Summary
Overview
Work history
Education
Skills
Certification
Timeline
Generic

Niloy De

Cambridge,United Kingdom

Summary

Technical lead and backend engineer with 14+ years building microservices and distributed systems in Java and Spring Boot. Mentors and guides developers within a Scrum/Agile delivery environment, and led a greenfield platform from initial design through to production. Designs clean REST APIs (Swagger/OpenAPI) and event-driven pipelines with Apache Kafka, backed by solid data modelling in JPA, Hibernate, and relational databases. Provided production support for 10+ applications hosted on AWS, while working closely with multiple stakeholders to translate requirements into reliable, well-architected systems — with a consistent focus on performance and stronger engineering practices.

Overview

15
15
years of professional experience
1
1
Certification

Work history

Technical Lead

Cognizant Technology Solutions
Cambridge, United Kingdom
2025.05 - 2026.06
  • Lead end-to-end delivery of greenfield Java, Spring Boot, and microservices applications, consistently meeting stringent delivery milestones.
  • Design scalable REST APIs, system integrations, and event-driven solutions using Apache Kafka.
  • Improved bulk-upload throughput from 5,000 to 80,000 records per hour (16x increase) using AI-assisted performance optimisation.
  • Designed outbox pattern to solve dual-write problem, ensuring reliable and consistent message delivery between database and Kafka.
  • Designed Kafka processing strategy that enhanced parallel processing and overall throughput.
  • Provide technical guidance through design reviews, code reviews, and mentoring within Scrum/Agile environment.
  • Collaborate with solutions and data architects, stakeholders, and delivery teams on solution design and design discussions.
  • Drive performance, reliability, maintainability, and engineering best practices across team.

Technical Support Lead

Cognizant Technology Solutions
Cambridge, United Kingdom
2019.11 - 2025.04
  • Led technical support engagement for enterprise Java/SpringBoot applications hosted on AWS — taking over from a third-party vendor and growing it from 3–4 applications to 10+, with team scaling to match.
  • Expanded remit to lead the migration of a complex 3-tier, 6-module monolithic application from on-premises infrastructure to AWS cloud.
  • Led greenfield build of a web portal to meet an OCR regulatory requirement — covering requirement gathering, design, and delivery in Spring Boot on AWS — against very tight timelines, on top of the ongoing support engagement.
  • Performed root cause analysis for production incidents and recurring issues.
  • Troubleshot application, API, database, integration, and performance problems.
  • Diagnosed AWS infrastructure issues by analysing CloudWatch Logs, Container Insights, and Performance Insights.
  • Coordinated with development, infrastructure, and business teams to resolve issues.
  • Improved production stability by analysing incident trends and planning and executing corrective fixes, supported by proactive monitoring and service improvements.

Developer/Senior Java Developer

Cognizant Technology Solutions
Kolkata, India
2014.05 - 2019.10
  • Built a greenfield web application from scratch for Cambridge International, used by 10,000+ centres to view millions of candidate results during results release — a business-critical, high-traffic system.
  • Developed major enhancements to business-critical application suite for Cambridge University client, built primarily with Spring Boot and Spring Security with a focus on quality and minimal production issues.
  • Delivered across the full lifecycle — from requirement gathering and customer clarification through to production deployment and early life support.
  • Owned PSV (performance, scalability, and volume) testing end-to-end — defining requirements, building JMeter scripts, analysing reports, applying performance improvements where needed, and publishing results to the client.
  • Supported coding, testing, debugging, and production issue resolution.

Developer

Uniwide Consultancy & Services
Kolkata, India
2012.12 - 2014.04
  • Delivered backend development for a Hospital Management Service product — from requirement gathering through build and enhancement to production release.
  • Developed and maintained Java/Spring Boot-based application components.
  • Contributed to backend development, including SQL queries and feature enhancements.
  • Supported coding, testing, debugging, and production issue resolution.

Software Intern/Developer

MG Tathya Solutions
Kolkata, India
2011.09 - 2012.11
  • Worked as backend developer using Struts 2, before moving to Spring Boot to build multiple small applications.
  • Assisted in coding, debugging, testing, and issue resolution.
  • Supported application enhancements and maintenance activities.

Education

Bachelor of Technology - Information Technology

Maulana Abul Kalam Azad University of Technology
West Bengal, India

Skills

  • Backend: Java, Spring Boot, Spring Framework
  • Architecture: Microservices, Distributed Systems, Event-Driven Architecture
  • API & Integration: REST API Design, API Integration, Swagger/OpenAPI
  • Messaging & Streaming: Apache Kafka, Kafka Producers & Consumers
  • Cloud: AWS Cloud Infrastructure
  • Database & Persistence: JPA, Hibernate, Relational Databases
  • Engineering Practices: System Design, Performance Optimisation, Technical Leadership

Certification

AWS Certified Cloud Practitioner

Timeline

Technical Lead

Cognizant Technology Solutions
2025.05 - 2026.06

Technical Support Lead

Cognizant Technology Solutions
2019.11 - 2025.04

Developer/Senior Java Developer

Cognizant Technology Solutions
2014.05 - 2019.10

Developer

Uniwide Consultancy & Services
2012.12 - 2014.04

Software Intern/Developer

MG Tathya Solutions
2011.09 - 2012.11

Bachelor of Technology - Information Technology

Maulana Abul Kalam Azad University of Technology
Niloy De