Cielo Tech Stack

Payment processing and retail technology platform serving 1M+ Brazilian merchants

Financial Services Barueri, São Paulo 5,001–10,000 employees Founded 1995 Privately Held

Cielo operates a payment and retail services infrastructure for Brazil's merchant ecosystem, with a 5,000+ person organization structured heavily around sales (258 roles) and customer acquisition. The tech stack reflects dual priorities: transaction processing (FastAPI, Kafka, REST APIs, OAuth/JWT security) and data-driven decision-making (Python, R, SAS, Power BI, Tableau). Current hiring velocity and project focus emphasize sales productivity and new merchant activation, while adoption of Azure, MLOps, and FinOps signals a shift toward cloud-native operations and cost optimization in a margin-sensitive business.

Tech Stack 200 technologies

Core StackPython FastAPI Flask Django React GraphQL Kafka AWS Docker GitHub Actions Miro Jira Azure DevOps SAS Power BI Tableau Microsoft Office REST API MCP WebSockets MQTT Azure GCP OAuth 2.0 JWT OpenID Git SQL R Excel+169 more

AdoptingMLOps FinOps Azure Azure OpenAI Azure AI Services

What Cielo Is Building

◆Challenges

Protecting existing clients from competitors
Increasing new business productivity
Recovering backup clients
Retaining clients against competitors
Expanding new business
Increasing portfolio profitability
Reducing costs
Protecting current clients from competitor actions
Improving sales performance
Acquiring new clients

▲Active Projects

Affiliate base activation
Campaigns and training initiatives
Product portfolio implementation
New business productivity training
New affiliation activation
Performance monitoring of partnerships
Sales strategy development
Prospecting new business
Intelligent agent development using copilot studio and power platform
Data pipeline and automation development with sql, python, pyspark on azure, aws, databricks

Hiring Activity

Steady380 roles · 150 in 30d

Department

Sales

258

Data

Engineering

Security

Finance

Ops

Product

Seniority

Junior

111

Mid

Manager

Senior

Intern

Lead

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About Cielo

Cielo is a financial services and technology company that provides payment processing, point-of-sale solutions, and connected merchant services across Brazil. Founded in 1995 and headquartered in Barueri, São Paulo, the company operates at scale with over 1 million merchants relying on its infrastructure. The product portfolio spans electronic payment methods, e-commerce, mobile payments, and card readers, coupled with business advisory and training services. Sales-led growth dominates current strategy, with active projects centered on affiliate activation, new merchant onboarding, and portfolio expansion. The organization maintains rigorous security standards and logistics capabilities alongside technology infrastructure.

HeadquartersBarueri, São Paulo

Company Size5,001–10,000 employees

Founded1995

Hiring MarketsBrazil

Frequently Asked Questions

What is Cielo's tech stack?

Cielo uses Python, FastAPI, Flask, Django, React, Kafka, and REST APIs for transaction processing and backend services. Data operations run on Azure, AWS, GCP with Power BI, Tableau, R, and SAS for analytics. Security relies on OAuth 2.0, JWT, and OpenID protocols.

How many employees does Cielo have?

Cielo employs 5,001–10,000 people, headquartered in Barueri, São Paulo. The organization is sales-heavy, with data, engineering, and security as smaller operational functions.