This is us

At Avenga we build digital solutions that integrate seamlessly into the wider web ecosystem. Our mission is to create embedded web technologies that power smooth, secure, and scalable interactions between platforms. By blending full stack expertise with a user-first approach, we’re redefining how modern systems connect and communicate across domains.

This is the job

We’re seeking a Full Stack Developer to join our team and help drive the integration of our platform with third-party websites and services. You will design and implement interactive embedded components—such as action or payment buttons—and ensure they securely trigger workflows on our system. This role is key to enhancing our product’s connectivity, user experience, and architectural flexibility.

You’ll work in a 3x2 hybrid in-person model, collaborating with cross-functional teams to deliver end-to-end features that are robust, responsive, and integration-ready.

This is you

Proven experience in full stack web development, handling both frontend and backend responsibilities

Skilled in developing embedded web solutions, including interactive buttons or widgets for third-party integration

Proficient in RESTful API development, documentation, and integration with external systems (callbacks, redirects, secure endpoints)

Fluent in modern web languages and frameworks:

Frontend: HTML, CSS, JavaScript (React or Vue preferred)

Backend: Node.js, Python, or similar backend technologies

Understanding of web authentication and security practices, including OAuth2, token handling, CORS, and data protection

Experienced in event-driven communication across sites using postMessage, event listeners, and secure redirection

Effective collaborator with a problem-solving mindset, comfortable in hybrid work environments

Nice-to-have skills

Experience with serverless architecture (e.g., Azure Functions)

Familiarity with webhooks and async event handling

Background in platform integration or B2B SaaS environments

Exposure to embedded commerce or payment solutions

This is your role

Design, build, and maintain full stack solutions to support embedded components for integration into external websites and apps

Develop and expose RESTful APIs that facilitate secure, scalable platform integrations

Implement authentication and authorization flows (OAuth2, tokens) to ensure secure transactions and user interactions

Create and manage cross-site communications using postMessage, custom events, and secure redirects

Collaborate with product, design, and architecture teams to align on embedded UX and functionality

Optimize for performance, reusability, and long-term scalability of components and integrations

Contribute to the adoption of serverless and event-driven architectures where applicable

Participate in team ceremonies and in-person collaboration days (3x2 hybrid schedule)