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CloudWalkCL

Ruby Developer

CloudWalk is a global financial technology company that pioneers AI and blockchain-driven solutions, including payment processing and digital banking, through its brands InfinitePay (Brazil) and JIM.com (U.S.).

CloudWalk

Employee count: 501-1000

Brazil only
About CloudWalk: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, we're now expanding our neural network - literally and metaphorically.

About the position

  • We're looking for a Ruby Developer to help us automate and scale our entire chargeback process, across both our 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.

What You'll Be Doing

  • Refactor and scale existing chargeback and dispute handling flows written in Ruby
  • Integrate with external APIs from Visa, Mastercard, and other partners
  • Work with AI APIs (generative and/or machine learning) to automate analysis, decision-making, and documentation
  • Build resilient services to support end-to-end chargeback processes for both issuing and acquiring
  • Collaborate with product, data and operations teams to deeply understand business rules and pain points
  • Write clean, maintainable code and contribute to a culture of continuous improvement

What You Need To Succeed

  • Strong Ruby/Rails experience (at least 3 years)
  • 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 big plus
  • Familiarity with AI tools or APIs (e.g. OpenAI, Langchain, ML models) is a nice-to-have
  • Ownership mindset and a willingness to build from scratch
Join us at CloudWalk, where we’re not just engineering solutions; we’re building a smarter, AI-driven future for payments—together.
By applying for this position, your data will be processed as per CloudWalk's Privacy Policy that you can read here in Portuguese and here in English.

About the job

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Posted on

Job type

Full Time

Experience level

Mid-level

Location requirements

Hiring timezones

Brazil +/- 0 hours

About CloudWalk

Learn more about CloudWalk and their company culture.

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At CloudWalk, we are revolutionizing the global financial landscape through groundbreaking technology, fundamentally changing how individuals and small to medium-sized businesses manage their money. Our core mission is to democratize access to world-class financial services, and we achieve this by pioneering AI and blockchain-driven solutions. Through our flagship brands, InfinitePay in Brazil and JIM.com in the U.S., we offer a comprehensive suite of products including digital accounts, innovative Tap to Pay functionality, instant payment processing, and a range of tools designed to foster business growth. Our commitment to innovation is relentless, as we continuously integrate cutting-edge artificial intelligence across our entire product lineup. This ensures that CloudWalk's offerings are consistently at the forefront of efficiency, user-friendliness, and technological advancement, making sophisticated financial management smarter and more accessible to a broad and diverse audience worldwide. We believe in empowering our customers, transforming complex financial operations into seamless and intuitive experiences.

CloudWalk's technological prowess is built upon a modern technology stack and our proprietary blockchain, STRATUS. This high-performance, secure, and scalable open-source blockchain is specifically designed for global payment networks, capable of processing up to 1,800 transactions per second with the potential for infinite growth through sharding and multi-raft consensus models. This robust infrastructure forms the backbone of our AI ecosystem, enabling continuous improvements and fostering innovations that directly benefit our users. Our approach is not just about providing services; it's about building a new, fair payment network that challenges the traditional system, ensuring that merchants, particularly small and medium-sized enterprises, can thrive. By focusing on disruptive economics and deep customer engagement, we aim to unlock purchasing power and transform how merchants sell and profit, ultimately contributing to a healthier and more dynamic economic environment. Our journey is marked by significant milestones, including substantial revenue growth and a rapidly expanding customer base, underscoring our position as a leader in the fintech revolution.

Employee benefits

Learn about the employee benefits and perks provided at CloudWalk.

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Meal allowances

Allowance for meals.

Health care

Health care coverage.

Dental care

Dental care coverage.

Paid vacation

30 days of paid vacation.

View CloudWalk's employee benefits
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CloudWalk

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CloudWalk hiring Ruby Developer • Remote (Work from Home) | Himalayas