Full-Stack Engineer - Onboarding (SDK)

About the role

Taktile helps financial institutions make smarter, safer decisions with the power of AI. Our software gives teams the tools to automate complex decisions, from customer onboarding and underwriting to fraud detection, with full visibility and control. By combining AI with a rich ecosystem of financial data, we enable companies to adapt their decision-making in real time as markets, customer behavior, and risks evolve.

We're looking for a Full-Stack Engineer to join the Web SDK team and help build a product that sits at the intersection of fintech and platform engineering. You'll contribute to the development of a unified client-side SDK that abstracts identity verification, device intelligence, and document capture behind a single, elegant integration, used by financial institutions to onboard customers securely and seamlessly. This is a high-impact role where you'll grow your skills rapidly while shipping meaningful work from day one.

If you've worked with modern JavaScript/TypeScript, have experience building front-end applications, and are excited about developing SDKs or developer-facing products that run in other people's browsers, we'd love to talk.

What You'll Do

• Build and extend the SDK: Contribute to a client-side JavaScript/TypeScript SDK that orchestrates multiple third-party vendor scripts behind a unified, headless API.

• Develop the hosted verification experience: Help build and improve a secure, embeddable web application that renders interactive identity verification flows with a polished, brandable UX.

• Ensure reliability: Contribute to versioning strategies, staged rollouts, and CI/CD pipelines for client-side code that runs in customer browsers.

• Tackle integration challenges: Work with vendor SDKs that each have their own quirks, lifecycle hooks, and failure modes, and help make them work together seamlessly.

• Collaborate across disciplines: Work closely with Product, Design, and senior engineers to refine the SDK's developer experience and deliver high-quality features.

• Engage with customers: Support early adopters by helping debug integration issues and ensuring the SDK works reliably across different environments.

Requirements

• Hybrid role based in Berlin. We collaborate in person regularly and don't offer remote-only for this position.

• Fluent English required. You'll write design docs, review PRs with context, and occasionally join customer calls.

• Solid engineering fundamentals across the full stack: you're comfortable working with both APIs and responsive, accessible front-end experiences.

• Good understanding of how browsers work: the DOM, security models (CSP, CORS, iframe sandboxing), caching, script loading, and performance.

• Comfortable working in production environments and willing to participate in incident response as part of a team rotation.

Required Experience

• 2–4 years of professional software engineering experience, ideally working on web applications or developer-facing tools.

• Production experience with TypeScript/JavaScript on both client and server. You've built modern front-end applications and have a solid understanding of bundling, tree-shaking, and cross-browser compatibility.

• Familiarity with iframe-based architectures, postMessage communication, or sandboxed execution environments is a strong plus.

• Some backend development experience (Python is a plus) — you're able to work with APIs and services that support the client-side layer.

• Prior experience with public cloud providers (preferably AWS).

Ideal, But Not Required

• Experience building or contributing to a client-side SDK, embeddable widget, or developer-facing JavaScript library.

• Exposure to identity verification, fraud prevention, or fintech - e.g., working with providers like Socure, Vouched, Onfido, Fingerprint, or ThreatMetrix.

• Familiarity with media APIs (camera access, image capture, WebRTC) and permission-driven UX flows.

• Interest in developer tools, documentation, or SDKs with a focus on great developer experience.

• Awareness of security and compliance considerations (SOC2, PII handling) for client-side applications in regulated industries.

Our Offer

• Work with colleagues that lift you up, challenge you, celebrate you and help you grow. We come from many different backgrounds, but what we have in common is the desire to operate at the very top of our fields. If you are similarly capable, caring, and driven, you'll find yourself at home here.

• Experience a truly flat hierarchy and communicate directly with founding team members. Having an opinion and voicing your ideas is not only welcome but encouraged, especially when they challenge the status quo.

• Learn from experienced mentors and achieve tremendous personal and professional growth. Get to know and leverage our network of leading tech investors and advisors around the globe.

• Receive a top-of-market equity and cash compensation package.

• Get access to a self-development budget you can use to e.g. attend conferences, buy books or take classes.

• Receive a new Apple MacBook Pro, as well as meaningful home office set-up.

Our Stance

• We're eager to meet talented and driven candidates regardless of whether they tick all the boxes. We're looking for someone who will add to our culture, not just fit within it. We strongly encourage individuals from groups traditionally underestimated and underrepresented in tech to apply.

• We seek to actively recognize and combat racism, sexism, ableism and ageism. We embrace and support all gender identities and expressions, and celebrate love in its many forms. We won't inquire about how you identify or if you've experienced discrimination, but if you want to tell your story, we are all ears.

About Us

Taktile helps financial institutions make smarter, safer decisions with the power of AI. Our software gives teams the tools to automate complex decisions like who to onboard, how to underwrite, or when to flag suspicious activity with full visibility and control.

By combining AI with a rich ecosystem of financial data, Taktile enables companies to adapt their decision-making in real time as markets, customer behavior, and risks evolve.

Our mission is to build the world's leading platform for automated decision-making in financial services, setting the standard for how AI is applied responsibly and effectively in this industry.

We were founded by machine learning and data science experts with deep experience in financial services. Today, our team works across Berlin, London, and New York, bringing together engineers, entrepreneurs, and researchers from companies like Google, Amazon, and Meta, as well as fast-growing startups and enterprise leaders.

Backed by top investors including Y Combinator, Index Ventures, Balderton Capital, and Tiger Global, along with the founders of Looker, GitHub, Mulesoft, Datadog, and UiPath, we're building a world-class organization across all functions and levels to power the next generation of AI-driven decision-making in financial services.