Full stack Developer (AI Harness Codebase Hardening) - 4months + - Remote + some on site work in Germany - Start August

For our international client, we are currently looking for an experienced Full stack Developer (AI Harness Codebase Hardening).

Your main task is to support the client in the technical audit, hardening and cloud migration of an existing AI harness codebase.

The project focuses on the Back End optimization of Python-based FastAPI and Node.js services, the containerization and deployment of the application to AWS via Docker, the implementation of automated test suites and the Front End integration of Figma-based AI interface designs utilizing TypeScript, HTML and CSS.

Tasks:
* Full stack development

* Provision of hardened Back End source code, Dockerized AWS infrastructure deployments, automated test frameworks and responsive Figma-integrated Front End modules

* Technical Audit, Review, and Refactoring of the existing AI harness codebase (Python, JavaScript/TypeScript) to optimize maintainability, performance & code quality

* Development and Maintenance of FastAPI Back End services and Node.js integration layers

* Containerization of application components utilizing Docker configurations and multi-stage build scripts

* Migration and Deployment of the application architecture from local environments to the designated AWS cloud ecosystem

* Configuration of version control workflows and CI/CD pipeline integration components (eg, GitHub Actions, Azure DevOps) to facilitate automated deployment routines

* Design automated testing strategies

* Execution of code quality auditing, static analysis, linting, and formatting routines (eg, Ruff, Black, ESLint) to verify structural integrity

* Technical Interpretation and Implementation of Figma design tokens, component specifications, and handoff files into responsive Front End codebases using TypeScript, HTML and CSS
* Development of user interfaces for AI-driven features
* Creation of technical documentation detailing system architecture, API schemas, and maintenance workflows

Requirements:
* Strong project experience as Full stack developer

* Strong project experience with Front End codebases using TypeScript, HTML and CSS

* Cloud migration experience

* Project experience in AI Driven environments

* Project experience in AI Harness Codebase Hardening

* Experience with Python, JavaScript/TypeScript

* Project experience with Figma - preferred

* Experience with CI/CD pipeline integrations (eg, GitHub Actions, Azure DevOps)

* Experience in international project environments

* Strong communication skills
* Fluency in English

Project details:
* Start: ASAP, August
* Duration: 4 months (+ option to extend)
* Workload: 5 days per week
* Location: Mainly remote, first two months 1-2 days/week on site in Germany
* Languages: Fluency in English, German nice to have

Telephone interview slots with our client can be arranged at short notice with a decision immediately thereafter.