> Markdown version of [/jobs/ext/1353008-software-development-lead-marketplace](https://www.wearedevelopers.com/jobs/ext/1353008-software-development-lead-marketplace). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Development Lead - Marketplace - **Company:** BUYWANDER INC. - **Location:** Seattle, WA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, C Sharp (Programming Language), Code Review, Python (Programming Language), PostgreSQL, Software Engineering, Real Time Systems, Fastapi, Vue.js, Marketplace - **Published:** July 20, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=067fcc2cc7ef722f ## About the Role * 6+ years building and shipping consumer-facing web/mobile products at scale * Deep hands-on strength across the stack - comfortable owning both front end and backend services * Experience with real-time systems - live auctions, bidding, feeds, or similar high-concurrency products * Experience with marketplaces, auctions, or high-concurrency consumer apps * Search / relevance or recommendation / personalization systems experience * Notification and engagement / lifecycle systems at scale * A track record of leading technically as the senior builder - through code and architecture, not just meetings * Strong product instincts and an eye for customer experience, performance, and polish * A strong point of view on how AI is reshaping product engineering * Ability to move fast in a 0?1 / high-growth environment with imperfect requirements Our stack: C#/Python, FastAPI, Vue/Nuxt, PostgreSQL, real-time event streams. You don't need every one, but you should be dangerous across most of it. ## Description We're hiring a Software Development Lead - the most senior hands-on engineer on our customer-facing product. This is an IC+ role. You'll write code, set technical direction, and own the systems that power the buyer experience end to end: auctions, website/app, notifications, search, and personalization. You'll be the person who makes the marketplace fast, reliable, and addictive - and who raises the technical bar for everyone building alongside you. You won't inherit a finished product. You'll shape it. We have a foundation and momentum; we need a builder who can take the marketplace to the next level. We're looking for someone who is: * A hands-on builder first - you ship, and your code sets the standard * Product-minded - you care why a feature exists, not just how to build it * Obsessed with the customer experience - speed, polish, and delight matter to you * AI-forward - you use modern tools to move faster and build smarter WHAT YOU'LL OWN Real-Time Auctions * Own the auction engine that powers live bidding - real-time, accurate, and rock-solid under load * Handle the hard problems: concurrency, bid integrity, race conditions, and the spikes that come with a live marketplace * Partner with Data on auction design, demand signals, and pricing Website & App * Lead development of the buyer-facing web and mobile experience (Vue/Nuxt front end, Python/C# services) * Make it fast, intuitive, and fun - the treasure hunt should feel like a treasure hunt * Own performance, reliability, and the release process for the product customers touch every day Search & Discovery * Build search that helps people find - and stumble onto - items they'll love, across a constantly changing, one-of-a-kind inventory * Tune relevance, ranking, and browse for a catalog where no two items are alike Personalization * Turn browse ? bid ? win ? pickup behavior into a personalized experience * Partner with Data to surface the right items to the right customer at the right moment Notifications & Engagement * Own the notification systems (push, email, in-app) that bring customers back - outbid alerts, auction endings, new drops * Build engagement loops that drive the daily habit without becoming noise Technical Leadership (hands-on) * Set the technical direction, architecture, and quality bar for marketplace engineering * Mentor other engineers through code review, design, and example * Make pragmatic build-vs-buy-vs-integrate calls and own the outcomes * Partner closely with Product, Data, and Warehouse/Ops engineering to keep the full experience aligned, This one is different. Our inventory is chaotic and one-of-a-kind, our auctions are live, and our customers come for the hunt. You'll own the systems that turn that into a daily habit - and you'll have the autonomy and equity of someone shaping a category-defining product from the ground up. ## Related Videos - [The Alpha‑Developer of Tomorrow: Building the Future of the Software Development Lifecycle](https://www.wearedevelopers.com/videos/1401-the-alpha-developer-of-tomorrow-building-the-future-of-the-software-development-lifecycle) - [Intro to FastAPI](https://www.wearedevelopers.com/videos/462-intro-to-fastapi) - [Lessons learned from building a thriving Vue.js SaaS application](https://www.wearedevelopers.com/videos/1666-lessons-learned-from-building-a-thriving-vue-js-saas-application) - [Optimizing Discovery: PostgreSQL's Role in Transforming GetYourGuide's Search](https://www.wearedevelopers.com/videos/1647-optimizing-discovery-postgresql-s-role-in-transforming-getyourguide-s-search) - [Modern Headless Commerce with Vendure](https://www.wearedevelopers.com/videos/489-modern-headless-commerce-with-vendure) - [Building and Deploying Multi-Agent Systems with ADK and Vertex AI](https://www.wearedevelopers.com/videos/1918-building-and-deploying-multi-agent-systems-with-adk-and-vertex-ai) ## Related Articles - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [WeAreDevelopers Dev Digest Issue 116 - The new search wars…](https://www.wearedevelopers.com/magazine/445-wearedevelopers-dev-digest-issue-116-the-new-search-wars) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)