Kuldeep Joshi

Backend-heavy full-stack engineer with a track record of owning entire feature surfaces solo at a fast-moving AI startup — from an autonomous AI voice calling system to a zero-downtime framework migration. Cut backend latency by 20%, drove a 30% engagement lift on a browser extension, and shipped production-grade real-time systems on LiveKit + Kafka. Strong in distributed systems and equally capable on the frontend (Next.js, React, SSR).

Software Development Engineer I at Salesken.ai (2024-06 – Present)

AI Startup

• Designed and shipped an autonomous AI outbound calling system — integrated LiveKit (WebRTC) for real-time voice sessions, Inngest for durable call scheduling and retry orchestration, and Google Sheets as the dynamic contact and script source — enabling the sales team to run sheet-driven call campaigns without manual SDR intervention.
• Sole engineer on a full Spring Boot → FastAPI migration — redesigned all APIs, rewrote the data layer, updated CI/CD, and shipped to production with zero downtime, eliminating a framework dependency the team had been blocked on.
• Reduced production backend latency by 20% by architecting async, event-driven workflows on Apache Kafka — decoupling high-load service calls and improving throughput under peak traffic.
• Diagnosed and resolved chronic PostgreSQL performance bottlenecks by profiling high-traffic queries and designing targeted indexes — eliminating slow-query incidents surfacing in production monitoring.
• Built a Next.js reverse proxy centralizing auth token management and CORS handling across multiple backend services, removing a class of cross-origin errors that previously required per-service workarounds.
• Designed and shipped a React browser extension (Webpack + Auth0) that drove a 30% increase in user engagement — sole owner from architecture through release.
• Implemented Auth0 token-based auth across 4 platforms (Next.js, Electron, React Native, browser extension) with a consistent RBAC model, consolidating identity logic previously scattered per-client.
• Improved frontend page load times by 20% by strategically applying SSR and SSG in Next.js, replacing client-side fetch waterfalls with pre-rendered data.
• Built and maintained multi-environment CI/CD pipelines with GitHub Actions + Docker, enabling automated deployments with environment-specific config isolation — reducing manual deploy steps to zero.

Specialized Program in Data Structures, Algorithms & System Design – Scaler Academy (2022-2024)

B.Tech in Mechanical & Automation Engineering – G.B. Pant Government Engineering College, Delhi (2018-08 – 2022-05)