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Teya

Senior Full Stack Engineer

Teya

Senior Full Stack Engineer enhancing ePOS Integration for fintech startup Teya. Building scalable frontends and supporting backend services to empower partner developers.

Posted 7/9/2026full-timePorto • 🇵🇹 PortugalSeniorWebsite

Tech Stack

Tools & technologies
ApolloGraphQLJavaJavaScriptNext.jsReactReduxSpringSpring BootSpringBootTypeScript

About the role

Key responsibilities & impact
  • Lead the design, development, and delivery of scalable, responsive full stack features for the Business Account portal using React, TypeScript, and GraphQL.
  • Work closely with product and design teams to understand merchant needs and translate complex financial workflows 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.
  • Develop and maintain GraphQL schemas, resolvers, and API integrations.
  • Write clean, maintainable, and well-tested code across the stack.
  • Actively participate in code reviews across frontend and backend contributions.
  • Identify and resolve performance bottlenecks, data inefficiencies, and production issues across the full stack.
  • Stay up-to-date with the latest frontend technologies, trends, and best practices.

Requirements

What you’ll need
  • 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.

Benefits

Comp & perks
  • continuous learning opportunities
  • supportive community
  • comprehensive benefits

ATS Keywords

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Hard Skills & Tools
TypeScriptReact.jsGraphQLNext.jsJavaSpring BootJavaScript (ES6+)HTML5CSS3Redux
Soft Skills
Problem-SolvingAttention to DetailCommunicationCollaboration