--- title: 'AI engineer at Symbiotic Security' canonical: 'https://feeny.ai/job/ai-engineer-symbiotic-security-morning-laffitte-83vvwh89s87n' type: 'job' last_seen: '2026-09-09' --- # AI engineer at Symbiotic Security - **Company:** Symbiotic Security - **Location:** Morning Laffitte - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-01-16 - **Last confirmed live:** 2026-09-09 - **Apply:** https://jobs.gem.com/symbiotic-security/am9icG9zdDqbK7uL_ZENalq-YitsxD6- ## Job description ## About Symbiotic Security Symbiotic Security is a cybersecurity startup helping developers write secure code through an AI-powered assistant integrated into their IDE and CI/CD pipelines. Our solution has two unique strengths: it provides developers with interactive training to understand vulnerabilities as they code, and it automatically detects and remediates security flaws introduced by generative AI tools such as GitHub Copilot. ➡️ Founded in April 2024 ➡️ 24 team members split between Paris (Tech team) and New York (Sales team) ➡️ Goal: 8 new hires by the end of 2026 ➡️ Morning Laffitte (Paris 9ᵗʰ) ## The role – Senior AI Engineer We are looking for a Senior AI Engineer to lead and accelerate our AI roadmap and turn cutting‑edge ideas into robust, production‑ready features inside our developer security platform. You will be a key member of a small AI team (~2–3 people) and work at the intersection of LLMs, developer experience, and application security, with a high level of autonomy and direct impact on the product and roadmap. ## What you will work on - Design and own AI features end‑to‑end that protect code generated by humans and by AI tools (Copilot, etc.), from ideation and prototyping to production and iteration. - Define and drive our data strategy for AI: dataset definition, synthetic data generation, labelling strategies, and quality control. - Build and improve evaluation and testing pipelines for our AI assistant so that we can systematically measure quality, regressions, and business impact. - Prototype fast and industrialise selectively: explore multiple ideas, select the most promising ones, and drive them into production with the engineering team. - Shape our AI architecture and tooling (prompting strategies, retrieval approaches, memory mechanisms, observability, evaluation frameworks). - Partner closely with Product, security researchers, and engineering leads to align AI initiatives with user needs and company priorities. - Mentor more junior engineers on AI topics and contribute to structuring our AI practice (best practices, documentation, standards). What success looks like in your first year 3 months - You have a deep understanding of our product, users, and AI stack (Bedrock, LangChain, internal tooling, experimentation environment). - You have delivered at least one PoC of an AI‑powered protection feature and significantly improved an existing AI component. - You are seen as a go‑to person on AI ideas and trade‑offs. 6 months - You have industrialised one or more PoCs end‑to‑end with the engineering team, from prototype to production. - You have set up or redesigned key evaluation pipelines and quality metrics for our AI assistant. - You are a core partner for Product and the CTO on AI roadmap decisions. 12 months - You are a reference point for AI topics in the company and drive complex, cross‑functional projects with high autonomy. - You have materially improved our time‑to‑market on AI protection ideas and our overall AI quality. - You actively mentor others, spread good practices, and help make Symbiotic a top‑tier place to do applied AI for security. Tech Stack & Environment - Backend: Python 3.12+ / Django (monolith, REST API) - Frontend: TypeScript / React (SPA) for the frontend of the SaaS platform - TypeScript for the IDE plugin - AI stack: AWS Bedrock, LangChain, LLM proxy, internal observability to monitor latency and quality of AI calls - Database: PostgreSQL - Architecture: Monolithic, Hexagonal architecture, DDD being introduced - Cloud: AWS - Tests: 94% backend coverage, 100% business logic covered - Tools: Sentry, logs, traces, internal analytics - Satellite services: CLI tools & AI agents written in Python ## Your future team You’ll work closely with: - Edouard (CTO) - Salah Eddine (AI engineer) - Abir & Minh Thang (Engineering Manager / Tech Lead) - Alexandre, Lucine, Koceila (fullstack software engineers) - Matthieu (SRE) and Anthony (cybersecurity researcher) - Alexis (Product Manager) and Quentin (Product Designer) We’re a multi‑disciplinary, product‑driven team, not working in silos. AI is considered a product engineering role, not a separate research lab. ## How we work Our methodology is a mix of Scrum and Shape Up: - 2‑week cycles, dailies and retros - Short briefs & kick‑offs - High availability of the EM/CTO for decisions - Strong expectation of ownership, even for junior profiles, with support and mentoring We value: - Curiosity (especially around AI and new tech) - Product thinking (understanding the “why”, not just executing the “how”) - Clear communication on blockers and progress - Comfort with ambiguity and evolving priorities ## What we’re looking for Core skills - Strong, hands‑on experience with LLMs in production: you have already built and shipped RAG systems or similar LLM applications with real users. - Solid software engineering background, ideally in Python, with the ability to own complex systems (architecture, performance, reliability). - Proven ability to design experiments, choose the right metrics, and iterate systematically. - Experience with modern AI tooling (e.g. Bedrock, LangChain or similar frameworks, evaluation stacks, observability for AI systems). - Comfortable working close to the product: clarifying use cases, challenging requirements, and balancing UX, performance, and cost. ## Nice to have - Experience with security, developer tools, or infrastructure / platform products. - Exposure to model fine‑tuning or non‑LLM ML (e.g. ranking, anomaly detection, embeddings, classical ML). - Experience designing or operating high‑leverage internal platforms (evaluation infra, experimentation frameworks, data pipelines). - Passionate, has worked with Small Language model, will help the engineering team to evolve. - Background in a mature AI environment - Strong scientific background (top engineering school or equivalent in maths / CS / applied physics). Soft skills & mindset - Strong ownership and leadership: you identify problems, propose solutions, and drive them to completion, often across teams. - Low‑ego, high‑standards attitude: you care about impact and quality more than about being right. - Ability to mentor and uplevel others, both on AI and engineering topics. - Comfortable working in an environment with high expectations, fast iteration, and evolving priorities. Why join Symbiotic as a Senior AI Engineer? - Huge leverage in a small AI team (~2–3 people) rather than being a specialist in a large, siloed AI organisation. - A very multi‑disciplinary role spanning product, engineering, and security instead of owning a tiny “feature vertical”. - A diverse technical environment (security, backend, AI, SRE, product) where you can have real breadth. - Ideal if you want more substance and scope than a hyper‑narrow expert role. - Opportunity to shape how we build a scalable cybersecurity SaaS powered by AI. - 🪴 Strong career and leadership opportunities by joining early and helping define our AI practice. - 🧑‍🔬 A strong product & engineering culture with high technical ambitions. - 🥂 A vibrant, inclusive culture with regular team events and offsites. - ☝🏽 Direct, visible impact on the product and on Symbiotic’s trajectory. ## Compensation & Benefits (Senior) 💰 BSPCE (equity) available 🏥 100% health insurance coverage 🍽️ Swile meal card 💻 €500 equipment budget 🚲 Allowance for sustainable commuting (cycling, carpooling, public transport, etc.) 🏖️ RTT + paid vacation 🏡 2 remote days per week 👭 Referral bonus: €2,000 Hiring process We respect your time and keep the process efficient: - Call with our Talent Acquisition – Blanche – 30 minutes - Meeting with our CTO – 45 minutes to 1 hour - Case study to be done at home (async work) - On‑site session with our AI / engineering team (code review and discussion) – ~1.5 hour - Culture fit – lunch with the team – 2 hours - Formal offer ## About Symbiotic Security ## Company Overview - **One-liner**: Symbiotic Security provides an AI code generation agent that embeds security enforcement directly into the development workflow to produce compliant, secure code. - **Entity Type**: Private (Seed stage) - **Headquarters**: New York, New York, United States - **Founded**: 2024 - **Founders**: Jérôme Robert (CEO) and Edouard Viot (CTO) ## Core Business - **Primary industry/industries**: Computer and Network Security, AI-assisted Software Development - **Target customers**: Engineering and security teams at organizations that care about data security, compliance, and developer productivity (B2B, Enterprise) - **Mission or purpose statement**: To make AI usage safe throughout the manufacturing of software, ensuring organizations can accelerate development while maintaining security standards. ## Products & Services - **Symbiotic Code**: An AI code generation agent that enforces security policies, verifies outputs, auto-remediates issues, and revalidates correctness before code is returned. It is model-agnostic, supporting 15+ models. - **AI Guardrails**: Allows companies to inject their security policies into their AI coding assistant so every suggestion meets their standards. - **In-IDE Detection & Auto-fix**: Surfaces issues instantly in the IDE, with context-aware fixes customized to the codebase. - **Just-In-Time Training**: Provides in-context, in-IDE training to help developers understand the "why" behind security fixes. - **PR & CI/CD Protection**: A VCS bot flags vulnerabilities in PRs, and CI/CD scans ensure every build stays secure. ## Market Standing - **Valuation/Market Cap**: Not publicly available - **Key Metric**: Total Funding of $13M raised across two Seed rounds. - **Notable Investors/Partners**: Lerer Hippeau, Alven (lead), Axeleo Capital, Factorial Capital. - **Growth Signals**: Claims a 93% reduction in AI-generated vulnerabilities. Workforce grew 71.4% year-over-year (19 employees as of latest data). Has active job postings for engineering roles in Paris. ## Competitive Advantages - **Model-Agnostic**: Unlike competitors tied to a single LLM, Symbiotic works across 15+ models, offering flexibility. - **Security-First Generation**: Security is embedded into the generation workflow itself, not as an afterthought, aiming to prevent vulnerabilities before they happen. - **Developer Education**: Unique focus on just-in-time training to upskill developers on security, making them more self-sufficient. - **Experienced Leadership**: Founders have deep cybersecurity expertise and a track record of successful exits (Lexsi, Alsid). ## Strategic Focus - **Expanding Language Support**: Currently focused on infrastructure-as-code (Terraform), with plans to expand to Python, JavaScript, and the rest of the application stack. - **Building a Remediation Model**: Using the high-quality dataset of bug-fix pairs generated from their platform to train a model for automatic remediation. - **Scaling the Team**: Actively hiring for senior engineering roles in Paris to grow their product and engineering capabilities. ## Why Work Here - **Mission-Driven**: Opportunity to work on a critical problem at the intersection of AI and security, ensuring safe and productive use of AI in software development. - **Strong Founding Team**: Work directly with experienced cybersecurity veterans who have a history of building and exiting successful companies. - **High Growth Stage**: With $13M in funding and a rapidly growing team (71.4% YoY), this is an early-stage opportunity with significant ownership and impact. - **Remote-Friendly**: The workforce is distributed across France, the United States, Canada, and Spain, suggesting a flexible work environment. - **Open Positions**: Currently hiring for "Software engineer Typescript" and "Senior Software engineer Python / TS" in Paris (CDI). ## Sources 1. [Symbiotic Security Website](https://www.symbioticsec.ai/) 2. [Symbiotic Security About Us](https://www.symbioticsec.ai/about-us) 3. [Symbiotic Security LinkedIn](https://www.linkedin.com/company/symbiotic-security) 4. [Symbiotic Security on Built In](https://builtin.com/company/symbiotic-security) 5. 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