Senior Backend Developer

Barcelona, Spain Buenos Aires, Buenos Aires, Argentina Until 8/23/2026 First posted May 3, 2025 Last posted May 3, 2025
Job description

AstroPay. Fast, simple, borderless.

We hire smart, driven people who hate bureaucracy and love ownership. Builders, not talkers. We move fast. We ship. We improve. Every day.

You’ll be surrounded by a global A-team—diverse, talented, and radically committed to doing great work. No politics. No passengers. Just impact.

If you're after comfort, look elsewhere. If you're ready to grow at speed, challenge everything, and build something real—join us.

🔍 Overview

We are seeking experienced Senior Backend Developers to join our engineering teams. This role involves designing and building scalable backend systems that power AstroPay’s core products. Candidates should have a solid grasp of backend architectures, microservices, APIs, and data handling.


💼 About the role

As a Senior Backend Developer at AstroPay, you’ll join a high-impact team responsible for designing, building, and maintaining the core services that power our global financial ecosystem. Your work will be instrumental in supporting high-volume, real-time transactions across multiple regions. This role goes beyond writing clean and scalable code — it’s about understanding system architecture, optimizing performance, and collaborating with other teams to build solutions that are both innovative and robust. If you're passionate about backend engineering and want to contribute to a platform that moves millions of dollars daily, this is your opportunity.


Responsibilities
- Design, develop and maintain backend systems, APIs and databases.
- Work closely with product teams to deliver high-quality solutions.
- Contribute to architectural decisions and ensure code quality and performance.
- Monitor and improve system reliability.

Requirements
- 5+ years of experience as a backend developer.
- Strong programming skills in  Java, Go, Node.js or similar.
- Strong knowledge in databases.
- Experience with distributed systems and microservices.
- Familiarity with CI/CD pipelines, cloud environments, and database optimization.

Important Notice: By submitting your application for this position, you acknowledge and consent to the completion of a comprehensive background check as a mandatory part of the final hiring process. This procedure is essential to uphold the standards and integrity of our organization. We appreciate your cooperation and understanding.

About this role

Summary

Design and build scalable backend systems for financial transactions.

Job title

Senior Backend Developer

Experience level

5+ years

Industry

finance

Location requirements

Candidates must be located in specified cities; remote not allowed.

Salary

Not specified

Management role

No

Skills & keywords

Required skills

JavaGoNode.jsdatabasesdistributed systemsmicroservicesCI/CDclouddatabase optimization

Preferred skills

None specified

Specializations

backendmicroservicesAPIsdatabasescloud
Locations

Structured locations inferred from the posting.

Barcelona, Spain

On-site City

Buenos Aires, Argentina

On-site City

London, UK

On-site City

Madrid, Spain

On-site City

Montevideo, Montevideo Department, Uruguay

On-site City

São Paulo, State of São Paulo, Brazil

On-site City