Basic knowledge of Python programming., Interest or experience with AI tools such as LLMs and ML models., Analytical and problem-solving skills., Eagerness to learn about chargeback operations and payment networks..
Key responsibilities:
Automate manual chargeback processes using Python and AI technologies.
Collaborate with developers to design and test automation solutions.
Monitor and adapt to changes in card network rules and ensure compliance.
Analyze dispute and fraud patterns to improve detection and recovery.
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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".
We are not just another fintech unicorn. We are a pack of dreamers, makers, and tech enthusiasts building the future of payments. With millions of happy customers and a hunger for innovation, were now expanding our neural network literally and metaphorically.
About the role
We’re looking for a Chargeback Analyst with a strong interest in AI and automation to help us scale and evolve our dispute operations through technology.
You’ll work alongside product managers, data scientists, and engineers to bring automation to every layer of the chargeback process — from dispute analysis to documentation generation, deadline monitoring, fraud detection, and beyond.
Your main focus will be to build smart, scalable solutions using Python and AI tools (ML models, LLMs, etc.), always aligned with the evolving rules from Visa, Mastercard, Elo, and Amex.
What Youll Be Doing
Learn and master chargeback rules across acquiring and issuing operations (we’ll teach you)
Work closely with developers to automate manual processes using Python
Design and test automations powered by machine learning and generative AI
Stay up to date with card network (Visa, Mastercard, Elo, Amex) changes and ensure operational compliance
Help translate business rules and customer needs into datadriven, scalable solutions
Investigate dispute and fraud patterns using analytics and classification models
Build or improve internal tools that boost productivity and recovery efficiency
What You Need To Succeed
Basic knowledge of Python and interest in applying it to realworld problems
Interest or experience with AI tools: LLMs (e.g. OpenAI), ML models, classification, NLP, etc.
Analytical and problemsolving mindset
Eagerness to learn about chargeback operations and payment networks
Strong communication skills and team collaboration
Proactive and curious — you ask “why” and seek patterns
Ability to understand and act on network updates and deadlines
Join us at CloudWalk, where we’re not just engineering solutions; we’re building a smarter, AIdriven future for payments—together.