Senior FullStack Developer
We work with major players in finance, defense, and telecommunications , delivering cutting-edge, quantum-safe security solutions. On a daily basis, you will As a Full Stack Developer, you will contribute to the development of DISCOVERY , our next-generation observability and orchestration platform for post-quantum cryptography operations. You will work across the entire stack - backend services, data flows, and frontend interfaces - collaborating closely with product, backend, and infrastructure teams.
Feature Development & Architecture
- Design, develop, and maintain full-stack features for the DISCOVERY platform.
- Build modern, responsive React front-ends integrated with Node.js and Kafka backends.
- Participate in architectural decisions and propose technical improvements aligned with long-term product vision.
- Design and implement REST and event-driven APIs .
- Ensure performance, scalability, and resilience across distributed components.
- Collaborate with backend engineers on domain modeling, API contracts, and data flows.
- Implement advanced data visualization and monitoring features using the ELK stack (Elasticsearch, Logstash, Kibana).
- Integrate backend logs, metrics, and analytics into frontend dashboards.
- Participate in code reviews and uphold high engineering standards.
- Contribute to technical documentation and promote software craftsmanship.
- Apply KISS, DRY, SOLID, and pragmatic engineering principles ("done is better than perfect").
- Contribute to deployment workflows, CI/CD pipelines, and automation initiatives.
- Work with Docker/Kubernetes-based environments to ensure smooth delivery.
The skills you'll need
Must-have
- 10+ years of experience in software development, ideally in a software editor or deeptech environment.
- Master's degree from a French engineering school or European equivalent.
- Strong hands-on expertise in:
- Node.js
- React
- TypeScript
- Strong understanding of Docker , Kubernetes , and containerized deployments.
- Experience with message-driven architectures (Kafka or equivalent).
- Solid understanding of the ELK stack and its application in observability/analytics contexts.
- Comfortable with CI/CD , Git workflows, automated testing, and modern DevOps practices.
- Deep grasp of software design principles and maintainability.
- Fluent in English.
- Experience with gRPC or other microservice communication patterns.
- Secure coding practices and application security awareness.
- Experience with performance-critical or network-intensive systems.
- Background in cybersecurity or cryptographic systems.
- Experience with AWS, GCP, or Azure.
- Backend engineers
- Product managers
- Platform and infrastructure engineers
- The Head of Engineering
- Cryptography experts and system engineers across the company
- Introductory call with HR - background, motivations, expectations.
- Technical interview with an R&D engineer, including a practical coding exercise.
- Head of Engineering interview - system design, long-term fit, and cultural alignment.
- Offer & onboarding - welcome to CryptoNext!
What's in it for you at CryptoNext
- Join a fast-growing deeptech company at the cutting edge of quantum-safe cybersecurity.
- Work on challenging engineering problems using modern technologies.
- Build next-generation observability tools for cryptographic operations.
- Flexible remote policy + office in central Paris.
- Competitive compensation aligned with your seniority and expertise.
- Direct impact on the future of secure communications.
Emplois Recommandés
Stage - Chargé(e) de Projets Événementiels & Relations Écoles - F/H - Paris - Septembre 2025
Nous recherchons notre prochain(e) Chargé(e) de Projets Événementiels & Relations Écoles pour un stage de 6 mois, à Paris, dès juillet ouseptembre 2025. Ce que tu feras chez nous ? Tu intégreras l'é…
Lead / Senior Data Analytics Engineer 60/80K€ + BSPCE | Scale‑up française - H/F
L'ENTREPRISE : Scale-up Française spécialiste de l'image La mission de l'entreprise est de révolutionner et gerer l'ensemble du cycle de vie des images pour ses clients, en combinant photographie p…
Manipulateur en électroradiologie médicale H/F
Manipulateur en électroradiologie médicale H/F 23/234/CGH/1832 Nous recherchons des manipulateurs(trices) en CDI et CDD à temps plein. Vous rejoindrez une équipe dynamique de 6 radiothérapeutes/oncol…
Gestionnaire de Paie (H/F)
L'ENTREPRISE, CE QUI FAIT SA DIFFÉRENCE Notre entreprise partenaire s’illustre dans le secteur de la cordonnerie et des services rapide. Entreprise à taille humaine, elle valorise une culture d’en…
Nounou/Nanny F/H
Nombre de postes : 1 Métier : Nounou/Nanny F/H Contexte : Garde après l'école Missions : Apprentissage à des enfants, Garde d'enfants, Assurer la sécurité et le développement de l…
Business Manager Senior - ESN H/F
Description Notre client, une ESN dynamique et ambitieuse qui accompagne de grands comptes français et internationaux dans leurs projets de transformation IT et métier, recrute un(e) Busines…
Consultant.e SEO / GEO - Full Remote or Paris H/F
Rejoindre Ad’s up Consulting Dans un écosystème digital en constante mutation — où la data et l’ intelligence artificielle redéfinissent chaque jour les codes du marketing — Ad’s up Consulting…
Terrassier (75) (2)
Présentation de l'agence Ltd compte 9 agences spécialisées en recrutement et en travail temporaire organisées par pôle d'expertise en Ingénierie, Encadrement BTP et Tertiaire Haut de Gamme - F…