Java & C# Backend Engineer · Electronic Trading Systems · FIX Protocol · AI/RAG

I'm a backend engineer with 3+ years of production experience building low-latency trading systems at Nirvana Solutions, working in Java and C#.

Day to day I work on the parts of a trading stack where correctness and concurrency actually matter — FIX Protocol order routing engines, execution report handlers, ATDL-driven order entry, and real-time data pipelines. A lot of my time goes into production debugging: tracing multithreading and concurrency defects in live environments through log analysis and profiling.

Outside of work I build in the same domain. My projects pair FIX/trading systems with Retrieval-Augmented Generation — including a local RAG engine with a FIX log analyzer, and a full FIX 4.4 exchange simulator.

B.Tech (Hons) Computer Science, Poornima College of Engineering — CGPA 9.3/10. Former Google Developer Student Club Lead (600+ members).

Languages

Backend & Frameworks

Trading Technology

AI & GenAI

Databases, Testing & Tools

Domain

Java 21 · Spring Boot 3 · RAG · React 18 · Google Gemini

An AI investigation workspace that combines document intelligence with FIX protocol analysis. Runs entirely locally — no Docker, no Kubernetes, no external vector database.

• FIX Log Analyzer — parses trading logs and detects anomalies including rejects, sequence gaps and duplicate orders, feeding timeline generation and root-cause analysis
• Local RAG engine — document parsing → chunking → offline embeddings → in-database vector storage → semantic retrieval with source citations
• Document ingestion via PDFBox and Apache POI; optional Google Gemini integration
• 12 modules spanning knowledge base, trading investigation, timeline exploration, report generation and dashboards
• React 18 + Vite + Tailwind frontend with Recharts analytics

Java 21 Spring Boot 3 Spring Data JPA H2 / PostgreSQL React 18

Java 17 · Spring Boot 3 · QuickFIX/J · Docker

A self-contained FIX 4.4 trading simulator. Pairs a FIX initiator with an in-process mock exchange acceptor, so complete order lifecycles can be exercised with zero external venue connectivity.

• FIX 4.4 initiator + acceptor with full session management, logon/logout and heartbeats
• NewOrderSingle, OrderCancelRequest and asynchronous ExecutionReport handling (NEW → FILLED)
• Thread-safe in-memory order book with dual indexing on orderId and FIX ClOrdID
• REST API for place / cancel / query, fully documented with Swagger/OpenAPI
• Multi-stage Docker build — one docker-compose up to run, no Java install required
• 37 tests across repository, service, controller and integration layers (JUnit 5, Mockito, MockMvc), run on every push by GitHub Actions

Java 17 Spring Boot 3 QuickFIX/J FIX 4.4 JUnit 5 Maven

Java 21 · Spring Boot 3.5 · MySQL 8 · Spring Security

An event-driven e-commerce platform with separate customer and admin surfaces. Checkout stays responsive by pushing side effects off the request path.

• Placing an order publishes an OrderPlacedEvent consumed independently by three listeners — inventory decrement with low-stock flagging, in-app notification, and audit logging — on a dedicated ThreadPoolTaskExecutor rather than blocking checkout
• Spring Security 6 with JWT (jjwt) and BCrypt password hashing
• Layered architecture — controller → service → repository → entity — with 12 JPA entities, 11 repositories and 8 domain events
• Customer routes for cart and order history; admin routes for inventory, dashboards and audit trails
• JUnit 5 + Mockito + H2 test suite

Java 21 Spring Boot 3.5 Spring Data JPA Hibernate 6 MySQL 8 Spring Security JWT Thymeleaf JUnit 5

Backend Developer · Nirvana Solutions India Pvt Ltd · Jan 2023 – Present

• Delivered production backend trading services in Java and C#, sustaining 99.9% uptime for order and execution workflows under heavy load
• Engineered FIX Protocol order routing engines, execution report handlers and ATDL-driven order entry for venue-specific algorithmic parameters
• Designed RESTful APIs between core backend modules and front-end interfaces, cutting integration latency by 25%
• Diagnosed and resolved complex multithreading and concurrency defects in live trading environments through log analysis and profiling
• Refactored legacy codebases and optimized SQL queries, reducing resource consumption by ~35%
• Built a configuration-driven XML generation engine in C#/.NET Core for automated reporting, cutting execution time 30–40% on large datasets

Software Developer Intern · Dept. of IT & Communication, Govt. of Rajasthan · Jul 2022 – Dec 2022

• Built the iSTART mobile application backend with REST APIs and PostgreSQL, implementing secure server-side authentication and schema design

I'm actively looking for backend engineering roles in fintech, electronic trading and high-performance Java/Spring Boot environments.

• 📧 ridhvikul07@gmail.com
• 💼 LinkedIn
• 📍 Jaipur, Rajasthan, India · Open to remote and relocation