Freelance Senior Software Engineer Django

Context As demand accelerates on Symbiotic Code, we are opening a contracting mission to strengthen the engineering team on high-impact deliverables, with a focus on speed, quality, and strong autonomy. The role As a Contractor Software Engineer , you will join the team to take ownership of well-scoped engineering topics, deliver iteratively, and integrate into our existing development flow (PRs, reviews, quality gates, deployments). Must-have expectations Strong autonomy on a Django (Python) stack (no planned upskilling on these fundamental) Testing discipline (useful tests, reproducibility) and systems thinking (performance / reliability / security impact) Mission-first mindset : willingness to “cross the aisle” and contribute where the mission needs it Ability to operate in a demanding environment (quality, security, ownership) Responsibilities Own a topic end-to-end (technical scoping, implementation, tests, documentation, delivery) Participate in the team’s development cycle: PRs, code reviews, feedback loops, iterations Maintain production-grade quality (robustness, security, readability) Communicate clearly on progress, risks, and trade-offs Project section (examples of contractor-friendly topics) These are examples (non-exhaustive) and may evolve: Database split to enable a future single-tenant deployment (migration / progressive separation) GitLab integration (existing spec) Prompt management migration (from client to backend) Security backlog (bug bounty-related issues) Contractors are expected to be fully part of the team’s development flow (reviews like everyone else). Core vision / research topics will typically be handled by full-time engineers. Engagement details Target daily rate (TJM) / budget : €600 / day Contract : 3 months , renewable Equipment & compliance : use of a Symbiotic Security laptop (Vanta) + a Symbiotic Security Gmail account Location : Morning Laffite - 3 days in the office / 2 remote days Renewal : based on project progress and evolving needs Process (contractor flow) A faster process than full-time hiring: Needs qualification (stack / budget) Remote technical assessment including: Algorithm & logic Architecture : asynchronous systems, scalability, project structure and delivery Nice to have Python / Bun Security mindset / AppSec sensitivity (or interest in leveling up in a security-focused context) How to apply / next steps Please share: Your CV or LinkedIn Links to code (GitHub, PRs) when possible Your daily rate , start availability, and preferred rhythm (days/week)