Senior Software Engineer at OneSpan

<div class="content-intro"><p>At <a href="https://www.onespan.com/about/careers" target="_blank">OneSpan</a>, we specialize in digital identity and anti-fraud solutions that create exceptional and secure experiences.</p></div><p><strong>OneSpan is currently looking for a Sr. Software Engineer (Python) to join our team in Barcelona.</strong></p> <p>We are building an advanced Android application protection tool focused on APK/AAB transformation, code obfuscation, and native code integration.&nbsp;</p> <p><span data-contrast="none">Our tooling analyzes and transforms Android applications at&nbsp;different levels, including bytecode and build artifacts, to implement protection and security mechanisms used in&nbsp;production&nbsp;mobile environments.&nbsp;</span></p> <p><span data-contrast="none">We are looking for a senior engineer who can help us evolve the architecture, maintainability, and scalability of the platform while mentoring a growing engineering team.&nbsp;</span></p> <p><strong>Job Duties and Responsibilities</strong></p> <ul> <li>Design, develop, and evolve our Android protection tooling written primarily in Python.&nbsp;&nbsp;</li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="auto">Improve the architecture, modularity, reliability, and maintainability of the system.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="auto">Work on complex transformation pipelines involving APK/AAB processing and code manipulation.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="auto">Contribute to performance optimization and scalability of the tooling.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="auto">Write clean, testable, and production-quality code.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="6" data-aria-level="1"><span data-contrast="auto">Improve testing strategies, CI/CD pipelines, release automation, and developer workflows.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="7" data-aria-level="1"><span data-contrast="auto">Mentor junior engineers and help grow engineering best practices across the team.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="8" data-aria-level="1"><span data-contrast="auto">Collaborate closely with Android and security engineers to design and implement new protection techniques.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="9" data-aria-level="1"><span data-contrast="auto">Participate in technical discussions, code reviews, and architectural decision-making.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="10" data-aria-level="1"><span data-contrast="auto">Design and develop our app protection tool using Python to support our platform and products.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="11" data-aria-level="1"><span data-contrast="auto">Work on challenging architectural and performance problems, contributing to the evolution of our systems.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="12" data-aria-level="1"><span data-contrast="auto">Write clean, maintainable, and testable code, ensuring high reliability and performance.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="13" data-aria-level="1"><span data-contrast="auto">Collaborate closely with mobile developers, backend engineers, product managers, and designers to deliver well-architected solutions.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="14" data-aria-level="1"><span data-contrast="auto">Improve the scalability, observability, and maintainability of our systems as the business grows.&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="7" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="15" data-aria-level="1"><span data-contrast="auto">Contribute to technical decision-making, code reviews, and architectural discussions.&nbsp;</span></li> </ul> <p><strong>Requirements</strong></p> <ul> <li>5+ years of professional software engineering experience using Python.&nbsp;&nbsp;</li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="none">Strong software architecture and system design skills.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="none">Experience building complex applications, developer tooling, CLI applications, or transformation pipelines.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="none">Strong understanding of software quality practices, testing, and maintainability.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="none">Experience mentoring engineers or leading technical initiatives.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="6" data-aria-level="1"><span data-contrast="none">Ability to work autonomously on technically challenging systems.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="7" data-aria-level="1"><span data-contrast="none">Strong analytical and problem-solving skills.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="8" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-aria-posinset="8" data-aria-level="1"><span data-contrast="none">Good communication&nbsp;skills in English.&nbsp;</span></li> </ul> <p><strong>Nice to have:</strong></p> <ul> <li>Interest&nbsp;or&nbsp;experience&nbsp;in&nbsp;security&nbsp;tooling, reverse&nbsp;engineering,&nbsp;or&nbsp;low-level&nbsp;systems.&nbsp;&nbsp;</li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="none">Familiarity&nbsp;with&nbsp;Android&nbsp;internals, APK/AAB&nbsp;structure,&nbsp;or&nbsp;mobile&nbsp;application&nbsp;tooling.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="none">Experience&nbsp;with&nbsp;bytecode&nbsp;manipulation,&nbsp;static&nbsp;analysis,&nbsp;or&nbsp;code&nbsp;transformation&nbsp;concepts.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="none">Familiarity&nbsp;with&nbsp;Dalvik&nbsp;bytecode&nbsp;/&nbsp;smali.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="none">Experience&nbsp;with&nbsp;Java&nbsp;or&nbsp;Kotlin.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="6" data-aria-level="1"><span data-contrast="none">Experience&nbsp;with&nbsp;reverse&nbsp;engineering&nbsp;or&nbsp;instrumentation&nbsp;tools&nbsp;such&nbsp;as JADX,&nbsp;apktool, Frida,&nbsp;Ghidra,&nbsp;or&nbsp;similar.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="7" data-aria-level="1"><span data-contrast="none">Experience&nbsp;working&nbsp;in Unix/Linux&nbsp;environments.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="8" data-aria-level="1"><span data-contrast="none">Experience&nbsp;with&nbsp;CI/CD pipelines and&nbsp;automated&nbsp;release&nbsp;systems.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="9" data-aria-level="1"><span data-contrast="none">Familiarity&nbsp;with&nbsp;Docker&nbsp;or&nbsp;containerized&nbsp;environments.&nbsp;&nbsp;</span></li> <li data-leveltext="·" data-font="Symbol" data-listid="6" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;·&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}" data-aria-posinset="10" data-aria-level="1"><span data-contrast="none">Knowledge&nbsp;of&nbsp;cryptography&nbsp;or&nbsp;application&nbsp;protection&nbsp;techniques.&nbsp;</span></li> </ul> <p>#LI-hybrid</p> <p>#LI-LS1</p>