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

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...

Front End Engineer - Team Product H/F