Vonage Applications:

Our Applications business unit focuses on delivering a suite of advanced communication tools designed to enhance customer engagement. From cloud contact centers to feature-rich unified communications solutions, our Applications team is dedicated to providing businesses with the tools they need to streamline operations and improve customer experiences.

Why this role matters:

Join our growing group at Vonage, where we build cutting-edge web applications that power real-time communication experiences used by people every day. We're a diverse team passionate about technology and innovation — and a place where many of today's team leads and architects started out as developers, just like you.

Our team sits at the heart of Vonage's product, developing communication solutions deployed across multiple platforms. We build modern, responsive, high-performance front-end applications that handle real-time events at scale — work that directly shapes how businesses and their customers connect. What we do matters: every feature we ship improves the experience of thousands of users relying on Vonage to communicate.

We collaborate closely with designers, product managers, and engineers across the company, and we genuinely value creativity, collaboration, and having fun along the way.

Your key responsibilities:

You’ll lead front-end development for large-scale, real-time applications. You’ll design and implement intuitive, reliable, and performant user interfaces, working end-to-end with designers and backend teams. You’ll help define front-end best practices, mentor others, and drive technical decisions to keep our stack modern and maintainable.

Main tech stack:
Vue.js, JavaScript, TypeScript, Node.js, NestJS, Java, AWS, K8s, SQL

What you'll bring

Required:

• 4+ years of front-end or full-stack development experience with strong focus on modern JavaScript and TypeScript
  
  
• Expertise in modern web frameworks - preferably Vue
  
  
• Solid understanding of responsive design and performance optimization
  
  
• Experience leading projects and mentoring developers
  
  
• Experience with CI/CD pipelines for automated testing and deployment
  
  
• Strong collaboration and communication skills

Experience we consider a plus:

• Familiarity with backend technologies (Node.js, microservices, cloud) is a plus

How you’ll benefit:

• Discretionary Time Off
• Private Medical Healthcare
  
• Pension scheme
  
• Ericsson support line
  
• Hybrid work
  
• Additional benefits and perks will be shared and discussed with you by the recruiter during the interview process
  #LI-KF1
  

Vonage Communications APIs 

As an emerging leader in the $10B+ communications API market, we empower global brands to connect better with their customers, employees, and partners through transformative communications experiences. For example, Vonage API solutions empower organizations to build their custom omnichannel communications structure. This allows them to reach and engage customers on their preferred schedule and channel - including voice, video, and messaging. Think of a rideshare service instantly connecting with customers, hospital staff conducting remote monitoring, customers verifying their identity before completing a purchase, AI virtual agents servicing customers around the clock, and much more.

Why this role matters:

We’re looking for a Full Stack Software Engineer to join our Connectors Engineering team and help enhance Vonage Connectors Collection.
As part of the team, you’ll contribute to both new feature development and production improvements, with a strong focus on quality, fault tolerance, and performance. You’ll gain hands-on experience with real-time communications and event-driven systems. 
Our Engineers work on an exciting mix of both greenfield and existing projects, giving them an opportunity to explore new technologies. You will develop both frontend and backend solutions, take part in enhancing our range of connectors and services. You will collaborate with the other team members, product manager and other teams to deliver world-class products across multiple platforms. You will embed AI assisted engineering into daily practice to accelerate delivery and enhance outcomes. Also you will proactively adopt emerging AI capabilities to improve workflows and shares best practices with the team.

What you'll bring

Required:

• TypeScript / Java coding skills, willingness to learn other languages and environments.
• Strong backend experience - TypeScript / Java
• Strong frontend experience - pure HTML/TypeScript/CSS.
• Excellent debugging and problem solving skills.
• Experience with Cloud technologies such as AWS, Kubernetes, Docker.
• Experience with automated testing frameworks and platforms.
• Good understanding of algorithms, data structures, memory management, and concurrency.
• DB knowledge.
• Source management (Git) / Agile development techniques.
• Effective remote collaboration and communication skills.

Experience we consider a plus:

• Familiarity in API design and/or SDK development.
• HubSpot integrations.
• Salesforce experience

How you’ll benefit:

• Medical Insurance
• Glasses Reimbursement
• Life Insurance  - Allianz Family
• Kafeteria - My Benefit
• Ericsson Care Line
• Discretionary Time Off (DTO)
• Volunteer Time (VTO)
• Additional benefits and perks will be shared and discussed with you by the recruiter during the interview process

#LI-YB1

What You Will Do

• Define and lead the performance engineering strategy across high-availability, cloud-native telecom platforms.
• Lead, train, and coordinate a distributed guild of SDETs across multiple feature teams, guiding them to build, maintain, and execute performance scripts (k6) within their fractional sprint capacity.
• Design, develop, and evolve scalable backend performance frameworks using k6, Python, Java, or TypeScript, focusing entirely on APIs, databases, and infrastructure.
• Implement and manage production traffic replay strategies (e.g., GoReplay) and complex multi-tenant test data generation to accurately recreate realistic production contention and load profiles.
• Own and drive performance, load, stress, endurance, scalability, and resilience testing, including chaos engineering practices (e.g., using AWS Fault Injection Simulator).
• Validate real-time communication systems, event-driven architectures (Kafka, RabbitMQ), and high-throughput distributed systems under production-like conditions.
• Integrate performance testing into CI/CD pipelines, enabling continuous performance validation, shift-left practices, and automated PR blocking for latency degradation.
• Leverage observability tooling (Grafana, CloudWatch, Coralogix, VictoriaMetrics, PMM) to monitor, analyse, and troubleshoot system performance.
• Establish performance benchmarks, SLAs, SLOs, and error budgets aligned with business and system requirements.
• Collaborate with architecture and data teams to identify bottlenecks, validate database architectures (e.g., MySQL, Tungsten), and present evidence-based investment proposals.
• Analyse and optimise performance across both legacy monolith systems (requiring integrated load testing) and modern microservices architectures.

What You Will Bring

• Proven experience mentoring and coordinating testing efforts across large, distributed engineering teams (e.g., conducting code reviews, guiding SDETs through framework adoption, and managing cross-team test schedules).
• Strong hands-on experience with AWS cloud services (EC2, ECS, RDS, API Gateway) with a focus on scalability and performance optimisation.
• Proven expertise in performance testing tools (specifically k6, along with JMeter or Gatling), including test design, execution, and analysis at scale.
• Hands-on experience with production traffic shadowing or replay tools (such as GoReplay).
• Deep experience testing distributed systems, message brokers (Kafka, RabbitMQ), microservices architectures, and high-volume, low-latency APIs.
• Solid backend programming and scripting skills in Python, Java, or TypeScript to build custom performance frameworks and tooling.
• Strong understanding of system design, concurrency, throughput, latency, and fault tolerance principles.
• Experience implementing performance testing within CI/CD pipelines (Jenkins, GitHub Actions) and enabling continuous performance feedback loops.
• Hands-on experience with observability and monitoring tools (Grafana, Coralogix, PMM) for performance analysis and diagnostics.
• Experience working within Agile environments and translating performance insights into actionable engineering outcomes.

Required

• Demonstrable hands-on experience in backend performance engineering and automation using Python, Java, or TypeScript.
• Proven track record of performance, scalability, and resilience testing in AWS-based cloud-native systems.
• Strong experience designing large-scale performance test strategies and leading QA/SDET teams to execute them.
• Deep understanding of API performance testing, integration testing, and system-level non-functional validation.
• Solid grasp of system architecture, distributed systems behaviour, and non-functional testing methodologies.
• Experience with observability, monitoring, and log analysis tools.
• Familiarity with RESTful APIs and event-driven systems.

Application Requirements

• Updated CV clearly demonstrating performance engineering leadership, cross-team coordination, AWS expertise, and backend automation frameworks.
• Summary of performance testing frameworks, tools (e.g., k6, GoReplay), and CI/CD methodologies implemented.
• Detailed examples of performance testing engagements (scale, environments, bottlenecks identified, business impact, improvements delivered).
• Evidence of driving performance strategy, mentoring QA/SDET teams, and influencing architecture.

#LI-KS1

Why this role matters:

We are looking for Software Engineers to work in the Call Center as a Service (CCaaS) Technology Team where you will be working on a global, multi-tenant, real-time service, with thousands of concurrent users. Your focus will be on developing the platform that directly enables and supports contact centre agents.

Your key responsibilities:

• Contribute to product improvement beyond code implementation by actively caring about the product and its users
• Create a performant, secure, scalable service that our customers will rave about
• Continuously improve and automate the monitoring and deployment of our cloud service

What you'll bring

Required:

• Bachelor’s degree in Computer Science, Electrical Engineering or related field/ or relevant experience
• Excellent communication skills, including writing, speaking and listening to effectively communicate with technical and non technical people
• 2+ years of relevant experience building Front End Applications
• Experience with TypeScript/JavaScript frameworks including Vue.js / React
• Knowledge about state management, e.g. experience with Pinia for centralized state
• Ability to build real-time applications; understanding of Web Sockets and REST API

Experience we consider a plus:

• 2+ years of relevant experience in full-stack development
• Knowledge of distributed system including messaging mechanism (Kafka / SNS)
• Experience with setting up and leveraging platform analytics, logging, and monitoring tools (e.g., Grafana, New Relic) to proactively identify and resolve production issues in real-time services.
• Ability to responsibly utilise AI tools to enhance development productivity and quality

How you’ll benefit:

• Local benefits
• Additional benefits and perks will be shared and discussed with you by the recruiter during the interview process

#LI-KS1

Vonage's Applications:

Our Applications business unit focuses on delivering a suite of advanced communication tools designed to enhance customer engagement. From cloud contact centers to feature-rich unified communications solutions, our Applications team is dedicated to providing businesses with the tools they need to streamline operations and improve customer experiences.

Why this role matters:

Vonage is looking for a hands-on SDET (Mid–Senior Level) to strengthen automation engineering across our modern microservices-based communications platform.
This role is deeply technical and delivery-focused. You will design and implement scalable automation solutions across UI, API, performance, and mobile layers, ensuring quality is embedded throughout the SDLC.

As part of the QA Centre of Excellence (QA COE), you will collaborate with engineering squads to build reliable, CI/CD-ready automation frameworks and promote best practices in BDD, microservices testing, and observability.

Your key responsibilities:

What you'll bring

Required:

• 5–8 years of experience in automation engineering or SDET roles.
• Strong hands-on experience with: Playwright (TypeScript), API automation (REST/GraphQL) and BDD frameworks (Cucumber/Gherkin)
• Experience working within AWS-based environments.
• Strong understanding of distributed systems, microservices testing.
• Experience integrating automation into CI/CD pipelines.
• Working knowledge of performance testing with K6.
• Strong coding, debugging, and analytical skills.
• Experience collaborating within cross-functional Agile teams.

Experience we consider a plus:

• Experience with Docker, Kubernetes, or EKS.
• Familiarity with contract testing tools.
• Exposure to telecom or communications platforms.
• Mobile automation experience with Appium.
• Experience contributing to shared, cross-team automation frameworks.

How you’ll benefit:

• Discretionary Time Off
• Private Medical Healthcare
• Pension scheme
• Ericsson support line
• Hybrid work
• Additional benefits and perks will be shared and discussed with you by the recruiter during the interview process

#LI-KS

Junior Frontend Engineer- Swagger Functional Testing

• Build well-designed, clean applications with solid technical foundations and a passion for frontend technologies.
• Gaining exposure to cutting-edge development technology.
• Tech stack: JavaScript/TypeScript, Vue.js, Pinia, Node.js, HTML, CSS, REST APIs, Docker

Product intro:

Swagger sets the standard for API design, testing, and governance in the age of AI. It automates and centralizes visibility, governance, and discoverability, while AI-assisted building, testing, and documentation help teams deliver faster, operate predictably, and scale with confidence.

Go to our product page if you want to know more about Swagger
You can even have a free trial to check it out 😊

About the role:

As a Junior Frontend Engineer, you will be working with internal teams around the globe to build one of the world's best solutions for API functional testing. You can look forward to working with our best and brightest engineers, product managers, and UX folks.

• Ensure development in accordance with software engineering and UX best practices, helping to define and champion development standards for the team.
• Single Page Application development using Vue.js and Pinia for state management, along with other cutting-edge frameworks & libraries.
• Drive high engineering standards engaging in peer design and code reviews, grooming sessions, etc.
• Build and maintain robust unit tests to ensure code quality and reliability.
• Implement accessible, user-friendly interfaces that meet modern web standards.
• Create and maintain technical and support documentation.
• Collaborate with teams of developers, testers, UX designers, and product managers geographically spread across our different locations.

We are looking for you if you have:

• 1+ years working with web-based technologies: JavaScript/TypeScript, HTML, CSS.
• Experience with Vue.js and modern state management solutions (Pinia or similar).
• Experience with Node.js.
• Experience integrating with REST APIs.
• Proven ability to implement pixel-perfect UI designs cross-browser (CSS3, pre-processors).
• Experience with Figma or other design collaboration tools.
• English on at least B2 level.

Nice to have:

• Knowledge of other frontend frameworks such as React or Angular.
• Familiarity with AI-assisted coding tools (GitHub Copilot, Claude Code, etc.).
• Knowledge of implementing accessibility (A11y) standards (WCAG, ARIA).
• Experience with CI/CD pipelines and automated deployment processes.
• Exposure to backend technologies such as Scala.

Why you should join the SmartBear crew:

• You can grow your career at every level.
• We invest in your success as well as the spaces where our teams come together to work, collaborate, and have fun.
• We love celebrating our SmartBears; we even encourage our crew to take their birthdays off.
• We are guided by a People and Culture organization - an important distinction for us. We think about our team holistically -- the whole person.
• We celebrate our differences in experiences, viewpoints, and identities because we know it leads to better outcomes.

Did you know?

• Our main goal at SmartBear is to make our technology-driven world a better place.
• SmartBear is committed to ethical corporate practices and social responsibility, promoting good in all the communities we serve.
• SmartBear is headquartered in Somerville, MA with offices across the world including Galway Ireland, Bath, UK, Wroclaw, Poland and Bangalore, India.
• We've won major industry (product and company) awards including B2B Innovators Award, Content Marketing Association, IntellyX Digital Innovator and BuiltIn Best Places to Work.

SmartBear is committed to creating an inclusive workplace for employees where all individuals are treated with respect and dignity. We are an equal opportunity employer and make employment decisions based on merit, qualifications, and business needs. We do not discriminate on the basis of race, color, religion, sex, national origin, age, gender, disability, veteran status, sexual orientation, or any other protected status under applicable laws. We are dedicated to fostering a workplace that reflects a diversity of thought and experience as well as our values of being smart, open, driven, accountable, and curious.

#LI-AJ1

About the role

As a Senior Fullstack Developer, you will play a key role in the design, development, and maintenance of our web applications using ReactJS and .NET. You will be responsible for driving technical decisions, mentoring team members, and ensuring the architectural integrity of our solutions. This role requires deep technical expertise, strong problem-solving skills, and the ability to work across teams to deliver high-impact solutions. 

This role is ideal for someone who thrives in a fast-paced environment, enjoys mentoring others, and takes initiative in driving technical excellence.

Salary range for this role: 15,500- 21,000 PLN gross/ month
This role is based in Wroclaw.

What will you be doing?

• Design, develop, and maintain scalable web applications using React and .NET.
• Lead technical discussions and contribute to architectural decisions.
• Optimize web applications for performance, scalability, and security.
• Mentor and support junior developers, fostering a culture of learning and growth.
• Collaborate with cross-functional teams, including Product, UX/UI, and DevOps, to drive innovation and best practices.
• Conduct and oversee code reviews, ensuring adherence to best practices and high-quality standards.
• Troubleshoot and resolve complex issues across the full stack.
• Stay updated with industry trends and proactively introduce improvements.

What are we looking for?

• 5+ years of experience in web application development with React and .NET (in total).
• Deep understanding of JavaScript (ES6+), TypeScript, and modern front-end frameworks.
• Strong expertise in designing and integrating RESTful APIs.
• Proven experience in architectural decision-making and system design.
• Experience with source control systems and branching strategies (e.g., Git).
• Proficiency in testing frameworks such as Jest, React Testing Library, or Playwright.
• Strong ability to communicate complex technical concepts to both technical and non-technical stakeholders.
• Self-driven with a proactive approach to problem-solving.

What will make you stand out?

• Bachelor's degree in Computer Science or a related field.
• Experience with AWS services and cloud architecture.
• Knowledge of modern build tools and deployment strategies.
• Familiarity with DevOps practices and CI/CD pipelines.

Tech Stack

• React, JavaScript (ES6+), TypeScript
• C# .Net
• Amazon Web Services
• SQL Server

What do we offer?

About the role

As a Senior Fullstack Developer, you will play a key role in the design, development, and maintenance of our web applications using ReactJS and .NET. You will be responsible for driving technical decisions, mentoring team members, and ensuring the architectural integrity of our solutions. This role requires deep technical expertise, strong problem-solving skills, and the ability to work across teams to deliver high-impact solutions. 

This role is ideal for someone who thrives in a fast-paced environment, enjoys mentoring others, and takes initiative in driving technical excellence.

Salary range for this role: 15,500- 21,000 PLN gross/ month
This role is based in Wroclaw.

What will you be doing?

• Design, develop, and maintain scalable web applications using React and .NET.
• Lead technical discussions and contribute to architectural decisions.
• Optimize web applications for performance, scalability, and security.
• Mentor and support junior developers, fostering a culture of learning and growth.
• Collaborate with cross-functional teams, including Product, UX/UI, and DevOps, to drive innovation and best practices.
• Conduct and oversee code reviews, ensuring adherence to best practices and high-quality standards.
• Troubleshoot and resolve complex issues across the full stack.
• Stay updated with industry trends and proactively introduce improvements.

What are we looking for?

• 5+ years of experience in web application development with React and .NET (in total).
• Deep understanding of JavaScript (ES6+), TypeScript, and modern front-end frameworks.
• Strong expertise in designing and integrating RESTful APIs.
• Proven experience in architectural decision-making and system design.
• Experience with source control systems and branching strategies (e.g., Git).
• Proficiency in testing frameworks such as Jest, React Testing Library, or Playwright.
• Strong ability to communicate complex technical concepts to both technical and non-technical stakeholders.
• Self-driven with a proactive approach to problem-solving.

What will make you stand out?

• Bachelor's degree in Computer Science or a related field.
• Experience with AWS services and cloud architecture.
• Knowledge of modern build tools and deployment strategies.
• Familiarity with DevOps practices and CI/CD pipelines.

Tech Stack

• React, JavaScript (ES6+), TypeScript
• C# .Net
• Amazon Web Services
• SQL Server

What do we offer?