Backend Engineer — Scalable Microservices & APIs

VISA; Warszawa; Hybrid; PLN 131,000 - 214,000; Full time

Job summary

Visa hires Software Engineers to design, build, test, and maintain backend services and microservices powering our payments platform. You will write, review, and debug code across backend and data layers, integrate systems via APIs, and help shape scalable data pipelines in cloud environments.

All roles require digital fluency and collaboration with cross-functional teams. You will contribute to secure coding practices, CI/CD pipelines, observability, and production support while advancing

Qualifications

• Bachelor's degree or 3+ years of relevant work experience.
• Experience in developing and/or implementing backend applications and microservices.
• Experience in designing and implementing RESTful APIs and service-to-service integrations.
• Experience in debugging distributed applications and performing root cause analysis on software issues.
• Experience in maintaining CI/CD pipelines and deploying backend services.
• Experience in applying secure coding practices and complying with regulatory standards.

Responsibilities

• Write, modify, and review high-quality, testable code across back-end, and data layers.
• Integrate systems via APIs, messaging queues, and databases.
• Develop and maintain data pipelines and large-scale data processing jobs using appropriate frameworks and cloud services.
• Develop unit, integration, and end-to-end tests with a strong focus on automation.
• Maintain CI pipelines to run tests automatically upon code commits.
• Debug and perform root cause analysis on issues, and enforce code quality gates through reviews and static analysis.
• Build and maintain CI/CD pipelines; deploy applications to various environments using containerization and orchestration tools.
• Monitor applications in production using observability tools; investigate incidents, analyze logs, identify root causes, and implement fixes.
• Optimize code for performance, cost efficiency, and maintainability.
• Apply secure coding practices, manage secrets properly, validate inputs, and ensure authentication/authorization is robust.
• Comply with regulatory standards and maintain documentation for audits.

Skills

Backend development

Java

Microservices

RESTful APIs

CI/CD

Cloud-native

Observability

AI-assisted coding

Education

Bachelor's degree or 3+ years experience

Tools

Docker

Kubernetes

Cloud platforms

Job description

Visa hires Software Engineers to design, build, test, and maintain backend services and microservices powering our payments platform. You will write, review, and debug code across backend and data layers, integrate systems via APIs, and help shape scalable data pipelines in cloud environments.

All roles require digital fluency and collaboration with cross-functional teams. You will contribute to secure coding practices, CI/CD pipelines, observability, and production support while advancing