B3 Tech Stack

Brazil's largest exchange operator and capital-markets infrastructure

Financial Services São Paulo, São Paulo 1,001–5,000 employees Founded 2017 Public Company

B3 operates Brazil's primary financial exchange and settlement infrastructure, processing high-volume trading and clearing across equities, derivatives, and fixed-income markets. The tech stack reveals a dual-engine architecture: legacy systems built on Java, Oracle, and FIX protocols alongside a modernization push toward Python, Kafka, and cloud (Azure/OCI), combined with emerging AI and machine-learning layers (TensorFlow, PyTorch, LangChain). The hiring velocity and project backlog—cloud migration, legacy modernization, core platform rewrites, and AI architecture design—signal an organization mid-transformation, with senior-level engineering concentrated on reliability and latency optimization in a mission-critical, high-transaction-volume environment.

Tech Stack 144 technologies

Core StackPython NumPy Pandas scikit-learn TensorFlow PyTorch Apache Spark Kafka LangChain Java Oracle JUnit Linux Jira SAS .NET GitHub GitHub Actions Keras Pydantic LangFuse LlamaIndex C/C++ SQL JMS Tibco ZeroMQ FIX Teams WSL+114 more

AdoptingAzure OCI

What B3 Is Building

◆Challenges

High availability low latency environment
Ensuring high availability
High transaction volume
Modernizing legacy systems
Ensuring reliability of trading systems
High availability performance
Integrating databricks with legacy systems
Reducing latency in high-volume transactions
Modernizing distributed architectures
Low latency environments

▲Active Projects

Cloud migration to azure/oci
Web product evolution
Advanced load testing scripts development
Strategic reliability scalability and performance projects
Modernization of legacy systems
Core platform engine development
Modernização do balcão
Ai architecture design
Strategic production projects
Puma trading platform

Hiring Activity

Accelerating55 roles · 40 in 30d

Department

Engineering

Product

Data

Finance

Ops

Legal

Marketing

Support

Seniority

Senior

Mid

Junior

Intern

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About B3

B3 is a public financial-services company headquartered in São Paulo, operating Brazil's stock exchange, derivatives market, and clearing infrastructure. As one of the world's largest exchange operators by infrastructure scale, the company handles equities, fixed-income, and derivatives trading alongside settlement and custody services. The organization spans 1,001–5,000 employees with concentrated engineering talent and is actively scaling cloud migration and system modernization initiatives while maintaining real-time trading and clearing operations across Brazil.

HeadquartersSão Paulo, São Paulo

Company Size1,001–5,000 employees

Founded2017

Hiring MarketsBrazil

Frequently Asked Questions

What is B3's tech stack?

B3 runs Python, Java, C/C++, Oracle, Kafka, Apache Spark, TensorFlow, PyTorch, and legacy FIX/Tibco messaging infrastructure. They are adopting Azure and OCI for cloud migration.

What is B3 working on?

Active projects include cloud migration (Azure/OCI), legacy system modernization, core platform engine rewrites, AI architecture design, and performance/reliability scaling for high-transaction-volume trading systems.