Company Overview At RESONIKS , we combine acoustics, AI, and purpose-built hardware to transform quality control in manufacturing. Our technology detects hidden structural defects in metal and composite components within seconds, faster, more cost-effective, and more reliable than traditional inspection methods. This enables manufacturers to move toward fully automated, zero-defect production.

We’re a fast-growing deep-tech startup operating across the Netherlands, Finland, and Germany, tackling complex challenges at the intersection of machine learning and industrial engineering. If you’re driven by real-world impact, cutting-edge technology, and the opportunity to shape the future of automated quality control, RESONIKS is the place for you .

The Role We are looking for a highly skilled, execution-oriented Senior Software Engineer to join our on-site engineering team. This role is designed for a dedicated individual contributor who loves solving complex technical challenges in a fast-paced startup environment. Rather than focusing on management or leadership, we need a "developer's developer"-someone with a profound understanding of software craftsmanship, high-performance systems, and robust engineering principles. You will be responsible for building the core of our deep-tech products, ensuring that every line of code is efficient and scalable.

Responsibilities

• Execute & Implement: Design and develop high-quality, scalable software solutions primarily using Python and Rust.
• System Optimisation: Build and maintain performance-critical systems with a focus on parallel processing and efficient resource management.
• Engineering Excellence: Apply rigorous software engineering principles (Clean Code, SOLID, Design Patterns) to ensure maintainability and stability.
• Troubleshoot: Deep-dive into complex bugs and performance bottlenecks to optimise system reliability.
• Collaborate: Work closely with the engineering team in an on-site startup setting to turn research and ideas into production-ready code.

Requirements And Qualifications

• 5+ years of hands-on experience in software development at a senior level.
• Core Mastery: Exceptional proficiency in Python and a deep understanding of its ecosystem.
• Software Fundamentals: A rock-solid foundation in data structures, algorithms, and system design. You should have a “gut feeling” for how software behaves under load.

Working at RESONIKS Join an early-stage, fast-moving team where your work shapes both the product and the company culture. You’ll tackle unique challenges and see your ideas come to life in a collaborative, supportive environment. At RESONIKS, you can:

• Be part of a creative, supportive environment where you can take ownership, share ideas, and collaborate with passionate colleagues.
• Collaborate across diverse teams and grow professionally and personally.
• Enjoy a challenging and meaningful role in a fast-growing, innovative company.
• Have opportunities for training, skill development, and career growth.
• Flexible working model with hybrid and onsite depending on role and business needs.
• A culture of inclusion - everyone is welcome, regardless of background, experience, or identity
• Regular team events, from spontaneous get-togethers to our legendary team retreats.
• Work at a dynamic, international company shaping the future of industrial AI and quality control.

About Us We are an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability, genetic information, or any other characteristic protected by law.