Senior Backend Engineer: End-to-End Builder with AI Tools

Aplazo; Poland; Remote; PLN 211,595 - 338,552; Full time

Job summary

Aplazo is seeking a Senior Backend Engineer in Poland to drive the development of backend systems. You'll be responsible for independent feature ownership, delivering quality code, and mentoring engineers. The ideal candidate has at least 3 years of backend experience, strong Java skills, and fluency in Spanish. You will also work with AWS infrastructure and have the chance to contribute significantly to a growing fintech platform, fostering financial access and opportunity in Latin America.

Qualifications

• 3+ years building backend systems.
• Strong experience with Java, familiarity with Python/Go is a plus.
• Good understanding of distributed systems, APIs, and cloud infrastructure.
• Strong testing discipline including unit tests and integration tests.

Responsibilities

• Own features end-to-end, from design to deployment.
• Write quality, clean, testable code.
• Mentor newer engineers and assist with debugging.

Skills

Backend system development

Java (Python/Go a plus)

Distributed systems understanding

Testing discipline

Debugging skills

AI tool usage

Tools

AWS (ECS, Lambda)

PostgreSQL

Kafka

DataDog

Job description

Aplazo is seeking a Senior Backend Engineer in Poland to drive the development of backend systems. You'll be responsible for independent feature ownership, delivering quality code, and mentoring engineers. The ideal candidate has at least 3 years of backend experience, strong Java skills, and fluency in Spanish. You will also work with AWS infrastructure and have the chance to contribute significantly to a growing fintech platform, fostering financial access and opportunity in Latin America.