Senior Tech Lead .Net, Brazil

CI&T; Brasil; On-site; BRL 180,000 - 320,000; Full time

Benefits offered by this job

Health and dental insurance

Meal and food allowance

Extended paternity leave

Wellness and gym partnerships

Job summary

CI&T is seeking a Tech Lead (.NET) to guide our engineering team across Brazil, Colombia, the UK, and the USA. You will shape technical vision, architecture, and delivery of backend services using C#, .NET Framework/Core, ADO.NET, and SQL Server.

You'll mentor engineers, drive API governance (SOAP/REST), ensure reliability, and collaborate with product managers to translate business needs into scalable roadmaps. Fluency in English is required.

Qualifications

• Proven leadership as Tech Lead/Principal Engineer in production.
• Deep hands-on experience with .NET Framework and .NET Core.
• Strong knowledge of ADO.NET, SQL Server, and data layer optimization.

Responsibilities

• Define and evolve technical direction, architecture, and design patterns for back-end services (C#, ADO.NET, SQL Server).
• Oversee SOAP and REST API governance, versioning, security, and best practices.
• Mentor engineers, lead code reviews, and drive CI/CD and production reliability.

Skills

Technical leadership

.NET expert

ADO.NET

SQL Server

SOAP APIs

REST APIs

XML

Architecture patterns

English communication

Tools

.NET Framework

.NET Core

SQL Server

Azure

Job description

At CI&T, we help large enterprises transform the potential of AI into real business impact with 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.

We are looking for a Tech Lead (.NET) to guide our engineering team, driving the technical vision, architecture, and delivery of complex back-end software solutions. In this role, you will balance strategic technical leadership with hands‑on guidance, working closely with a multicultural team spread across Brazil, Colombia, the UK, and the USA. All communication is conducted in English.

Key Responsibilities

• Technical Leadership & Architecture: Define and evolve the technical direction, architecture, and design patterns for back-end services using C#, ADO.NET, and SQL Server.
• API Governance: Oversee the implementation, evolution, and standardization of SOAP and REST APIs, ensuring robust versioning, security, and best practices.
• Quality & Reliability: Guarantee system reliability and scalability by establishing standards for testing (unit/integration), monitoring, and root-cause analysis for complex production issues.
• Mentorship & Team Growth: Lead code reviews, mentor senior and junior engineers, and foster a culture of engineering excellence and continuous learning.
• System Integration: Oversee the seamless integration of various legacy and modern systems, ensuring high performance and decoupling where necessary.
• DevOps & CI/CD Strategy: Drive the optimization of CI/CD workflows and automated pipelines to enhance development velocity and deployment safety.
• Cross‑functional Collaboration: Partner with product managers, stakeholders, and cross‑border teams to translate business requirements into scalable technical roadmaps.

Required Skills and Qualifications

• Proven Leadership: Experience acting as a Tech Lead, Team Lead, or Principal Engineer in a production environment.
• Expert .NET Ecosystem: Deep, hands‑on experience with .NET Framework and .NET Core.
• Data Layer Mastery: Solid understanding of ADO.NET and SQL Server, with a proven track record in database design, optimization, and performance tuning at scale.
• Integration Expertise: Strong experience designing and maintaining SOAP and RESTful web services, including proficiency in XML serialization/deserialization.
• Architectural Acumen: Mastery of software design patterns, clean architecture, and modern distributed system design.
• Communication: Exceptional communication and stakeholders‑management skills, with resilience in fast‑paced, multicultural environments.
• Language: Advanced/Fluent English proficiency.

Soft Skills

• Strategic Ownership: A proactive mindset focused on driving architectural alignment and continuous engineering improvement.
• Bridge Builder: Ability to translate complex technical concepts to non‑technical stakeholders and vice versa.
• Empathetic Leadership: A collaborative leader who empowers the team, fosters psychological safety, and values shared success.
• Adaptability: Comfort leading through ambiguity, shifting priorities, and evolving business requirements.

Nice‑to‑Have Skills

• Cloud platform expertise, preferably Azure.
• Familiarity with specification‑driven development and agentic approaches to software development.
• Experience leading teams within Agile/Scrum development methodologies.

If you are a seasoned technical leader ready to drive architectural excellence and mentor a high‑performing, diverse team, we invite you to apply and shape the future of our platforms!

• Health and dental insurance
• Meal and food allowance
• 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 platform
• And 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.