Senior Backend Engineer-Go/JVM, Cloud & Distributed Systems

Vonage; Kraków; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Medical Insurance (Allianz)

Life Insurance (Uniqa)

Glasses Reimbursement

Kafeteria (My Benefit)

Discretionary Time Off (DTO)

Volunteer Time (VTO)

Ericsson Care Line

Job summary

Vonage, Kraków, Poland, is seeking backend engineers to help shape high-performance cloud communications. You will work on highly concurrent, distributed services within the RNE group, contributing to architecture, feature development, testing, and performance tuning.

Ideal candidates have Go or JVM (Java/Spring Boot) experience, strong problem-solving, and a passion for scalable, reliable systems. This role involves collaboration, code reviews, and occasional on-call duties.

Qualifications

• Solid Go or Java/Spring Boot programming experience with willingness to learn Go.
• Experience developing enterprise-grade systems at scale.
• Experience with highly concurrent, distributed architectures and systems.
• Experience with containerised applications and REST/HTTP based services.
• Experience with relational and non-relational databases (PostgreSQL, Redis).
• Strong test suite design skills (Unit, Integration, Smoke).
• Clear and effective communication across team members.

Responsibilities

• Develop and maintain highly concurrent and distributed backend services.
• Contribute to architectural discussions and shape technical decisions.
• Design, develop and test new features with a focus on quality and reliability.
• Profile and optimise system performance, diagnose and resolve issues.
• Support the release and documentation of developed features.
• Estimate effort required to develop and implement solutions.
• Contribute to coding standards and development processes.
• Provide out-of-hours support as part of on-call rota.

Skills

Go / JVM

Distributed systems

REST/HTTP

Containerization

PostgreSQL/Redis

Test design

Communication

Tools

Kafka

Kubernetes

Terraform

AWS

SQS/SNS/DynamoDB

Job description

Vonage, Kraków, Poland, is seeking backend engineers to help shape high-performance cloud communications. You will work on highly concurrent, distributed services within the RNE group, contributing to architecture, feature development, testing, and performance tuning.

Ideal candidates have Go or JVM (Java/Spring Boot) experience, strong problem-solving, and a passion for scalable, reliable systems. This role involves collaboration, code reviews, and occasional on-call duties.