Hendry Zheng
Backend, API Gateway & Software Consultant — Singapore, Malaysia, Indonesia
I design, migrate, and optimize API platforms and software systems for fintech and SaaS. My focus is on practical, reliable engineering — from backend infrastructure to complete app ecosystems.
Core Expertise
- • API Gateway design & migration (KrakenD, Tyk, Kong)
- • API modernization & OpenAPI standardization
- • Node.js / TypeScript / PHP backend optimization
- • Distributed system reliability & chaos testing
- • Mobile App Development (React Native / Ionic)
- • Web App Development (Next.js / Laravel / Vue)
- • Secure API design (JWT, signed payloads, rate limiting)
- • Process automation & workflow orchestration
- • Financial systems & loan processing workflows
- • Third-party API integration & data synchronization
- • ETL pipelines & data transformation
- • Business process digitization & legacy system modernization
- • Event-driven architecture & message queuing (RabbitMQ, Kafka)
- • Disaster Recovery (Tyk, PostgreSQL, Redis)
Service Offerings
Microservices Setup
Build or migrate your systems into scalable, maintainable microservices — with clear APIs, automated deployment, and monitoring built-in.
API Gateway Audit
~2 weeks — Assessment report + recommendations
Migration / Setup
Hands-on migration to KrakenD / Tyk — Delivery + docs
Mobile App Development
Cross-platform (iOS & Android) app design and development using React Native / Ionic
Web App Development
Full-stack web development with modern frameworks (Next.js, Laravel, Vue)
Digitalise Manual Operations into Automation Engineering
Transform manual processes into automated systems with streamlined workflows and reduced human error
Loan Management System
End-to-end loan processing systems with application tracking, approval workflows, and payment management
Backend End-to-End Integration
Complete backend system integration connecting multiple services, databases, and third-party APIs
Reliability & DR
HA & DR design, monitoring, and validation
Selected Projects
- Fintech Gateway Migration — Migrated from custom Express gateway to KrakenD; improved scalability and observability.
- Network Operations API (CSET) — Modernized legacy APIs for gateway onboarding and network analytics.
- Customer Self-Service Platform (BSS) — Unified multiple customer APIs under a single API gateway for better user experience.
- Disaster Recovery (Tyk Ecosystem) — Architected DR for gateway, dashboard, pump, and portal.
- Gateway Proxy Release Testing — Designed percentage-based traffic rollout strategies and test plans.
- Velintech Client Apps — Delivered end-to-end mobile & web app solutions for SMEs and enterprises.
Engagement Model
Project-based or short-term consulting. Remote collaboration preferred. Optional retainer for maintenance.
Contact
Prefer email for initial contact. I respond to concise project descriptions (scope, timeline, and preferred collaboration model).