Available
Doni Putra Purbawa
Cloud Architect & Senior Backend Engineer | AWS, Fintech, Cloud & AI
Designing AWS cloud architecture and reliable backend platforms for fintech, SaaS, and AI-powered products. 6+ years turning complex requirements into production-grade systems.
Core Expertise
Focused on cloud architecture, backend platforms, and production reliability
Cloud Architecture
Designing AWS production environments with EC2, RDS, S3, CloudFront, IAM, observability, and CI/CD foundations.
Backend Platforms
Building scalable REST APIs, microservices, and gRPC services with Node.js, Java, Golang, and PostgreSQL.
Payment Systems
Stripe, PayPal, GMO, Square integrations with subscription billing, webhook processing, and reconciliation.
AI-Powered Applications
LLM orchestration with OpenAI and Gemini, RAG pipelines, vector search, and ML model deployment.
Featured Projects
Selected case studies from production systems
Trajectory AI Chatbot for Drone Flight Route Reservations
Conversational AI platform built for Trajectory's drone flight operations, helping operators query flight areas, routes, and reservation schedules through Rocket.Chat, Amazon Lex V2, and Go-based backend services.
i-Nose C-19 ML Model
Deep learning model for non-invasive COVID-19 detection using electronic nose sensor arrays, deployed for edge inference on Raspberry Pi.
Latest Articles
Technical writing on backend, cloud, and AI
Designing Reliable Payment Webhooks for Production Systems
Learn how to design idempotent, resilient webhook handlers for Stripe, PayPal, and GMO that survive retries, network failures, and race conditions.
How I Structure Backend Services with Microservices and gRPC
A practical guide to designing microservices communication with gRPC, including service discovery, error handling, and the lessons learned from production systems.
Practical AWS Architecture for Small Engineering Teams
How to build a cost-effective, production-ready AWS setup for a startup or small team — covering EC2, RDS, S3, IAM, and the monitoring stack that actually matters.
Professional Highlights
A snapshot of what I bring to engineering teams
- Cloud architecture for production SaaS workloads on AWS
- 6+ years backend and platform engineering experience
- Hands-on infrastructure design across EC2, RDS, S3, CloudFront, IAM, and CI/CD
- Payment gateway integrations across 4 providers
- LLM integrations and ML research published in Q1 journal
- Engineering Manager leading a team of 6 engineers
- Open to Japan relocation — JLPT N4
Open to Opportunities
I'm available for cloud architect, senior backend, or platform engineering roles — remote or relocating to Japan. Let's talk about how I can help your team design and ship reliable systems.