Hi, I'm Sagar Aher

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Senior Backend Engineer specializing in scalable microservices, cloud-native systems, and AI/LLM integration.

About Me

I’m a Senior Backend Engineer with 6+ years of experience architecting and building high-availability enterprise systems. My expertise spans across Telecom, Banking, and Automotive domains.

I specialize in designing event-driven microservices, implementing AI/LLM-powered workflows, and leveraging AWS cloud platforms to solve complex business problems. I am passionate about performance optimization, production reliability, and mentoring teams.

6+ Years Exp.
5+ Personal Projects
3 Domains
AWS Certified

Technical Skills

Backend & Languages

Java 8-21 Python Spring Boot Spring Cloud Hibernate / JPA REST APIs Kafka

AI & Data

Spring AI LLM APIs Vector Stores Embeddings MySQL PostgreSQL MongoDB

Cloud & DevOps

AWS (EC2, S3, SQS) Docker Kubernetes Terraform GitHub Actions Jenkins Datadog

Architecture & Protocols

Microservices Event-Driven SIP / RTP WebSocket OAuth2 System Design

Professional Experience

April 2023 - Present

Senior Backend Engineer

Capgemini | Project: Bandwidth (Telecom)

Designed SIP-based microservices for programmable voice platforms and Kafka-driven event systems. Implemented AI/LLM-powered backend workflows for conversational automation. Migrated legacy infrastructure to AWS, achieving a 40% reduction in cloud costs.

April 2022 - Dec 2022

Software Engineer

Ness Digital | Project: Lentra.ai (Banking)

Developed RESTful APIs for a Loan Management System and webhook-based event APIs. Integrated AWS services (Lambda, API Gateway) for scalable storage and compute. Improved code quality through rigorous testing (JUnit, Mockito) and refactoring.

Jan 2020 - March 2022

Software Engineer

Accenture | Project: Volkswagen (Automotive)

Built Spring Boot backend services and incident-response automation bots using Twilio APIs. Reduced production response time by ~30% through alert-driven workflows. Optimized application performance and database queries.

Education & Achievements

Bachelor of Engineering

Electronics & Telecommunication

Sandip Institute of Technology & Research Centre, Pune University

2019 | CGPA: 7.78

AWS Certified

Solutions Architect – Associate

Amazon Web Services

Certified

Honors & Awards

🏆 SPOT Award (Capgemini) ⭐ WOW Award (Capgemini) 🎖️ Recognition Award (Accenture) ⚓ Captain’s Award (Accenture) 🤖 Automation Expert Award (Accenture)

Get In Touch

I'm currently open to new opportunities and collaborations. Whether you have a question or just want to say hi, I'll try my best to get back to you!