Open to opportunities

Wisnu Nugraha

@wisnunugraha

Senior backend developer specializing in scalable, high-performance REST APIs and microservices for fintech and logistics.

Indonesia

Message

What I'm looking for

I’m looking for a role where I can design scalable, high-performance backend systems and REST APIs, build microservices and event-driven services, and strengthen reliability through clean architecture, database optimization, and DevOps automation.

I’m a Senior Backend Developer with 7+ years of experience designing and delivering scalable, high-performance backend systems and REST APIs across fintech, logistics, e-grocery, and on-demand services. I’ve consistently pushed performance improvements—reducing API response time by up to 40% and helping systems handle 2,500+ concurrent users.

My work centers on microservices architecture, event-driven systems, and reliable integrations. I’ve built high-concurrency reconciliation and real-time streaming services using Pub/Sub with Rust, and I’ve delivered payment and third-party API integrations (including Midtrans, DOKU, DANA, and Google Maps) that improved operational outcomes and reduced failure rates.

I also lead backend teams of 3–6 engineers and bring strong delivery discipline through Agile/Scrum and clean architecture. From optimizing database performance (including stored procedures and query tuning) to improving deployment speed with Docker, Kubernetes (Rancher), and CI/CD, I focus on building systems that stay fast, observable, and dependable in production.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Developer

Current

PT. Mekar Investama Teknologi

May 2024 - Present (2 years 2 months)

Develops and maintains core backend services for a P2P lending platform, including loan origination, fee processing, invoice financing, and financial reconciliation workflows. Builds high-concurrency event-driven reconciliation services and optimizes database and API performance.

Python Django REST Framework Rust PostgreSQL Docker Portainer Pub Sub Celery

Freelance Backend Dev - Asset Mgmt

PT. Mekar Investama Teknologi

Apr 2026 - May 2026 (1 month)

Develops Django REST Framework APIs for an asset management system with optimized PostgreSQL schema design. Implements multi-asset/user management with role-based access and automates asset-change requests and tagging workflows.

Django Django REST Framework PostgreSQL

Freelance Backend Dev - Telegram Bot

PT. Mekar Investama Teknologi

Mar 2026 - Apr 2026 (1 month)

Integrates the Qwen AI API for intelligent data validation and JSON normalization. Builds Django REST APIs for multi-party agreement document generation and deploys the production system.

Django Django REST Framework PostgreSQL

Freelance Backend Dev - OCR Integration

PT. Mekar Investama Teknologi

Jun 2025 - Aug 2025 (2 months)

Builds an OCR-based document automation service for high-accuracy field extraction. Integrates OpenAI GPT API for validation and JSON normalization and exposes functionality via Django REST APIs.

Django Django REST Framework PostgreSQL OpenAI API

Freelance Backend Dev - EWA Loan

PT. Mekar Investama Teknologi

Jan 2025 - Apr 2025 (3 months)

Architects a multi-tenant EWA loan generation engine with configurable partner-specific eligibility rules. Builds a clean-architecture Django backend and designs the loan agreement lifecycle for application through repayment tracking.

Django Django REST Framework PostgreSQL Stored Procedures

Senior Backend Developer (Remote)

Logistics & IoT Platform

Sep 2023 - May 2024 (8 months)

Designs and maintains RESTful APIs for rack management and storage services for real-time IoT data ingestion. Implements real-time streaming subscribers and automated incident notifications for truck logistics operations.

MySQL Kafka

Senior Backend Developer

PT. Kreatifitas Belanja Indonesia (Klabbelanja)

Mar 2023 - Aug 2023 (5 months)

Architects and leads backend API infrastructure for an e-grocery/on-demand platform supporting daily active users. Integrates payment and delivery tracking services and sets up a Docker + Rancher (Kubernetes) DevOps pipeline.

Socket.IO Redis PostgreSQL Docker Rancher Portainer

Backend Developer

PT. Hayuq Systems Indonesia (Hayuq)

Sep 2022 - May 2023 (8 months)

Builds backend services for user, partner, and driver modules and develops real-time Socket.io features. Implements CI/CD with Docker and Rancher Kubernetes and integrates geolocation-based driver matching.

PostgreSQL MongoDB Redis Socket.IO GeoLib Docker Kubernetes: Rancher

Backend Developer

Halalfresh

Nov 2020 - Feb 2022 (1 year 3 months)

Designs and builds RESTful backend APIs for admin dashboard and user management. Integrates multiple payment gateways and manages GCP Compute Engine infrastructure while improving CI/CD and optimizing MariaDB query performance.

Laravel MariaDB CI CD

Web & Backend Developer

Danasyariah.id

Oct 2018 - Oct 2020 (2 years)

Builds and maintains core web modules for fintech/P2P lending, including admin dashboards, borrower transaction flows, loan simulation engines, and reporting. Develops borrower APIs and a transaction simulation engine while managing internal IT infrastructure.

Laravel Lumen jQuery MariaDB