Senior Software Engineer, Core

About GitGuardianGitGuardian is a global cybersecurity scale-up. The company is based in Paris, New York City, Boston.Our early investors include Scott Chacon, co-founder of GitHub, and Solomon Hykes, co-founder of Docker, alongside leading US and European VC firms. We raised our Series C in early 2026.GitGuardian leads the way in securing the credential layer, helping organizations protect the secrets that let code, machines, and AI agents access systems with broad detection, identity context, and remediation at scale. Already trusted by 600K+ developers worldwide and by 50 of the Fortune 500!About your team and your missionThe Core Squad is responsible for the logical layer that all other GitGuardian teams build on top of. When a customer deploys our platform across thousands of developers, our code is what determines whether everything scales: authentication, permissions, provisioning, notifications, APIs, billing. None of this can break, and everything needs to operate at scale.Our scopeIdentity: SSO/SAML, MFAProvisioning: SCIM, JITRBAC: Teams, roles, and access rightsOpening the platform: Public API, OAuth2, GitHub check runs, notifiers, and ticketing integrations (Slack, Jira, ServiceNow, Splunk, PagerDuty, MS Teams, webhooks)Product trust and observability: Audit and activity logs, data source health checks, in-app analyticsMonetization: Billing and modular plan architectureWhat you will work onComplete the platformization journey. Migrate our existing customers to the platform without disrupting any alerting channels. Concretely: ensure notifier parity, redesign the notification core to reconcile synchronous and asynchronous delivery, build Slack threading and DMs, and enable customizable email templates.Scale GitHub check runs. They block pull requests for most of our customers: GitHub API rate limits, database load spikes, dedicated Celery queues, and handling very large merge requests. Any incident here is immediately visible to customers.Redesign our plan architecture so Product and Sales teams can assemble offers and activate modules without requiring Engineering intervention.Open the platform externally: Build OAuth2, public APIs, and integrations with our customers’ ASPM ecosystems.Evolve a large Django monolith: dependency inversion, typing improvements, progressive decomposition. This is a real architecture challenge, not cosmetic refactoring.Rethink self-service onboarding, where a significant portion of new workspaces currently never reach their first value moment.Build and improve health check systems for our integrations.Your role day-to-dayYou will code every day and own the end-to-end delivery of projects: scoping with the PM and designer, technical design, implementation, deployment, monitoring. You own what you ship, including in production.Beyond your own delivery, you will help raise the engineering bar across

the team: reviewing your peers’ code, mentoring more junior engineers, driving quality standards, and contributing to technical decisions when designs impact our broader platform.

The team currently consists of 3 senior engineers (backend, frontend, full-stack), 1 engineering manager, 1 product manager, and 1 designer.About you5+ years of experience in web development, with strong proficiency in Django (or another Python web framework such as FastAPI or Flask)Here's what we consider essential for success in this role:If you think you match at least 70% of these criteria, please apply!Experience building web applications, task orchestration, distributed systems, and managing large data flowsThe ability to own a project or feature end-to-end: from scoping with Product and Design, to technical design, implementation, deployment, and monitoringA dynamic and proactive mindset, always willing to support and help teammatesStrong written and verbal communication skills in both English and French, with the ability to move from high-level discussions to deep technical divesStrong proficiency in AI-assisted development workflowsThe following skills would strengthen your application but aren't required:Significant experience working with a large monolithic codebase, along with knowledge of architecture best practices in this type of environmentAn interest in refactoring and building reliable systemsThe interview processAt GitGuardian, we are committed to building a diverse, equitable and inclusive workforce.We will ask for your gender identity on the application page to help us understand the diversity of our applicant pool and to track our progress in attracting and hiring a diverse workforce. The information is optional and will not be disclosed to the hiring manager or the interview team and will not be considered in the hiring process. We appreciate your willingness to share this with us so that we can continue to improve our diversity, equity and inclusion efforts.1. Video call with a Talent Acquisition team memberTo discover your professional project and evaluate if there could be a mutual match.2. Team interview / Interview with your future managerTo know more about yourself and your achievements, and present to you

the team.3. Technical interviewTo evaluate your skills for the position and project yourself into

the role.4.1 Final interview with an Executive ManagerTo detail our company’s vision and ambitions for the next couple of years.4.2 References checkYou can start thinking about two contacts who can attest to your previous or current professional experiences. These contacts should be as recent as possible, and we will call them at the end of the process.

Benefits💰 Package that includes stock-options🍜 Sponsored lunch vouchers (Swile)👟 Sponsored Wellpass (gymlib)🏥 Non-charged health insurance for children (Sidecare / Generali)💻 Up to €300 to improve your home office set-up🌴 Yearly holiday allowance🎡 Team building: monthly budget dedicated to each employee that you can spend as you wish, with colleagues (latest examples to date: Michelin star restaurant, karaoke, stand-up show, kitesurfing week-end, ...)And also...🏡 Remote policy: hybrid (3 days/week at the office in Paris)🤖 Full, company-wide access to cutting-edge AI tools to stay ahead of the curve📈 Opportunities for career development in the long term🤝 Referral

bonus of 4000€ for any new Guardian we might hire thanks to youMore about GitGuardian!StackBackend: Python (Django) Go, RustFrontend: JavaScript (React), TypeScript, React Query, JestDB: PostgreSQL, Elasticsearch (+ Kibana), MongoDBObservability: Elastic Stack, Sentry, Grafana LGTM, OTELDeployment: ArgoCD, GitlabCI, TerraformRuntime: Kubernetes (Karpenter, Istio)Cloud providers: AWS and OVHMessage brokering: RabbitMQ, RedisProductsUnderstand how GitGuardian works in this short video!Want to go even further? Check out our public roadmap!Check out the State of Secrets Sprawl Report to understand our mission and the industry.Our solutions are already used by hundreds of thousands of developers in all industries and GitGuardian platform is the n°1 app on the GitHub marketplace 🔥ClientsGitGuardian helps organizations find exposed sensitive information that could often lead to tens of millions of dollars in potential damage.More than 70% of our customers are in the United States.Many F500 companies use GitGuardian's platform.PeopleThe Guardians are knowledgeable, committed, serious, aligned with the company’s mission, and true team players: always willing to help each other grow our skill sets!

The team is diverse and we hail from more than 20 different countries.We are also agile, remote-friendly, and fun people to work with.You will get trust & autonomy on your perimeter with a very transparent internal communication and a strong impact on the company development.