Rahul Saha
Summary
Experienced Java Spring boot developer with AWS cloud full stack. Experienced with many REST application development with strong debug skill. Love to learn from and listen to others. Serious about each and every deliverable. Challenge taker and adaptive to any changes. Good decision maker after an in-depth logical analysis. Believe in hard work more than luck.
Overview
7
7
years of professional experience
Work History
Application Developer
IBM
10.2023 - Current
- Engineered a cloud-native information and REST service platform serving multiple upstream and downstream enterprise applications.
- Delivered major API enhancements for high-complexity, high-traffic systems, improving reliability, scalability, and performance.
- Worked extensively across the AWS ecosystem — Lambda, CloudWatch, ECS, ElastiCache, CloudFormation, RDS — to build resilient, observable, and cost-efficient services.
- Led end-to-end troubleshooting across integrated applications, resolving production issues impacting real-time data flows and business operations.
- Actively participated in critical outage bridges with clients and DevOps teams, accelerating root-cause identification and recovery time.
- Executed multiple deployments independently, ensuring zero-defect releases and seamless environment promotion.
- Provided technical leadership and mentoring to junior developers, improving team capability and delivery quality.
Senior Software Engineer
IBM
09.2022 - 10.2023
- Developed scalable REST APIs to deliver near real-time meter readings, outage alerts, and consumption insights to customer-facing and operations applications.
- Built Kafka consumers to process IoT-based transformer-health events, enabling better outage prediction and grid-health monitoring.
- Utilized AWS Lambda, CloudWatch, API Gateway to enhance event ingestion, monitoring, and fault-tolerant processing across millions of meter data points.
- Collaborated in architecture discussions to improve data latency, throughput, and system resilience, ensuring consistent performance under large-scale AMI data loads.
Senior Software Engineer
IBM
11.2021 - 08.2022
- Worked as backend developer building REST API.
- Worked in enhancements and scratch development both.
- Spring boot Developer.
- Used hibernate/JPA.
- Worked with oracle and Postgres database both.
- Used azure pipeline also.
- Worked on many API development for separate module in the application.
- Fixed many defects/issues.
- Web application development project for a telecommunication business(sales application)
Programmer Analyst
Cognizant Technology Solutions
12.2019 - 11.2021
- Developed and optimized custom services for insurance agent modules, enhancing functionality, stability, and performance.
- Conducted in-depth code analysis, debugging, and feature-level optimization to ensure high-quality, accurate solutions.
- Managed code repositories, coordinated deployments, and executed DML operations, ensuring seamless releases and minimal conflicts.
- Supported data workflows and backend processing using JDBC and MySQL, enabling reliable data validation and manipulation.
- Collaborated effectively with teammates and clients during batch executions, demos, and deployment cycles to ensure smooth project delivery.
Programmer Analyst Trainee
Cognizant Technology Solutions Pvt. Ltd.
09.2018 - 11.2021
- Worked on some entity class making independently after gathering requirements and build some custom query method too.
- Worked on many code changes for the services like addBusiness, addProducerSupport, getAllSubFirms, searchProducer etc.
- Worked on MVC annotation validations.
- REST services development project for a producer portal
Education
Bachelor of Technology - Information Technology
B.P. Poddar Institute of Management and Technology
06.2018
Higher Secondary Examination - Science
Kanailal Vidyamandir (Eng Sec.)
01.2013
Secondary Examination - Regular
Kanailal Vidyamandir (Eng Sec.)
01.2011
Skills
- JAVA
- Spring Boot
- AWS
- REST API
- JPA
- SQL
- CI/CD
- GitHub Actions
- Git
- Docker
- Agile
- ECS
- LAMBDA
- CloudFormation
Accomplishments
AWS cloud Practitioner Certification
Microsoft certification on Azure AI.
LOMA 281 Certification.
"PAT on the back" award by Cognizant & "Exceeding Everest" award by client HR council.
Client appreciation for many times for several reasons.
Microsoft certification on Azure AI.
LOMA 281 Certification.
"PAT on the back" award by Cognizant & "Exceeding Everest" award by client HR council.
Client appreciation for many times for several reasons.
Languages
- Bengali
- Hindi
- English, Full Professional Proficiency
- Bengali, Full Professional Proficiency
- Hindi, Professional Working Proficiency
Working History
Cloud-Enabled Information System & REST Application:
Worked on a cloud-enabled information system and REST application serving multiple upstream and downstream consumers. Performed complex API enhancements and closely worked with AWS components like Lambda, CloudWatch, ECS, ElastiCache, CloudFormation, and RDS. Handled troubleshooting across multiple applications, participated in client and DevOps outage calls, managed deployments independently, and mentored junior teammates.
Smart Meter Reading Project:
Developed microservices to process and validate smart meter readings for energy utilities. Implemented Kafka-based event streaming, Resilience4j retry and fallback mechanisms, and robust backend processing to support downstream analytics and reporting workflows.
Telecommunication Web Application (CSSWEB):
Backend developer for a sales web application, building REST APIs using Spring Boot and Hibernate/JPA. Contributed to both scratch development and feature enhancements. Worked with Oracle and PostgreSQL databases, Azure pipelines, and developed multiple APIs across application modules while fixing defects and performance issues.
Insurance Business Data Management Application:
Enhanced custom services for the insurance agent module, performing feature-based code analysis, fixing issues, and ensuring code repository integrity to prevent conflicts. Supported downstream data stabilization and business data manipulation workflows. Worked extensively with JDBC and MySQL for backend processing and validation.
Producer Portal REST Services:
Developed entity classes and custom query methods independently after requirement gathering. Implemented REST services including addBusiness, addProducerSupport, getAllSubFirms, and searchProducer. Applied MVC annotation validations and performed extensive service-level code changes.
Timeline
Application Developer
IBM
10.2023 - Current
Senior Software Engineer
IBM
09.2022 - 10.2023
Senior Software Engineer
IBM
11.2021 - 08.2022
Programmer Analyst
Cognizant Technology Solutions
12.2019 - 11.2021
Programmer Analyst Trainee
Cognizant Technology Solutions Pvt. Ltd.
09.2018 - 11.2021
Bachelor of Technology - Information Technology
B.P. Poddar Institute of Management and Technology
Higher Secondary Examination - Science
Kanailal Vidyamandir (Eng Sec.)
Secondary Examination - Regular
Kanailal Vidyamandir (Eng Sec.)