CI&T

AI-driven digital solutions and nearshore development

Senior AI Engineer

AI Application Engineering +1Confirmed live in the last 24 hours

Full-timeRemote in BrazilNo salary listedRemote

About the Job

Requirements

Advanced English proficiency at C1 level or above, with the ability to communicate autonomously with international stakeholders.
Extensive software engineering experience and strong Python skills, including FastAPI or similar frameworks, asynchronous programming, packaging, and testing.
At least one year of experience building LLM-powered applications or agents that reached real users in a pilot or production setting.
Experience with tool calling, prompt design, and handling model failures.
Familiarity with at least one agent framework: Strands, LangGraph, Claude Agent SDK, OpenAI Agents SDK, CrewAI, or LlamaIndex.
AWS experience with Lambda, ECS/Fargate, IAM, S3, DynamoDB, and Bedrock or SageMaker.
Experience with retrieval-augmented generation (RAG), including embeddings, vector stores, chunking, and retrieval tuning.
Comfort with CI/CD, containers such as Docker, and infrastructure as code.
Experience writing internal developer documentation and samples, such as notebooks and quick starts.

Responsibilities

Build SDK features and framework adapters for Strands, Claude Agent SDK, and LangGraph, including memory services, skills, prompt-management integration, and evaluation hooks.
Build and maintain agent and MCP server templates for AgentCore Runtime and ECS Fargate over HTTP and A2A.
Integrate with the AWS Agent Registry, including registration, approval flow, and identity-scoped discovery.
Build and support RAG and knowledge services using Bedrock Knowledge Bases, OpenSearch vector, and ingestion pipelines.
Write contract and integration tests.
Maintain a green release parity gate.
Help use-case teams onboard and debug their agents, and incorporate lessons learned into the platform.
Participate in on-call or office hours and in root-cause analyses (RCAs).

Desired Qualifications

AWS certifications and recent study or project history in agent technology may be accepted in lieu of multiple years of hands-on experience.
Preferred experience with Terraform for infrastructure as code.
Preferred experience with Bedrock AgentCore, including Runtime, Harness, Gateway, Memory, Identity, and Code Interpreter.
MCP server development.
Experience with the A2A protocol, Redis/ElastiCache, OpenSearch, Langfuse or similar LLM observability tools, prompt management, and evaluation tools.

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.

You will build and maintain the core components teams use to ship agents: the Python SDK, agent and MCP templates, memory and context services, the agent registry integration and the FastAPI entry layer. You will often own one component end to end, as primary support.

Responsibilities:

Build SDK features and framework adapters (Strands, Claude Agent SDK, LangGraph), including memory (AgentCore Memory short- and long-term, Redis), skills, prompt management integration, and evaluation hooks.
Build and maintain agent and MCP server templates for AgentCore Runtime and ECS Fargate, over HTTP and A2A.
Integrate with the AWS Agent Registry: registration, approval flow, identity-scoped discovery. Build and support RAG and knowledge services (Bedrock Knowledge Bases, OpenSearch vector, ingestion pipelines).
Write contract and integration tests.
Keep the release parity gate green.
Help use-case teams onboard, debug their agents, and feed what you learn back into the platform.
Take part in on-call or office hours, and in RCAs.

Requirements:

Advanced English proficiency (C1 or above), with autonomy to communicate directly with international stakeholders
Extensive years of experience in software engineering, with strong Python: FastAPI or similar, async, packaging, testing.
1+ year building LLM-powered applications or agents that reached real users (pilot or production).
Experience with tool calling, prompt design and handling model failures.
Familiarity with at least one agent framework (Strands, LangGraph, Claude Agent SDK, OpenAI Agents SDK, CrewAI, LlamaIndex).
AWS experience: Lambda, ECS/Fargate, IAM, S3, DynamoDB, and Bedrock or SageMaker.
Experience with RAG: embeddings, vector stores, chunking and retrieval tuning.
Comfortable with CI/CD, containers (Docker) and infrastructure-as-code (Terraform preferred). Preferred Bedrock AgentCore (Runtime, Harness, Gateway, Memory, Identity, Code Interpreter). MCP server development.
A2A protocol. Redis/ElastiCache, OpenSearch. Langfuse or similar LLM observability, prompt management and evaluation tools.
Experience writing internal developer documentation and samples (notebooks, quick starts).

Nice to Have:

AWS certifications and recent study/project history in agent technology will be accepted in lieu of multiple years of hands-on experience.

#LI-LO1

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 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.

About the Company

CI&T

AI-driven digital solutions and nearshore development

CI&T provides digital solutions to help brands transform their businesses through technology. It focuses on digital strategy and software engineering, offering services such as AI-powered solutions, customer-centric design, and nearshore software development. Products and engagements work by delivering tailored digital initiatives through long-term partnerships, project-based work, and ongoing maintenance; its MRVP approach helps navigate compliance in regulated industries while still enabling innovation. CI&T differentiates itself through a global delivery model, a focus on diversity and inclusion, and an emphasis on combining strategy, engineering, and design to drive business transformation. The company targets a wide range of clients, including regulated sectors and quick-service restaurants, and aims to help clients maximize resources, scale rapidly, and thrive in a post-digital transformation landscape.

Company size: 5,001-10,000
Company stage: IPO
Headquarters: São Paulo, Brazil
Founded: 1995

Recently Posted Jobs

Explore more opportunities at CI&T

See more jobs