Guimaij
Full Stack AI Web Developer Django, OpenAI, AWS SaaS And APIs
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AI Integration Engineer — OpenAI Automation & Assistants
Upwork • Freelance
Jan 2026 - Jan 2026 • 0 mos
Implemented AI features that are practical and production-ready: chat assistants, knowledge-base Q&A, content generation tools, and internal automation bots. I connect OpenAI APIs to Django backends, build prompt templates, set up structured outputs, and add guardrails for safer responses. I improve reliability with logging, fallback flows, rate-limit handling, and cost control. When needed, I implement retrieval-based search (documents/FAQs) so the assistant answers using company data, not guesswork—making it useful for support, operations, and sales.
Fiverr
Freelance • 1 mo
Full-Stack AI SaaS Developer
Dec 2025 - Dec 2025 • 0 mos
Built and maintained SaaS web applications end-to-end with Python/Django, Django REST Framework, and AWS. I translate business workflows into clean modules (auth, roles/permissions, subscriptions, dashboards, notifications) and design reliable REST APIs for mobile/web clients. I integrate third-party services (payments, email/SMS, analytics) and implement background jobs for automation and reporting. I focus heavily on security, database performance, and clean code structure so the system remains stable as features grow and traffic increases.
Backend Engineer — ERP/CRM & Business Systems
Aug 2025 - Sep 2025 • 1 mo
Developed business systems like CRM, inventory, billing, and reporting tools that match real company processes. I design database schemas, implement approval flows, invoice generation, customer records, audit logs, and role-based access control. I improve performance by optimizing queries, indexing, caching, and refactoring slow endpoints. I also create admin tools for support teams to manage records safely. The result is a system that reduces manual work, improves data accuracy, and gives owners visibility through clear dashboards and export-ready reports.
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keith590

Frankrijk
Exceptional work from start to finish. Fast delivery, high-quality development, and excellent support throughout the project
clarice_hays
Terugkerende klant

Verenigde Staten
Very reliable and skilled. the final result was even better than expected
clarice_hays
Terugkerende klant

Verenigde Staten
Clean work, fast turnaround, and zero issues. Highly professional from start to finish
william456780
Terugkerende klant

Frankrijk
Really enjoyed working with the Guimaij team. Great communication, quick turnaround, and they truly put effort into every detail.
william456780
Terugkerende klant

Frankrijk
