Ryan Yudantara

Senior Web3 Frontend Focused Full Stack Engineer with 9+ years of experience building scalable decentralized and cloud-based applications using React, Next.js, TypeScript, and modern frontend architectures, supported by strong backend experience in Node.js and PostgreSQL. Proven track record delivering high-performance DeFi platforms, Web3 applications, and real-time financial interfaces that handle complex on-chain transactions, tokenized assets, and data-intensive workflows.

Strong expertise in designing intuitive, responsive user experiences using component-driven architecture, state management, performance optimization, and real-time data handling, while integrating wallet connectivity, smart contract interactions, and blockchain data into seamless frontend workflows. Experienced building interactive dashboards, trading interfaces, and data-heavy UI systems that present complex financial data clearly and efficiently. Comfortable working across the stack to support frontend scalability through well-designed APIs, microservices, and optimized data pipelines, ensuring reliable communication between frontend applications and distributed backend services.

Demonstrates strong ownership mindset and proactive problem-solving approach, continuously improving usability, performance, and developer experience in fast-paced environments. Effective collaborator in distributed teams, partnering closely with product managers, designers, and backend engineers to translate complex technical requirements into scalable, user-friendly solutions. Passionate about building the next generation of internet-native financial products, combining Web3 technologies, real-time systems, and modern TypeScript ecosystems to deliver high-impact users

Ondo Finance Apr 2025 - Present

Senior Web3 Frontend Engineer

Architected and delivered end-to-end DeFi platform features across React, Next.js, TypeScript, Node.js (NestJS), and PostgreSQL, enabling secure lending, borrowing, and portfolio management workflows handling high-volume on-chain financial transactions.

Spearheaded the design of scalable API and SDK architecture using Node.js, RESTful APIs, enabling internal teams and external partners to reliably integrate with core DeFi services through well-structured versioning, strong validation, and backward-compatible interfaces that supported long-term platform stability and growth.

Built high-performance real-time data features using event-driven architecture, WebSockets, Redis caching, and optimized database queries, leveraging microservices, RESTful APIs, and asynchronous processing to enable low-latency transaction flows, including cross-chain user operations such as bridging, swapping, routing assets, and interacting with smart contracts across multiple networks.

Developed responsive Web3 interfaces using React, Next.js, TypeScript, and Tailwind CSS, implementing modern state management (Redux, Zustand, TanStack Query) and integrating wallet connectivity via wagmi, viem, and ethers.js, ensuring reliable synchronization of blockchain data, wallet states, token balances, and transaction activity across complex UI workflows.

Optimized frontend and backend performance through profiling, caching strategies, lazy loading, memoization, and database query tuning, reducing p95 latency by 35–45% and improving responsiveness of data-intensive DeFi analytics dashboards.

Implemented secure authentication and transaction flows including JWT-based identity validation, wallet signature verification, role-based authorization, and secure interaction with smart contracts and Web3 providers.

Designed modular full-stack architecture leveraging React, Node.js, RESTful APIs, and PostgreSQL, enabling scalable development of DeFi financial primitives such as lending pools, liquidity optimization engines, and transaction orchestration layers, improving system flexibility and performance through optimized database indexing, query tuning, and efficient API design patterns.

Established strong engineering standards including reusable component libraries, shared TypeScript schemas, API validation layers, and consistent coding patterns that improved maintainability and accelerated feature delivery across the engineering team.

Designed CI/CD pipelines using GitHub Actions, Docker, and AWS infrastructure, enabling automated testing, containerized deployments, and reliable release workflows for full-stack services supporting critical financial transactions.

Collaborated cross-functionally with protocol engineers, product managers, and designers to translate complex DeFi requirements into scalable technical solutions, balancing performance, security, and usability to deliver measurable product impact.

Improved developer experience and engineering velocity by introducing clear API contracts, testing standards (Jest, Playwright, Vitest), and documentation practices that enabled faster onboarding and consistent contribution across distributed teams.

Led and mentored engineers across frontend and backend development, driving design reviews, improving TypeScript architecture standards, proactively identifying performance and scalability improvements that strengthened reliability of high-volume DeFi services.

Antares Consulting Oct 2021 - Apr 2025

Full Stack Engineer

Worked in a consulting environment, delivering end-to-end full-stack solutions for fintech, digital banking, SaaS, and blockchain clients, consistently shipping production-ready features within tight timelines

Spearheaded development of modern web applications with React, Next.js, Vue.js, and TypeScript, using Tailwind CSS and Material UI to create responsive dashboards that reduced page-load time and increased user satisfaction

Engineered scalable backend services using Node.js, NestJS and Python, exposing RESTful and GraphQL APIs for payments, reporting, and real-time workflows, powering cross-product integrations and improving user experience.

Optimized complex, data-driven frontend applications, including a real-time IM chat system used by millions of enterprise users, by rapidly iterating on customer feedback to improve performance, state management, and WebSocket workflows using React and TypeScript, while making real-time data accessible through clear, intuitive user experiences at scale.

Delivered end-to-end full-stack product features across WebApp and API systems using React, TypeScript, Node.js, and PostgreSQL, independently managing implementation, integration of third-party APIs, and deployment in fast-paced startup environments.

Refactored legacy mobile features into a modern React Native and TypeScript architecture, improving performance, component reusability, and API integration reliability across iOS and Android platforms.

Developed Solana-based mobile Web3 games with NFT integration, implementing smart contract interactions, wallet connectivity, and on-chain transaction flows to support tokenized assets, secure ownership verification, and high-performance gameplay experiences.

Built and maintained full-stack integrations for DEX and DeFi workflows using React, TypeScript, Node.js, and Web3 libraries (ethers.js, web3.js), enabling secure token swaps, liquidity management, and real-time transaction updates, with expertise in DeFi concepts such as AMMs, lending, and liquidity provision.

Built intelligent application features by integrating LLM APIs into Vue.js and Node.js platforms to enhance smart search and automated content generation, and implemented onboarding flows connecting users to decentralized perpetual futures exchanges across multiple chains including Hyperliquid and Solana, enabling seamless asset movement, trading access, and liquidity participation.

Implemented enterprise-grade transactional workflows and reporting services using Node.js (Express, NestJS) and Python, leveraging PostgreSQL and MySQL with schema migrations, data validation, and transactional integrity controls to ensure data accuracy, auditability, and consistency across critical business processes.

Designed and deployed cloud-based applications on AWS and Azure, using Docker for containerization and GitHub Actions for CI/CD automation, improving deployment consistency and scalability across fintech, SaaS, blockchain projects while reducing release effort.

Optimized frontend and mobile performance in React, React Native and Next.js applications using code splitting, memoization, and efficient state management, improving load speed and responsiveness by up to 35%.

Implemented comprehensive automated testing across backend and frontend with Jest, Vitest, React Testing Library, Cypress, and Playwright, covering unit, integration, API, and end-to-end flows, which reduced production defects and increased release reliability

Collaborated with product managers, designers, and remote teams to translate business requirements into maintainable technical solutions using Vue.js, TypeScript, React Hooks, and delivered features that improved user satisfaction and reduced post-release bugs.

KoinWorks Sep 2020 - Oct 2021

Junior Web Developer

Developed responsive, data-driven user interfaces using React, JavaScript, HTML5, CSS3, and Bootstrap, transforming complex API responses into real-time dashboards and workflow tools improving visibility of operational data and business processes.

Engineered reusable UI components and interactive features using React and modern JavaScript patterns, improving cross-browser compatibility, component maintainability, and responsive behavior across high-traffic desktop and mobile web applications.

Collaborated closely with UI/UX designers to translate Figma designs into pixel-accurate React implementations, ensuring consistent layout structure, accessibility compliance, and alignment with enterprise branding and usability standards.

Implemented backend integrations using Node.js services, developing form handling logic, REST API endpoints, and internal tooling integrations supporting structured data workflows and improving efficiency of client business operations.

Optimized relational database performance using PostgreSQL and MySQL through query refactoring, indexing strategies, and structured schema improvements, reducing response latency by approximately 18% across high-traffic reporting applications.

Improved backend stability and release reliability by implementing unit testing practices with MSTest and structured GitLab CI workflows, ensuring consistent build validation and reducing regressions across production deployments.

Contributed to development of internal tools using JavaScript, Node.js, HTML, CSS, and jQuery, building lightweight dashboards and automation utilities improving operational efficiency and reducing repetitive manual data-processing tasks.

Integrated CMS platforms and third-party services into React applications through REST APIs, enabling non-technical teams to manage content independently and improving efficiency of publishing workflows across client platforms.

Hasselt University

Bachelor's degree, Computer Science

Sep 2012 - Oct 2016