Full Stack Developer with Payments & Cloud Expertise

Abhinav Kumar Jha

**********.***@*****.*** +91-620*******

GitHub § LinkedIn

Work Experience

• Adit Microsys Pvt Ltd Dec 2024 – Present

Full Stack Developer Ahmedabad, Gujarat

– Integrated BBPS payment gateway for web, mobile APIs, and bank integrations including bill fetch, verification, receipt gener- ation, and secure transaction logging.

– Integrated Gupshup WhatsApp, SMS gateway, and email services for customer communication workflows.

– Integrated Aadhaar-based customer verification and POS machine payment processing.

– Optimized SQL Server stored procedures using temp tables, CTEs, indexing, partitioning, and efficient data types with normalization/ normalization based on read/write patterns.

– Optimized complex report queries for Excel exports and Report Builder with advanced search and transaction logging.

– Implemented modular Angular architecture leveraging interceptors, pipes, directives, services, and form validations to reduce page latency.

– Deployed and configured applications on IIS and Linux servers.

– Configured SQL Server Agent jobs for automated database backups and critical task scheduling; managed transactional logs.

– Managed file storage using FTP and AWS S3 for images and documents.

– Built bulk Excel upload pipelines with validations; designed and implemented multiple modules across UI, backend, and database layers.

• SOFTWARE GIANT Nov 2022 – Dec 2024

Full Stack Developer

– Implemented security features including OTP-based 2FA, RBAC, JWT authentication, session management, activity tracking, and social logins.

– Built email services with dynamic templates and notification systems using in-app alerts and Firebase Cloud Messaging.

– Developed real-time chat systems using SignalR supporting one-to-one and group messaging with file sharing.

– Integrated multiple payment gateways including Stripe, Zeropay, and Perfect Money.

– Implemented background and scheduled processing using Hangfire and Quartz WebJobs.

– Developed WebView2-based tracking to capture employee activity (mouse/keyboard events) at periodic intervals.

– Created and optimized SQL Server stored procedures, views, triggers, and functions.

– Implemented dynamic SQL for flexible querying, pagination, and conditional filters.

– Used cursors, CTEs, temporary tables, triggers, and functions based on performance and use-case requirements. Personal Projects

• Distributed Backend System § 11/2022-Present

Microservices, Messaging, Caching, Search, Containerization

– Designed and developed a microservices-based backend system consisting of Product, Payment, and Notification services.

– Implemented Kafka-based asynchronous communication between services to ensure loose coupling and scalability.

– Integrated Redis caching for frequently accessed data, implementing cache eviction strategies to maintain data consistency.

– Added Elasticsearch-based full-text search to replace SQL LIKE queries, significantly improving search performance.

– Containerized services using Docker and deployed them using Kubernetes for service orchestration and clustering.

• GenAI Integrations and Applications § 07/2024 – Present LLM Integration, RAG Pipelines, Vector Databases

– Developed multiple Generative AI applications integrating LLMs such as Claude, OpenAI, Gemini, and DeepSeek.

– Designed and implemented Retrieval-Augmented Generation (RAG) pipelines using LangChain and Chroma vector database for context-aware responses.

– Built a semantic movie recommendation system using SentenceTransformer (all-MiniLM-L6-v2), cosine similarity, and vector search over Hugging Face datasets.

– Implemented a web crawler-based ingestion pipeline to extract job postings from company career portals, generate embed- dings, and enable semantic job search based on role, tech stack, and experience. Technical Skills and Interests

Programming Languages: C++, Java, C#, JavaScript, TypeScript Backend & Frameworks: DotNet Core, Web API, MVC, Angular,Kafka, Redis, Elasticsearch Databases: SQL Server, PostgreSQL, MySQL, Chroma, Pinecone DevOps & Cloud: Docker, Kubernetes, Git, GitHub Actions, Jenkins, AWS (S3),Postman Software Design: OOP, SOLID Principles, Design Patterns, Low-Level Design, Basic High-Level Design CS Fundamentals: Data Structures and Algorithms, Operating Systems, Computer Networks, DBMS Education

• University Institute Of Technology, Burdwan University Year: 2019-23 Computer Science and Engineering CGPA: 8.2

Achievements

• Solved 1000+ DSA problems across multiple platforms: codolio.com/profile/Abhinav_Jha1947

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