Python Backend Backend Developer (Mumbai)

Company: WillWare Technologies Role: Python Backend Developer Experience: 3+ Years Work Mode: Remote (Freelancing) Job Description: About the Role We are staffing a frontier AI data initiative that requires strong software engineers to build the infrastructure and training data used to develop and evaluate AI agents. Key Responsibilities: - The Engineer will, depending on assigned track: build Python backend applications that replicate existing SaaS tools (such as Slack, Linear, Jira, Notion, Gmail, and wikis), including implementing integrations and standing up full-service backend functionality; - Perform thorough backend testing and integration validation to ensure each connector behaves faithfully like the system it emulates; - Adapt and extend previously built connectors as needed, and test existing connectors internally before they are treated as complete; Build current connectors from scratch where required, within agreed delivery timeframes; - Conduct data mining and task mining to identify representative workflows suitable for long-horizon task development; Author realistic tasks derived from mined data and workflows; - Verify task and data quality, realism, and correctness through structured QA; Write clear evaluation rubrics that define correct, partially correct, and deficient work; - Use AI coding agents proficiently throughout all development, QA, and validation work; collaborate across the connectors and tasks tracks, - Participate in onboarding, calibration, and quality-review cycles; deliver assigned work to the expected quality bar and on agreed milestones. Must Have Required Skills: - Minimum 3+ years of overall experience - Strong proficiency in Python (FastAPI, Flask, or Django)with proven experience in backend software development. - Proficiency with Git, Docker, and basic software pipeline setup. - Experience building scalable backend applications, REST APIs, and microservices. - Proficiency in using AI coding assistants (e.g., Codex, Claud