David James Mitten

Antler digital is a startup that helps companies build digital products.

Responsibilities:

• Expanded One Tribe's development capabilities through Antler Digital partnership, complementing primary role by contributing to diverse client projects in parallel.
• Worked with MetaMask and Web3.js for blockchain integration for an NFT platform.
• Created systems with Payload CMS, ensuring a flexible and scalable content management system.
• Used github actions CI/CD for deployment locally and in production, ensuring a fast and reliable deployment process minimising human error.
• Created unit tests with Jest, ensuring a comprehensive and reliable testing strategy, wherever we had budget to do so.

Skills: JavaScript, React, Tailwind CSS, TypeScript, Next.js, Node.js, Express.js, MongoDB, Jest, Python, Django, FastAPI, docker, AWS, Payload CMS, Stripe, CI/CD, Git, GitHub, Contentful, Vercel

One Tribe is a carbon credit platform that allows users to track and offset their carbon footprint.

Responsibilities:

• Built custom BigCommerce application and engineered multi-platform webhook system integrating Magento, WooCommerce, BigCommerce, Shopify, Mailchimp, Gravity forms, etc. and marketing tools, processing thousands of daily events
• Contributed to fullstack applications using React, Next.js, and Node.js with TypeScript, supporting 100+ active users
• Collaborated with CTO to implement carbon milestone tracking system, managing environmental impact data for enterprise clients
• Supported UI modernization by implementing Tailwind CSS, reducing stylesheet size by more than 40%, and accelerating component development
• Developed custom Stripe payment processing handling $100K+ in revenue across multiple pricing tiers and products
• Assisted with the internal Next.js admin dashboard replacing Retool, reducing customer support response time, and saving a minimum of 15+ engineering hours weekly
• Establish CI/CD pipeline with GitHub Actions and Vercel, reducing deployment time
• Contributed to testing suite development achieving 75% coverage on critical paths Implemented SSR-generated carbon impact pages for 100+ brands, improving load times and SEO considerably
• Participated in code reviews and supported junior developers while maintaining quality standards
• Simplified onboarding process, significantly decreasing user drop-off rates
• Assisted in migration of 3GB of optimized text-based data from Firebase to Xata with zero downtime, improving query performance and handling 90,000+ cloud function invocations monthly

Skills: JavaScript, Next.js, React, TypeScript, Tailwind CSS, Stripe, Node.js, Express.js, Contentful, Vercel, Jest, GCP, Xata, PostgreSQL, MongoDB, Firebase, NextAuth (Auth.js)

Firstbase is a startup that helps companies bring remote working to their employees.

• Joined Firstbase as the founding engineer at pre-product stage, working directly with founders to architect and build the core platform that enabled enterprises to deploy and manage remote work operations at scale.
• Rapidly mastered Java/Spring Boot tech stack, progressing from initial learning to production deployment in one week while maintaining team's development velocity
• Strengthened platform quality through extensive test suite development, achieving 90%+ coverage across React components while implementing critical business features
• Enhanced platform accessibility to WCAG 2.1 AA standards, improving user experience for screen readers and assistive technologies

Skills: JavaScript, React, Java, Spring Boot, CSS, A11y, WCAG 2.1, Test Automation, Jest