Senior Frontend Engineer with 5+ years of experience building React and TypeScript applications, shipping production Web3/DeFi/fintech products. Specializes in frontend architecture, web performance, and AI-assisted development—delivering wallet-driven dApps and marketplace experiences used by hundreds of thousands of users.

Anne Anghelachi

Senior Frontend Engineer with 5+ years of experience building React and TypeScript applications, shipping production Web3/DeFi/fintech products. Specializes in frontend architecture, web performance, and AI-assisted development—delivering wallet-driven dApps and marketplace experiences used by hundreds of thousands of users.

Available to hire

Senior Frontend Engineer with 5+ years of experience building React and TypeScript applications, shipping production Web3/DeFi/fintech products.

Specializes in frontend architecture, web performance, and AI-assisted development—delivering wallet-driven dApps and marketplace experiences used by hundreds of thousands of users.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
See more

Language

Romanian, Moldavian, Moldovan
Fluent
English
Fluent
Korean
Advanced
German
Intermediate
Italian
Intermediate

Work Experience

Senior Frontend Engineer at Game7 DAO (Windranger Labs)
June 1, 2024 - Present
Engineered token distribution and NFT marketplace frontends for a global gaming ecosystem with 250,000 active users. Architected a multi-chain token distribution platform frontend with reusable patterns for wallet connectivity, smart contract interactions, and transaction workflows. Built reusable transaction state management for asynchronous blockchain operations with an optimistic UI to improve reliability across approval and execution flows. Reduced RPC requests via an event-driven marketplace data layer using indexed PostgreSQL events combined with selective on-chain reads. Prevented invalid token distributions using reusable approval workflows, real-time transaction previews, and automated input validation before on-chain execution. Increased frontend test coverage from 40% to 85% using Jest and React Testing Library for critical user journeys. Optimized Core Web Vitals, technical SEO, and accessibility for the company marketing platform, contributing to #1 Google rankings and inc
Frontend Engineer at Game7 DAO / Transaction Systems UK
June 1, 2024 - Present
Built end-to-end UI for cross-system asset transfers and transaction tracking. Delivered real-time, transaction-aware UIs (pending, confirmed, failed states). Collaborated cross-functionally to surface complex backend state and implemented reusable components to improve consistency and accessibility.
Frontend Engineer at Game7 DAO
June 1, 2024 - Present
Built transaction flows for ERC-20 payments, including approvals, batching, and allowance handling. Delivered real-time, wallet-aware UIs reflecting transaction states (pending, confirmed, failed). Implemented secure signing flows (EIP-712) for safe user interactions. Delivered a full-stack NFT marketplace with compliance checks (Circle API) and event-driven data pipelines (WebSockets + PostgreSQL). Built WebSocket-driven interfaces for live updates, similar to trading or asset-monitoring platforms.
Front end Engineer at Mantle Network (Windranger Labs)
August 1, 2022 - December 1, 2023
Built core DeFi products and portal interfaces for Mantle, leading the Ethereum layer-2 ecosystem with over $2B TVL. Designed and built the full frontend architecture for a DeFi lending platform, owning layers from configuration and wallet integration through transaction flows, real-time state management, and optimistic UI. Architected a split-rendering model: Next.js server components for zero-client JavaScript first load, and wallet-dependent dashboards as client components, pushing the use-client boundary to interactive leaf nodes to minimize bundle size. Implemented optimistic UI across transaction flows by snapshotting TanStack Query cache before mutations and restoring from snapshot on transaction failure, eliminating perceived latency from 12-second block confirmation times. Engineered a two-step approval and supply flow ensuring on-chain approval confirmation before supply execution to prevent silent transaction reverts. Engineered CI/CD pipelines with GitHub Actions, reducing
Frontend Engineer at Mantle
August 1, 2022 - December 1, 2023
Built dashboards for financial reporting, forecasting, and performance tracking. Integrated APIs to aggregate financial and operational data into a unified interface. Designed UI for budgeting, scenario modeling, and reporting workflows.
Frontend Engineer at Mantle Network
August 1, 2022 - December 31, 2023
Built dashboards for financial reporting, forecasting, and performance tracking. Integrated APIs to aggregate financial and operational data into a unified interface. Designed UIs for complex workflows (budgeting, reporting, forecasting).
Front end Engineer at Pectus Finance
January 1, 2022 - June 1, 2022
Developed financial dashboards for budgeting, forecasting, and KPI tracking with real-time data visualizations. Designed and implemented a design system as a React component library, establishing reusable UI primitives and design tokens documented in Storybook and covered by unit tests. Reduced network overhead by replacing polling with WebSocket-based market data streams. Integrated GraphQL and REST APIs into a unified analytics platform.
Frontend Engineer at Pectus Finance
January 1, 2022 - June 1, 2022
Delivered production-ready Web3 interfaces using React, Next.js, and TypeScript. Produced interfaces for DeFi protocols, including payments, wallet integrations, asset transfers, and real-time transaction flows. Focused on translating complex on-chain logic into intuitive, high-performance user experiences. Built React + TypeScript apps with REST/GraphQL integrations. Implemented SEO optimizations (technical and on-page), contributing to strong Google rankings.
Front end Engineer at Accolade Inc.
January 1, 2021 - December 1, 2021
Built accessible frontend applications and reusable design system components for a digital healthcare platform. Contributed to a shared design system using Storybook, standardizing UI components. Integrated REST APIs to display healthcare information and personalized member data. Implemented WCAG best practices using semantic HTML and ARIA attributes to meet accessibility requirements in a regulated healthcare environment. Refactored legacy React components by applying SOLID principles and established design patterns.
Frontend Engineer at Accolade Inc
January 1, 2021 - December 31, 2021
Frontend Engineer building web applications; contributed to UI development and performance improvements; collaborated with product and design teams to deliver robust interfaces.
Junior Front end Engineer at WundermanThompson
June 1, 2019 - December 1, 2020
Developed enterprise websites with responsive UI for global brands using Adobe Experience Manager (AEM). Built responsive, CMS-driven webpages for global brands like GSK and Ford. Improved page performance and Core Web Vitals by optimizing rendering, asset caching, and page structure. Delivered reusable components using JavaScript (ES6+), semantic HTML5, and SCSS.

Education

M.A. at Sogang University
January 1, 2000 - January 1, 2000
B.A. at University of Bucharest
January 1, 2000 - January 1, 2000
Exchange at Sapienza University
January 1, 2000 - January 1, 2000

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services, Gaming, Healthcare, Media & Entertainment, Other