Available to hire
Hi, I’m Jorge Beltrán Pastor. I’m a senior full stack engineer with a strong foundation in JavaScript/TypeScript, Node.js, React, and modern web technologies. I focus on clean, efficient software development and apply TDD, KISS, and SOLID principles to deliver robust, scalable solutions. I’m driven by continuous learning and enjoy shaping user-centric experiences through thoughtful engineering.
I actively engage with cutting-edge web tech, contribute to open resources such as MDN as a translator, and stay current with ECMAScript specifications and GitHub proposals. I mentor junior and mid-level developers, lead frontend architecture efforts, and collaborate closely with design, product, and DevOps teams to deliver polished, high-performance applications.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Spanish; Castilian
Fluent
Work Experience
Senior Full Stack Engineer at Contract
November 1, 2025 - February 28, 2026Develop high-performance REST services using TypeScript with Bun.js and PostgreSQL; integrate complex third-party APIs to extend product functionality. On the frontend, build and optimize marketing and landing pages with Next.js, React, and TailwindCSS; use Prisma ORM for data access; ensure SEO, accessibility, and performance. Integrate charts with TradingView and Chart.js. Collaborate with design and marketing teams.
Senior Frontend/Full Stack Engineer at Sphinx
June 1, 2024 - September 30, 2025Led frontend architecture of the exchange application using React, Zustand, and TanStack (React-Query). Integrated Cosmos blockchain capabilities and Keplr wallet via CosmJS and @keplr-wallet. Built the company stack with Cosmos SDK and extended blockchain functionality; contributed to gRPC, WebSockets, and API interactions; collaborated with Go and backend services.
Senior Frontend Engineer at Sphinx
January 1, 2024 - December 31, 2025Currently leading the frontend implementation of the exchange application using React, Zustand and TanStack libraries, integrating Cosmos blockchain and interacting with Keplr wallet through @cosmjs and @keplr-wallet. Role includes using gRPC, websockets and APIs with Go to build the company stack, and extending blockchain functionality with Cosmos SDK.
Senior Frontend Engineer at Contractor
October 1, 2023 - May 31, 2024Developed multiple applications for third-party clients using Next.js and Gatsby; integrated Web3.js for blockchain features; implemented robust REST APIs with Node.js/Express; helped QA with Playwright and Vitest; performed Python-based data simulations for analysis.
Senior Frontend Developer at Contractor
January 1, 2023 - December 31, 2024Starting the development of various applications for third-party clients using advanced React frameworks like Next.js and Gatsby, integrating Web3.js for blockchain functionalities. Role involved strategic use of Node.js with Express for REST APIs to create robust, scalable applications. Also contributing to QA by improving Playwright integration tests and Vitest unit tests.
Senior Frontend Engineer at Vosbor Exchange
January 1, 2021 - September 30, 2023Spearheaded frontend architecture, planning, and delivery of scalable web apps using React-Redux-TanStack; implemented micro-frontend architecture; established comprehensive test coverage with Cypress and Jest; collaborated with DevOps to integrate with CI/CD; designed multi-context frontend architectures to align with product goals.
Senior Frontend Developer at Contractor
January 1, 2020 - December 31, 2021Developed and integrated advanced frameworks such as Pixi.js for WebGL rendering and GSAP for dynamic animations. Implemented robust testing with Jest, and set up new projects using Parcel, Babel, and TypeScript.
Tech Lead Frontend at The Workshop
January 1, 2017 - December 31, 2020Coordinated UI tasks and ensured code quality across the team, developing web applications with Angular 2, RxJS, Mobx.js, and ngrx/store in TypeScript. Extended internal framework with reusable web components, defining and implementing testing protocols to maintain high standards.
Frontend Developer at William Hill
January 1, 2014 - December 31, 2017Frontend development for sports book applications with Node.js REST APIs, and extensive work with AngularJS, Express, and related technologies to enhance frontend functionalities.
Frontend Developer at Video Stream Network
January 1, 2012 - December 31, 2014Developed and refined a proprietary JavaScript framework, designing user interfaces, and creating custom jQuery UI widgets to enhance interactivity and user experience.
Frontend Developer at Némertes
October 1, 2010 - December 31, 2011Engaged in full-stack web development; crafted a proprietary JavaScript framework; designed user interfaces and built custom jQuery UI widgets; integrated with MySQL and Google Maps API to deliver comprehensive user-centered solutions.
Frontend Developer at Nemertes
January 1, 2010 - December 31, 2011Engaged in full-stack web development, crafting responsive designs with HTML, CSS, JavaScript, and .NET, and managing data interactions using MySQL and Google Maps API to deliver comprehensive user-centric solutions.
Education
Specialist in Multimarket Investment and Diversification at University of Hesperides
January 11, 2030 - January 1, 2026Master of Science in Computer Engineering at University of Alicante
January 11, 2030 - January 1, 2010Technical Engineering in Computer Systems (Degree) at University of Alicante
January 11, 2001 - January 1, 2007Master of Science in Computer Engineering at University of Alicante
January 1, 2010 - June 30, 2026Bachelors in Technical Engineering in Computer Systems at University of Alicante
January 1, 2007 - June 30, 2026Specialist in Multimarket Investment and Diversification at University of the Hesperides
January 1, 2026 - June 30, 2026Qualifications
Tech Meetup organizer
January 1, 2024 - January 1, 2026Mentor in Adalab Mentoring program
January 1, 2021 - December 31, 2023Intro to React
January 1, 2020 - December 31, 2020JS Day Canarias Speaker
January 1, 2019 - December 31, 2019Webpack: The Core Concepts & Web Fundamentals
August 1, 2018 - August 31, 2018Functional Programming Principles in Scala
January 1, 2017 - January 31, 2017React for Web Developers
March 1, 2016 - March 31, 2016M101P: MongoDB for Developers
January 1, 2014 - January 31, 2014GoLang Gibraltar Community member
January 1, 2014 - December 31, 2015Complete Intro to React
January 1, 2020 - June 30, 2026Webpack: The Core Concepts & Web Fundamentals
August 1, 2018 - June 30, 2026Functional Programming Principles in Scala
January 1, 2017 - June 30, 2026React for Web Developers
March 1, 2016 - June 30, 2026MongoDB for Developers (M101P)
January 1, 2014 - June 30, 2026Speaker, JS Day Canarias
January 1, 2019 - June 30, 2026Google Golang Community Member
January 1, 2014 - January 1, 2015Intro to React (Brian Holt)
January 1, 2020 - June 30, 2026Industry Experience
Software & Internet, Computers & Electronics, Agriculture & Mining, Financial Services, Telecommunications, Media & Entertainment, Professional Services
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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