Mid-Level Backend Engineer - Node.js/TypeScript

THINK SIMPLICITY CORP.; Pasig; On-site; PHP 700,000 - 1,500,000; Full time

Job summary

Think Simplicity Corp. in the Philippines is hiring a mid-level backend developer to build and run Node.js/TypeScript microservices behind our lending app. You will work with Flutter mobile and Next.js admin teams and ship to production on AWS.

Design robust APIs, model data in MySQL, and ensure secure, auditable money-movement flows with partners. Strong TS/Node skills and SQL proficiency are essential.

Qualifications

• 3-5 years of professional backend development experience.
• Strong TypeScript and Node.js (v20+), including async patterns, error handling and project structure.
• Production experience building REST APIs with Express or a similar framework.
• Solid relational database skills in MySQL or PostgreSQL: schema design, indexing, transactions and query tuning.
• Hands-on experience with an event or message broker (Kafka, RabbitMQ or similar).
• Experience with authentication and API security: JWT, OTP, request validation and OWASP basics.
• Comfortable with Docker and deploying on AWS (EC2, RDS, S3, load balancers).
• Writes automated tests and follows Git-based PR workflows.
• Familiar with AI-assisted coding tools and responsible code review.

Responsibilities

• Build and maintain the services that match lenders and borrowers: lender profiles, published loan configurations and their constraints, and borrower-facing loan discovery.
• Own the loan lifecycle end to end: application, approval, disbursement, repayment schedules, extensions, overdue handling and demand letters.
• Build lender tools: cash bond balance and history, portfolio and outstanding balance views, and payment history.
• Design, build and maintain REST APIs in Express + TypeScript across the lending, transaction, user, partner, notification, messaging and admin services.
• Publish and consume events on Kafka between services and keep message contracts versioned and documented.
• Build real-time features with Socket.IO for live chat and ticket updates.
• Configure routes on the KrakenD API gateway and document endpoints with Swagger/OpenAPI.
• Deliver push notifications and SMS for loan events and OTPs.
• Maintain audit trails and ensure data privacy in line with regulations.

Skills

TypeScript

Node.js

REST API design

SQL / MySQL

Docker

AWS

Testing (Mocha/Chai)

Security & OWASP

CI/CD

Communication

Tools

Express.js

Kafka

Socket.IO

Docker

MySQL

RabbitMQ

KrakenD/OpenAPI

AWS (EC2/RDS)

Job description

Think Simplicity Corp. in the Philippines is hiring a mid-level backend developer to build and run Node.js/TypeScript microservices behind our lending app. You will work with Flutter mobile and Next.js admin teams and ship to production on AWS.

Design robust APIs, model data in MySQL, and ensure secure, auditable money-movement flows with partners. Strong TS/Node skills and SQL proficiency are essential.