SAGAR AHER

Senior Software Engineer – Full Stack (Java, React, AWS, Microservices)

6+
Years Experience
3
Companies
10+
Tech Skills
5+
Awards

Professional Summary

Senior Java Full Stack Developer with 6+ years of experience designing, developing, and deploying scalable full-stack applications using Java (8–21), Spring Boot, React.js, and TypeScript. Strong expertise in microservices, event-driven architectures, REST APIs, and cloud-native deployments. Proven track record of delivering enterprise-grade solutions across telecom, banking, and automotive domains, with a strong focus on performance, UI–backend integration, clean architecture, and production stability.

Core Technical Skills

πŸ’» Programming Languages

Java, Python

🎨 Frontend Development

React.js, TypeScript, HTML5, CSS3

πŸ”§ Frameworks & Libraries

Spring Boot, Spring Cloud, Hibernate, JPA, OAuth2

πŸ—οΈ Architecture & Patterns

Microservices, Event-Driven Architecture, REST APIs

☁️ Cloud & DevOps

AWS, Docker, Kubernetes, Jenkins, Terraform, Git, GitHub Actions

πŸ“¨ Messaging & Streaming

Kafka, SQS

πŸ’Ύ Databases

MySQL, PostgreSQL, MongoDB

🌐 Protocols & Communication

HTTPS, WebSocket, SIP, SDP, RTP

πŸ“Š Monitoring & Tools

Datadog, Grafana, Postman, IntelliJ IDEA

πŸ€– AI & LLM Integration

Spring AI, LLM APIs, embeddings, vector stores, tool/function calling

Professional Experience

Capgemini

Senior Software Engineer

April 2023 – Present

Project: Bandwidth (Telecommunication Domain)

  • Designed and developed Java/Spring Boot microservices supporting SIP-based orchestration for enterprise-grade programmable voice solutions.
  • Built REST APIs and event-driven services using Apache Kafka, ensuring high availability, fault tolerance, and scalability.
  • Implemented real-time voice and streaming features, including speech recognition, audio transcription, live audio streaming.
  • Integrated AI-driven workflows using LLM APIs, enabling intelligent call routing and conversational automation.
  • Implemented CI/CD pipelines using GitHub Actions, automating build, test, and deployment processes.
  • Led cloud infra modernization by migrating from OpenShift to AWS, improving scalability and reducing cloud costs by 40%.
  • Developed and optimized Docker images for microservices and deployed them through automated CI/CD pipelines.
  • Actively resolved production issues, improved system reliability, and supported stable enterprise releases.

Ness Digital Engineering

Software Engineer

April 2022 – December 2022

Project: Lentra.ai (Banking domain)

  • Developed and deployed RESTful APIs for a Loan Management System using Spring Boot, Java 8, and JPA.
  • Designed event-driven webhook APIs to notify external systems of real-time loan status changes, improving partner integrations.
  • Implemented unit testing using JUnit and Mockito, improving test coverage and reducing regression defects.
  • Integrated microservices with AWS services (EC2, S3, API Gateway, Lambda) and MongoDB, ensuring high availability and performance.
  • Improved code quality and maintainability through refactoring, SonarLint analysis, and peer code reviews.

Accenture

Software Engineer

January 2020 – March 2022

Project: Volkswagen (Automobile domain)

  • Developed backend services using Spring Boot to implement business logic and REST APIs.
  • Key contributor to the Automation Team, building an incident-response bot using Spring Boot and Twilio APIs, reducing response time by 30%.
  • Integrated React and TypeScript frontends with backend services, ensuring seamless data flow and real-time UI updates.
  • Improved application performance through caching strategies and optimization techniques.
  • Ensured compliance with SOLID principles, architectural standards, and enterprise delivery best practices.

Education

πŸŽ“ Bachelor of Engineering

Electronics & Telecommunication

Sandip Institute of Technology & Research Center

SPPU, Nashik | 2019

CGPA: 7.78

πŸ“š HSC (12th)

Maharashtra State Board

2015

Score: 64%

πŸ“– SSC (10th)

Maharashtra State Board

2013

Score: 80%

Certifications

☁️ AWS Certified Solutions Architect – Associate

Awards & Recognition

πŸ† SPOT Award – Capgemini
🌟 WOW Award – Capgemini
πŸŽ–οΈ Recognition Award – Accenture
πŸ‘¨β€βœˆοΈ Captain's Award – Accenture
πŸ€– Automation Expert Award – Accenture