Senior Full-Stack Engineer (Human)

About Us  Hawk is the leading provider of AI-supported anti-money laundering and fraud detection technology. Banks and payment providers globally are using Hawk’s powerful combination of traditional rules and explainable AI to improve the effectiveness of their AML compliance and fraud prevention by identifying more crime while maximizing efficiency by reducing false positives. With our solution, we are playing a vital role in the global fight against Money Laundering, Fraud, or the financing of terrorism. We offer a culture of mutual trust, support and passion – while providing individuals with opportunities to grow professionally and make a difference in the world.  Your Mission As a Senior Full Stack Engineer at Hawk, your mission is to build the engine and the experience for our agentic AI Investigation Agent — a new product that fundamentally rethinks how human analysts collaborate with autonomous AI to investigate financial crime. You will own features end-to-end: from the LangGraph workflow that drives the agent's reasoning, through the FastAPI services and Postgres/Redis infrastructure that make it reliable at scale, all the way up to the React/shadcn UI that surfaces the agent's findings to analysts. This is a high-ownership role for someone who refuses to throw work over the wall — you ship the whole feature, and you ship it well. Key Responsibilities * Design, build, and operate the backend systems that power the Investigation Agent: LangGraph workflows, FastAPI services, Postgres and Redis data layers, Kubernetes deployments, and Langfuse-based observability and evaluation. * Build the frontend surface that makes the agent's work legible: React + TypeScript components in shadcn/ui that surface agent reasoning, evidence, and explainability so analysts can trust, challenge, or take over. * Own features end-to-end. You take a problem from spec to production — backend, frontend, infra, observability, evals — without waiting for someone else to finish their part first. * Make the agent reliable. Build the eval harnesses, tracing, and feedback loops in Langfuse that turn "the model usually does the right thing" into "the model demonstrably does the right thing, and we know when it doesn't." * Partner closely with Product/UX, Data Science, and the rest of Engineering to shape what gets built — not just how. You question the "why" behind features and push back when something doesn't feel right. * Champion an AI-native engineering workflow. You use Claude Code, Cursor, or equivalent agentic coding tools as a daily part of how you work, and you help raise the bar for how the team uses them. If you find yourself doing the same thing twice, your natural instinct is to automate it. * Help establish engineering best practices for agentic products at Hawk: how we test agents, how we deploy them, how we monitor them, how we roll back when they misbehave. Your Profile * 4+ years of professional software engineering experience, with substantial hands-on time in both Python and TypeScript/React. (Note: We are open to exceptional candidates with 2-3 years of experience if they demonstrate a remarkably strong track record.) * Deep backend expertise: Python, FastAPI, Postgres, Redis, and comfortable operating services on Kubernetes in production. You understand the difference between code that works and code that works at 3am under load. * Strong frontend chops: React, TypeScript, and modern component libraries (shadcn/ui or Material UI). You don't need to be a designer, but you care about how the thing looks and feels and you can build a clean, performant UI without supervision. * Genuinely full-stack mindset. You don't think of yourself as "a backend engineer who can do some frontend" or vice versa — you think of features, and you build them. * Hands-on fluency with agentic coding tools (Claude Code, Cursor, or equivalent) as part of your daily workflow. You have an opinion about what they're good at, what they're not, and how to get the most out of them. * Excellent holistic thinking and problem-solving skills. You shape the product rather than execute pre-defined tickets. * Excellent communicator with a collaborative mindset, capable of articulating technical trade-offs to both technical and non-technical stakeholders. Bonus * Production experience with LangGraph (or equivalent agent orchestration frameworks) and Langfuse (or equivalent LLM observability/eval tooling). * Prior experience in Anti-Financial Crime (AML, fraud, compliance, or investigations tooling) — or a deep curiosity to go learn the domain fast.

Hello. We’re Teya. Teya was founded on a simple belief: local businesses deserve better. They are the cafés, restaurants, salons, shops and entrepreneurs that bring character to our high streets, create jobs and keep communities moving. Yet for too long, financial services has made life harder for them - with clunky tools, poor support and complexity that gets in the way of running a business. Teya exists to change that. We’re building a financial platform for local businesses across Europe - one built around simple tools, thoughtful design and real human support. Our Members rely on us to help them run their business with confidence, and that responsibility shapes the way we work. We move fast. We care about quality. We stay close to the detail. And we believe great performance and genuine hospitality should go hand in hand. If you want to build meaningful products, solve real problems and make a genuine difference for local businesses, we’d love to hear from you Key Responsibilities * Lead the design, development, and delivery of scalable, responsive full stack features for the Business Account portal using React, TypeScript, and GraphQL, with ownership spanning both frontend implementation and integration with backend services. * Work closely with product and design teams to understand merchant needs and translate complex financial workflows—such as transfers, scheduled payments, account management, and Strong Customer Authentication (SCA) flows—into secure, end-to-end user experiences backed by reliable APIs. * Build and maintain data-rich, high-performance interfaces for transaction feeds, balances, statements, and multi-currency views, ensuring efficient data fetching, state management, and seamless interaction with backend services. * Develop and maintain GraphQL schemas, resolvers, and API integrations, ensuring consistency between frontend requirements and backend data models while promoting type safety and end-to-end reliability. * Write clean, maintainable, and well-tested code across the stack, applying strong TypeScript practices and contributing to overall system stability, security, and scalability. * Actively participate in code reviews across frontend and backend contributions, helping establish engineering best practices in a team transitioning from a mobile-first to a full stack, web-capable organization. * Identify and resolve performance bottlenecks, data inefficiencies, and production issues across the full stack, ensuring a smooth, reliable experience for merchant users. * Stay up-to-date with the latest frontend technologies, trends, and best practices, applying them to enhance our merchant-facing web platform. Your Story * 5+ years of professional experience in frontend/web development. * Expert-level proficiency in TypeScript, including advanced type manipulation, generics, and understanding of complex type inference. * Strong proficiency in React.js and its core principles, developed with a type-safe approach. * Experience supporting Backend services in Java and Spring Boot * Extensive experience with Next.js for server-side rendering, static site generation, and API routes, with a focus on TypeScript integration. * Solid understanding of modern JavaScript (ES6+), HTML5, and CSS3. * Experience with state management libraries (e.g., Redux, Context API, Zustand) in a TypeScript environment. * Strong experience consuming GraphQL APIs (e.g., Apollo Client), with an understanding of how to define and use types for API responses. * Strong understanding of web performance optimisation techniques. * Experience with version control systems (e.g., Git). * Excellent problem-solving skills and attention to detail. * Strong communication and collaboration abilities, especially when working within cross-functional teams spanning product, design, backend, and mobile engineering. Differentiators (What Sets You Apart) * Experience in fintech or banking web applications, including secure and compliant interfaces with SCA/2FA, PSD2, and RBAC * Proven ability to build and translate mobile-first products into responsive web experiences * Practical use of AI coding tools (e.g. GitHub Copilot, Claude Code, Cursor) to accelerate development while maintaining code quality * Experience launching and localising web products across multiple European markets, including currency, regulatory, and language requirements Teya is proud to be an equal opportunity employer. We are committed to creating an inclusive environment where everyone regardless of race, ethnicity, gender identity or expression, sexual orientation, age, disability, religion, or background can thrive and do their best work. We believe that a diverse team leads to better ideas, stronger outcomes, and a more supportive workplace for all. If you require any reasonable adjustments at any stage of the recruitment process whether for interviews, assessments, or other parts of the application—we encourage you to let us know. We are committed to ensuring that every candidate has a fair and accessible experience with us.