Senior Java Developer (10/902)

INFOLET SP. Z O.O.; Województwo małopolskie; On-site; PLN 223,200 - 334,800; Full time

Benefits offered by this job

Relocation package

Extended medical care

Multisport Benefit Card

Life insurance

Job summary

INFOLET SP. Z O.O. in Poland is seeking a Senior Backend Developer responsible for designing and developing modern payment processing solutions with a focus on microservices architecture. The ideal candidate will have over 8 years of experience in backend development, particularly in Java, and hands-on experience with microservices architecture. The position includes a relocation package and additional benefits such as extended medical care and a Multisport Benefit card.

Qualifications

• 8+ years of experience in backend development, especially in Java.
• Strong experience in API design and distributed systems.
• Hands-on experience with microservices architecture using Spring Boot.
• Solid understanding of cloud environments like AWS, Azure, or GCP.
• Experience with CI/CD and DevOps practices.

Responsibilities

• Design and develop modern payment processing solutions based on microservices architecture.
• Build and maintain high-quality backend services with a focus on performance and scalability.
• Contribute to the modernization of legacy systems and migration towards cloud-based solutions.
• Collaborate with DevOps teams to enable CI/CD, automation, and DevSecOps practices.

Skills

Backend development (Java)

API design

Microservices architecture (Spring Boot)

Kafka

Docker

Kubernetes

Cloud environments (AWS / Azure / GCP)

CI/CD and DevOps practices

Monitoring and observability tools (Prometheus, Grafana, Splunk)

System design and architectural patterns

Performance, scalability, and resiliency

Tools

Prometheus

Grafana

Splunk

OpenTelemetry

Job description

You will join a newly established team responsible for building next-generation payment processing capabilities as part of a large-scale transformation initiative.

The goal is to create a modern, scalable, and reusable payment processing engine based on microservices and cloud technologies. The team focuses on reusing and enhancing existing solutions (inner sourcing model) to accelerate delivery, reduce costs, and improve quality.

This role combines hands‑on engineering with architectural responsibility and technical leadership within a high‑impact, business‑critical domain.

YOU WILL

• Design and develop modern payment processing solutions based on microservices architecture
• Build and maintain high‑quality backend services (Java + APIs) with strong focus on performance and scalability
• Create and own architectural artefacts (LLD, data models, gap analysis)
• Ensure high availability, resiliency, and reliability of systems
• Contribute to modernization of legacy systems and migration towards cloud‑based solutions
• Collaborate closely with DevOps teams to enable CI/CD, automation, and DevSecOps practices
• Work with technologies such as Kafka, Docker, Kubernetes, and service mesh
• Drive best engineering practices, quality standards, and code reviews
• Act as a technical leader and mentor for other engineers
• Identify and resolve complex technical and architectural challenges
• Support observability and monitoring (Prometheus, Grafana, Splunk, OpenTelemetry)
• Contribute to technical decision‑making and long‑term technology strategy

MUST HAVE

• 8+ years of experience in backend development (Java)
• Strong experience in API design and distributed systems
• Hands‑on experience with microservices architecture (Spring Boot)
• Experience with Kafka, Docker, Kubernetes
• Solid understanding of cloud environments (AWS / Azure / GCP)
• Experience with CI/CD and DevOps practices
• Strong knowledge of system performance, scalability, and resiliency
• Experience with monitoring and observability tools (e.g. Prometheus, Grafana, Splunk)
• Very good understanding of system design and architectural patterns
• Experience working in complex, large‑scale environments

OUR OFFER

• Relocation package (4500 PLN total value), paid in three installments (1500 PLN per month) in case your permanent presence in the office is mandatory, and you need to relocate from another city.
• Benefits: Extended medical care (over 2000 medical facilities in Poland, 80 in Kraków) for you and your family; Multisport Benefit card; life insurance