Senior Backend Engineer: Java/PHP APIs & Observability

SoftServe; Polska; On-site; PLN 180,000 - 280,000; Full time

Job summary

SoftServe in Poland is seeking a Senior Backend Engineer to join our team supporting a European public sector client. You will own server-side services, APIs, and data access, using Java or PHP in containerized environments.

You will collaborate with cross-functional teams, design secure RESTful APIs with OpenAPI, optimize data models, and implement observability with APM and OpenTelemetry. Fluency in English or French is required.

Qualifications

• Master's degree or 5 years of higher education
• 10+ years IT experience
• Proficiency in Java and PHP with Spring Boot and Hibernate
• Relational DB skills (PostgreSQL, Oracle, MySQL)
• NoSQL knowledge (MongoDB, CosmosDB)
• RESTful APIs and OpenAPI/Swagger
• OAuth 2.0, OpenID Connect, JWT
• Containerization with Docker and orchestration with Kubernetes
• APM tools and OpenTelemetry
• English or French at B2+ level

Responsibilities

• Design, develop, and maintain back-end services using Java, PHP and Spring Boot/Hibernate/Node.js
• Own services including correctness, error handling, performance, and security
• Collaborate with engineers, front-end, and stakeholders; multilingual meetings and code reviews
• Design, build, document RESTful APIs with OpenAPI/Swagger and auth mechanisms
• Design/optimize relational/document data structures; write complex SQL; balance consistency vs performance
• Set up observability tooling (APM, logs, traces) and analyze metrics
• Diagnose complex back-end issues and implement robust solutions
• Build/deploy apps with containers/orchestration; adhere to Git workflows and maintain docs

Job description

SoftServe in Poland is seeking a Senior Backend Engineer to join our team supporting a European public sector client. You will own server-side services, APIs, and data access, using Java or PHP in containerized environments.

You will collaborate with cross-functional teams, design secure RESTful APIs with OpenAPI, optimize data models, and implement observability with APM and OpenTelemetry. Fluency in English or French is required.