Senior Software Engineer, Antifraud

About Us
Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.

At Visa, you'll have the opportunity to create impact at scale — tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world.

Join Visa and do work that matters – to you, to your community, and to the world. Progress starts with you.

Job Description

Job Description

The anti-fraud team works with two main systems, one of which is responsible for monitoring transactions and then communicating with third parties to verify whether the transactions are in order or if it is an attempted fraud, and another system that assists other modules in calculating fees and the like.

What You'll Do

• Develop and maintain applications using Golang or Java, following clean code and best software engineering practices.

• Design and implement scalable, reliable, and secure microservices architecture.

• Collaborate with engineering and product teams to refine and deliver technical solutions aligned with business needs.

• Leverage AWS services such as SQS, SNS, DynamoDB, S3, and EventBridge in day-to-day development.

• Use Terraform to provision, maintain, and evolve AWS infrastructure.

• Write unit and integration tests to ensure code quality and system robustness.

• Monitor application health and performance using observability tools (metrics, logs, alerts).

• Participate in code reviews and provide constructive feedback to peers.

• Contribute to architectural and technical discussions, supporting continuous improvement and innovation.

Qualifications

For this role, you must be based in Brazil

• 5 or more years of relevant work experience with a Bachelor's or Associate’s Degree or at least 2 years of work experience with an Advanced degree (e.g. Masters, MBA, JD, MD)

• Experience with Golang

• Experience with Financial Industry or Payments / Authorization Systems

Technical Skills:

• Experience with Financial Industry or Payments / Authorization Systems.

• +3 years of experience with Golang.

• Skilled in Golang and adaptable to other languages like - Java/Groovy or JVM-related.

• Advanced Git user resolves team version control issues.

• Thorough code reviews focusing on cross-domain quality.

• Writes and validates unit, integration, performance, and end-to-end tests.

• Experienced with Swagger, flow diagrams, and API documentation, supports DEVEX and external publishing.

• Proficient with Terraform, Argo, Jenkins, Codefresh for infrastructure and deployment understand related integrations.

• Deep product knowledge, active in feature planning and impact analysis.

• Strong relational database design and non-relational strategy, effective data modeling.

• Proficient in AWS, applying optimal performance techniques.

• Designs scalable microservices and evaluates architectural options.

• Identifies and resolves distributed systems issues for improved reliability.

Preferred Qualifications:

• Work with critical systems is a differential

• Understanding of observability practices (monitoring, tracing, alerting).

Visa is an EEO Employer

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.