Hi, I'm Vaibhav Jain
Senior Software Engineer
Building high-availability SaaS & AI-enabled systems. Scaling platforms to 1M+ users with strong focus on performance and system design.
About Me
A brief introduction about myself and my background
Senior Full Stack Engineer with 4+ years building high-availability SaaS and AI-enabled systems. Strong backend and system design focus with hands-on experience in distributed systems, API design, CDC/data pipelines, and performance optimization. Proven record of improving UX, reducing cloud and LLM costs, and scaling platforms to 1M+ registered users while maintaining high uptime.
Education
Master of Computer Applications (MCA)
Bharati Vidyapeeth's Institute of Computer Applications and Management
Apr 2019 — Jun 2022
Bachelor of Computer Applications (BCA)
Bharati Vidyapeeth's University Institute of Management and Research
Apr 2016 — Apr 2019
Skills & Technologies
Technologies I work with on a daily basis
Languages
Frontend
Backend
Databases
Cloud & DevOps
Other
Work Experience
Where I've worked and what I've accomplished
Careerflow.ai
Senior Software Engineer
- Led architecture and performance work for a cloud-native SaaS platform serving >1M registered users (DAU ~7.5K, MAU ~110K)
- Reduced average page load time ~55% (4.0-4.5s → 1.8-2.0s) and LCP ~56% (3.2s → 1.4s) via API tuning, Redis caching, DB query optimization, lazy loading, and code splitting
- Reduced cloud infrastructure costs ~50% and OpenAI/LLM spend ~40% through autoscaling, resource right-sizing, prompt optimization, batching, and token management
- Designed and implemented CDC pipelines (Firestore → ClickHouse) to power real-time analytics dashboards for B2B stakeholders
- Built LLM-powered features (OpenAI, LangChain) handling 5K+ daily LLM requests (~150K+/month)
- Developed and scaled a Chrome extension integrated with 50+ job boards; improved workflow efficiency ~70%
- Owned observability, alerting, and incident response (Sentry, Amplitude, GA4, Slack); maintained 99.9% uptime
Jollee
Software Development Engineer (Backend)
- Owned backend microservices processing 200K+ API requests/day; achieved p99 latency ≤200ms via caching, denormalization, and parallel processing
- Reduced critical API response times up to 83% using Redis caching and asynchronous job processing
- Integrated 5+ logistics partners and Unicommerce OMS for real-time order tracking
- Implemented Algolia search, cutting query latency ~50% and improving discoverability
- Led cloud migration across AWS and Azure, implemented autoscaling and resilience patterns to reach 99.95% uptime
Gradeprime
Full Stack Intern
- Built RESTful APIs and managed MongoDB to maintain core service availability
- Optimized MongoDB queries and handlers to reduce latency from ~180ms to ~60ms and increase throughput 3x
- Implemented Razorpay payments (99.9% success) and OTP/email authentication
- Increased test coverage from ~30% to ~75%, reducing production bugs ~60%
Get In Touch
Have a project in mind or want to connect? Drop me a message.
Location
Delhi, India
I'm currently open to new opportunities. Whether you have a question or just want to say hi, my inbox is always open!