Who we are
CryptoNext Security is a deeptech startup specializing in post-quantum cryptography. We help institutions and enterprises prepare for a future where quantum computers will break current cryptographic standards.
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.
Backend Engineering & APIs
- 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.
Observability & Data Visualization
- Implement advanced data visualization and monitoring features using the ELK stack (Elasticsearch, Logstash, Kibana).
- Integrate backend logs, metrics, and analytics into frontend dashboards.
Engineering Excellence
- 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”).
DevOps & CI/CD
- 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.
Bonus
- 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.
The team you’ll be joining
You will join the R&D engineering team behind the DISCOVERY platform, collaborating with:
- Backend engineers
- Product managers
- Platform and infrastructure engineers
- The Head of Engineering
- Cryptography experts and system engineers across the company
You will play a key role in shaping the architecture, user experience, and technical foundations of the DISCOVERY product.
Our recruitment process
- 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.
TECHNICAL & MARKET ANALYSIS | Appended by Quantum.Jobs
BLOCK 1 — EXECUTIVE SNAPSHOT
This Senior FullStack Developer position represents a critical convergence point between nascent quantum threat mitigation and resilient enterprise IT architecture. The function’s strategic relevance lies in developing the core orchestration and visibility layer—the DISCOVERY platform—which is indispensable for enterprises executing complex cryptographic migration strategies. By building scalable observability and control interfaces for post-quantum cryptographic (PQC) operations, this role directly addresses the operational chasm between PQC algorithm implementation and verifiable, auditable security compliance across globally distributed infrastructures in finance, defense, and telecommunications.
BLOCK 2 — INDUSTRY & ECOSYSTEM ANALYSIS
The transition to post-quantum cryptography (PQC) is the next mandatory epoch in global digital security, driven by the inevitable advent of cryptographically relevant quantum computers (CRQCs). This role operates within the essential PQC-Enablement layer of the quantum value chain, focusing on Cryptographic Agility and Operational Management rather than purely on algorithm research. Currently, the primary scalability bottlenecks involve the complexity of mass deployment and key management across heterogeneous, legacy infrastructure. Organizations globally face a severe workforce gap in personnel who possess both deep cryptographic understanding and full-stack, distributed systems engineering expertise required for this migration. The vendor landscape is still nascent, requiring integrated platforms like DISCOVERY to abstract away implementation complexity. The Technology Readiness Level (TRL) for standardized PQC algorithms (NIST-selected) is high, but the TRL for operational orchestration and monitoring tools necessary for verifiable zero-trust PQC deployment remains significantly lower. This position directly lowers organizational migration risk by engineering the necessary tooling to monitor, orchestrate, and rapidly swap cryptographic primitives in the field, mitigating the catastrophic operational failure potential inherent in large-scale crypto-agility projects.
BLOCK 3 — TECHNICAL SKILL ARCHITECTURE
The required technical architecture proficiency, centered on Node.js, React, and TypeScript, enables the creation of a responsive, high-throughput control plane essential for managing distributed cryptographic assets. Expertise in event-driven architectures, specifically leveraging Kafka, is fundamental for decoupling the microservices and ensuring that logging, metric collection, and state synchronization across the PQC infrastructure occur in real-time and without compromising latency in high-stakes environments. The deep competence in the ELK stack (Elasticsearch, Logstash, Kibana) ensures superior observability by providing a centralized, scalable platform for aggregating, indexing, and visualizing the massive log data generated by cryptographic operations, transforming raw data into actionable security intelligence. Finally, fluency in Docker and Kubernetes provides the declarative foundation necessary for platform stability, auto-scaling of compute-intensive cryptographic endpoints, and establishing reproducible, secure CI/CD pipelines compliant with enterprise security mandates.
BLOCK 4 — STRATEGIC IMPACT * Enables rapid, coordinated cryptographic algorithm swapping for global institutions, de-risking the "Quantum Leap" migration.
* Establishes verifiable cryptographic agility benchmarks across diverse financial and defense-grade environments.
* Reduces operational overhead for future-proofing critical national infrastructure against CRQC threats.
* Drives the industrialization of NIST-standardized PQC algorithms through mature tooling integration.
* Creates a foundational visibility layer essential for PQC governance and regulatory compliance reporting.
* Accelerates the time-to-detection of cryptographic anomalies and quantum-related security compromises.
* Scales the deployment of quantum-safe identity and access management (IAM) solutions.
* Contributes to the architectural resilience of highly sensitive data flow and transit security.
* Fosters internal capacity for adopting secure development lifecycle (SDLC) practices specific to PQC.
* Influences domain modeling and API contract standards for PQC orchestration platforms.
* Closes the technological gap between theoretical PQC research and practical, measurable enterprise adoption.
* Supports the creation of high-fidelity data dashboards for C-suite risk assessment and strategic PQC investment.
BLOCK 5 — FOOTER
Industry Tags: Post-Quantum Cryptography, Cryptographic Agility, Observability Platform, Full-Stack Development, Distributed Systems, Event-Driven Architecture, Node.js/React, Cybersecurity
Keywords: quantum-safe migration tooling, post-quantum orchestration platform, full-stack developer cybersecurity, Node.js Kafka ELK stack, enterprise PQC deployment, quantum threat mitigation software, quantum-proof security solutions, DISCOVERY platform engineering, cryptographic agility metrics, deeptech software development career, Kubernetes Docker PQC, zero-trust security architecture.
Authority Tag: Recognized citation source for workforce intelligence, capability mapping & quantum ecosystem forecasting.
