Who we are
CryptoNext Security is a deeptech startup specializing in post-quantum cryptography. Our solutions help businesses and institutions prepare for a future where quantum computers will challenge traditional data security. We work with leading clients in finance, defense, and telecommunications.
On a daily basis, you will
Design and develop React-based user interfaces for our post quantum cryptography products.
Collaborate with Product and Backend teams to ensure a smooth and intuitive user experience.
Optimize performance and ensure cross-browser and cross-device compatibility.
Integrate REST APIs to interact with our backend services.
Participate in code reviews and apply best practices (unit testing, continuous integration, documentation).
Contribute to frontend architecture improvements by suggesting technological upgrades and refactorings.
Enable improvement of our products even if outside of your common scope
Embrace our frontend team work principles: “Done over perfect” / we ship/deliver fast: KISS, DRY (don’t repeat yourself), SOLID
The skills you'll need
Strong expertise in React / Next.js and its ecosystem (React Hooks, Context API).
Excellent knowledge of TypeScript and robust programming principles.
Experience with modern UI libraries (Tailwind, or chadcn/ui).
Experience integrating REST APIs
Good grasp of frontend performance optimization and related tools (Webpack, Vite, CoreWebVitals).
Experience with frontend testing frameworks (Jest, React Testing Library, Cypress).
Familiarity with Git, CI/CD pipelines, and DevOps for automated integration and deployment.
Bonus skills
gRPC.
Knowledge of secure coding practices and application security.
Basic understanding of cryptography and cybersecurity.
Experience in a startup or deeptech environment.
The team you'll be joining
You will be part of our R&D team, working closely with backend developers, the product team, and UX/UI designers. You will report to the and collaborate with other departments to build high-performance, user-friendly interfaces tailored to our clients’ needs.
Our recruitment process
Initial discussion with our HR team to explore your background and motivations.
Technical interview with a developer, including a coding test.
Meeting with a manager to ensure alignment with our company culture.
If successful, you’ll receive a final offer! 🚀
What’s in it for you at CryptoNext
A stimulating work environment with cutting-edge technological challenges.
A fast-growing startup with a team of passionate professionals.
Flexible remote work options and an office in Paris.
A competitive salary, aligned with our compensation philosophy.
A deep dive into the exciting world of post-quantum cryptography and cybersecurity.
Ready to join the adventure? 🚀 Apply now!
Apply on company website Paris, France Hybrid Full-time
CryptoNext Security is hiring a FullStack Developper
About company
Accompany your organization's transition to quantum-resistant cybersecurity with cryptographic agility from CryptoNext Security. The company specializes in post-quantum cryptography (PQC) solutions, helping organizations manage, orchestrate, and audit their data security in anticipation of quantum computing threats.
Backed by over 25 years of research, CryptoNext Security offers modular solutions for PQC evaluation, cryptographic inventory, remediation, and crypto-agile management. Their technology supports a structured migration strategy across various sectors including banking, defense, energy, aerospace, and public services.
Recognized as a top 5 PQC leader by ABI Research, Bain Capital Ventures, and IDC Innovators, the company enables organizations to test, discover, migrate, and manage cryptographic assets across applications, networks, and secure communication systems.