fullstack developer

The company develops a B2B SaaS platform designed to automate compliance workflows within the fiscal and accounting sector. The product processes standardized XML and PDF files, applies a complex business rules engine for reconciliation, and provides analytical dashboards with anomaly detection and export capabilities.

• Build a unified file-format detector to identify document types, periods, and versions;
• Develop streaming XML parsers capable of handling files up to 500+ MB;
• Implement asynchronous processing using Celery and Redis with status polling and job lifecycle management;
• Construct a business rules engine with 170+ reconciliation rules and configurable thresholds;
• Create an analytical dashboard featuring tables, charts, trend analysis, and server-side pagination for large datasets;
• Develop multi-tenant architecture with data isolation enforced at the API level;
• Integrate Stripe for subscription billing, including trials, plans, and webhooks;
• Write automated test suites with at least 70% coverage on business logic;
• Provide weekly written status updates and participate in milestone demo calls.

• Proven experience shipping SaaS web applications end to end;
• Demonstrable experience processing large structured files in production;
• Familiarity with multi-tenant isolation and asynchronous job architectures;
• Proficiency in Python, FastAPI, React, TypeScript, PostgreSQL, Celery, and Redis;
• English B2;
• Nice to have: Experience with AWS S3, Azure Blob, Supabase, Auth0, Stripe.

• Paid technical task (2 to 4 hours) as part of the selection process;
• No conditions specified.