Job Summary: We are seeking an AI Solutions Specialist with a focus on Backend Development to optimize processes and automate tasks using artificial intelligence. Key Highlights: 1. Develop and maintain backend applications that utilize LLM APIs 2. Build RAG systems for intelligent document processing 3. Collaborate on the architecture of scalable, high-performance systems We are looking for an **AI Solutions Specialist** with a strong foundation in Backend Development to join our innovation team. Your mission will be to develop and maintain internal solutions focused on optimizing processes and intelligently automating daily operations. You will work on building APIs and integrations that connect our workflows to the leading AI innovations in the market. **Responsibilities and Duties** **Your day-to-day will include:** * **Develop and maintain** PHP-based backend applications that utilize LLM APIs * **Implement integrations** with AI models (OpenAI, Anthropic, Google, etc.) * **Build RAG (Retrieval\-Augmented Generation)** systems for intelligent document processing * **Work with vector embeddings** for semantic search and similarity matching * **Develop robust REST APIs**, adhering to SOLID principles and Design Patterns * **Optimize SQL queries** and data modeling for AI applications * **Implement solutions** using Docker for containerization and deployment * **Collaborate** on the architecture of scalable, high-performance systems * **Apply best practices** in development and clean code standards **Requirements and Qualifications** **To excel in this role, you’ll need:** * **Solid experience** in software development and frameworks (e.g., PHP, Node.js, Python) * **Experience** with LLM APIs (OpenAI GPT, Claude, Gemini, etc.) * **Familiarity** with Git and Agile methodologies * **Advanced knowledge** of SQL and relational databases (MySQL, PostgreSQL) * **Product/Process mindset**, capable of analyzing manual tasks and designing how AI can automate them * **Practical understanding** of vector embeddings and RAG techniques * **Knowledge** of generative AI tools and natural language processing * **Experience** in developing REST APIs **Bonus points if you also have:** * **Experience** with AI frameworks (LangChain, LlamaIndex) * **Knowledge** of vector databases (Pinecone, Weaviate, Qdrant) * **Experience** with document processing (OCR, PDF parsing) * **Knowledge** of model fine\-tuning * **Experience** with TensorFlow or PyTorch * **Understanding** of MLOps and model deployment * **Proficiency** in Docker for application containerization **Additional Information** **What we offer:** Health insurance; Dental insurance; Meal allowance or food allowance; Childcare assistance; Transportation allowance; Profit-sharing program (PPR); Birthday day off; Life insurance; Wellhub; Férias\&Co (travel benefit); 6-month maternity leave and 20-day paternity leave; Flexible working hours, 40-hour workweek; \#Secuida \- Our Quality of Life Program; Partnerships with various establishments and institutions in education, health, leisure, entertainment, and more. Complimentary LWSA products. **For those working onsite:** Fresh seasonal fruits every day; Coffee and cappuccino machines; Relaxation spaces including game rooms, video game areas, TV lounge, snack bar, barbecue area, study room, and mini-library. Parking. **Where we are:** **We’re located in three amazing places** Rua Alcides Lajes Magalhães, 130 \- Jardim Acapulco \- Marília/SP \| CEP: 17525\-181 Rua Alcides Lajes Magalhães, 140 \- Jardim Acapulco \- Marília/SP \| CEP: 17525\-181 Rua José Joaquim de Oliveira, 305 \- Jardim Acapulco \- Marília/SP \| CEP: 17525\-170 **Important note:** This and all open positions at LWSA are open to everyone, regardless of gender, ethnicity, sexual orientation, disability, and/or socioeconomic status. We emphasize that our job openings are open to people with disabilities (PwDs). Did you know LWSA is a digital solutions ecosystem composed of multiple companies? Yes — and all of them share one common goal: **transforming businesses so they can grow and thrive through technology**. Our team is recognized for its **passion, creativity, persistence, and collaboration**. Just like the people building their careers here, each of our brands has its own unique identity, yet they all share the same drive to evolve and consistently deliver excellence. **LWSA has a place that could be perfect for you!** Here, you can build your career in an environment of **autonomy, respect, and diversity**, within a company committed to developing its professionals to continue innovating and creating tomorrow’s solutions. So, are you ready to join this ecosystem and discover all the possibilities we have for your career? If you feel you’re a great match for our profile and would like to share your resume, that’s the first step toward joining our team!