Senior Software Engineer with 10+ years building SaaS products in fintech, cybersecurity, and e-commerce — from frontend architecture to backend services and infrastructure.

React · TypeScript · Node.js · Python · Fast API · WebSockets · GraphQL · Next.js (SSR/RSC) · LLM · Turborepo TanStack Query · Nx · Vite · Core Web Vitals · Playwright · Feature-Sliced Design · LLM APIs (Anthropic) · Docker · CI/CD · PostgreSQL · GitHub Actions

I shipped an LLM-powered code review assistant to production, built on the Anthropic API and embedded in GitHub Actions CI — compressing the automated feedback cycle from 2–4 hours to under 5 minutes per PR, and bringing TypeScript static analysis coverage across a Turborepo monorepo from 0% to 100%.

Over 5 years at ShelterZoom — an enterprise cybersecurity SaaS with real-time collaboration, document workflows, and e-signatures — I grew from Senior Engineer into Tech Lead, leading a 5-engineer team for the last 3. I drove the full migration from a monolithic frontend to a Turborepo monorepo, moved the team to weekly releases, and cut page load times by 35%.

What I'm good at: owning architecture end-to-end across frontend and backend, growing engineering teams and raising their bar, and turning a vague product brief into something scalable, secure, and performant.

Open to remote Senior Software Engineer, Staff / Principal Engineer, Tech Lead, and Architect roles in fintech, cybersecurity, and e-commerce. If you're building something where architecture — frontend or backend — is a product lever and not just a styling layer, let's talk.

• ⚡ 5× real-time collaboration performance on large-scale documents through virtualization and WebSocket state optimization — removed key latency bottlenecks in enterprise workflows.
• 🤖 LLM-powered code analysis assistant (OpenAI / Anthropic) with streaming UI and token management — cut component review time by 30%.
• 🔄 Real-time cross-device synchronization across web and mobile clients with consistent state reconciliation.
• 📝 Core document platform at ShelterZoom — led frontend for full e-signature system and a rich-text editor supporting complex document formats and extensibility.
• 🏗️ Monolith → micro-frontends migration — delivered an in-editor signing workflow embedded directly into enterprise document flows.

Senior Software Engineer · Cybersecurity / Document Intelligence SaaS · 51–200 employees

ShelterZoom is an enterprise cybersecurity SaaS - real-time document control, collaboration, and e-signature workflows for organizations.

• Designed and built backend services in Python (FastAPI) for the e-signature workflow engine, handling document state transitions, signer sequencing, and signature verification.
• Architected and shipped an LLM-powered code review assistant (Anthropic API) embedded in GitHub Actions CI - compressed automated feedback from 2–4 hours to under 5 minutes per PR; brought TypeScript static analysis coverage across a Turborepo monorepo from 0% to 100%.
• Led real-time collaboration performance from baseline to 5× improvement on large enterprise documents through WebSocket state optimization and virtualized rendering - eliminated critical latency bottlenecks in customer-facing workflows.
• Implemented asynchronous processing with RabbitMQ, decoupling document processing from the real-time API layer for reliability at scale.
• Built and maintained CI/CD pipelines via GitHub Actions, automating test and deploy across frontend, editor backend, and signature services.
• Owned the frontend architecture strategy; drove the full migration from a monolithic codebase to a Turborepo monorepo, consolidating web and mobile into a unified workspace with shared packages, typed contracts, and centralized CI - enabling weekly releases and +1.5× feature development velocity.
• Grew the frontend team from 2 to 5 engineers; built engineering standards and code review practices that made the team fully self-sufficient and promoted 1 engineer to senior; reduced engineer onboarding time by 40%.
• Led cross-functional delivery with product, design, and backend to ship a native e-signature system and a rich-text editor with full support for complex document formats - replacing external tooling and closing a critical enterprise gap.
• Refactored a monolithic codebase into a feature-based module architecture - improved team development velocity by 40% through reusable components and eliminated code duplication.
• Designed and implemented real-time cross-device state synchronization between web and mobile clients with conflict resolution - delivering consistent, seamless UX across all platforms.
• Led performance optimization across Next.js and TypeScript projects; reduced page load times by 35% and brought Core Web Vitals within target range.
• Shipped Document GPS - a browser extension for Gmail and Outlook enabling in-context smart-contract creation for blockchain-tracked documents - increasing content inflow by 25%.
• Implemented systematic fallback rendering and cross-browser compatibility strategy, reducing UI incident reports by 30%.

Senior Frontend Developer · Fintech · 51–200 employees SberVmeste is a Sberbank charitable donation platform enabling targeted, daily giving for users across Russia.

• Shipped the SberVmeste application including a donation calculator that drove a 25% uplift in first-time donors - a key conversion metric for the platform's social impact mission.
• Designed the frontend architecture and CI pipeline for future applications - reduced engineer onboarding time by 40% and established a weekly release cadence.
• Built an in-house payment system integrated directly into client dashboards.
• Delivered a customizable client management panel used by 50+ clients - cut support requests by 70%.
• Executed an incremental migration of 100+ Angular components to React with zero production downtime.
• Mentored 3 mid-level engineers: accelerated code review velocity by 2×; 1 promoted to senior within 12 months.

Middle Frontend Developer · Cybersecurity / SaaS · 11–50 employees

OpenText Cloudally is an enterprise-grade SaaS Data Protection Platform providing backup and recovery for cloud applications.

• Migrated the frontend to React 16 with SSR - cut time-to-interactive by 46% and improved organic SEO traffic by 32%.
• Built an interactive admin panel with automated content analysis, streamlining routine management workflows.
• Optimized the build pipeline with Rollup: reduced bundle size by 31% and accelerated dev builds by 2.7×.
• Implemented feature-based module architecture - increased feature development speed by 1.5×.
• Integrated Salesforce product suite for client onboarding flows - increased customer acquisition by 32%.

Middle Frontend Developer · E-commerce · 11–50 employees

• Optimized React applications via code splitting, lazy loading, and asset optimization, reducing LCP/TTI by 46%.
• Enhanced testing and reliability with React unit tests, achieving 96% coverage and reducing QA cycle time.
• Refactored feature modules in React and introduced feature flags, accelerating rollout of new features while minimizing production risks.
• Mentored junior developers in React best practices, standardizing coding patterns and speeding up onboarding.
• Streamlined React-based interfaces, including product listings and checkout flows, increasing experiment participation and improving conversion metrics by 33%.

Core
Frontend
Styling & UI
State & Data
Real-time
Architecture
Build & Perf
AI
Testing
Backend
CI/CD & Quality
Tools