Full Stack JavaScript Engineer

Job Description Ciklum is looking for a Full Stack JavaScript Engineer to join our team full-time in Poland. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About The Role As a Full Stack JavaScript Engineer, become a part of a cross-functional development team engineering experiences of tomorrow to join our team and work directly with our partner, a leading global provider of credential security and password management solutions. Ciklum is looking for a JavaScript Developer (Frontend-Oriented) to join our team and work directly with our partner, a leading global provider of credential security and password management solutions. Our partner's mission is to deliver the credential security every business and employee needs to thrive. Millions of consumers and over 25,000 enterprise clients worldwide trust their platform for industry-leading innovations, zero-knowledge security, and an unmatched user experience. The work we do together directly impacts millions of digital identities by optimizing product experiences, trial flows, and global customer onboarding ecosystems. In this role, you will be fully integrated into our partner's product development engineering teams. You will work alongside Product Managers, Product Designers, Engineering Managers, and Backend Engineers to drive business growth. Your focus will center on key customer touchpoints—including plans and pricing strategy, trial and payment experiences, and user onboarding flows. Responsibilities Collaborative Development: Partner closely with Product Managers, Product Designers, and Quality Engineering teams to discover creative solutions that fuel growth within an agile environmentEnd-to-End Execution: Deliver high-quality frontend features - writing clean, maintainable TypeScript and React code, building automated tests, and deploying user-facing applicationsGrowth & Monetization Initiatives: Drive features that directly impact company trajectory, such as optimizing payment experiences, evolving pricing strategies, and refining user onboardingFrontend Excellence & Quality: Maintain robust testing strategies (using Jest, WebdriverIO, Cucumber) and leverage code quality tooling (ESLint, SonarQube) to ensure high reliability and securityKnowledge Sharing & Innovation: Continuously learn, participate in cross-team efficiency initiatives, and share technical knowledge across the engineering organization Requirements Experience: 4+ years of overall software development experience, with at least 3+ years focused on JavaScript/TypeScript and modern frontend frameworks (React)Core Tech Stack: Strong, hands-on proficiency in TypeScript, JavaScript, and ReactQuality & Testing: Proven experience writing maintainable code with unit and integration testing frameworks (e.g., Jest, Karma, WebdriverIO, Cucumber)AI Fluency: Comfortable leveraging personal AI coding platforms (e.g., Claude Code, GitHub Copilot) to streamline everyday development tasks and accelerate delivery velocityAI Feature Building: Experience building with AI in product features (e.g., inference orchestration, model evaluation, workflow integrations, RAG)Business Focus: Ability to make technical decisions balanced with product needs and business outcomesCommunication: Strong commitment to application quality, security, and collaborative teamwork, with fluent English skills for working in an international environment Desirable Reactive Programming: Familiarity with RxJS or complex state management patternsBackend Knowledge: Experience with Node.js and RESTful APIs (helpful for cross-functional collaboration and fullstack integration)Product Mindset: experience working within a product-focused companyBuild & DevOps Tools: Experience with Webpack, PNPM, GitLab CI, and observability tools (ELK stack, Datadog, Tableau)Coordination & Leadership: Planning and estimating work, communicating progress, and managing project dependenciesDomain Experience: Background in SaaS subscription/checkout flows, identity management, or security platforms What’s in it for you? Strong community: Work alongside top professionals in a friendly, open-door environmentGrowth focus: Take on large-scale projects with a global impact and expand your expertiseTailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certificationsEndless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologiesFlexibility: Enjoy flexibility – full remote working possibilitiesCare: We've got you covered with company-paid premium medical package through LuxmedBenefits: Access the MyBenefit cafeteria platform, allowing you to choose perks that best suit your lifestyle and needs About Us At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.