Senior TypeScript Developer (Backend / Full-Stack)

<div class="content-intro"><p><strong>BidMachine Exchange</strong> – a fast-growing global programmatic exchange built for the future of in-app advertising.</p> <p>BidMachine operates with a strong US foundation and an international presence, with teams across Warsaw, Barcelona, Parkland (FL), and remote experts around the world.</p> <p>We combine deep AdTech expertise, proprietary technology, and a data-driven mindset to deliver transparency, performance, and efficiency in the mobile advertising ecosystem.<strong><br><br>Why BidMachine?<br></strong>At BidMachine, we are building more than an exchange — we are shaping the infrastructure that powers fair, efficient, and scalable in-app programmatic advertising.<br>Our mission is to create a high-performance marketplace where publishers maximize value and advertisers access premium inventory with full transparency and control.<br>We are proud of our technology, our ambitious vision, and our globally distributed team of talented professionals who continuously raise the bar in AdTech.</p> <p><strong>Here’s what we value, and what we hope you do too:</strong></p> <p><strong>Ownership &amp; Accountability</strong><strong><br></strong>We move fast, take responsibility, and think like builders. Every team member has a direct impact on product growth and market success.</p> <p><strong>Data-Informed Excellence</strong><strong><br></strong>We leverage data to make smarter decisions, optimize performance, and build scalable solutions that deliver measurable results.</p> <p><strong>Innovation &amp; Technical Depth</strong><strong><br></strong>We solve complex programmatic challenges with cutting-edge technology and a deep understanding of the ecosystem.</p> <p><strong>Global Collaboration</strong><strong><br></strong>We work across cultures, time zones, and disciplines — united by shared goals and high standards.</p> <p><strong>Ambition &amp; Impact</strong><strong><br></strong>We are here to build something significant — a best-in-class exchange that competes with the strongest players in the market.</p></div><p><strong>MGP - End-to-end ecosystem</strong> designed to empower mobile app developers to acquire, monetize, and retain users. The platform combines a sophisticated Mediation, Exchange and DSP with integrated analytics and insights, powered by proprietary know-how, continuous innovation, and cutting-edge AI.</p> <p>Your job will be focused on building <strong>MGP UI</strong> — a next-generation control plane that brings configuration, experimentation, and operational tooling into a single cohesive interface for our products. This is a greenfield project where you'll define the architecture, set technical standards, and shape how the team works.</p> <p>We’re looking for someone who is <strong>AI-native</strong>. You’ve integrated LLMs into your daily workflow — for coding, documentation, learning, and thinking through problems. But it goes beyond personal productivity: you’re excited about building AI-powered features into products. Natural language interfaces. Assistants that reduce cognitive load for users. You understand that AI is a tool with sharp edges — you know its failure modes, you validate its outputs, and you can teach others to use it effectively.</p> <p><strong>About the role:</strong></p> <ul> <li><strong>Own the architecture of MGP UI</strong> — make foundational decisions on stack, patterns, and boundaries that will scale with the product.</li> <li><strong>Write</strong> <strong>production</strong> <strong>TypeScript</strong> — backend services, APIs, and full-stack features when needed.</li> <li><strong>Establish engineering practices</strong> — code review culture, testing strategies, CI/CD standards, documentation norms.</li> <li><strong>Integrate AI into workflows</strong> — both internal tooling and product features.</li> <li><strong>Mentor</strong> engineers, conduct design reviews, and raise the technical bar across the team.</li> <li><strong>Collaborate</strong> cross-functionally with product, data, and platform teams.</li> </ul> <p><strong>Requirements:</strong></p> <ul> <li>5+ years of experience in software engineering.</li> <li>Deep TypeScript expertise — generics, conditional types, mapped types, type inference, type-safe API design.</li> <li>Backend architecture experience — scalable services, distributed systems, PostgreSQL, message queues, caching.</li> <li>AI fluency — you actively use Claude, GPT, Copilot, or similar tools in your daily work and can articulate where AI helps and where it fails.</li> <li>Strong communication — clear RFCs, constructive code reviews, ability to explain decisions to non-technical stakeholders.</li> </ul> <p><strong>Nice to Have</strong></p> <ul> <li>Experience with React / Next.js for full-stack work.</li> <li>UI/UX sensibility — you care about how interfaces feel, not just how they function. Experience with design systems, accessibility, or working closely with designers is a plus.</li> <li>Familiarity with ad tech domain (RTB, programmatic, exchange mechanics).</li> <li>Contributions to open-source TypeScript libraries or tooling.</li> <li>Interest in functional programming patterns applied to TypeScript.</li> </ul><div class="content-conclusion"><p>With a powerful product, strong market positioning, and a team that strives for excellence, BidMachine offers a unique opportunity to grow, innovate, and make a tangible impact in the programmatic advertising space.</p> <p><strong>Build the future of mobile AdTech with us!</strong></p></div>