Hybrid Tech Lead – .NET/AWS

at CI&T

• Job title: Tech Lead – .NET/AWS
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: No Education Requirement
• Tech skills: ASP.NET, AWS, EC2, Grafana, Kafka, NoSQL, RabbitMQ, Splunk, SQL, Terraform, .NET
• Location requirements: Hybrid, Brazil

About the role

• Tech Lead managing .NET/AWS ecosystem for a financial project. Aiming for efficiency, quality, and innovation.

Responsibilities

• Lead technical and architectural decisions in .NET/.NET Core (C#), with emphasis on high-performance, resilient, and scalable REST APIs.
• Support and unblock the team as a technical reference: mentoring, pair programming, code reviews, and dissemination of best practices (SOLID, DDD, dependency injection).
• Define engineering, quality, and security standards: unit testing (xUnit/nUnit/MSTest), coverage, design reviews, versioning patterns, and Git workflows.
• Orchestrate and evolve CI/CD pipelines and quality gates (e.g., Sonar), promoting reliable continuous delivery.
• Drive end-to-end observability: instrumentation of logs, metrics, and traces; creation of dashboards and alerts (Splunk, Grafana, CloudWatch); and incident management.
• Design, provision, and operate workloads on AWS: S3, EC2, ECS (Fargate), Lambda, NLB, and infrastructure as code with Terraform.
• Collaborate with Product, UX, and QA to prioritize, evaluate trade-offs, and design user-centered, business-impacting solutions.
• Integrate and evolve existing systems, identifying opportunities for optimization and innovation, including in legacy environments (e.g., older SQL Server versions such as 2008).
• Promote agile practices (Scrum/Kanban) and a continuous learning environment, mentoring junior and mid-level developers.
• Act as guardian of architecture, quality, and observability.
• Support the team in technical decision-making and in rolling out solutions.
• Ensure applications meet client needs regarding performance, security, reliability, and cost-effectiveness.

Requirements

• Strong experience with .NET and .NET Core (C# and ASP.NET Core) building and scaling APIs.
• Solid understanding of SOLID principles, DDD, and dependency injection.
• Automated testing: experience with unit testing frameworks (xUnit/nUnit/MSTest) and quality best practices.
• Hands-on AWS experience: S3, EC2, ECS (Fargate), NLB, and Lambda; knowledge of networking, IAM, and monitoring (CloudWatch).
• Infrastructure as code with Terraform (modules, workspaces, pipelines).
• Observability with Splunk and Grafana (logs, metrics, alerts, dashboards).
• Databases: proficiency in SQL Server (data modeling, query optimization, and maintenance), including experience with legacy versions; familiarity with NoSQL.
• Experience with messaging systems (Amazon SQS, Kafka, or RabbitMQ).
• Experience using Git/GitHub and CI/CD practices.
• Experience working with agile teams (Scrum/Kanban).
• Clear and effective communication; proactivity and autonomy.

Benefits

• Health and dental insurance
• Meal and grocery allowance
• Childcare assistance
• Extended parental leave
• Partnerships with gyms and health/wellness professionals via Wellhub (Gympass) and TotalPass
• Profit Sharing (PLR)
• Life insurance
• Continuous learning platform (CI&T University)
• Employee discount club
• Free online platform dedicated to physical and mental health and well-being
• Pregnancy and responsible parenting course
• Partnerships with online course platforms
• Language learning platform
• And many more