Senior Backend Developer (Services)

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SeniorZdalnie·KrakówFull-time

#436048·Dodano 3 miesiące temu·4

Źródło: payabl.

🚫Oferta wygasła. Ta oferta pracy nie jest już aktywna i rekrutacja została zakończona.

Tech Stack / Keywords

PythonAsyncIOFastAPI MySQL PostgreSQL PHP Perl JavaScript Kafka Redis

Firma i stanowisko

payabl. is a licensed financial company specializing in global payments and multi-currency banking solutions. It offers a unified platform, payabl.one, providing global financial services with principal membership in card schemes.

Wymagania

5+ years of backend development experience with strong Python expertise
Deep knowledge of AsyncIO and FastAPI
Experience building non-blocking, high-reliability microservices
Strong experience with relational databases such as MySQL and PostgreSQL
Solid understanding of API design and third-party integrations
Experience implementing webhooks, callbacks, and retry strategies
Strong testing practices including unit and integration testing
Ability to work with legacy systems and migrate them into modern architectures
Strong analytical and problem-solving skills
Ownership mindset and ability to work autonomously within a defined architecture

Nice to Have:

Experience with PHP, Perl, or JavaScript
Familiarity with Kafka, Redis, or event-driven architectures
Exposure to CI/CD pipelines, Docker, and Kubernetes
Experience in fintech, payments, or e-commerce domains
Knowledge of 3DS, tokenization, or payment gateway integrations
Proven experience migrating systems across technologies or paradigms

Obowiązki

Design, build, and maintain high-performance Python microservices using FastAPI and AsyncIO
Analyze legacy systems and extract business logic into modern architectures
Refactor and migrate existing modules into clean, scalable, and maintainable services
Ensure system reliability through idempotency, fault tolerance, and robust error handling
Design and integrate external APIs handling edge cases, retries, and failures
Implement and manage webhooks, callbacks, and complex retry mechanisms
Write high-quality unit and integration tests
Collaborate with cross-functional teams to ensure service stability and performance
Contribute to architectural discussions and continuous system improvements
Take ownership of services end-to-end, from design to production

Benefity

Work on high-impact systems in a fast-growing fintech environment
Be part of a team that values ownership, adaptability, and engineering excellence
Help modernize and scale a platform handling real-world financial operations
Contribute to meaningful technical decisions and system evolution

payabl

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