Full-Stack Developer (CIAM Specialist)

We are looking for an experienced Full-Stack Developer with deep expertise in Customer Identity and Access Management (CIAM) to join our customer team in Espoo. This is a critical 12-month role focused on the design, implementation, and roll-out of a secure, scalable identity solution alongside its associated front-end and back-end services.

The ideal consultant balances high-level identity architecture knowledge with hands-on proficiency in React/TypeScript and AWS Serverless environments.

Key Responsibilities

• CIAM Implementation: Design and develop capabilities using Auth0 (including Actions, Rules, Universal Login, and IDP integrations).
• Front-End Development: Build modern, responsive UI applications using React and TypeScript.
• Backend Services: Develop robust services using Node.js/TypeScript on AWS (Lambda, DynamoDB, API Gateway).
• Security Integration: Implement and manage secure authentication and authorization flows (OAuth2/OIDC, PKCE, SSO, JWT validation).
• Collaboration: Work closely with architects and product owners at our Keilaniemi office to ensure alignment with security and coding standards.
• Documentation: Produce technical documentation and lead handover activities to ensure long-term sustainability.

Required Skills & Experience

• Identity Protocols: Strong understanding of OAuth2, OIDC, SAML 2.0, JWT, and SSO.
• Frontend Expert: Expert-level proficiency in React and TypeScript.
• Backend/Cloud: Strong experience with Node.js and AWS Serverless (Lambda, DynamoDB, API Gateway).
• Infrastructure: Experience with IaC tools such as CDK and/or Terraform.
• Track Record: Proven experience in at least one major CIAM project within a large-scale production environment.

Preferred Qualifications

• Hands-on experience specifically with Auth0.
• Experience working within enterprise or regulated environments.
• Deep knowledge of secure design principles.
• Proficiency in using AI productivity tools (e.g., Claude Code, GitHub Copilot).

Soft Skills & Work Setup

• Proactive Mindset: You are security-minded and able to work independently while maintaining high standards.
• Communicator: Strong collaboration skills are essential for our team-centric environment.
• On-site Presence: While customer offesr a hybrid model, initial onboarding and regular collaboration require presence at our customer Keilaniemi (Espoo) office.

Details:

• Location: Espoo (Keilaniemi), Finland
• Duration: 12-Month Assignment
• Start Date: ASAP
• Work Model: Hybrid (Targeting 3 days on-site / 2 days remote)

More information -> juho_witted // juho.sopanen@witted.com