What the job entails:
- You’ll be part of a small, sharp team applying Network Science to real-world business problems inside a high-impact AI exploration unit. We’re turning raw data into meaningful graphs, analyzing connections, detecting hidden patterns, and building tools to help autonomous agents make better decisions.
- You won’t be optimizing dashboards or stuck tweaking marketing reports. You’ll be building intelligence infrastructure.
Your main tasks:
- Transform tabular data into graphs that expose structure and behavior.
- Research, prototype, and deploy graph algorithms to detect communities, centrality, anomalies, and more.
- Build and maintain ETL pipelines for graph data extraction and enrichment.
- Design graph visualizations to support human and machine understanding.
- Collaborate with Data Scientists and LLM Engineers to integrate network-based reasoning into our autonomous systems.
- Experiment often, document clearly, and ship code that matters.
Technologies / techniques used:
- Python (heavy use)
- SQL (PostgreSQL, BigQuery)
- Graph libraries (e.g. NetworkX, cuGraph, Graphistry)
- Visualization tools (Plotly, Dash, D3, etc.)
- Neo4j or other graph databases
- GCP (preferred) or any major cloud provider
- GitHub + CI/CD pipelines
What you'll need:
- Strong Python and SQL skills.
- Ability to break down abstract problems into experimental pipelines.
- Clear communication skills in Portuguese and English.
- Curiosity and initiative. You find answers, you don’t wait for them.
- Solid data wrangling and visualization abilities.
- Willingness to go deep into Network Science, even if you’re not an expert (yet).
Nice to have:
- Experience with NetworkX, Neo4j, or any graph database.
- Previous Experience or openness to learn and work with Elixir codebases
- Background in graph theory, link prediction, community detection.
- Knowledge of probabilistic modeling or LLM integration with graph-based systems.
- Familiarity with GCP and large-scale data pipelines.
Recruiting process outline:
- Open-ended technical case – you’ll analyze a small graph dataset and extract insights.
- Technical interview – discuss your solution and background.
- Cultural interview – aligned expectations, mutual fit.
- If you’re not interested in doing a real technical assessment or engaging in an honest conversation, don’t apply.
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What We Do
We are democratizing the payments industry in Brazil, by empowering entrepreneurs through technological, inclusive, and life-changing solutions. Based in Brazil, CloudWalk is a high-end global payment network built on modern technology and proprietary blockchain, focused in bringing a revolution to the payment ecosystem for small and medium-sized businesses. As a unicorn, the company has provided its customers with more than R$ 1 billion in savings by charging fair fees on its transactions and is now present in more than 300.000 businesses across 5.000 brazilian cities. With investors such as the Valor Capital Group, HIVE Ventures and Coatue, the company has already raised US$ 365.5 million in investments and R$3.4 billion in FDICs for anticipation of receivables in its network of financial solutions. In 2022, it was the only brazilian fintech to be featured in the "The Retail Tech 100" ranking by CB Insights, on the "Protection Solutions for Payments and Frauds".






