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Senior Full Stack Engineer

PortoPosted 13 Sept 2026

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About this role

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.

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- 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.

Source listing: ashby_teya

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