Senior Product engineer

About Symbiotic SecuritySymbiotic Security is a cybersecurity startup helping developers write secure code through an AI-powered assistant integrated into their IDE and CI/CD pipelines.Our product does two things extremely well:Detect & fix vulnerabilities introduced by AI-generated code (GitHub Copilot, etc.)Train developers in context, as they code, so security becomes part of their daily flowFounded in April 2024, we’re currently 16 in Paris and 5 in New York.Our product team is small and collaborative: fullstack engineers, AI engineers, security experts and designers working closely together.The Role – Product Engineer, not just “Fullstack Dev”We’re looking for a Product Engineer (70% backend / 30% frontend) who cares as much about what we build as how we build it.You won’t just “take tickets”, you’ll be expected to: challenge product ideas, refine problem statements, and own features end-to-end, from design to production.You’ll work closely with:Edouard (CTO)Abir & Minh Thang (Engineer Manager/ Tech Lead)in a 3–4 dev team where every line of code has visible impact.Our Product Manager and Product designerWhat you’ll work onYou’ll spend most of your time on backend-heavy product work, with enough frontend to ship complete user experiences:🔐 Vulnerability RemediationDesign and evolve our engine that detects and fixes security issues in real-world codebases.🤖 AI Security (AI-generated code)Keep up with the fast-moving AI ecosystem and build protections against vulnerabilities introduced by AI coding tools.Support more IDEs, languages, and platforms (e.g. GitLab), and keep the architecture scalable as we grow.There’s a lot of new product work ahead, but also significant refactoring as we outgrow some of our initial designs. If you like cleaning up, simplifying architectures and preparing for scale, you’ll feel at home.How we workWe’re not dogmatic about process. Our methodology is a mix of Scrum and Shape Up:2-week cycles, dailies and retrosShort briefs & kick-offsHigh availability of the EM/CTO for decisionsStrong expectation of ownership from engineersWe value:Curiosity (especially around AI and new tech)Product thinking (challenge the “what”, not just execute the “how”)Clear communication on blockers or delaysComfort with ambiguity and fluid methodology (no heavy ceremonies or rigid Jira religion)What we’re looking forWe don’t expect you to tick every box, but you should recognize yourself in most of these:Core Skills✅ Strong experience in Python & Django (or similar web framework)✅ Comfortable with TypeScript / React for product UI work✅ Solid SQL knowledge (PostgreSQL is a plus)✅ You care about clean architecture, testing, performance & reliabilityYou think in terms of problems, not ticketsYou’re happy to do 70% backend / 30% frontend if it means owning a feature end-to-endYou enjoy talking through product trade-offs with design and engineeringYou’re not afraid of refactors when neededBonus PointsExperience with security, developer tools, or AIFamiliarity with DDD, domain modelling, hexagonal architectureInterest in AI-assisted development (Copilot, ChatGPT, Claude…)Experience with cloud & infra: AWS, Docker, TerraformBackend: Python 3.12+ / Django (REST API, monolith)Frontend: TypeScript / React (SPA)Infra: AWS / Docker / TerraformArchitecture: Hexagonal, DDD in progressTesting: ~94% backend coverageTooling: Sentry, internal analytics, CLI tools, AI agentsPackage📈 BSPCE (equity plan)Hiring Process (max ~2 weeks)1️⃣ Intro call – with Blanche (Talent Acquisition)2️⃣ Tech interview – with Abir (Engineering Manager)3️⃣ On-site technical session – with Minh Thang (pairing + design discussion)4️⃣ Culture fit & product conversation – with Edouard (CTO) + team lunch #J-18808-Ljbffr