[Job - 29349] Senior Data Developer (AWS), Brazil

CI&T is expanding its data development capabilities to support a greenfield platform initiative for a leading client in the agribusiness industry. This new product is being built from the ground up to deliver AI-powered agronomic analysis with georeferenced map visualizations — and the quality of its data foundation will determine everything that follows.

This role sits at the core of that foundation. As a Senior Data Developer, you will work alongside the client's technical leadership to architect and build the data ecosystem that will power intelligent agronomic insights. Your work will directly enable AI applications and geospatial visualizations to function on reliable, well-structured data — making this position both technically demanding and strategically critical. If you thrive in ambiguous, high-ownership environments where you shape the data architecture rather than inherit it, this is your role.

Responsibilities

• Design and build end-to-end data pipelines across the RAW, Silver, and Gold layers of the Medallion Architecture, ensuring reliability, performance, and maintainability at each stage

• Architect data ingestion, transformation, standardization, and serving processes, structuring data flows from diverse and heterogeneous sources into a coherent analytical foundation

• Model data for analytical consumption following Data Warehouse best practices, including Star Schema design and dimensional modeling suited for business intelligence and AI-readiness

• Identify, evaluate, and consolidate new data sources relevant to agronomic business objectives, proactively engaging stakeholders to understand, obtain, and validate data availability and quality

• Interact with business stakeholders and client leadership to translate domain requirements into data architecture decisions, challenging assumptions and proposing solutions grounded in technical evidence

• Manipulate, optimize, and serve data in multiple formats — including Parquet, CSV, and geospatial datasets — tailored to the consumption needs of downstream AI applications and map-based visualizations

• Manage and configure cloud infrastructure end-to-end, including storage, compute, access control, serverless functions, data cataloging, and event-driven processing on AWS

• Own deployment and CI/CD practices for data pipelines — including repository management, branching strategy, test gates, and automated deploy workflows via GitLab

• Support the creation of the data layer that will feed AI/ML applications, ensuring data quality, structure, and availability meet the requirements of machine learning workflows — without directly developing the models themselves

• Operate as a proactive technical partner in a greenfield environment: question, propose, experiment, and iterate with the team rather than execute in isolation

Requirements

• English proficiency at B2 level or above — ability to explain technical flows, engage in discussions, ask clarifying questions, and collaborate effectively with international stakeholders (accent is not a barrier; communication clarity is)

• Solid hands-on experience with AWS, covering the full infrastructure spectrum: S3, IAM (permissions and security configuration), Redshift, Lambda (serverless use cases), and Glue (including Glue Catalog for metadata management); ability to evaluate trade-offs between services for different pipeline scenarios

• Experience with Terraform or equivalent Infrastructure-as-Code (IaC) tooling, applied recurrently in real data engineering projects — not just theoretical knowledge

• Proficiency with GitLab for source control, CI/CD pipeline configuration, deployment workflows, and test gate management — specifically GitLab, not just generic Git experience

• Strong proficiency in SQL, including complex query writing, analytical transformations, and performance tuning for data warehouse environments

• Strong proficiency in PySpark, applied to large-scale distributed data processing — including partitioning strategies (e.g., by day/month/year), volume handling (tens to hundreds of GB), and performance optimization

• Experience with Databricks, used in the context of data engineering pipelines and lakehouse architectures, including migration and deployment scenarios

• Analytical data modeling expertise, with solid knowledge of Star Schema and dimensional modeling applied to data warehousing and business intelligence environments

• Hands-on experience with the Medallion Architecture (RAW / Silver / Gold layers), including manipulation and optimization of Parquet and CSV files

• Experience integrating and consolidating data from multiple heterogeneous sources, ensuring consistency, traceability, and analytical readiness

• Mindset suited for greenfield projects: proactive, solution-oriented, comfortable with ambiguity, and able to contribute to architectural decisions — not just execute predefined tasks

Nice to Have

• Familiarity with SnapLogic or equivalent low-code/no-code ETL orchestration platforms (e.g., Pentaho, Airflow, Alteryx) — SnapLogic is the current standard at the client, with migration underway; hands-on experience with block/flow-based ETL logic is a differentiator

• Experience with geospatial data processing and analytical environments focused on map-based and geographic visualization

• Knowledge of DuckDB for in-process analytical queries

• Background in data projects applied to agribusiness or precision agriculture

• Exposure to predictive modeling workflows (e.g., gradient boosting, ensemble methods, or similar) — as a data provider to ML pipelines, not as a model developer

#LI-JP3

Our benefits: -Health and dental insurance-Meal and food allowance-Childcare assistance-Extended paternity leave-Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass;-Profit Sharing and Results Participation (PLR);-Life insurance-Continuous learning platform (CI&T University);-Discount club-Free online platform dedicated to physical, mental, and overall well-being-Pregnancy and responsible parenting course-Partnerships with online learning platforms-Language learning platformAnd many more! More details about our benefits here: https://ciandt.com/br/pt-br/carreiras At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.