Swapnil Shah
Architecting high-throughput microservices and institutional-grade Trading APIs at JM Financial — powering execution and routing for 500K+ daily active users on the BlinkX platform.
About Me
I'm a Backend Developer with 1.5+ years at JM Financial building the BlinkX trading platform — a high-throughput enterprise system serving over 500K daily users.
My core focus has been architecting robust, low-latency infrastructure. Key wins include engineering the enterprise Trading API Suite, cutting critical API latency from 800ms → 60ms, and reducing payload sizes by 80% to ensure seamless market operations.
Outside of work, I design automated trading systems using my own Trading API infrastructure and manage a production-grade self-hosted homelab utilizing Cloudflare Zero Trust and Docker.
Core Competencies
Skills & Technologies
A battle-tested stack spanning backend services, distributed systems, cloud infrastructure, and full-stack development.
Architecture Philosophy
Core concepts I design and build with daily
Professional Experience
Software Developer
Architected and developed a robust, high-throughput RESTful Trading API suite serving institutional and retail clients. Implemented advanced order routing, real-time market data streaming, and secure OAuth2 authentication.
Optimized critical app-init API from 800ms (spiking >2s) to 60–70ms under high traffic — directly improving startup reliability for 500K+ daily active users.
Reduced API response times of multiple reports endpoints by 85% (2s → 300ms) through query optimization, Redis caching, and HikariCP connection pool tuning.
Engineered byte-format data transmission cutting API payloads by up to 80%, boosting network throughput across mobile and web clients.
Implemented per-endpoint, per-API-key rate limiting using Redis + Bucket4j with sliding window counters and Lua scripting for atomic operations.
Architected the Trading API Developer Portal authentication: OAuth-style flow with api_key, api_secret, request_token, access_token, and SHA-256 checksum verification.
Built and maintained 15+ Spring Boot microservices with Grafana monitoring, Docker containerization, and automated deployments on Google Cloud Platform.
Tech Stack
Open to New Opportunities
Interested in backend-heavy, high-scale roles. Remote-friendly.
Featured Projects
Showcasing scalable architectures, institutional-grade API integrations, and robust infrastructure systems.
BlinkX Trading APIs
Fintech · Enterprise API · System ArchitectureEnterprise-grade Trading API suite developed for JM Financial. Designed for high-frequency trading, low-latency execution, and seamless integration for third-party developers.
- Engineered a low-latency execution engine processing orders in under 5ms.
- Built a secure OAuth2 developer portal for API key generation and session management.
- Implemented sliding-window rate limiting using Redis and Bucket4j to ensure system stability.
- Designed real-time market data streaming integration handling high throughput during market hours.
Traders Diary
Trading · Python · AnalyticsAutomated trading journal that integrates Trading APIs to auto-sync closed positions, compute analytics, and deliver real-time Telegram alerts.
- Auto-syncs closed positions at 3:30 PM IST daily — records entry/exit prices, realized P&L, and trade metadata in SQLite (WAL mode).
- Regex-based Indian options symbol parser detecting Iron Condors, Spreads, Straddles automatically.
- Per-underlying analytics with equity curves, doughnut charts, win rate, avg P&L, and W/L ratio.
- Telegram Bot (webhook) with /note and /rate commands for remote journaling via Cloudflare Tunnel.
Self-Hosted Infrastructure
DevOps · Infrastructure · LinuxProduction-grade homelab on a personal Linux server behind CGNAT — publicly accessible via Cloudflare Tunnel with full observability and Zero Trust security.
- CGNAT bypass using Cloudflare Tunnel (QUIC) with free SSL/DDoS protection.
- Nginx reverse proxy with wildcard subdomain routing serving 8+ apps from one machine.
- Full observability: Grafana + Prometheus + Node Exporter + Loki + Promtail for metrics & logs.
- Cloudflare Zero Trust with email OTP gate; all services automated with systemd and shell scripts.
Education & Certifications
B.E. in Computer Engineering
Dwarkadas J. Sanghvi College of Engineering
Mumbai University · 2020 – 2024
Achievements & Certifications
Meta Front-End Developer Professional Certificate
Coursera · Meta
HTML, CSS, Bootstrap, React, responsive design principles
Architecture Documentation — Trading API Developer Portal
JM Financial
Comprehensive PDF + PPTX architecture documentation presented to stakeholders
Academic Distinction — CGPA 9.375
D.J. Sanghvi, Mumbai University
Maintained Distinction grade throughout 4-year Computer Engineering program
Let's Build Something Amazing
I'm currently open to new backend engineering roles, interesting projects, and collaborations. Don't hesitate to reach out — I reply fast.
Mumbai, India · Usually replies within 24 hours