Fort Collins, Colorado, United States
Markus is a Full Stack Software Engineer with over 10 years of experience who specializes in building minimal viable products efficiently for early-stage startups to help them scale quickly. He works for international clients who value his expertise with frontend frameworks as well as his strong passion for topics like application performance optimization, dependency upgrades, code quality, technical SEO and accessibility. He also loves open source software and made code contributions to libraries of organizations like Microsoft, Svelte, react-boilerplate, Ethereum and many more in the past. He runs a blog on https://markushatvan.com and publishes his articles to platforms like freeCodeCamp, Hacker Noon or Medium to provide value to the public and to share the knowledge that he gathered over the years.
Backed by $60M from Insight Partners, Tiger, and thought leaders like Adam Grant, A.Team is the world’s first AI-powered team formation platform, enabling founders and engineering leaders to assemble flexible teams of top product, engineering, and design talent to build next gen products that drive measurable business results. As an Expert Frontend Guild Member, I’m part of an exclusive community of top, vetted experts that come together to lead innovation initiatives for industry leaders like HCA, Endeavor, and IDC.
Part of App Team - Built and shipped product features such as credits usage history, automated Solana decoding submission workflow, code editor SQL syntax autocompletion, and API integrations for Node.js services - Contributed significantly to the enterprise rebrand by reworking all app and marketing pages plus navigation redesigns in collaboration with external agency - Strengthened application security and compliance readiness through CSP and security headers, SOC2-related fixes, vulnerability remediation, and secure infrastructure improvements - Led frontend platform modernization initiatives across the monorepo, including migrations to pnpm, CJS to ESM, Vitest, Turborepo, and newer Node.js versions - Improved engineering quality and developer experience by introducing TailwindCSS, Playwright E2E testing, Storybook, Biome, Knip, stricter lint setup, React Compiler, and automated dependency/security maintenance through Renovatebot - Supported team operations through regular on-call rotations, conducting technical interviews, cross-team collaboration, and internal knowledge-sharing presentations on e.g. dependency upgrade strategy Website: https://dune.com and https://sim.dune.com Stack: Next.js, React, TypeScript, GraphQL, Vitest, Playwright, Turborepo, Vercel, Node.js, Prisma, Go, PostgreSQL, Grafana
Developing pre-transaction crypto widgets to guarantee compliance for companies such as eToro and Robinhood with the European Union's Markets in Crypto-Assets (MiCA) and Transfer of Funds Regulation (TFR) regulations. Website: https://goodbyefiat.notabene.id Tech-Stack: SvelteKit, Svelte, AppKit, WalletStandard, TypeScript, TailwindCSS, Vite, Vitest, Playwright, Cloudflare
- Built unified platforms for blockchain data computation, storage, and querying, known as sim Explorer (explorer.sim.io) and sim Studio (studio.sim.io), alongside a marketing website for sim (sim.io). - Implemented new features end to end from writing database queries until production release. - Worked closely with the Product Design team to ensure technical feasibility of UI/UX designs. - Led the strategic architectural transition to a Turborepo monorepo structure, selected and established best practices for a UI component library, and developed an efficient Storybook workflow. Stack: SvelteKit, Svelte, TypeScript, TailwindCSS, Vite, Vitest, Playwright, Storybook, Chromatic, Go, gRPC, PostgreSQL, Protobuf, Turborepo, Vercel
Created the Zorro (myzorro.co) application from the ground up, enabling companies to provide personalized health benefits customized to meet their employees' needs. Stack: Next.js, React, TypeScript, Mantine, Playwright, Nest.js, Nx, PostgreSQL, Prisma, Temporal, SendGrid, AWS, Frontegg, ClickUp