scale core payment platform systems, ensuring reliability, security, and high performance in a fintech context. You will collaborate with cross-functional teams to deliver scalable solutions, maintainable code, and strong observability, under regulatory and high-availability requirements.

Remote work is available until further notice, with overlapping PH business hours.

Qualifications

• 5+ years of backend software engineering experience.
• Experience in fintech/payments and regulated, high-availability systems.
• Proven ability to deliver production-ready backend services.

Responsibilities

• Design, build, and maintain scalable backend services and APIs for payment processing, reconciliation, and settlement.
• Write clean, maintainable, and well-tested code following engineering best practices.
• Support microservices-based architectures and improve system performance, resilience, and observability.

Skills

Backend development

Fintech domain

Microservices

Cloud platforms

SQL/NoSQL

Docker

Kubernetes

Git

CI/CD

Security/compliance

Tools

Docker

Kubernetes

Git

AWS

Job description

As a Backend Software Engineer, you will play a key role in building and scaling the core systems that move, reconcile, and record funds across Company’s payment platform. Working within a fast-growing fintech environment, you will contribute to the development of reliable, secure, and high-performing backend services that support a rapidly expanding customer and transaction base

You will collaborate closely with cross-functional teams to deliver scalable solutions, while continuously improving system performance, resilience, and maintainability in a regulated, high-availability environment

Success in this role will be reflected in your ability to deliver high-quality backend services that support the stability and scalability of payment systems as the business grows. You will contribute to building robust, well-tested, and maintainable code that underpins critical transaction flows, helping to reduce production issues and improve overall system reliability

Over time, your impact will be seen through improved system performance, reliability, and your contribution to a strong engineering culture that values clean architecture, collaboration, and continuous improvement. You will also play a role in ensuring backend systems meet security and compliance expectations, supporting a seamless and trusted customer experience

Key Responsibilities

• Design, build, and maintain scalable backend services and APIs supporting payment processing, reconciliation, and settlement systems.


• Write clean, maintainable, and well-tested code following engineering best practices


• Support the design and evolution of microservices-based architectures


• Contribute to system design discussions, focusing on scalability, reliability, and performance


• Assist in improving system resilience, fault tolerance, and observability


• Contribute to unit, integration, and end-to-end testing of backend services


• Support the improvement of automated testing practices and code quality standards


• Participate in code reviews to ensure high-quality, consistent engineering output


• Build systems with performance and scalability in mind for high-volume payment environments


• Ensure secure coding practices and support compliance with industry standards (e.g. PCI-DSS)


• Work with payment messaging standards (e.g. ISO 20022) to integrate with banking and payment partners for fund movement and reconciliation


• Assist in monitoring, debugging, and resolving production issues

Requirements

Experience

• 5+ years of backend software engineering experience


• Solid background in fintech, payments, banking, or financial services


• Experience in regulated, high-availability systems where correctness and auditability are first-order concerns


• Demonstrated ability to deliver production-ready backend services

Technical / Soft Skills

• Strong problem-solving skills with genuine attention to detail - especially around numerical and financial correctness


• Understanding of microservices architecture and distributed systems


• Familiarity with cloud platforms (AWS, GCP, or Azure)


• Experience with databases (SQL and/or NoSQL)


• Familiarity with CI/CD pipelines and version control (Git)


• Knowledge of containerisation (Docker, Kubernetes)


• Eagerness to learn and grow within a scaling engineering environment


• Good communication skills and ability to articulate technical concepts


• Shift: Monday to Friday: 6:00am- 3:00pm or 7:00am- 4:00pm PH Time; depending on business needs


• Location: Makati | *Work from Home Until Further Notice