{"id":7533,"date":"2026-07-30T13:43:53","date_gmt":"2026-07-30T11:43:53","guid":{"rendered":"https:\/\/itds.pl\/it-jobs\/senior-fullstack-engineer-cloud-and-data-driven-microservices\/"},"modified":"2026-07-30T13:47:33","modified_gmt":"2026-07-30T11:47:33","slug":"senior-fullstack-engineer-react-and-kotlin-specialists","status":"publish","type":"matador-job-listings","link":"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-engineer-react-and-kotlin-specialists\/","title":{"rendered":"Senior Fullstack Engineer \u2013 React and Kotlin Specialists"},"content":{"rendered":"<p><strong>Unleash innovation \u2014 design the future of intelligent advertising ecosystems!<\/strong><br \/> Warszawa-based opportunity with hybrid work model.<\/p> <p>As a <strong>Senior Fullstack Engineer \u2013 React and Kotlin Specialists<\/strong>, you will be working for our client, a leader in building advanced advertising tools, focusing on creating intelligent recommendation systems and automating campaign management for advertisers on Allegro Ads. Join a mission-driven project that revolutionizes how businesses grow through cutting-edge technology and data-driven insights, offering exciting avenues for professional growth and innovation.<\/p> <p><strong>Your main responsibilities:<\/strong><\/p> <ul> <li>Develop and maintain backend services using Kotlin, integrating machine learning-driven recommendation engines in collaboration with data science teams.<\/li> <li>Build scalable, event-driven architectures to process large data volumes within cloud environments, leveraging GCP.<\/li> <li>Design and implement high-performance APIs to support analytical dashboards and market benchmarks.<\/li> <li>Create and optimize scalable microfrontends using React, prioritizing accessibility and server-side rendering for analytical tools.<\/li> <li>Collaborate with cross-functional teams to deliver seamless, secure, and efficient software solutions.<\/li> <li>Ensure high code quality through testing frameworks such as Jest, Vitest, or Playwright, with a focus on performance and reliability.<\/li> <li>Contribute to evolving microservice architectures, utilizing Spring Boot, MongoDB, SQL, and cloud-native tools.<\/li> <li>Participate actively in code reviews, sprint planning, and technical discussions to foster continuous improvement.<\/li> <\/ul> <p><strong>You&#8217;re ideal for this role if you have:<\/strong><\/p> <ul> <li>At least 3 years of experience in full-stack development, with a focus on React and Kotlin.<\/li> <li>Strong proficiency in TypeScript, React, HTML\/CSS, and backend technologies like Kotlin, Spring Boot, and microservices.<\/li> <li>Experience working with cloud ecosystems, preferably GCP.<\/li> <li>Solid understanding of database management, including MongoDB and SQL.<\/li> <li>Familiarity with event-driven architectures and large-scale data processing.<\/li> <li>Ability to communicate effectively in Polish and English.<\/li> <li>Experience working in an Agile environment with a focus on delivering high-quality software.<\/li> <\/ul> <p><strong>It is a strong plus if you have: (optional)<\/strong><\/p> <ul> <li>Certifications related to GCP or microservices architecture.<\/li> <li>Experience with agentic coding tools like Copilot\/OpenCode.<\/li> <li>Knowledge of accessibility standards (a11y) and performance optimization techniques.<\/li> <\/ul> <p><strong>Language Required for the role:<\/strong><\/p> <ul> <li>Polish (Communicative)<\/li> <li>English (Communicative)<\/li> <\/ul> <p><strong>Eligibility for this role:<\/strong><\/p> <ul> <li>Only candidates with an existing legal right to work in the European Union will be considered for this role.<\/li> <\/ul> <p><strong>#MAKEYourCareerBETTER<\/strong><br \/> Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.<\/p> <nav class=\"matador-job-navigation\"> <ul> <li> <a href=\"https:\/\/itds.pl\/pl\/?wpid=7533&#038;bhid=9046\" rel=\"button\" class=\"matador-button\" title=\"Apply Now\">Apply Now<\/a> <\/li> <li> <a href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-engineer-react-and-kotlin-specialists\/\" rel=\"button\" class=\"matador-button matador-button-secondary\" title=\"More Info\">More Info<\/a> <\/li> <\/ul> <\/nav> ","protected":false},"excerpt":{"rendered":"<p>Unleash innovation \u2014 design the future of intelligent advertising ecosystems! Warszawa-based opportunity with hybrid work model. As a Senior Fullstack Engineer \u2013 React and Kotlin Specialists, you will be working for our client, a leader in building advanced advertising tools, focusing on creating intelligent recommendation systems and automating campaign management for advertisers on Allegro Ads. &hellip; <a href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-engineer-react-and-kotlin-specialists\/\">Continued<\/a><\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_matador_source_id":"9046"},"matador-categories":[],"matador-locations":[29],"matador-types":[25],"matador-remote-job-possible":[254],"matador-skills":[183],"matador-seniority":[1593,177],"matador-position":[],"matador-technology":[792,935,1248,776,728,821,948,781,703,709,1027],"matador-contract-type":[402],"matador-priority":[286],"matador-language":[179,178],"matador-place":[437],"matador-visibility":[704],"matador-choose-website-to-publis":[449],"class_list":["post-7533","matador-job-listings","type-matador-job-listings","status-publish","hentry","matador-locations-warsaw","matador-types-contract","matador-remote-job-possible-remote","matador-skills-developer","matador-seniority-mid-level","matador-seniority-senior","matador-technology-gcp","matador-technology-jest","matador-technology-kotlin","matador-technology-microservices","matador-technology-mongodb","matador-technology-playwright","matador-technology-react","matador-technology-spring-boot","matador-technology-sql","matador-technology-typescript","matador-technology-vitest","matador-contract-type-b2b","matador-priority-1-high","matador-language-english","matador-language-polish","matador-place-warszawa","matador-visibility-online","matador-choose-website-to-publis-poland"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Senior Fullstack Engineer \u2013 React and Kotlin Specialists | ITDS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-engineer-react-and-kotlin-specialists\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Senior Fullstack Engineer \u2013 React and Kotlin Specialists | ITDS\" \/>\n<meta property=\"og:description\" content=\"Unleash innovation \u2014 design the future of intelligent advertising ecosystems! 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