Devashish Yadav · SDE-3 @ Leena AI
about
Software Engineer with a passion for transforming complex challenges into simple, elegant, scalable solutions.
snapshot
01SDE-3 · Leena AI02SDE-2 · Pocketpills03B.Tech · DTU0418+ technologies in the stack
05based in Gurugram, India
experience
where I've
worked
Leena AI
Software Development Engineer 3
08/2025 — PresentGurugram, India
- Architected AI Colleagues, a multi-threaded, event-driven Agentic AI chat platform handling ~120K DAU using WebSockets, Server-Sent Events, and async I/O; handled LLM orchestration, tool calling, reasoning pipelines, backpressure handling and robust concurrency — improving responsiveness by 80% and scaling to 10x concurrent sessions.
- Migrated the mobile delivery platform to React Native 0.84 + Expo, implementing EAS Build/Update OTA pipelines, automated CI/CD workflows, and release orchestration — improving deployment reliability by 60%, reducing operational overhead by 70%, and cutting production hotfix rollout from days to under 30 minutes.
- Built cross-platform real-time Voice AI system integrating Retell SDK with WebSockets, bridging mobile-native layers (iOS CallKit, Android ConnectionService) — reducing latency by 40% and increasing user engagement by 25%.
- Owned the Security roadmap for the frontend, leading the remediation of all critical vulnerabilities from a third-party audit and implementing robust systems to harden the application against XSS attacks.
React NativeTypeScriptWebSocketsExpo
Pocketpills
Software Development Engineer 2
08/2021 — 08/2025Gurugram, India
- Re-architected Pocketpills SSR Monolith into a Microfrontend monorepo (Turborepo + Next.js), introducing hybrid SSR/SSG/CSR rendering and driving SSR → CSR migration for non-critical paths — cutting infrastructure costs by 60%, improving cacheability, scalability and enabling independent deployments via isolated CI/CD.
- Built a JWT-based auth service with access/refresh tokens via HTTP-only cookies, designed token rotation, secure storage, and guest-to-user session flows — improving auth-layer security by 60% and reducing unintended logouts by 80%.
- Enhanced page performance and optimized SEO: improved GTMetrix score from grade D to A, resulting in a 40% boost in search ranking, faster load times, promoted Web Vitals, and an overall better user experience.
- Integrated self-serve features like Moneris payment gateway, Intercom AI Chatbot, Google/Apple SSO, and self-hosted Strapi CMS for Help Center/Blogs — reducing average handling time for the support team by 25%.
- Revamped the mobile React Native App WebView controller with robust error handling, reducing crash rates by 30%, and integrated Apple Pay and Google Pay using the Moneris SDK — boosting payment success rates by 25%.
- Analyzed logs with AWS CloudWatch/Kibana insights queries, identifying and resolving 95% of root cause issues.
- Independently led management for an enterprise B2B tool, improving data accuracy by 30%.
- Gained experience in Acquisition, B2B, SEO, Tech Operations, and Member Experience verticals.
ReactNext.jsNode.jsAngularTypeScriptTurborepo
LogicSoft
Web Developer Intern
06/2021 — 07/2021Delhi, India
- Drove ManageTrace's innovation by integrating RESTful APIs, enhancing the traceability tool's UI/UX with a 40% user engagement boost.
- Implemented a Nodemailer system that streamlined query handling, increasing response efficiency by 30% and reducing update times by 50%.
ReactNode.jsJavaScript
case study · pocketpills
monolith → microfrontends
01/05
the starting point
One SSR monolith rendered everything — every change shipped the whole app, and every team queued on the same deploy.
education
Delhi Technological University
Bachelor of Technology in Computer Engineering
08/2018 — 09/2022Delhi, India
CGPA: 8.8/10Operating SystemsDBMSAlgorithmsData StructuresOOPSComputer Networks
technical skills
stack
Languages
TypeScriptJavaScript (ES6+)JavaC/C++HTMLCSS/SCSSSQL
Frameworks & Libraries
React.jsNext.jsReact NativeAngular (Universal SSR, Signals)Node.jsExpress.js
DevOps & Cloud
AWS (CloudFront, S3, ALB, EC2, CloudWatch)DockerNGINXJenkinsVercel
Testing & Tooling
JestESLintWebpackViteBabelSonarQubeYarnNPM
System Design
MicroservicesMicrofrontendsTurborepoServer-driven UIRedux / Redux ToolkitZustandREST / BFF / GraphQL
Databases
MongoDBSQLRedis
Observability
LighthouseSentryGrafanaKibanaMixpanelPostHogGoogle AnalyticsNew Relic
Additional Skills
WebViewNative Mobile IntegrationSDK developmentAccessibilityDebugging & Monitoring