Headline

Product Engineer II | Ruby on Rails | React | PostgreSQL | Sidekiq | Redis | Scalable APIs | Backend-Focused | System Design

About

Backend-focused Product Engineer with 4+ years of experience building scalable web applications and solving complex engineering problems across CRM, E-commerce, and Healthcare domains. My primary expertise lies in Ruby on Rails, PostgreSQL, Sidekiq, Redis, API development, and performance optimization, with frontend experience in React, Vue.js, JavaScript, HTML, and CSS. Over the years, I’ve worked on end-to-end feature development, background job optimization, third-party integrations, debugging production issues, and improving system reliability for business-critical workflows. I enjoy working on backend architecture challenges, optimizing systems for scale, and building maintainable products that create real business impact. ⚙️ Core Skills: • Ruby on Rails • PostgreSQL • Redis • Sidekiq • React • Vue.js • REST APIs • JavaScript • RSpec • Performance Optimization • System Design 🎯 Currently Exploring: Backend-focused product engineering opportunities with greater ownership, strong engineering culture, and scalable system challenges.

Location

Pune District

AI stack

antigravity

claude code

cursor

gemini

github copilot

mcp

openai

Work experience

Product Engineer - 2 at Sell.Do, Dec 2025 - Present · 8 mos, Pune Division, 1. Developed and enhanced multiple product features across lead management, booking workflows, and CRM automation systems using Ruby on Rails and MongoDB. 2. Diagnosed and resolved complex production issues involving lead assignment workflows, API integrations, and business-critical automation flows. 3. Worked on feature enhancements and bug fixes across high-usage modules to improve platform reliability and user experience. 4. Collaborated with product, QA, and engineering teams to deliver incremental product improvements in fast-paced release cycles. 5. Contributed to debugging backend workflows, optimizing logic, and ensuring smooth client-facing operations.

Senior Software Engineering at Technomatz IT Solutions, Jan 2025 - Sep 2025 · 9 mos, Indore, 1. Built backend services using Ruby on Rails 2. Worked on microservices architecture and API integrations 3. Contributed to infrastructure improvements and system design discussions 4. Delivered client-facing features across backend systems

Software Engineer at Witmates Technologies - A CMMI Level 5 & ISO Certified Company, Jul 2022 - Dec 2024 · 2 yrs 6 mos, On-site, 1. Built and maintained scalable applications across E-commerce and Healthcare domains using Ruby on Rails. 2. Developed REST APIs, third-party integrations, and backend workflows. 3. Optimized PostgreSQL queries and improved application performance. 4. Collaborated with frontend teams on Vue.js integrations. 5. Wrote automated test cases using RSpec.

Junior Software Engineer at Witmates Technologies - A CMMI Level 5 & ISO Certified Company, Jan 2022 - Nov 2022 · 11 mos, Remote, 1. Contributed to backend feature development and bug fixes using Ruby on Rails. 2. Assisted in debugging production issues and maintaining existing applications. 3. Worked in Agile development environments and collaborated with senior engineers.

Education

Bachelor of Technology - BTech, Electronics and communication, Rajiv Gandhi Prodyogiki Vishwavidyalaya

Public links

github: https://github.com/abhishek-jaiswal-selldo