Web SDK Engineer

About the role

Microblink is the Identity Intelligence OS that establishes Know Your Actor: control over people and agents, how risk is assessed, and how decisions are made across digital journeys. Built for an adversarial AI era, Microblink replaces static verification with continuous identity control. As the only solution spanning IDs, biometrics, and payment cards, Microblink delivers a real-time command center where signals, policies, and decisioning can be calibrated with granular precision. Companies use Microblink to adapt faster than fraud, optimize outcomes over time, and enforce trust at scale across onboarding, authentication, and every moment in between. In 2025, Microblink processed 2.9 billion identities across 195+ countries/territories. Its proprietary Fraud Lab generates 100,000+ images monthly for training and testing models, achieving 100% deepfake detection in DHS-powered testing. Interested to learn more? Explore our tech in action . As we continue to scale, we're looking for a Web SDK Engineer to help us build highly reliable, developer-friendly SDKs used globally. As a Web SDK Engineer, you will play a key role in building and improving our web-based SDKs, focusing on performance, stability, and developer experience. You'll work in a highly collaborative environment alongside product managers, QA, and cross-platform engineering teams to deliver best-in-class solutions.

Responsibilities

• Build highly stable and reliable Web SDKs used by clients worldwide
• Collaborate with product owners, QA, and engineers across Android, iOS, Web, and C++ teams
• Work closely with product and engineering teams to define requirements and design scalable interfaces
• Contribute to decisions around end-user experience and developer experience , ensuring seamless SDK integration
• Develop and maintain cross-platform SDK capabilities (e.g., React Native, Flutter)
• Improve and automate release and publishing processes
• Mentor engineers and contribute to team growth
• Help define and improve engineering practices, tools, and processes

Requirements

• Strong proficiency in TypeScript/JavaScript and modern web development
• Deep understanding of:
• Browser APIs
• Memory management
• Concurrency (Web Workers, async/await)
• Performance optimization in browser environments
• Experience with web architecture and modern ecosystem tools (npm (bun/pnpm), Vite, Turborepo)
• Proven experience designing reusable libraries, APIs, or SDKs
• Strong focus on API design, backward compatibility, and developer experience
• Ability to build solutions that work across different environments (vanilla JS, frameworks like Solid.js/React.js/Angular.js/Vue.js)
• Familiarity with tools like Emscripten and understanding of WASM execution and memory models
• Experience with WebAssembly (WASM) and C++ interoperability
• Experience with cross-platform frameworks (React Native and/or Flutter)
• Experience building bridges/plugins between native (Android/iOS) and cross-platform layers
• Here's what you'll gain if you join us
• Microblink owes its success to its people. That is why we offer equity participation to all of our full-time employees so that we can grow together
• Unlimited PTO, giving you the flexibility to take time off as needed to maintain a healthy work-life balance
• Location-specific benefits tailored to meet diverse personal preferences and country standards
• Flexible work arrangements, allowing you to adjust your schedule-whether working remotely or at our Zagreb or New York office
• Opportunities to learn and develop your skills through internal L&D programs and a supportive working environment
• How can you join us
• We are reviewing applications from candidates based in Croatia, Serbia, Romania, and Bulgaria. Candidates must have residency and work authorization in one of these countries. We do not offer visa sponsorship or B2B engagement at the moment.
• At Microblink, we nurture a culture that recognizes and rewards success, and is not afraid to try, fail and learn from mistakes. Find out what it feels like to work at Microblink
• If this role intrigues you, do not hesitate to hit the apply button and send us your resume. Get in touch with us and we promise to get back to you.
• For detailed information on how we process p

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