[Hiring] Freelance Fullstack Developer @Evo.People

Role Description

For an innovative technology company in the field of cyber security and SecOps, we are currently looking for an experienced Fullstack Developer (f/m/d) with a strong security background on a freelance basis.

The company develops specialized platform solutions for the detection, analysis, and protection of complex IT infrastructures. As part of the ongoing development of an existing SecOps platform, a comprehensive and structured code review is now required. The focus is not on feature development, but on a deep technical and security-related assessment of an existing system architecture, particularly in the areas of:

• Authentication
• Authorization
• Multi-tenant logic
• Event-driven processing

This project offers the opportunity to work in a technically challenging environment using modern technologies, contributing to the quality assurance and security hardening of a critical platform.

Your tasks:

• Conduct a comprehensive code review (backend & frontend)
• Analyze the existing system architecture and design decisions
• Evaluate the security implementation (authentication, RBAC, tenant isolation)
• Identify security risks (e.g. auth bypasses, injection vulnerabilities, logic flaws)
• Review event-driven components (Redis Streams, Consumer Groups)
• Analyze scheduler implementations (e.g. APScheduler)
• Create a structured and well-documented review report
• Derive concrete recommendations for improvement

Qualifications

• Several years of experience as a Fullstack Developer with a strong backend and security focus
• Strong expertise in Python (3.10+) and FastAPI
• Experience with MongoDB (aggregation pipelines, indexing, multi-tenant concepts)
• Very good knowledge of Redis (especially Streams and Consumer Groups)
• Solid experience with Async Python (asyncio, httpx, motor)
• Experience with job scheduling (e.g. APScheduler or similar)
• Strong knowledge of React (18/19), Hooks, Context API, and React Router v6
• Experience with Tailwind CSS (including dark mode)
• Understanding of modern frontend authentication patterns (httpOnly cookies, CSRF)
• Proven experience in security topics:
• JWT-based authentication
• RBAC models
• Multi-tenant SaaS architectures
• Ability to identify and assess security vulnerabilities in code
• Basic infrastructure knowledge:
• Linux / systemd
• Nginx (reverse proxy, TLS)
• Docker (Compose, network isolation)
• Independent, structured, and analytical working style
• Excellent English skills

Requirements

• Experience with WebSockets and real-time architectures (nice to have)
• Experience with security-focused code reviews (beyond code style, focusing on logic and architecture) (nice to have)
• Experience in SecOps or cyber security environments (nice to have)

Benefits

• Start: Asap
• Duration: approx. 3 months
• Location: full remote
• Project language: English
• Workload: preferably 100% (part-time possible, resulting in longer duration)
• Rate starting from EUR 90.00 per hour, depending on qualifications and experience
• Open to market-aligned overpayment depending on expertise and project requirements