Backend Engineer

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October 1

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CloudWalk, Inc.

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Fintech • Blockchain • Artificial Intelligence

CloudWalk, Inc. is focused on revolutionizing the payments industry by democratizing financial services and empowering entrepreneurs through innovative solutions. Their mission is to create a fair and technologically advanced payment network on Earth and beyond. Utilizing AI and blockchain, CloudWalk offers products such as InfinitePay, a financial platform serving businesses in Brazil, and JIM, an instant payment system in the US. Stratus, their high-performance blockchain, supports global payment networks. CloudWalk emphasizes customer engagement and disruptive economic models to transform how merchants sell and profit.

201 - 500 employees

💳 Fintech

🤖 Artificial Intelligence

💰 $150M Series C on 2021-11

📋 Description

• We are looking for a Back-End Developer to help us automate and scale our entire chargeback process, across both acquiring and issuing operations. • In this role, you will work on building and refactoring robust dispute flows, integrating with major card networks like Visa and Mastercard, and leveraging AI APIs to bring intelligence and automation to the core of our operation. • You’ll be responsible for connecting internal and external APIs, designing scalable architecture, and making our dispute handling smarter, faster, and more autonomous.

🎯 Requirements

• Strong back-end development experience (3+ years), regardless of primary programming language. • Experience with RESTful APIs, background jobs, and service integrations. • Passion for refactoring legacy code and designing scalable solutions. • Understanding of payment networks (Visa/Mastercard) and/or chargeback operations is a strong plus. • Familiarity with AI tools or APIs (e.g., OpenAI, LangChain, ML models) is a nice-to-have. • Ownership mindset and willingness to build from scratch. • Willingness to occasionally work with Ruby, as part of the existing system is built on it.