Senior Software Developer

Onespan; Laza; Presencial; EUR 85.000 - 120.000; Jornada completa

Descripción de la vacante

OneSpan is seeking a Senior Software Developer (Full-Stack) to join our team in Barcelona. You’ll design, develop, test, and deliver our Mobile Application Security Platform, spanning frontend and backend systems.

You’ll build scalable services, intuitive UIs, and robust APIs, with CI/CD and automated builds driving frequent releases. Join a collaborative team that values architecture, code quality, and security.

Formación

• 5+ years of professional full-stack development.
• Experience building RESTful APIs and web apps.
• Experience with Python, Node.js or Java.
• Strong understanding of scalable system design.
• Experience with CI/CD and testing practices.

Responsabilidades

• Design and implement end-to-end features across frontend and backend systems.
• Build modern web interfaces and scalable APIs powering products.
• Translate requirements and wireframes into technical solutions.
• Write clean, testable code with good test coverage.
• Collaborate with product managers, designers, and engineers.
• Improve performance, scalability, and usability as the business grows.
• Contribute to architecture, code reviews, and best practices.
• Participate actively in team decision-making.

Conocimientos

5+ years experience

RESTful APIs

Full-stack development

Python/Node.js/Java

Software architecture

Testing methodologies

English communication

AI/LLM workflows

Independent collaboration

Herramientas

Docker

Git

Spring Boot

AWS

CI/CD

Descripción del empleo

At OneSpan , we specialize in digital identity and anti-fraud solutions that create exceptional and secure experiences.

OneSpan is currently looking for a Sr. Software Developer (Full-Stack) to join our team in Barcelona.

You’ll be involved in the design, development, testing, and delivery of our Mobile Application Security Platform, working across both frontend and backend systems. You will help build scalable services and intuitive user interfaces that enable our security technologies and products. You’ll find yourself working on modern web architectures, developing high-quality code with strong test coverage and frequent releases thanks to CI and automated build infrastructure.

Job Duties and Responsibilities

• Design and develop end-to-end features across frontend and backend systems.
• Build modern web interfaces and scalable backend APIs that power our products and services.
• Translate product requirements and wireframes into high-quality technical solutions.
• Write clean, maintainable, and testable code across the full stack.
• Collaborate closely with product managers, designers, mobile developers, and other backend engineers.
• Improve the performance, scalability, and usability of our platform as the business grows.
• Contribute to technical architecture, code reviews, and development best practices.
• Participate actively in the team’s life and contribute to technical decision-making.

Requirements

• 5+ years of professional experience in software development, working across frontend and backend technologies.
• Strong experience building modern web applications and RESTful APIs.
• Experience with backend development (Python, Node.js, Java, or similar).
• Good understanding of software architecture, design patterns, and scalable systems.
• Experience translating business requirements into technical designs.
• Understanding of testing tools and methodologies.
• Ability to communicate clearly in English, both verbally and in writing.
• Ability to work independently while collaborating effectively with a team.
• Programming with AI agents is part of your day-to-day work, including designing and orchestrating LLM-based workflows and integrating them into production systems.

Nice to have

• Experience with React and modern frontend ecosystems.
• Experience with Java frameworks (Spring, Spring Boot).
• Familiarity with cloud platforms (AWS, GCP, or Azure).
• Experience with containerization technologies such as Docker.
• Knowledge of CI/CD pipelines and DevOps practices.
• Knowledge about cryptography and/or PKI infrastructure.
• Experience with Git.
• Experience with Agile/Scrum methodologies.
• Strong analytical thinking and problem-solving attitude.
• Passion for continuous learning and improvement.

Why OneSpan

OneSpan offers the best of both worlds – a solid foundation that only an established global enterprise can provide, with the energy and creativity of an innovative start-up. In every role at OneSpan, you’ll contribute to the success of the most advanced cybersecurity and have opportunities to grow.

OneSpan’s cybersecurity solutions protect users, devices and apps. Its digital agreements solutions speed business processes via electronic signature.