Middle Fullstack Engineer (Kotlin&React)

Posted Yesterday
Be an Early Applicant
Hiring Remotely in Poland
Remote
Mid level
Artificial Intelligence • Cloud • Information Technology • Software • Consulting • Data Privacy
The Role
Develop and enhance Java and Kotlin microservices, REST APIs, backend mocks, and React web components. Build purchase and registration flows, integrate external partner systems, and contribute across frontend and backend development. Collaborate with teams to deliver features and improve technical solutions. The role requires commercial software development experience, strong Java/Kotlin and React skills, REST and JSON knowledge, AI-assisted development experience, English and Polish proficiency, and occasional Warsaw office visits.
Summary Generated by Built In

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions. 

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.  

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, InPost, and many, many more. We work with leading technologies including AWS, Azure, GCP, Databricks, and Snowflake, and combine strong engineering culture with a consulting mindset and a continuous focus on growth and knowledge sharing. 



You will be:
  • developing and enhancing microservices using Java and Kotlin,
  • designing, developing, and modifying REST APIs and backend mocks,
  • building web components, purchase flows, and registration processes using React,
  • working across both backend and frontend areas, adapting to changing project needs,
  • integrating solutions with external business partners and supporting partner-facing functionalities,
  • collaborating with the team to deliver new features quickly and efficiently,
  • contributing to the continuous improvement of the product and technical solutions.


Your profile:
  • 3+ years of commercial experience in software development,
  • good knowledge of Java and Kotlin,
  • practical experience working with microservice architecture,
  • hands-on experience with React and modern JavaScript,
  • good knowledge of HTML and CSS,
  • solid understanding of REST API design and consumption,
  • practical experience working with JSON,
  • willingness to work across both backend and frontend development,
  • practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery,
  • ability to quickly switch between different technological areas and tasks,
  • good communication and collaboration skills,
  • English at min. B2 level,
  • Polish at min. B1 level,
  • openness to occasional visits to the Warsaw office (1-2 days per quarter).

  • Work from the European Union region and a work permit are required.

Nice to have:
  • experience with Docker and CI/CD processes, particularly GitLab CI,
  • experience working with cloud environments,
  • understanding of UX/UI principles,
  • familiarity with Responsive Web Design (RWD),
  • experience integrating with external partner systems,
  • experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work,
  • interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches.


Recruitment Process:

CV review – HR call – Technical Interview – Client Interview – Decision


Skills Required

  • 3+ years of commercial software development experience
  • Good knowledge of Java and Kotlin
  • Practical experience with microservice architecture
  • Hands-on experience with React and modern JavaScript
  • Good knowledge of HTML and CSS
  • Solid understanding of REST API design and consumption
  • Practical experience working with JSON
  • Willingness to work across backend and frontend development
  • Practical experience using AI-powered assistants such as Claude Code, GitHub Copilot, or Cursor
  • Ability to switch between technological areas and tasks
  • Good communication and collaboration skills
  • English proficiency at minimum B2 level
  • Polish proficiency at minimum B1 level
  • Openness to occasional Warsaw office visits, 1–2 days per quarter
  • Work from the European Union region
  • Valid work permit
  • Experience with Docker and CI/CD, particularly GitLab CI
  • Experience working with cloud environments
  • Understanding of UX/UI principles
  • Familiarity with Responsive Web Design
  • Experience integrating external partner systems
  • Experience applying GenAI within the software development lifecycle
  • Familiarity with AI-driven practices, agent-based workflows, and automation patterns

Xebia Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Xebia and has not been reviewed or approved by Xebia.

  • Healthcare Strength U.S. offerings include health, dental, and vision insurance alongside an Employee Assistance Program, strengthening total compensation where available.
  • Leave & Time Off Breadth Vacation/PTO and paid holidays, with mentions of parental leave in certain regions, broaden time-off options and support work-life balance.
  • Retirement Support A U.S. 401(k) plan with matching is noted, enhancing long-term financial benefits as part of total rewards.

Xebia Insights

Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: Atlanta
3,254 Employees
Year Founded: 2001

What We Do

We are a pioneering IT consultancy company, following 1 mission, 4 values, and 4 business principles. WHO WE ARE With over 20 years of experience, our global network of passionate technologists and pioneering craftsmen deliver cutting-edge technology and game-changing consulting to companies on the brink of transformation. Founded in 2001, Xebia was the first Dutch organization to embrace the Agile way of working, with gurus like Jeff Sutherland. Since then, we have grown from a Java company into a full-service digital consulting company with 4500+ professionals working on a worldwide ambition. We are organized in complementary chapters – teams with a tremendous amount of knowledge and experience within a particular field, such as Agile, DevOps, Data and AI, Cloud, Software Technology, Low Code, and Microsoft. We help the world’s top 250 companies and category leaders overcome digital challenges, embrace innovation, adopt new technology, and implement new business models. In addition to high-quality consulting, we also provide offshoring and nearshoring services. WHAT WE DO ★ Digital Strategy ★ DevOps and SRE ★ Agile ★ Data and AI ★ Cloud ★ Microsoft Solutions ★ Software Technology ★ Security ★ Low Code ★ Xebia Academy HOW WE ARE ORGANIZED Xebia has launched specific labels, like GoDataDriven, Binx, Xpirit, Qxperts, Stackstate, Instruqt, Xccelerated, and Xebia Academy Complementing our organic growth, other specialized companies join our successful journey and also operate within the Xebia network under their own brand name, like Appcino, coMakeIt, g-company, Oblivion, PGS Software, and SwissQ. Together we are Xebia. With 17 offices in Atlanta, San Francisco, UK, Vietnam, Canada, Amsterdam, and Hilversum (the Netherlands), Belgium, Germany, Gurgaon, Jaipur, Hyderabad, Pune, Bangalore, Poland, Melbourne, Mexico, and Dubai. ✉️ [email protected]

Similar Jobs

Remote
25 Locations
393 Employees
179K-179K Annually

Pfizer Logo Pfizer

Audit Lead

Artificial Intelligence • Healthtech • Machine Learning • Natural Language Processing • Biotech • Pharmaceutical
Remote
29 Locations
121990 Employees
163K-272K Annually

Dynatrace Logo Dynatrace

Account Manager

Artificial Intelligence • Big Data • Cloud • Information Technology • Software • Big Data Analytics • Automation
Remote or Hybrid
Warsaw, Warszawa, Mazowieckie, POL
5600 Employees
Remote
Poland
972 Employees
218K-300K Annually

Similar Companies Hiring

Golden Pet Brands Thumbnail
Digital Media • eCommerce • Information Technology • Marketing Tech • Pet • Retail • Social Media
El Segundo, California
178 Employees
Kepler  Thumbnail
Fintech • Software
New York, New York
6 Employees
Onshore Thumbnail
Artificial Intelligence • Fintech • Software • Financial Services
New York, New York
60 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account