Atul Kundwani

Senior Full Stack Developer with 5+ years of experience designing and delivering scalable web applications using React, TypeScript, Node.js, Express, MongoDB, PostgreSQL, and AWS. Skilled in leading end-to-end feature delivery, mentoring engineering teams, and driving performance improvements across UI and APIs. Automated CI/CD pipelines that saved 8-10 engineering hours per week, with strong experience in REST API design, database optimization, secure integrations, testing, code reviews, and stakeholder collaboration.

Principal Development Engineer at Calsoft (2025-01 – Present)

• Led full-stack delivery, translating requirements into high-quality solutions, improving release stability by reducing rollback incidents and failed deployments.
• Partnered with stakeholders to align technical designs with business needs, driving faster feature adoption by delivering stakeholder-requested enhancements within the same release cycle.
• Applied performance optimization and seamless integrations, reducing API response times and UI load delays through query optimization and efficient integrations and enhancing scalability.
• Drove user-centric engineering and rigorous testing, cutting production issues from frequent weekly occurrences to bi-weekly through stricter testing and reviews.

Software Engineer at Zazz.io (2024-06 – 2024-10)

• Built and delivered scalable client-side features and APIs, improving application responsiveness by optimizing component rendering and API consumption.
• Worked closely with product/design/QA to refine requirements, reducing development cycle time by eliminating rework through early requirement clarification.
• Maintained code quality through reviews and tests, lowering post-release bugs by strengthening code reviews and test coverage.

Software Engineer at Sagarsoft (2023-10 – 2024-04)

• Delivered full-stack and database work for internal applications, improving data consistency by fixing schema issues and enforcing validation at API and database layers.
• Led and mentored a team of 3 developers, handling task allocation, sprint planning, and code reviews, resulting in on-time delivery and increased sprint throughput with 2 additional features delivered per sprint.
• Implemented AWS deployments with Jenkins and Docker, cutting release timelines from days to hours by introducing Jenkins-based CI/CD and Dockerized deployments and improved reliability.
• Established CI/CD automation to saving 8–10 hours per week by automating build, test, and deployment pipelines.

Software Engineer at Tilli Software (2022-12 – 2023-07)

• Integrated payment gateways and built secure APIs for processing, significantly reducing payment failures by improving validation, error handling, and gateway integrations.
• Coordinated with clients to ensure compliance-ready flows, improving checkout completion by fixing edge cases and ensuring compliance-ready payment flows.
• Strengthened validation and logging to enhance reliability, reducing incident resolution time by improving logging, monitoring, and traceability.

Full Stack Developer at Doodle Blue Innovations (2021-06 – 2022-08)

• Delivered full-stack solutions across messaging and telecom domains, improving user engagement through faster UI interactions and smoother messaging flows.
• Coordinated with designers and backend teams to ship features iteratively, reducing release timelines by delivering features incrementally instead of large batch releases.
• Optimized UI components and API consumption, reducing page load time by ~1.5 seconds by optimizing React components and API calls.

Bachelor of Engineering in Information Technology – RGPV Bhopal