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:
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Real-time AI ISR module deployable on drones and tactical platforms
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Full-stack Counter-UAS (C-UAS) solution enabling autonomous drone takeover under GNSS-denied environments
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MLOps platform for training & deploying military-grade AI models
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Radar Intelligence platform for fusing and analyzing track data
Position Details-
Location: Paris, France (hybrid possible)
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Reports to: Head of Product
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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
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Tech stack: ReactJS, NodeJS, Kotlin, Python (web servers), Figma
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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
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Build scalable, maintainable web applications using modern frameworks
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Develop and maintain a coherent design system and reusable component library, in collaboration with our UI/UX designer
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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
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Handle diverse data patterns (real-time, batch, intermittent connectivity)
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Ensure resilience and usability in constrained or operational contexts
Performance & Reliability-
Optimize frontend performance and application responsiveness
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Ensure reliability in mission-critical environments
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Debug production issues across the stack when necessary
Full-Stack Contribution-
Integrate with backend APIs and data services
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Contribute to backend or middleware when needed (API design, data handling, debugging)
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Work across the stack to unblock progress in a small, fast-moving team
Testing & Quality-
Write unit, integration, and end-to-end tests
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Maintain high standards of code quality and documentation
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Participate in code reviews and continuous improvement
Requirements
Candidate Profile-
3–5 years of experience in software engineering, with strong frontend specialization
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Proven experience in SaaS or scale-up environments
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Strong expertise in modern frontend frameworks (React preferred)
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Solid understanding of design systems and UI architecture
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Comfortable working across the stack (APIs, backend basics, system integration)
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Product-oriented mindset with a bias for action
Nice to Have-
Experience with data-heavy or complex interfaces
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Familiarity with applications deployed outside standard cloud environments (on-prem, edge)
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Experience with TypeScript across the stack
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Exposure to DevOps or deployment pipelines
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Interest in deeptech, defense, or high-reliability systems
Skills & Values
Frontend Craftsmanship
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Strong attention to detail and UI quality
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Ability to build scalable, reusable components
Versatility
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Comfortable stepping outside strict role boundaries
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Able to contribute across the stack when needed
Product Ownership
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Focused on delivering user value, not just features
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Pragmatic and impact-driven
Execution & Autonomy
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Thrives in small, fast-moving teams
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Takes ownership and delivers end-to-end
Technological Sovereignty
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Motivation to work on strategic, high-impact technologies in Europe
