Senior Software Engineer C++

IDnow is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention. Through its broad portfolio of digital identity and fraud prevention solutions, IDnow establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability. The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries. This position is based in Rennes, France. We are seeking a highly skilled and experienced Senior C++ Developer to join our dynamic team working on structured documents analysis (Identity cards). Your mission will be to enhance and maintain this vital service, improving its efficiency and accuracy. Key Responsibilities Software Development: Design, develop, and maintain C++14/17/20 applications, libraries, and services for processing structured documents efficiently and accurately. Optimization & Architecture: Identify and implement performance improvements in existing document processing code, optimising speed and accuracy. Refactor and evolve the internal service architecture to address emerging technical challenges and scalability requirements. Collaboration: Work closely with cross‑functional teams, including data scientists, product managers, QA engineers, and other developers, to deliver document processing solutions. Troubleshooting: Investigate and resolve complex technical issues in document processing, ensuring reliability and accuracy of the service. Preferred Experience Bachelor's or master’s degree in computer science or related field. 5+ years of professional experience in C++ 14/17/20 software development. Experience with multi-threading, performance optimization, and memory management. Proficiency in software design patterns and architecture. Experience with version control systems and continuous integration (e.g., GitlabCI/CD). Knowledge of Docker for containerization. Excellent problem‑solving skills and a proactive attitude. Good communication and team collaboration skills. Familiarity with image processing libraries. Understanding of security best practices and regulatory compliance (GDPR). Benefits and Extras Health & Wellbeing: Use your full access to the mental health platform Nilo, including 1‑on‑1 sessions. Personal and professional development: Make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption including certification. Remote work support: We provide support on equipment and offer flexible working hours. Collaboration and community: Regular onsite gatherings, internal initiatives and summer parties to connect outside of work. Leave benefits: Paid special leave days for family or other personal reasons. Workcation possibilities: Combine work with a longer stay at your holiday destination or extend a weekend. Location‑specific perks: Additional benefits that differ between our locations. IDnow applies the principles of non‑discrimination and equality: We strive to establish, maintain, and promote an open and inclusive recruitment process and working environment by respecting the principles of equal opportunities. Including but not limited to: sex, race or ethnic origin, religion or convictions, gender identity, citizenship, marital status, disability, age, or sexual orientation. #J-18808-Ljbffr