Rajat Mittal

Software Engineer

Gurgaon, Haryana, India8 yrs 3 mos experience

Most Likely To SwitchAI ML Practitioner

Key Highlights

Led migration of critical hotelier information system.
Engineered serverless solutions for high-volume dispatch.
Designed secure payment gateway for Axis Bank.

Stackforce AI infers this person is a Backend-focused Software Engineer with extensive experience in Fintech and Travel Technology.

Contact

mittalrajat609@gmail.com LinkedIn

Skills

Core Skills

JavaBack-end DevelopmentAutomationAws

Other Skills

AlgoAlgorithmsAmazon Web Services (AWS)Android DevelopmentApache SolrApplication ProgrammingAttention to DetailCascading Style Sheets (CSS)Code DesignCode ReviewCommunicationCore JavaCrawler AICreative Problem SolvingCustomer Requirements

About

Experienced Software Engineer with over 8 years of expertise in software design, development, and team leadership. Adept in driving cross-functional teams to deliver high-performance applications, with a strong background in Java and back-end technologies. Proven track record of managing complex projects, mentoring junior developers, and optimizing development processes to improve productivity and scalability.

Experience

8 yrs 3 mos

Total Experience

2 yrs

Average Tenure

4 yrs 7 mos

Current Experience

Makemytrip

2 roles

Lead Software Engineer

Promoted

Feb 2024 – Present · 2 yrs 4 mos · Gurugram, Haryana, India · On-site

Led the end-to-end migration and redesign of the hotelier information system, a critical platform handling over 100,000 booking requests/day, ensuring high throughput with minimal downtime. Designed a scalable, event-driven architecture using Java, Spring Boot, Kafka, and MySQL, with robust retry mechanisms and high fault tolerance.
Developed a headless automation system to pay visa application fees via virtual credit cards using Selenium, Crawler AI, GPT-4, and a custom VCC engine

JavaSpring BootKafkaMySQLBack-End Development

Senior Software Engineer 2

Oct 2021 – Jan 2024 · 2 yrs 3 mos · Gurugram, Haryana, India · On-site

Engineered a serverless mailing solution using multithreaded AWS-based Lambda and SES to dispatch TDS forms to 40,000+ vendors/month.
Built a distributed tax computation service using Java, Spring Boot, and REST APIs, incorporating
multi-slab tax logic for holiday bookings with sub-5ms response times.
Consolidated underutilised backend services to a shared server, reducing infrastructure cost by $800/month

JavaSpring BootAWSREST APIsBack-End Development

Freecharge

Lead Software Development Engineer

May 2020 – Sep 2021 · 1 yr 4 mos · Gurugram, Haryana, India · Remote

Designed and developed the Axis Bank payment gateway from scratch, integrating UPI, credit card, and
debit card payments.
Built secure transaction layers with JWT authentication, signature verification, and Redis-based deduplication to guard against fraud.
Developed real-time merchant dashboard and notification service using Spring MVC and webhooks,
enabling live tracking and reconciliation.
Technologies used Java 11, Spring Boot 2.4, MVC, AWS, MySQL, Redis, Kafka, Rest APIs.

JavaSpring BootRedisJWTBack-End Development

Expedia group

SDE

Apr 2019 – Apr 2020 · 1 yr · Gurgaon, Haryana, India · On-site

Refactored flight booking service using Java, Spring Boot, and REST APIs, simplifying onboarding for new flows.
Tuned garbage collection (GC) parameters, thread pools, and JVM settings to improve memory utilization and reduce response time variability during high traffic.
Technologies used Java 8, JUnits, SOAP APIs, AWS.

JavaSpring BootREST APIsBack-End Development

Indiamart intermesh limited

Analyst Programmer

Dec 2017 – Apr 2019 · 1 yr 4 mos · Noida Area, India · On-site

Developed the search microservice using Apache Solr to retrieve relevant products from millions of listings.
Reduced API response time by 50% through query profiling, Redis-based caching, and optimized indexing
Technologies used Java 8, Apache Solr, Git, Linux, Shell Scripting, AWS

JavaApache SolrRedisBack-End Development

Remaxys infotech pvt. ltd.

Software Engineer

Dec 2016 – Dec 2017 · 1 yr · Noida Area, India · On-site

Built a real-time infrastructure monitoring system using Java, MongoDB, and REST APIs to ingest
and visualize server telemetry (CPU, memory, disk).
Technologies used Java 7, Multithreading, Concurrency, Shell scripting, JAXB, JMS, OSGI, Maven, Tortoise.

JavaMongoDBREST APIs