meiyaz / java dev

Engineering portfolio for Java, systems, and product delivery.

I am Meiyazhagan Kulandaivel. I am primarily a Java developer who enjoys building solid backend systems.

I work most with Java + Spring Boot for APIs and integrations, and I pair that with practical frontend work in React when product delivery needs end-to-end ownership.

Experience across enterprise banking products, integration-heavy backend systems, and end-to-end delivery ownership.

Explore ProjectsContact Me

5+

Years building products

5

Projects shipped

4

Tech used in builds

build-log.sh

$ whoami
Meiyazhagan Kulandaivel

$ current_focus
Senior Developer @ Avenza Consulting

$ stack --core
Java, Spring Boot, MySQL, Docker, AWS

$ stack --ui
React, JavaScript, HTML5, CSS3, Node.js

Signal

  • Spring Boot and REST/SOAP integrations
  • Full-stack delivery across Java and React
  • Mentoring mindset from GUVI to enterprise teams

Credentials

6

Active certifications in cloud, CI/CD, and platform engineering.

Profile Lens

Java Backend

Backend-first engineer focused on reliable APIs and integrations.

  • Spring Boot microservices
  • API reliability and performance
  • Banking integrations

Java First

Backend, APIs, and integration-heavy systems are where I do my best work.

Core backend stack

JavaSpring BootMySQLDockerAWS

Also comfortable in UI delivery

ReactJavaScriptHTML5CSS3Node.js

All Skills

JavaSpring BootNode.jsReactJavaScriptHTML5CSS3MongoDBMySQLDockerGitAWS

Now / Next

Current execution lane and next 30-day push.

Now

  • Building and extending digital banking modules with API-driven integrations.
  • Improving delivery speed with clearer service boundaries and reusable integration contracts.

Next 30 Days

  • Deepen cloud-native deployment patterns for Spring services.
  • Publish one technical write-up focused on Java integration design.

Experience

Career path across product engineering and digital banking delivery.

Senior Developer

Avenza Consulting

Oct 2025 - Present

Part of the Digital Banking (Infinity) development team, building and enhancing solutions using Quantum Fabric and Quantum Visualizer. Designing and managing integrations with third-party systems through REST and SOAP APIs and middleware, while contributing as a hands-on developer across backend and frontend delivery.

Product Engineer

Temenos

Jan 2023 - Oct 2025

Engineered secure, scalable RESTful APIs for core banking functions using Spring Microservices and Quantum Fabric. Developed and optimized responsive, cross-device hybrid front-end interfaces. Ensured platform robustness through extensive debugging and issue resolution to meet high-quality banking standards.

Software Engineer

Temenos

Sep 2021 - Dec 2022

Developed secure, scalable RESTful APIs using Spring Microservices for the Infinity Digital Banking platform. Built and optimized responsive front-end interfaces using Quantum Visualizer. Maintained platform reliability and quality through rigorous debugging and proactive issue resolution.

Software Developer, Technical Mentor

GUVI Geek Networks, IITM Research Park

Feb 2021 - Aug 2021

Delivered comprehensive MERN stack training, leading lectures, hands-on projects, and code reviews. Created and evaluated assessments using Guvi's internal tools. Developed a web application to streamline the tracking and analysis of trainee performance data.

Things I Built

Selected projects that show how I build and ship.

Build 01

IIC-Website

Website for the Institution's Innovation Council (IIC) of my university.

HTMLCSSJavaScript
LiveCode

Build 02

Emergency-Patient-Monitoring-System

A web application to monitor patients in real-time, designed for MHRD's Coronathon.

HTMLCSSJavaScriptPHP
Code

Build 03

Covid-EPMS

A web application for tracking and managing COVID-19 patients.

HTMLCSSJavaScriptPHP
Code

Build 04

Certificate-Maker

A web application to generate certificates in bulk.

HTMLCSSJavaScript
LiveCode

Lab Feed

Live GitHub output and HackerRank problem-solving track.

GitHub Live

Open Profile

53

Repos

2

Total Stars

JavaScript

Top Language
JavaScript 17HTML 17Other 5PHP 4Java 3

NetBanking-Java

Stars 1

Java Applet

JavaUpdated 2/24/2026

Sales-Prediction-Using-Multiple-Regression

Stars 1

No description provided.

Jupyter NotebookUpdated 5/5/2021

SaaS-Inventory

Stars 0

No description provided.

JavaScriptUpdated 3/5/2026

meiyaz

Stars 0

No description provided.

Multi stackUpdated 2/24/2026

DailyXpense

Stars 0

No description provided.

TypeScriptUpdated 1/4/2026

ChennaiNow

Stars 0

No description provided.

JavaScriptUpdated 10/10/2025

Social Feed

Medium writing and LinkedIn updates.

Impact Metrics

Outcome-oriented snapshot.

5+

Years in production engineering

3

Banking-grade roles delivered

5+

Public projects shipped

GUVI + teams

Mentorship experience

Architecture Snapshots

Representative architecture thinking from real delivery contexts.

API Gateway to Service Mesh Pattern

Request path from channel layer through secure gateway and service orchestration.

GatewaySpring ServicesResilience

Third-Party Integration Flow

REST/SOAP orchestration with middleware adapters, retries, and traceable error handling.

IntegrationMiddlewareObservability

Hybrid UI + Backend Contract Model

Frontend module boundaries mapped tightly to backend APIs for faster release cadence.

FrontendContract-firstDelivery

Case Study

Digital Banking Integration Modernization

Senior Developer

Worked on digital banking modules requiring stable integration with multiple third-party and middleware systems.

Constraints

  • Mixed protocol landscape (REST + SOAP)
  • High reliability and quality expectations
  • Need for rapid feature delivery without regression

Decisions

  • Standardized integration contracts and shared adapter patterns.
  • Strengthened error handling and observability across critical flows.
  • Balanced backend robustness with practical frontend delivery support.

Outcome

  • Improved consistency in integration behavior across modules.
  • Reduced debugging friction through clearer traceability.
  • Enabled faster implementation for new workflow enhancements.

Writing / Talks

Knowledge sharing in writing and sessions.

How I Work

Engineering habits that keep delivery fast and maintainable.

Build for reliability

Clear APIs, predictable behavior, and clean service boundaries over clever shortcuts.

Keep learning in public

I have mentored at GUVI and I still enjoy breaking down concepts for other developers.

Ship practical software

I focus on what moves the product forward, not just what looks good in architecture slides.

Certifications

Recent learning aligned to backend + cloud delivery.

Automate ReactJs & SpringBoot CICD Pipelines on Azure DevOps

Udemy | September 2025

View credential

Blockchain Certification Training

Simplilearn | September 2023

View credential

Education

K.S.Rangasamy College of Technology

Bachelor of Engineering, Computer Science and Engineering

2017 - 2021

Grade: 9.15

Let us build something useful.

Email or DM works best.

LinkedInEmail Me