
Soleene
Backend developer for Python Java and APIs
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Back-end Developer (Java, Python)
Self-Employed / Freelancer • Freiberufler
Jan 2021 - Present • 5 yrs 10 mos
Back-end development in Java (Spring Boot, microservices) and Python (FastAPI), with SQL/PostgreSQL, Docker and automated tests. What I build: - REST API endpoints, documented with Swagger/OpenAPI - Data scrapers and automations in Python - Integrations with Mercado Pago (Pix and card), WhatsApp Cloud API, Telegram, Notion API, Google Sheets and transactional e-mail - LLM integrations (Gemini API) with structured JSON output How I work: scope, price and deadline agreed before I start, a written update at each step, and a tested delivery with simple instructions.