Full-Stack Engineer (Identity & Security Engineer)

About the Partnership (via Servant Talent): Servant is a premier, internationally recognized human capital partner, full-stack recruitment innovator, and global workforce leader on an absolute mission to match high-caliber engineering specialists with market-disrupting software organizations. For this high-impact track, we have partnered with a forward-thinking technology enterprise purpose-built to help global teams work smarter, not harder. By combining deep architectural strategy, highly intuitive digital tools, and a people-first collective mindset, our client manufactures scalable workflow environments that maximize business efficiency, data clarity, and operational throughput. Built upon an uncompromised commitment to high-agency execution, curiosity, and continuous improvement, this growing organization empowers distributed developers with the ultimate technical canvas to solve real-world automation challenges safely across international borders.

Position Overview

We are seeking a highly sophisticated, security-minded Full-Stack Engineer (Identity & Security Specialist) to join our core global engineering division in a flexible, full-time remote contract capacity. In this high-leverage software engineering seat, you will claim individual accountability for designing, building, and maintaining the secure identity, access management (IAM), and verification foundations of our central Human-Led AI Orchestration Layer. Shifting completely away from boilerplate web implementations or uninsulated scripting habits, you will work at the deep intersection of full-stack product engineering, distributed backend development, and cloud-native security. Every element you deploy must be revenue-ready and enterprise-grade, ensuring that every singular Action Point™, automated AI choice, and multi-tenant pipeline remains flawlessly authorized, deeply auditable, and strictly aligned with explicit human intent.

Key Responsibilities

• Clerk Authentication Infrastructure Governance: Code, implement, and manage secure user authentication and identity verification pathways natively across frontend and backend lifecycles leveraging Clerk (or equivalent enterprise identity management tools).
• Python and FastAPI Backend Optimization: Architect, refactor, and extend robust server-side security logic and low-latency API routers natively utilizing Python frameworks and FastAPI services.
• Interactive Frontend Identity Curation: Integrate and troubleshoot secure single sign-on (SSO) loops, dynamic redirection components, and user session initializations natively inside React and TypeScript applications.
• Granular Role-Based Access Control (RBAC): Design and govern sophisticated RBAC permission structures and state models tailored precisely around human-led decision workflows and multi-tenant data barriers.
• AI Agent Permission Scope Hardening: Formulate capability-based permission boundaries and sandboxing methods for semi-autonomous AI agents, specifying what precise database tools they can access and preventing privilege escalation or cross-tenant data leakage.
• Web Threat Mitigations Implementation: Embed uncompromised platform security protocols across distributed APIs, enforcing strict compliance targets for OAuth2 tokens, secure JWT validation, CORS rules, CSRF protection, and rate limiting.
• Human-in-the-Loop Policy Gateways: Engineer and optimize strategic validation approval gates and policy enforcement nodes to safely regulate high-impact or sensitive agentic workflows.
• Pristine Security Architecture Documentation: Author extensive system architecture schemas, access blueprints, and technical threat-model profiles to facilitate zero-single-point-of-failure knowledge transfers across the engineering division.

Required Skills & Qualifications

• 5+ years of verified professional history running advanced full-stack software development, web application engineering, secure web programming, or cloud-native identity solutions delivery.
• Deep, authoritative technical command of cloud-based identity access configurations, highlighting a history building token lifecycles natively via Clerk, Auth0, or equivalent directory frameworks.
• Demonstrated experience constructing scalable backend services and secure token validation logic natively within FastAPI and Python environments.
• Hands-on operational history developing, testing, and scaling reactive interface architectures natively using **React** and TypeScript code bases.
• Profound, production-tested understanding of web security fundamentals, cryptographic validation rules, and threat-modeling frameworks (OAuth2, JWT, CORS, CSRF).
• Outstanding verbal and written communication mechanics in fluent English, showing an absolute capacity to coordinate smoothly across distributed, asynchronous software cells using Git.
• Location Context: Flexible contract parameters open exclusively to qualified full-stack security engineers based permanently within the United States, Brazil, Colombia, Mexico, Nigeria, or Ghana to execute 100% remotely from home.

Preferred Strategic Indicators (Nice to Have)

• Prior commercial history securing abstract decision-support platforms, complex business automation software, or highly regulated multi-tenant enterprise B2B SaaS frameworks.
• Practical exposure deploying cloud infrastructure components or setting up security groups natively inside Microsoft Azure environments or automated DevOps pipelines.
• Familiarity with Infrastructure-as-Code (IaC) configuration structures, notably **Terraform** or adjacent declarative deployment tools.
• A continuous personal passion for analyzing advanced machine learning advances and designing containment blast-radius strategies for autonomous workflows.

What We Offer

• Highly Adaptive Outcome-Driven Contract: Enjoy an elite, trust-based professional structure calling for 20 to 40 hours per week depending on active role scope and personal delivery targets—your compensation is tied strictly to value and outcomes, not arbitrary hours tracked.
• A competitive, highly stable fixed monthly stipend compensation structure tailored precisely to evaluate and reward your full-stack security authority and software velocity.
• The exceptional professional canvas to directly direct, code-shape, and deploy the identity boundaries safeguarding next-generation human-led artificial intelligence orchestration layers globally.
• Profound work-from-home remote parameters offering total lifestyle flexibility, uncompromised workflow autonomy, and zero office geographic friction.
• Immediate integration into an inclusive, high-accountability freelance ecosystem that strips away bureaucratic micro-management to foster individual ownership and real customer impact.