Senior Software Engineer

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 Engineer (Python) to join our team in Barcelona. You will be involved in the design, development, and testing of our app protection tool. You will work on building the basis of a high-performance protection tool, improving system reliability, and contributing to the architecture of our security solution.

You’ll find yourself researching and implementing cutting-edge technologies and security while writing high-quality code, including test coverage and frequent releases thanks to CI and automated build infrastructure. Job Duties and Responsibilities Design and develop our app protection tool using Python to support our platform and products.

Work on challenging architectural and performance problems, contributing to the evolution of our systems. Write clean, maintainable, and testable code, ensuring high reliability and performance. Collaborate closely with mobile developers, backend engineers, product managers, and designers to deliver well-architected solutions.

Improve the scalability, observability, and maintainability of our systems as the business grows. Contribute to technical decision-making, code reviews, and architectural discussions. Participate actively in the team’s life and help mentor other developers when needed.

Requirements

5+ years of professional experience in software development with Python. Solid understanding of software architecture, design patterns, and distributed systems. Experience translating business requirements into technical designs and scalable solutions. Experience with testing frameworks, unit testing, and test automation.

Ability to communicate clearly in English, both verbally and in writing. Ability to make recommendations and technical decisions independently. Strong collaboration skills and a team-oriented mindset.

Nice To Have

Experience solving architectural problems. Familiarity with containerization technologies (Docker, Kubernetes). Interest or experience in IT security technologies. Experience with Git and CI/CD pipelines. Experience on Android environment. Capacity to understand with Dalvik bytecode / smali. Java/Kotlin development experience.

Knowledge of Unix/Linux command line environments. Experience working in Agile/Scrum environments. Knowledge of cloud environments (AWS, GCP, or Azure). Knowledge of cryptography and/or PKI infrastructure. Strong analytical thinking and problem-solving mindset. 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.  #LI-hybrid #LI-LS1

OneSpan is a global leader in digital identity verification and security solutions. Established in 1991, the company has been at the forefront of enabling secure digital transactions and e-signatures. OneSpan's innovative technologies have revolutionized the way organizations authenticate users, detect fraud, and ensure regulatory compliance in the rapidly evolving digital landscape.

Through its cutting-edge products and services, OneSpan continues to drive the shift towards a more secure and...