Vishnu Roshan

Senior Software Engineer

Sedin Technologies — Railsfactory Division, Chennai

Jan 2023 - Present Software Engineer, Oct 2020 - Jan 2023

• Led a 3-engineer frontend/backend team delivering an MVP in the logistics (WMS) space in 4 months; the client returned for two consecutive follow-on phases.
• Trained 16 engineering interns in frontend development; most are still with the company in their third year, contributing in production.
• Management consulting — migrated vector storage from ChromaDB to pgvector after the two-store setup was returning inaccurate search results and adding cost and dev-velocity overhead; consolidated onto the existing database and improved both search quality and performance with hybrid search using Reciprocal Rank Fusion.
• Sedstart — cut cold-boot render time on Sedin's no-code E2E test automation platform from 30–40s to 10–12s (about 70%) through render tree optimization and perceived-performance UX tricks.
• HR technology — cut recruitment timeline by 70% building an applicant tracking and assessment platform for candidates and hiring teams.
• Healthcare — rebuilt the UX of a partially-built compliance tracking platform for a clinical workforce client, driving a 40% increase in initial impressions and leads.
• Retail analytics — contributed low-level design improvements and codebase refactoring to a React Native computer vision app for shelf photography product insights.
• Delivered 10–12 client projects across healthcare, e-commerce, publishing, logistics (WMS), HR technology, management consulting, and retail analytics; most were first-time clients, and most became repeat clients.

Software Engineer

Teknuance Info Solutions, Chennai

Jul 2019 - Jun 2020

• Built REST APIs in Node.js over PostgreSQL and MongoDB for data-heavy applications.
• Developed progressive web apps, including D-Sci, an end-to-end analytics platform.
• Owned and maintained Olimium, a real-time chat application built on WebSockets.
• Applied design patterns and Twelve-Factor App practice to keep services modular and cloud-ready.

Full Stack Developer

Bionworks Technologies (now part of IQVIA), Chennai

May 2018 - Jun 2019

• Built and maintained Healthcommand, a secure family health record application, on Node.js with Angular 6 and Ionic 3.
• Contributed core modules to Healthplug MD, a mobile-first EMR for physicians and care teams, and to PX, a patient engagement platform.

Software Engineer Intern

Aosta Software Solutions, Coimbatore

Dec 2017 - May 2018 Android app for inpatient workflows, in Java and the Android SDK.