Backend Architecture
Service boundaries, data flow and module design that keep long-lived systems maintainable as they grow.
Open to backend engineering opportunities
Building Scalable Systems. Engineering Reliable Solutions.
I'm Hendriatna, a Senior Backend Developer and System Engineer specializing in scalable backend architectures, secure REST APIs, enterprise applications, and high-performance systems.
system-architecture · request flow
services/auth/views.py
class TokenObtainView(APIView):
# authenticated once, trusted everywhere
def post(self, request):
serializer = LoginSerializer(data=request.data)
serializer.is_valid(raise_exception=True)
return Response(serializer.tokens())10+ years
Software development experience
Backend & API Engineering
Enterprise Application Development
Digital Banking Systems
Profile
About Me
I'm a Senior Backend Developer and System Engineer with over 10 years of experience in software development, enterprise application engineering, and digital banking systems.
My expertise includes designing scalable backend architectures, developing secure RESTful APIs, database optimization, authentication systems, and third-party service integrations.
Throughout my career, I have worked on enterprise banking applications, education technology platforms, recruitment systems, and billing management solutions.
I enjoy solving complex technical problems and building reliable systems that deliver real business value.
10+ years in software development
Authentication & access control
Database performance
Key competencies
REST API Development
Readable, consistent and versioned APIs built with Django REST Framework, Spring Boot and Laravel.
Database Optimization
Schema design, indexing strategies and query tuning for relational databases at production scale.
Authentication & Authorization
JWT, Basic Authentication and Spring Security applied to access control across services and clients.
System Integration
Payment gateways, messaging workflows and third-party platforms integrated behind stable contracts.
Performance Engineering
Caching layers, profiling and production debugging to keep response times predictable under load.
Technical Skills
Technical Skills
Grouped by engineering domain rather than by percentage. Each group reflects tools used to design, build and operate production backend systems.
Programming Languages
Primary languages used across backend services and tooling.
Backend Frameworks
Frameworks used to deliver production APIs and enterprise services.
Frontend
Enough frontend depth to deliver and integrate full features.
Database & Caching
Relational modelling, tuning and in-memory caching.
DevOps & Infrastructure
Runtime, delivery and server environments for backend systems.
Architecture & Security
Integration patterns and access control applied in production.
Featured Projects
Systems built for real operations
Enterprise authentication, education platforms, recruitment services and digital banking backends — with the engineering decisions behind each one.
Enterprise Authentication & Authorization
SSO System — Centralized Authentication Service
A centralized Single Sign-On service that unifies authentication and authorization across every application in a product ecosystem.
- Centralized authentication across multiple applications.
- Designed for a stated capacity of up to 1 million concurrent users.
Education Technology Platform
2022 — 2026
LuarSekolah Platform
Backend infrastructure and APIs powering online classes, webinars and digital learning for a nationwide education platform.
- Reusable API foundation shared by web and mobile clients.
- Redis caching layer applied to high-traffic read paths.
Recruitment & Career Platform
2022 — 2026
Japan Tech Career Platform
Core backend API services for a recruitment platform connecting candidates with technology careers in Japan.
- Backend API layer designed and delivered from an empty codebase.
- Third-party recruiting tooling integrated behind stable internal endpoints.
Enterprise Digital Banking
2019 — 2021
OCBC NISP — Internet & Mobile Banking
Enterprise Java backend services supporting internet and mobile banking journeys for critical financial transactions.
- Backend services built for high-integrity financial transactions.
- Spring Security used to enforce authentication and authorization rules.
Enterprise BackOffice & Billing
2015 — 2016
Paybil — BackOffice & Billing Management System
BackOffice and billing management system supporting payment operations, from requirements gathering through deployment.
- Delivered billing and back office workflows from requirements through deployment.
- Automated test scripts prepared to validate core billing logic.
Career
Professional Experience
A decade of backend engineering across digital banking, education technology and enterprise platforms.
-
Senior System Engineer
October 2022 – June 2026PT Teknologi Edukasi Indonesia (LuarSekolah) Indonesia
- Designed scalable backend architectures.
- Developed secure REST APIs using Django REST Framework.
- Optimized database performance using Redis and indexing.
- Implemented JWT and Basic Authentication.
- Containerized backend applications using Docker.
- Integrated payment gateways and messaging services.
-
System Analyst
May 2019 – September 2021PT Bank OCBC NISP Tbk Indonesia
- Developed enterprise RESTful API microservices.
- Worked with Java and Spring Boot.
- Managed Oracle Database.
- Optimized queries and database schemas.
- Managed application build configurations using Maven.
-
Java Web Developer
September 2016 – May 2019PT Informasi Teknologi Indonesia Indonesia
- Developed Internet Banking and BackOffice applications.
- Worked with Java and Spring Framework.
- Designed Oracle database schemas and stored procedures.
- Implemented Spring Security.
- Performed production debugging and performance tuning.
-
Java Web Developer
October 2015 – September 2016PT Pilar Bina Cakrawala (Paybil) Indonesia
- Developed Java application logic.
- Participated in requirements gathering.
- Supported testing and deployment.
Education
Diploma 3 — Information Management
Pasim National University
Contact
Let’s Build Something Great Together.
I'm always interested in discussing backend engineering opportunities, enterprise software development, system architecture, and freelance projects.
Send a message
Share a few details about the role or project and I will reply directly.