Ruby Developer

CloudWalk; São Paulo; Presencial; BRL 120.000 - 160.000; Tempo integral

Resumo da oferta

A fintech company in São Paulo is seeking a Ruby Developer to automate and scale chargeback processes. The role involves refactoring Ruby flows, integrating with major card networks, and leveraging AI APIs for automation. Ideal candidates will have strong Ruby experience and a passion for designing scalable solutions. Join us in building a smarter future for payments.

Qualificações

• At least 3 years of Ruby/Rails experience.
• Experience with RESTful APIs and service integrations.
• Passion for refactoring legacy code.

Responsabilidades

• Refactor and scale existing chargeback and dispute handling flows.
• Integrate with external APIs from Visa, Mastercard, and other partners.
• Work with AI APIs to automate analysis and decision-making.

Conhecimentos

Ruby/Rails experience

RESTful APIs

Understanding of payment networks

AI tools or APIs

Descrição da oferta de emprego

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 aRuby Developerto help usautomate and scale our entire chargeback process, across both ouracquiringandissuingoperations.
• In this role, you will work on building and refactoring robust dispute flows, integrating with major card networks likeVisaandMastercard, and leveragingAI APIsto 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 fromVisa,Mastercard, and other partners
• Work withAI 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 withRESTful APIs, background jobs, and service integrations
• Passion forrefactoring legacy codeand designing scalable solutions
• Understanding ofpayment networks (Visa/Mastercard)and/orchargeback operationsis a big plus
• Familiarity withAI 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.

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