not a resume. this is my build space.

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 builds say hello

Years building products

Projects shipped

Tech used in builds

Meiyazhagan Kulandaivel

Senior Developer

Chennai, India

kmeiyazhagan14@gmail.com LinkedIn GitHub

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

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

Live Code

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

Live Code

Lab Feed

Live GitHub output and HackerRank problem-solving track.

GitHub Live

Open Profile

Repos

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

HackerRank Workstream

Open Profile

Problem solving in data structures, algorithms, and backend-oriented coding tasks.

Problem SolvingJavaSQL

AlgorithmsData StructuresSQL

Java Problem Solving Track

DSA

Consistent practice on arrays, strings, hash maps, and dynamic programming.

SQL Challenge Set

SQL

Query optimization, joins, window functions, and analytics-style problems.

30-Day Coding Sprint

Practice

Daily coding rhythm with increasing difficulty and clean implementation focus.

Impact Metrics

Outcome-oriented snapshot.

Years in production engineering

Banking-grade roles delivered

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.

Writing

Core Java Fundamentals

Guide

Concept-focused Java fundamentals with practical examples.

Mastering Java Collections: A Comprehensive Guide

Medium Blog | Oct 5, 2023

Practical walkthrough of Java collection types and when to use each in real-world development.

Setting Up and Running a C++ TCP Server on Windows

Medium Blog | Jun 17, 2024

Step-by-step setup for building and running a basic TCP server in C++ on Windows using port 8080.

Talks

MERN + Java Mentoring Sessions

GUVI Geek Networks

Delivered practical, project-led training and code review 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

Data Science with Python

Udemy | June 2025

View credential

AWS Technical Essentials

Simplilearn | September 2023

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.

LinkedIn Email Me

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

Java Backend

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

Core backend stack

Also comfortable in UI delivery

Current execution lane and next 30-day push.

Now

Next 30 Days

Career path across product engineering and digital banking delivery.

Senior Developer

Product Engineer

Software Engineer

Software Developer, Technical Mentor

Selected projects that show how I build and ship.

IIC-Website

Emergency-Patient-Monitoring-System

Covid-EPMS

Certificate-Maker

Live GitHub output and HackerRank problem-solving track.

GitHub Live

NetBanking-Java

Sales-Prediction-Using-Multiple-Regression

SaaS-Inventory

meiyaz

DailyXpense

ChennaiNow

HackerRank Workstream

Java Problem Solving Track

SQL Challenge Set

30-Day Coding Sprint

Medium writing and LinkedIn updates.

Medium

LinkedIn

Outcome-oriented snapshot.

Representative architecture thinking from real delivery contexts.

API Gateway to Service Mesh Pattern

Third-Party Integration Flow

Hybrid UI + Backend Contract Model

Digital Banking Integration Modernization

Constraints

Decisions

Outcome

Knowledge sharing in writing and sessions.

Writing

Talks

Engineering habits that keep delivery fast and maintainable.

Build for reliability

Keep learning in public

Ship practical software

Recent learning aligned to backend + cloud delivery.

Automate ReactJs & SpringBoot CICD Pipelines on Azure DevOps

Data Science with Python

AWS Technical Essentials

Blockchain Certification Training

K.S.Rangasamy College of Technology

Email or DM works best.