Senior full-stack (frontend-leaning) engineer specialising in modernising legacy systems and delivering high-reliability consumer applications across web, mobile, and TV platforms. Deep experience in TypeScript architectures and web3 products, including live blockchain applications at scale. Known for technical judgement, ownership, and pragmatic delivery under constraint in complex, production environments. Strong background delivering end-to-end features across frontend and smart contracts, improving reliability and developer velocity through testing, modernization, and secure transaction flows.

Jack Pickett

Senior full-stack (frontend-leaning) engineer specialising in modernising legacy systems and delivering high-reliability consumer applications across web, mobile, and TV platforms. Deep experience in TypeScript architectures and web3 products, including live blockchain applications at scale. Known for technical judgement, ownership, and pragmatic delivery under constraint in complex, production environments. Strong background delivering end-to-end features across frontend and smart contracts, improving reliability and developer velocity through testing, modernization, and secure transaction flows.

Available to hire

Senior full-stack (frontend-leaning) engineer specialising in modernising legacy systems and delivering high-reliability consumer applications across web, mobile, and TV platforms. Deep experience in TypeScript architectures and web3 products, including live blockchain applications at scale.

Known for technical judgement, ownership, and pragmatic delivery under constraint in complex, production environments. Strong background delivering end-to-end features across frontend and smart contracts, improving reliability and developer velocity through testing, modernization, and secure transaction flows.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Language

English
Advanced

Work Experience

NFT Game Server (Designed and deployed) at Dapper Labs
October 1, 2024 - December 31, 2024
Designed and deployed a modular backend system for managing ERC-721 assets across multiple games and promotional activities. Refactored an existing prototype into a production-ready architecture, including migration from MongoDB to Postgres. Supports Ethereum and all EVM-compatible chains and enables rapid onboarding of new modules via a configuration-driven pattern.
Dapper Legacy Wallet Migration Tool (Sole engineer) at Dapper Labs
October 1, 2024 - April 30, 2025
Designed and implemented an open-source wallet migration tool for secure transfer of NFTs, including high-value assets such as CryptoPunks. Implemented on-chain authorisation flows using ABI-encoded contract interactions, including guarded execution pathways and secure administrative controls (address validation, operator gating, idempotent dispatch). Focused on transaction safety, auditability, and failure-resistant signing flows.
CryptoKitties Platform Refactor (Owned and executed) at Dapper Labs (CryptoKitties)
July 1, 2021 - Present
Owned and executed a multi-year refactor of the CryptoKitties codebase to reduce technical debt and modernise architecture. Migrated legacy systems to a Vite + TypeScript stack, introduced comprehensive automated testing (~98% coverage), and incrementally upgraded dependencies to improve maintainability, reliability, and developer velocity with minimal disruption to feature delivery.
Senior Full-stack Developer at Dapper Labs (CryptoKitties)
July 1, 2021 - Present
Responsible for ongoing maintenance and modernisation of the CryptoKitties platform, including reducing technical debt and improving system reliability. Delivered end-to-end features across frontend and smart contract interactions (breeding, marketplace, auctions, gene science). Contributed to product strategy, security practices for EVM-based systems, and third-party integrations such as OpenSea, addressing challenges arising from partial compliance with the final ERC-721 standard.
Lead Frontend Developer at The Economist Group (Signal Noise)
April 1, 2021 - July 31, 2021
Led frontend development for a React-based internal analytics platform used by Nike’s Asian sales division. Delivered the application across six two-week sprints with close collaboration across design and product. Implemented GraphQL-driven geographic (Mapbox) data visualisation, focusing on performance, usability, and actionable sales insights.
Senior Frontend Developer at To c k I n s u r a n c e - (Tock Insurance)
August 1, 2020 - December 31, 2020
Sole frontend engineer on a greenfield insurance platform responsible for delivering the core quote journey and overall user experience. Built a React application with GraphQL integration, focusing on performance, usability, and reliability of a conversion-critical flow. Defined frontend architecture/tooling and introduced automated testing (Jest, Enzyme, Cypress).
Tech Lead (Frontend) at Hopster (Sandbox Group)
April 1, 2020 - July 31, 2020
Returned for a second engagement to deliver a major Amazon Fire TV update and propagate architectural improvements across all platform builds.
Frontend Lead at DPLAY (Discovery Networks)
April 1, 2019 - March 31, 2020
Maintained and extended a multi-market TV application (Samsung, LG, Android TV) across seven international regions while leading a white-label React-based replacement. Defined frontend architecture, testing strategy (Jest, Cypress), and CI integration with DevOps. Led the transition from legacy TV frameworks (T.A.L.) to standardised maintainable frontend patterns using create-react-app and custom CI extensions, improving testability and long-term maintainability.
Tech Architect at Volkswagen UK (Tribal AdAm & EveDDB)
November 1, 2018 - March 31, 2019
Led frontend architecture for the Volkswagen UK ‘Next Generation Web’ initiative supporting transition to standalone React-based applications across multiple products (e.g. MyVW). Established local development frameworks and shared tooling using create-react-app to enable multi-application workflows. Defined component architecture, state management patterns (Redux), testing practices, and mentored team members new to React. Delivered a proof-of-concept for integrating React with Jahia CMS and extended build/CI pipelines (Jenkins, Artifactory) for production deployment.
Tech Lead (Frontend) at Hopster (Sandbox Group)
February 1, 2018 - November 30, 2018
Led frontend development for a multi-platform children’s VOD application (Amazon Fire TV, Roku, Xbox) built on the BBC’s TAL framework. Brought in to address performance issues and poor initial reception, focusing on reducing technical debt and stabilising the codebase. Refactored TAL-based architecture, upgraded framework dependencies, and introduced a consistent modular structure (AMD). Defined and implemented a Git branching strategy to support concurrent builds across multiple core technologies.
Senior Frontend Developer at Optiexpert (Coopervision / TF Spark)
May 1, 2017 - June 30, 2017
Stabilised a global React-based application for generating contact lens prescriptions across 100+ markets. Resolved critical data inconsistencies and complex branch integration issues, introducing a bespoke automated test suite to validate core business logic. Improved reliability of results and reduced regression risk across product variations.
Interim Tech Lead (part time) at Rebel Kitchen (Nurture Brands)
April 1, 2017 - September 30, 2018
Improved reliability and performance of a WordPress-based platform by introducing structured release workflows, staging environments, and automated deployment processes. Led migration to a new hosting environment (DigitalOcean), resolving performance and security issues (SSL, GDPR compliance).
Full-stack Developer at Digital Theatre Plus (Antiblanks)
January 1, 2017 - March 31, 2017
Delivered frontend features within a Drupal-based platform, contributing to a new theme and improving maintainability of legacy styles with structured SASS (BEM). Built dynamic UI components to support navigation across complex content types within a subscription-based service.
Senior Frontend Developer at Halfords (ANDigital ‘Spoke’ Team)
July 1, 2016 - December 31, 2016
Delivered frontend improvements for the Halfords website within a large-scale e-commerce platform (IBM WebSphere), focusing on performance, UX, and conversion optimisation. Identified and led redesign of header and mini-basket, resulting in a 45% increase in conversion during Black Friday. Refactored a legacy SASS architecture into a component-based system (ITCSS) and introduced supporting build processes (Gulp) and documentation. Contributed to team engineering improvements including peer review and component-driven development standards. Produced a MEAN stack proof-of-concept for an API-driven frontend architecture, influencing longer-term platform direction.
Independent Consultant / Tech Lead (Contract) at Half a Second Studios LTD
January 1, 2016 - December 31, 2018
Delivered frontend and full-stack solutions across multiple short-term engagements, often in lead or architect roles. Focused on modern JavaScript applications, performance optimisation, and system improvements.
Senior Frontend Developer at TFL Children’s Traffic Club (Tenalps)
June 1, 2015 - September 30, 2015
Led frontend development for an interactive educational platform commissioned by Transport for London, delivering responsive and accessible experiences across mobile and tablet. Built account creation and progress tracking within a structured journey system. Built interactive UI components and animations for game-based content, focusing on performance and usability. Collaborated with design, backend, and content teams and introduced Git-based workflows to improve code management and team collaboration.

Education

Music BA at Exeter University
January 1, 1995 - January 1, 1996
A Level (Music & English) at Richmond-upon-Thames College
January 1, 1992 - January 1, 1994
10 GCSEs + AO Level at St James School for Boys
January 1, 1986 - January 1, 1992

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Gaming, Financial Services, Media & Entertainment, Computers & Electronics, Other