Full-Stack Web Engineer

Job Summary
HyLight designs and operates
next-generation airships
for aerial inspections. Our aircraft collect LiDAR, imagery, and methane data to help utilities and infrastructure operators inspect their networks more efficiently and sustainably.

We are now looking for a
Full-Stack Web Engineer
to build the web applications that make our data usable. This role bridges our
client platform
(where customers access maps, 3D models, and reports) and our
internal tools
(live flight dashboards, QC/review interfaces, admin panels).

You will work across the stack: frontend ),
backend APIs
, and integrations with our data platform. Your work will directly shape both the customer experience and the daily workflows of our operations team.

Personal Note from Josef (CTO)
This role connects everything we build from our airships in the sky to the tools our clients and team use on the ground.

You'll craft the web platforms that make HyLight's
data come alive
: client portal, live dashboards, and internal tools. We're a small,
fast-moving team
, so your work will have a real
impact
from day one. If you love building clean, useful web products and want to shape the digital heart of HyLight, we'd love to have you on board.

Missions
Client Portal

• Develop a secure, modern web interface for clients to access LiDAR, imagery, and methane analytics.
• Integrate map viewers (2D & 3D) and reporting tools.

Flight Operations Tools

• Build internal dashboards to monitor live airship telemetry, mission status, and sensor feeds.
• Support mission planning and data upload workflows.

Internal Platforms

• Create QC/review interfaces for data validation.
• Develop admin tools to streamline operations and automate routine tasks.

Engineering

• Design and implement APIs and services to support frontend applications like Notion, Epsilon3, Onshape, Slack or github.
• Creat automations and implement IA tools
• Ensure security, scalability, and good development practices.
• Collaborate closely with the Head of Data Platform and other engineers.

Profile Sought
Education and experience :

• Bachelor/Master in Computer Science, Software Engineering, or equivalent practical experience.
• 2+ years of experience in web development (startup or product environment a plus).
• Track record of building user-facing web applications end-to-end.

Technical Skills

• Frontend: React / , TypeScript, TailwindCSS.
• Backend: (NestJS) or Python (FastAPI), REST/GraphQL APIs.
• Geospatial visualization: MapLibre GL, CesiumJS, or equivalent mapping libraries.
• Data viz: , D3, or similar.
• Authentication & security: OAuth2, SSO, RBAC.
• Bonus: Experience with WebSockets or real-time telemetry, mobile-friendly app design.

Soft Skills

• Builder mindset: comfortable delivering MVPs and iterating fast.
• Good product sense: understands both customer needs and internal workflows.
• Collaborative and pragmatic: works well with data engineers, ops, and designers.
• Excited by climate tech and the impact of aerial inspection.

Languages
French (professional working proficiency), English (fluent – internal communication and documentation)

What We Offer

• Annual compensation: €45,000 - €65,000 (based on experience)
• Real responsibility and direct impact on cutting-edge autonomous flight technology
• Mentorship with the Tech and Regulatory teams
• Potential to become a shareholder in HyLight
• 100% reimbursement of public transport pass (Navigo) or €800/year for sustainable commuting
• Bike provided for commuting
• Free lunch
• Bi-annual offsite trips with the whole team
• Excellent work environment: international team, team events, beautiful offices on a former airbase

Why You Should Join

• Founder Mentality: We value extreme ownership and want people who think like founders—fast decision makers, natural problem solvers, and executers.
• Ground Floor Opportunity: You'll be helping to shape and grow a revolutionary company with the resources to back it.
• Impact & Speed: Work in a fast-paced environment where your contributions will have immediate, tangible effects on the company's success.

Interview Process

• Introductory phone call min)
• Technical case study followed by a debrief with team member
• Reference calls
• On-site meeting with the team (3-4h)

Location:

• Office : Base 217, Brétigny-sur-Orge, accessible via RER C.
• Lab and Warehouse access
• You'll work side-by-side with experts in embedded, aerospace, and hydrogen propulsion systems—where your impact matters from day one.