Job Summary: We are seeking a Full Stack Developer to work on data platform projects, developing robust and scalable applications with a focus on Machine Learning and AI. Key Highlights: 1. Technical leadership, architecture and design of scalable systems and bots. 2. Development of robust applications for operationalizing ML and AI. 3. Collaboration within cross-functional teams and problem solving. **BOARD** OPERATIONS IOTBDCO **Work Location:** Barueri \- SP We are a company specialized in digital transformation, unifying capabilities in Internet of Things, Big Data, Artificial Intelligence, and Blockchain through an integrated value proposition. Our solutions enable data-driven decision making; our goal is to deliver operational efficiencies and identify new revenue streams for our clients’ businesses. Join our team at Telefónica Tech – IoT and Big Data Business Unit, where we believe in the potential of our people and in growing together! We are looking for a Full Stack Developer to work on our data platform projects. You will be responsible for developing robust and scalable applications, contributing to building a data platform that enables operationalization of Machine Learning and Artificial Intelligence models. This role requires a technically strong professional who enjoys solving problems and collaborating with cross-functional teams to deliver products. **Responsibilities and Duties** * **Technical Leadership:** Guide the team (3–10 developers), conduct pair programming/mentoring, plan the technical roadmap, and lead code reviews. * **Architecture \& Design:** Define and document scalable architectures (12\-factor, event\-driven), integration patterns, and API contracts. * **Bots \& Channels:** Design and implement bots using the **Bot Framework SDK (****Node.js/TypeScript** **or C\# .NET)**, **Azure Bot Service**, and channels (WebChat/Direct Line, **Teams**, **WhatsApp** via Twilio/Infobip, RCS, app/web). * **Quality \& Observability:** Establish testing practices (unit/integration/e2e conversational), **telemetry (App Insights/OpenTelemetry)**, logging, and tracing with cost correlation. * **DevEx \& CI/CD:** Standardize pipelines (GitHub Actions/Azure DevOps), versioning, feature flags, canary/blue\-green deployments, and safe rollback. **Requirements and Qualifications** * Solid Software Engineering knowledge. * Experience as a technical reference/lead. * Proficiency in **Node.js/TypeScript** **or** **C\# .NET**. * Strong experience with **Microsoft Bot Framework v4** (SDK, **Composer**), **Azure Bot Service**, and **Bot Framework Emulator**. * Implementation of **Adaptive Dialogs**, **middleware**, **state management** (Conversation/User/Private), **OAuthPrompt**, proactive messages, and **conversation references**. * REST/GraphQL APIs, webhooks, and messaging (Service Bus/Queues). * **Containers** (**Docker**, **Kubernetes**/AKS), observability, and production troubleshooting. * Databases (Cosmos DB/SQL), **caching** (Redis), and queues. * Engineering practices: TDD/BDD, SOLID, clean architecture, design patterns. Preferred Qualifications * LLMs/SLMs (Azure OpenAI, Prompt Engineering, **RAG**, **vector DBs** such as Redis/pgvector), **LangChain/LangGraph**. * Integrations with **CCaaS/CRM** (NICE, Salesforce, ServiceNow) and channel providers (Twilio/Infobip). * **OpenTelemetry**, dashboards (Grafana/Kibana/Power BI), and automated conversational testing. * Experience with **APIM/Gateway**, **Terraform**, and **OPA policies**. **Additional Information** At Telefónica Tech, we spare no effort in supporting and valuing our employees! Here’s what we offer\* you: * Meal voucher (VR), food voucher (VA), medical and dental assistance, life insurance; * An exclusive Vivo offer, with special discounts on landline, broadband, TV, and apps; * Eligibility for annual bonus or PPR; * Plan your future with our private pension plan; * Have children? You’ll receive a subsidy to help cover school, daycare, or nanny expenses; * Work in an environment that respects your personality, your style of dress, and your individuality — be authentically you. \#VemdeVocê * Remote work up to two days per week. \#Mobility * Flexible working hours; * Enjoy a day off (Day off) to celebrate your birthday; * Participate in one of the largest corporate volunteer programs to transform the world; * Benefit from our Educational Development Program offering partnerships with educational institutions at discounted rates; certifications and online courses. * Accelerate your career through our Internal Recruitment Program, both in Brazil and abroad — after all, we operate in over 17 countries! \#MinhaCarreira * And much more! But you’ll need to apply to find out... * Subject to the company’s eligibility policy. All our job openings are open to persons with disabilities and/or rehabilitated individuals. We foster a culture that values diversity, differences, and people’s potential! We are Telefónica Tech, the global Cloud, IoT, and Big Data services provider of the Telefónica Group — now not only a telecommunications leader but also a technology market leader. Our purpose is to **Digitalize to Bring Closer** people, businesses, and society as a whole, building a more connected nation and transforming the lives of Brazilians. We aim to expand autonomy, personalization, and real-time choices for our customers, placing them in control of their digital lives — securely, reliably, and with the quality only the Telefónica Group can deliver. To make this possible, we rely on a highly certified and specialized team that grows every day! We lead the digital transformation process and connect with the most innovative and collaborative ways of working. We believe the path to delivering the best customer experience begins with an excellent employee experience. We believe diversity — in people, experiences, cultures, behaviors, skills, and attitudes — is a differentiator reflecting the society in which we live. We run an internal program grounded in five pillars: Gender, LGBTQIAP\+, Race, Persons with Disabilities (PcD), and 50\+ — ensuring a more inclusive culture and a more diverse, representative workplace. We are a technology company inspired by diversity and innovation, offering space for everyone, supporting and embracing differences. \#VempraTTech