Payments Integrations Engineer

Unlimit; Ciudad de México; On-site; MXN 800,000 - 1,100,000; Full time

Job summary

Unlimit is seeking an implementation engineer to own the path from signed contract to first live transaction. You will read logs, reproduce issues in sandbox, and ship fixes in our services, ensuring smooth merchant onboarding and ongoing integration health.

In this hands-on role you will fix merchant code with engineers, build tooling, and help define scalable processes to stop repeated questions. English communication is essential, and on-site work in Belgrade is expected.

Qualifications

• Proficient in Java and able to work in an existing codebase.
• Experience with REST APIs, authentication, signing, webhooks, and idempotency.

Responsibilities

• Drive integrations from signed to live transactions.
• Read logs, reproduce issues, and ship fixes in our services.
• Create documentation, runbooks, and reusable tooling.

Skills

Java

APIs & Integration

SQL

Troubleshooting

English communication

Tools

Postman

OpenAPI tools

Git

DB client

Job description

Unlimit is seeking an implementation engineer to own the path from signed contract to first live transaction. You will read logs, reproduce issues in sandbox, and ship fixes in our services, ensuring smooth merchant onboarding and ongoing integration health.

In this hands-on role you will fix merchant code with engineers, build tooling, and help define scalable processes to stop repeated questions. English communication is essential, and on-site work in Belgrade is expected.