Front End Engineer - Team Product H/F

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 Responsibilities

Frontend & 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

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