Software Engineer III

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

Join Vonage and help us innovate cloud communications for businesses worldwide!

About Vonage

Vonage is the emerging leader in the $100B+ cloud communications platform (CPaaS) market. Customers like Airbnb, Viber, WhatsApp, Snapchat, and many others depend on our APIs and SDKs to connect with their customers all over the world. As businesses continue to shift to a real-time, customer-centric communications model, we are experiencing a time of impressive growth.

Why This Role Matters

The RNE (Registration, Numbers and Enablement) group within Vonage's Foundation Engineering department works across four core product domains: Registration, Numbers, Number Intelligence, and Know Your Customer (KYC). Our backend engineers face exciting challenges associated with high-performance, distributed systems and processing large volumes of data in real time. We work on an exciting mix of both greenfield and existing projects, giving engineers the opportunity to explore new technologies.

What You Will Do

• Develop and maintain highly concurrent and distributed backend services;
• Contribute to architectural discussions and help shape technical decisions within the team;
• Design, develop and test new features with a strong focus on quality and reliability;
• Profile and optimise system performance, diagnosing and resolving issues proactively;
• 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 an on-call rota.

What You Will Bring

Essential:

• Solid programming skills in Go (Golang) or strong experience with JVM technologies (Java/Spring Boot) and a genuine desire to learn Go;
• Experience developing and maintaining enterprise-grade systems at scale;
• Experience with highly concurrent, distributed architectures and systems;
• Experience with containerised applications;
• Experience building REST/HTTP based services;
• Experience with relational and non-relational databases (e.g. PostgreSQL, Redis);
• Some experience contributing to architectural decisions within a team;
• Strong test suite design skills, including Unit, Integration and Smoke tests;
• Clear and effective communication of problems and solutions across team members.

Nice to Have:

• Familiarity with AWS services (SQS, SNS, DynamoDB);
• Exposure to Kafka, Kubernetes or Terraform;
• Understanding of Continuous Delivery in cloud environments;
• General understanding of the telecommunications industry.

How you’ll benefit:

• Medical Insurance (Allianz)
• Life Insurance (Uniqa)
• Glasses Reimbursement
• Kafeteria (My Benefit)
• Discretionary Time Off (DTO)
• Volunteer Time (VTO)
• Ericsson Care Line

There’s no perfect candidate.

You don't need all the preferred qualifications to make a valuable impact on our team. Our employees and customers come from diverse backgrounds, so if you're passionate about what you could achieve at Vonage, we'd love to hear from you.

To learn how we process your personal data during the recruitment process, please refer to our Privacy Notice .

Who we are:

Vonage is a global cloud communications leader. And your talent will further help brands - such as Airbnb, Viber, WhatsApp, and Snapchat - accelerate their digital transformation through our fully programmable-based unified communications, contact center solutions, and communications APIs.

Note: The purpose of this profile is to provide a general summary of essential responsibilities for the position and is not meant as an exhaustive list. Assignments may differ for individuals within the same role based on business conditions, departmental need or geographic location.