Front End Engineer - Team Product H/F
Skills
About the role
About Alta Ares
Alta Ares is a deeptech startup founded in 2024, building real-time AI for defense operations (ISR, C-UAS). Our primary clients are NATO-aligned militaries, with regular deployments during live exercises. Raised €2M pre-seed in May 2025. Products include:
Real-time AI ISR module deployable on drones and tactical platforms
Full-stack Counter-UAS (C-UAS) solution enabling autonomous drone takeover under GNSS-denied environments
MLOps platform for training & deploying military-grade AI models
Radar Intelligence platform for fusing and analyzing track data
Position Details
Location: Paris, France (hybrid possible)
Reports to: Head of Product
Position Objective: Build and scale user-facing applications across Alta Ares’ platforms, with a strong focus on front-end excellence and the ability to contribute across the stack when needed
Tech stack: ReactJS, NodeJS, Kotlin, Python (web servers), Figma
Contract: Full-time, permanent position (CDI)
Role & Mission
As a Front-End Engineer, you will own the development of high-quality interfaces across our software platforms (cloud, on-premise, and edge deployments) with a strong product-vision.
While your core strength is front-end engineering and design systems, you are comfortable contributing beyond the UI layer working with APIs, backend services, and system integrations when required. We are a small and agile company, requiring flexibility.
This role is ideal for engineers coming from SaaS or scale-up environments who combine frontend craftsmanship with product ownership and versatility.
Your ResponsibilitiesFrontend & Design Systems
Consolidate existing software products and lead cross-products code refactors when needed
Build scalable, maintainable web applications using modern frameworks
Develop and maintain a coherent design system and reusable component library, in collaboration with our UI/UX designer
Ensure high standards of UX, consistency, and visual quality across products
System Integration & Environments
Build applications that run across cloud, on-premise, and edge environments
Handle diverse data patterns (real-time, batch, intermittent connectivity)
Ensure resilience and usability in constrained or operational contexts
Performance & Reliability
Optimize frontend performance and application responsiveness
Ensure reliability in mission-critical environments
Debug production issues across the stack when necessary
Full-Stack Contribution
Integrate with backend APIs and data services
Contribute to backend or middleware when needed (API design, data handling, debugging)
Work across the stack to unblock progress in a small, fast-moving team
Testing & Quality
Write unit, integration, and end-to-end tests
Maintain high standards of code quality and documentation
Participate in code reviews and continuous improvement
Requirements
Candidate Profile
3–5 years of experience in software engineering, with strong frontend specialization
Proven experience in SaaS or scale-up environments
Strong expertise in modern frontend frameworks (React preferred)
Solid understanding of design systems and UI architecture
Comfortable working across the stack (APIs, backend basics, system integration)
Product-oriented mindset with a bias for action
Nice to Have
Experience with data-heavy or complex interfaces
Familiarity with applications deployed outside standard cloud environments (on-prem, edge)
Experience with TypeScript across the stack
Exposure to DevOps or deployment pipelines
Interest in deeptech, defense, or high-reliability systems
Skills & Values
Frontend Craftsmanship
Strong attention to detail and UI quality
Ability to build scalable, reusable components
Versatility
Comfortable stepping outside strict role boundaries
Able to contribute across the stack when needed
Product Ownership
Focused on delivering user value, not just features
Pragmatic and impact-driven
Execution & Autonomy
Thrives in small, fast-moving teams
Takes ownership and delivers end-to-end
Technological Sovereignty
Motivation to work on strategic, high-impact technologies in Europe
Questions about this role
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What's the typical salary for Frontend Engineer in France?
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