01/
Core stack
Production foundations
The tools I reach for first. Daily drivers, load-bearing, no warm-up needed.
- Java
- Spring Boot
- C#
- ASP.NET
- Python
- FastAPI
- TypeScript
- React
- Angular
- Node.js
- REST APIs
- SQL databases
- Docker
- Linux (RHEL)
- Git
- CI/CD
Senior Full Stack DeveloperCyberjaya, Malaysia
ManimaranMahesan.
Backend-leaning engineer who owns the whole line — from the schema to the RHEL box it runs on.
01Profile
Four years building production systems across web, desktop, and mobile.
Backend-leaning by instinct. Java and Spring Boot, C# and .NET, Python and FastAPI — services backed by PostgreSQL, MySQL and MSSQL, designed so the data layer holds even when the application layer is wrong.
Front end is not an afterthought. React, Angular and TypeScript, wired to the same APIs I design, so the contract between the two is never a guess.
Day-to-day ownership of the environments this runs in: RHEL servers, Docker deployments, CI/CD pipelines, and root-cause analysis on live defects — shipping the fix and the prevention, not the surface patch.
Complete systems delivered independently, including a commercially licensed POS platform and an LLM-integrated research application with enforced tool and database boundaries.
- Experience
- 4 years
- Platforms
- Web / Desktop / Mobile
- Based in
- Cyberjaya, MY
- Focus
- Backend & systems
02Expertise
Engineered for production.
Three tiers, honestly ranked. What I build with daily, what I have shipped, and where I keep the guardrails tight.
02/
Experienced
Systems & delivery
Shipped to production in real projects. Reached for when the problem calls for it.
- Next.js
- React Native
- Electron
- WebSockets
- Microservices
- JWT/RBAC
- Prisma
- Firebase
- Nginx
- AWS
- Tailwind CSS
03/
AI engineering
Bounded intelligence
LLM features built around reliability, control and explicit trust boundaries — the model never gets more reach than the task needs.
- Allowlisted read-only tool calling
- Provider routing & failover
- Anthropic
- OpenAI
- Gemini
- Groq
- Ollama
- RAG
- Database-level boundaries
03Experience
Systems shipped. Problems solved.
- May 2025 — PresentContract
Infomina Berhad
Senior Full Stack Developer
Own delivery of full-stack features across web, Windows desktop and mobile, from design through production deployment and ongoing support.
- Design and build backend services and REST APIs in Java Spring Boot, Node.js and FastAPI, selecting the appropriate stack per service, with Angular and TypeScript on the front end.
- Introduced Redis caching over MySQL to cut database load on read-heavy endpoints and improve response times.
- Maintain RHEL production servers: containerise applications with Docker, automate operational tasks in Shell, and act as escalation point for live defects across application and infrastructure layers.
- Diagnose production incidents through log analysis and root-cause investigation, then ship fixes and preventive changes rather than surface patches.
- Built desktop and automation tooling with Electron and Python Tkinter, integrating OCR and automated number plate recognition to replace manual data entry.
- Use AI-assisted development for prototyping, refactoring and test scaffolding, with review and testing before anything reaches production.
- Java
- Spring Boot
- Angular
- Node.js
- FastAPI
- Redis
- Docker
- RHEL
- March 2023 — May 2025Permanent
Consolsys Sdn. Bhd.
Software Engineer
Maintained and extended backend services and web applications, taking features from requirement through release.
- September 2022 — February 2023Full-time
Protech Digital
Application Developer
Developed application features and backend components against relational databases.
04Selected work
Built beyond the brief.
Five systems, each solving a problem that only shows up once the thing is actually in production.
5 projects
- 01AI / Fintech
AI Trader
Market Research & Trading Simulation Platform
A self-hosted workspace for researching market data, practising trade execution against historical data, and keeping a trade journal — built as a multi-service system rather than a chat wrapper.
- FastAPI
- TimescaleDB
- LLMs
- 02Desktop / Security
Enterprise POS System
POS System & ERP Software
A commercially licensed point-of-sale product for retail tills: cashier terminal, dual-screen customer display, inventory with expiry tracking, shift and cash-drawer management, and reporting.
- Electron
- Spring Boot
- AES-256
- 03Mobile / Cloud POS
Papercup
Multi-Store Cloud POS Platform
A cloud point-of-sale system for a cafe business: a React Native app on store devices for sales and shifts, plus a web dashboard for managing stores, staff, inventory and reporting.
- React Native
- Firebase
- Offline-first
- 04Platform / Workflow
DofE Malaysia
Programme Registration Platform
The public website and registration system for a national youth award programme, handling individual and school-cohort enrolment plus an admin dashboard for reviewing registrations and managing site content.
- Next.js
- Prisma
- State machines
- 05Commerce / AI
Halen Miaga
E-Commerce Platform
An online bag retailer with storefront, cart, Stripe checkout, invoicing, and an admin area for stock, suppliers, deliveries and sales reporting.
- Laravel
- Stripe
- LLM assistant
05Credentials
Foundations on paper.
Education
Bachelor of Computer Science (Hons)
First Class Honours
Universiti Selangor2019 — 2022
Certifications
- AWS Certified Cloud PractitionerAmazon Web Services
- AWS re/Start ProgramAmazon Web Services
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