Fullstack AI Developer - Freelance H/F

Explicitly requires Vibe Coding and AI-assisted development to transform specs into components and build prompt/agent libraries.

About the Role

Freelance Fullstack AI Developer to accelerate a front-end rewrite and legacy modernization by applying AI-assisted development methods. The role focuses on migrating Angular v15 to v21, converting stored procedures to an ORM, building AI agents and prompts, and integrating AI-driven checks into CI/CD within an Agile-Scrum team.

Job Description

Role

Join a ~10-person Agile-Scrum team as a Fullstack AI Developer (freelance) to act as a productivity catalyst for an application modernization project. Your primary objective is to reduce the bottleneck of a large front-end rewrite by using next-generation AI-assisted development techniques and tooling.

Key Responsibilities

• Industrialize conversion of legacy screens and Angular v15 applications to Angular v21 using prompts and migration agents.
• Contribute to rewriting ~1,300 stored procedures into an ORM.
• Promote and coach the team in adopting Vibe Coding / BMAD to turn specifications into functional components via rapid AI-assisted iterations.
• Systematically generate unit and E2E test coverage using AI.
• Implement agents connected to the codebase to automate reviews, technical debt remediation, bug fixes, and eventually user story handling.
• Integrate AI-driven verification steps into CI/CD pipelines.
• Produce and document a library of prompts and agents to upskill the team.

Requirements

• 5–10 years of professional experience.
• Strong mastery of .NET Core and Angular (ability to validate and correct AI outputs).
• Advanced expertise in Vibe Coding and experience with augmented IDEs (e.g., Google Antigravity, Claude Code).
• Familiarity with state-of-the-art models such as Claude Sonnet and GPT Codex.
• Craftsmanship mindset: rigorous application of TDD and Single Responsibility principles.

Context

• Engagement type: Freelance.
• Development methodology: Agile-Scrum.
• Goal: significantly accelerate a front-end rewrite estimated at 300 days and modernize backend procedures via ORM migration.

Skills

Vibe Coding Prompt Engineering Test Driven Development Agile/Scrum Code Review CI/CD Legacy Migration Team Coaching Automation Unit Testing E2E Testing Technical Debt Remediation