Mid-level Back-end Developer

PNI Business Solutions, Inc.; Pasig; On-site; PHP 600,000 - 900,000; Full time

Job summary

PNI Business Solutions, Inc. seeks a Mid-Level Back-End Developer to design, implement, and optimize Node.js/TypeScript micro-services powering our lending, transaction, user management, and notification modules on AWS.

You will collaborate with mobile and admin-portal teams to deliver secure, scalable solutions, write automated tests, and ensure robust data modeling in MySQL on AWS RDS. This role requires 3–5 years of experience, strong coding standards, and proactive problem solving.

Qualifications

• 3–5 years of professional back-end development experience.
• Strong proficiency in Node.js (version 20 or later) and TypeScript.
• Production experience developing REST APIs using Express or a similar framework.
• Solid knowledge of relational databases, particularly MySQL or PostgreSQL, including schema design, indexing, transactions, and query optimization.

Responsibilities

• Develop, maintain, and enhance back-end services that connect lenders and borrowers, including lender profiles, loan configurations, and loan discovery features
• Manage the loan lifecycle, including applications, approvals, disbursements, repayment schedules, extensions, overdue accounts, and demand letters
• Build lender-facing features for cash bond balances, transaction histories, loan portfolios, outstanding balances, and payment tracking
• Implement accurate interest, service charge, and convenience charge calculations, supported by automated tests covering edge cases and rounding
• Develop reliable payment processing workflows and integrations with payment partners
• Design and optimize relational databases using MySQL 8 on AWS RDS, including schema design, SQL queries, and safe database migrations
• Design, develop, and maintain REST APIs using Node.js, TypeScript, and Express across lending, transaction, user, partner, notification, messaging, and admin services
• Implement event-driven communication between micro-services using Kafka, with versioned and documented message contracts
• Develop and maintain unit and integration tests using tools such as Mocha, Chai, and Supertest
• Package and deploy services using Docker and AWS CodeBuild/CodeDeploy to EC2 environments behind load balancers

Skills

Node.js

TypeScript

REST APIs

Express

Tools

MySQL

PostgreSQL

AWS

Docker

Kafka

RDS

Job description

About the role

We are looking for a Mid-Level Back-End Developer to develop, maintain, and optimize the Node.js/TypeScript micro-services that power our platform. You will work primarily on lending, transaction, user management, and notification services, collaborating closely with our mobile and admin-portal development teams to deliver reliable, secure, and scalable solutions on AWS.

Key responsibilities

• Develop, maintain, and enhance back-end services that connect lenders and borrowers, including lender profiles, loan configurations, and loan discovery features
• Manage the loan lifecycle, including applications, approvals, disbursements, repayment schedules, extensions, overdue accounts, and demand letters
• Build lender-facing features for cash bond balances, transaction histories, loan portfolios, outstanding balances, and payment tracking
• Implement accurate interest, service charge, and convenience charge calculations, supported by automated tests covering edge cases and rounding
• Develop reliable payment processing workflows and integrations with payment partners
• Design and optimize relational databases using MySQL 8 on AWS RDS, including schema design, SQL queries, and safe database migrations
• Design, develop, and maintain REST APIs using Node.js, TypeScript, and Express across lending, transaction, user, partner, notification, messaging, and admin services
• Implement event-driven communication between micro-services using Kafka, with versioned and documented message contracts
• Develop and maintain unit and integration tests using tools such as Mocha, Chai, and Supertest
• Package and deploy services using Docker and AWS CodeBuild/CodeDeploy to EC2 environments behind load balancers

About you

• 3–5 years of professional back-end development experience
• Strong proficiency in Node.js (version 20 or later) and TypeScript, including asynchronous programming, error handling, and application architecture
• Production experience developing REST APIs using Express or a similar framework
• Solid knowledge of relational databases, particularly MySQL or PostgreSQL, including schema design, indexing, transactions, and query optimization
• Hands-on experience with Kafka, RabbitMQ, or a similar event or message broker
• Experience implementing authentication and API security, including JWT, OTP, request validation, and OWASP security practices
• Practical experience with Docker and deploying or troubleshooting applications on AWS, including EC2, RDS, S3, and load balancers
• Experience writing automated tests and working with Git-based version control and pull request workflows
• Good written communication skills in English and the ability to collaborate effectively with mobile and front-end developers