Offer summary

Qualifications:

Strong experience in Ruby and Rails (minimum 3 years)., Proficiency with RESTful APIs, background jobs, and service integrations., Knowledge of payment networks like Visa and Mastercard, and chargeback operations., Familiarity with AI tools or APIs such as OpenAI or ML models..

Key responsibilities:

Refactor and scale existing chargeback and dispute handling flows in Ruby.

Integrate with external APIs from Visa, Mastercard, and partners.

Work with AI APIs to automate analysis, decision-making, and documentation.

Collaborate with teams to understand business rules and improve processes.

Job description

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, were now expanding our neural network literally and metaphorically.

About the position
Were 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 Youll 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 andor machine learning) to automate analysis, decisionmaking, and documentation
Build resilient services to support endtoend 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 RubyRails 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 (VisaMastercard) andor chargeback operations is a big plus
Familiarity with AI tools or APIs (e.g. OpenAI, Langchain, ML models) is a nicetohave
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, AIdriven future for payments—together.

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