Elena Rostova
Senior Full Stack Engineer
Professional Summary
Full Stack Engineer with 6+ years of experience delivering scalable web applications from responsive customer interfaces down to reliable database architectures. Specialized in React, Next.js, Node.js (TypeScript), PostgreSQL, and AWS. Proven track record of launching self-serve workflows used by 18,000+ business users, reducing operational handoffs by 34%, and optimizing end-to-end API roundtrip latency.
Technical Skills
Work Experience
- •Architected and delivered an end-to-end customer onboarding portal using Next.js 14 (App Router), Node.js, and PostgreSQL, increasing account activation by 19%.
- •Engineered client-side caching and state sync using TanStack Query and Zustand, reducing redundant API roundtrips by 45% and ensuring seamless offline draft recovery.
- •Designed normalized relational schemas and optimized indexing in PostgreSQL, reducing average query execution times from 520ms to 65ms on multi-million row analytics tables.
- •Configured Dockerized deployment environments on AWS ECS with automated GitHub Actions CI/CD pipelines, decreasing release deployment time from 45 minutes to 7 minutes.
- •Integrated Stripe billing, webhook validation, and automated subscription management, processing $4.2M in annual recurring revenue with 99.98% webhook delivery reliability.
- •Developed interactive data dashboards using React, TypeScript, and Tailwind CSS, standardizing 30+ reusable UI components across 3 product squads.
- •Built secure REST and GraphQL API services in Express and NestJS with JWT authentication and role-based access control (RBAC) across 4 permission tiers.
- •Implemented asynchronous background job processing using BullMQ and Redis, offloading intensive PDF export and email notification workflows.
- •Achieved 82% unit and component test coverage using Vitest, React Testing Library, and Supertest, eliminating critical regressions across 14 consecutive sprint releases.
Selected Technical Projects
Collaborative rich-text canvas supporting multi-user cursors, live document synchronization, and conflict-free version tracking.
- •Engineered Redis Pub/Sub backend handling 2,000+ concurrent active editor rooms with sub-50ms message propagation.
- •Implemented operational transformation algorithms ensuring seamless offline reconciliation and zero document overwrite conflicts.
Full-stack dashboard analyzing AWS billing data to identify idle compute resources across distributed clusters.
- •Identified unused compute and storage allocations, helping 40+ engineering teams reduce monthly cloud spend by an aggregate 16%.
Education
Vellore Institute of Technology, India (2016 – 2020)
First Class with Distinction; coursework in Web Engineering, Distributed Systems, and Database Systems.
Certifications
- AWS Certified Developer – Associate
- Meta Full-Stack Engineer Professional Certificate
