At CI\&T, we help major enterprises transform the potential of AI into real business impact through AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in agentic SDLC, application modernization, Data \& AI, martech, and business strategy. We are 8\.000 CI\&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day. **Important**: If you reside in the Metropolitan Region of Campinas, your presence at the city’s offices will be mandatory, per the current attendance policy. We are seeking a **Tech Lead / Javascript Developer (Vanilla)** to join our data product development team and work with a client in the **Entertainment** industry. **Your responsibilities will include:** * Designing sustainable architectural improvements * Refactoring monoliths into microservices and modularizing embedded frontends * Taking a systemic approach to understand impacts across backend, video platforms, devices, product, and user experience * Making architectural decisions * Serving as a technical reference for multiple squads * Documenting architectural decisions (ADRs) * Working with a metrics-driven, performance-oriented, and quality-focused culture. **Requirements for this role:** * **Availability for hybrid work, 2 days per week at the client's office (Rio de Janeiro/RJ);** * Strong experience with **Vanilla Javascript** * Deep proficiency in **plain Javascript** (without excessive reliance on frameworks) * Solid understanding of: event loop, garbage collection, memory leaks, and DOM manipulation in constrained environments * Knowledge of real hardware limitations: limited CPU, restricted memory, and legacy browsers * Experience with microservices architecture and distributed systems * Experience with synchronous and asynchronous communication * Experience with relational or non-relational databases * Experience with message brokers (Kafka, RabbitMQ, or similar) * Knowledge of idempotency * Knowledge of retry and backoff strategies * Knowledge of circuit breaker * Knowledge of observability (logs, metrics, tracing). **Nice-to-have qualifications:** * Experience with applications running on embedded browsers * Experience with HLS and/or MPEG\-DASH, DRM (Widevine, PlayReady, FairPlay), and integration with custom or native players * Experience with buffering handling, adaptive bitrate (ABR), playback error events, and player telemetry (QoE, QoS) * Experience with caching and performance optimization **Our benefits:** * Health and dental insurance * Meal and food allowance * Childcare assistance * Extended parental leave * Partnerships with gyms and health and wellness professionals via Wellhub (Gympass, TotalPass) * Profit and Results Sharing Program (PLR) * Life insurance * Continuous learning platform (CI\&T University) * Discount club * Free online platform dedicated to promoting physical health, mental well-being, and overall wellness * Pregnancy and responsible parenting course * Partnerships with online course platforms * Language learning platform * And many more More details about our benefits here: https://ciandt.com/br/pt\-br/carreiras At CI\&T, inclusion begins at first contact. If you are a person with a disability, it is important to **submit your medical report during the selection process.** *Check which information must be included in the report by clicking here.* This allows us to ensure the support and accommodations you deserve. **If you do not yet have a qualifying medical report, don’t worry: we can support you in obtaining one.** We have a dedicated Health and Wellness team, inclusion specialists, and affinity groups who will support you throughout every stage. Count on us to walk this journey alongside you.
João Silva
Indeed · HR
João Silva
Indeed · HR
