Vetted Firebase Professionals

Jonathan McGrath

Screened ReferencesModerate rec.

Senior Full-Stack/AI Engineer specializing in mobile and web product development

San Francisco, CA14y exp

“Built an end-to-end mobile + web Q&A marketplace connecting users with professionals, including real-time chat and Stripe-based monetization (products/subscriptions). Hands-on with scaling Firebase/Firestore (subcollections, composite indexing, pagination) and mobile caching/sync challenges. Also created an internal AI-driven report generator that turned chatbot outputs into curated graphs and PDFs for marketing, iterating based on stakeholder feedback.”

Sivamalai Chandrasekar

Screened

Mid-level Forward Deploy Engineer specializing in cloud platforms and customer deployments

Aspen, CO4y exp

“Built and deployed VotingConnect end-to-end, owning everything from stakeholder discovery to architecture, full-stack implementation, and post-launch stabilization, with reported outcomes including 99.9% uptime and a 40% increase in voter participation. Currently works at SIXT on Cobra, an AWS-powered fleet management platform, where they focus on real-time data integrity, anomaly resolution, and reporting workflows that directly support operational and revenue decisions.”

“Frontend engineer (Teradata) who led an enterprise analytics dashboard end-to-end, building complex React + TypeScript interfaces with near-real-time updates and large data volumes. Strong track record in scalable frontend architecture, performance tuning (render optimization, payload reduction), and quality at speed via CI/CD, automated regression testing, and incremental rollouts in an Agile environment.”

“LLM/agent engineer who has built production multi-agent systems (LangChain/LangGraph) for enterprise workflows like email and calendar automation, with a strong focus on latency, tool-calling accuracy, and evaluation via LangSmith. Also worked on AI long-term memory using knowledge graphs at VEAI and communicated the approach and tradeoffs to CEO/CTO stakeholders.”

“Lifecycle/CRM marketer from Churchome who led a mobile app onboarding and re-engagement program using behavior-based segmentation, in-app/push messaging, and AI-assisted chat. Drove ~20% lift in early-stage engagement, improved 30-day retention, and reduced support load through automated chat flows and rapid A/B-driven iteration.”

“Unity/C# game developer with experience shipping F2P mobile systems, including loot/reward mechanics backed by probability/rarity/economy design and validated via unit tests, code reviews, and analytics instrumentation. Has implemented server-authoritative multiplayer state sync with matchmaking/RoomID flow, network variables/RPCs, and robust disconnect + reconnection state recovery.”

“Frontend engineer with fintech experience who has owned React Native/React + TypeScript architecture end-to-end, including feature-based modularization, reusable component libraries, offline support, and API optimization. Built a heavy analytics dashboard with real-time WebSocket updates and has shipped security-sensitive third-party payment integrations, including rapid post-release fixes via over-the-air updates.”

“Unity/C# gameplay engineer who built a designer-driven, remotely configurable ability system using JSON configs hosted on PlayFab, including runtime tracking and pooled VFX to handle frequent casts. Has shipped contract VR/AR work (HTC Vive, HoloLens) with strong performance focus (90 FPS) and also understands mobile live-service constraints like KPI integrations, memory/build size, and battery/CPU optimization.”

“Senior frontend engineer who led end-to-end delivery of a large ecommerce platform at Foschini Group and built a complex healthcare operations dashboard for UK-based Ceracare. Strong in React/TypeScript/Next.js architecture, design systems, and performance at scale, with a pragmatic approach to state management (React Query/Redux) and quality (Storybook + testing + code reviews).”

“Unity game developer who shipped a major core-mechanic change (“bowler quality”) for a bowling-sim game, using Firebase A/B testing and analytics to find the right difficulty/monetization balance and adding targeted onboarding to address player confusion. Also refactored a Photon-based multiplayer matchmaking/initialization “waterfall,” fixing a long-standing async host-selection bug that caused infinite loading.”