Frontend Engineer

🏢 Summary: Frontend-focused role developing and maintaining scalable React applications with TypeScript, integrated with Node.js backend services and data pipelines. The position involves building production-grade, data-driven solutions, contributing to architecture decisions, and optimizing complex UI workflows. It offers work on a high-impact product within a modern TypeScript and React ecosystem. 🗂️ Requirements: Strong proficiency in React, Strong proficiency in TypeScript, Experience building large-scale production applications, Experience with Node.js and API integrations, Experience with data-driven applications, Understanding of modern frontend architecture, Knowledge of testing practices, Ability to work in cross-functional teams 📃 Skills: React, TypeScript, Node.js, APIs, Microservices, Snowflake, Testing, Architecture, Data, Pipelines 🏢 Description: ✅ Your responsibilities: Develop and maintain scalable React applications with TypeScript across the full frontend stack Collaborate closely with backend engineers, data teams, and product managers to deliver high-quality solutions Ensure type safety, code quality, and maintainability throughout the application Participate in design and architecture discussions, proposing improvements to frontend patterns and integrations Troubleshoot and optimize complex UI and data-intensive workflows Support knowledge sharing and mentor junior developers when needed 🧠 Our requirements: Strong proficiency in React and TypeScript , with experience building large-scale, production-grade applications Familiarity with Node.js backend development and integration with APIs or microservices Experience working with data-driven applications , ideally with Snowflake, data lakes, or pipelines Solid understanding of modern frontend architecture, testing, and best practices Ability to communicate effectively in a cross-functional, high-stakes environment Proactive, self-motivated, and capable of delivering high-quality solutions under tight timelines 🌟 What we offer: Opportunity to work on a premium, high-profile product with global business impact Exposure to a modern TypeScript/React ecosystem, integrated with backend Node.js services and advanced data pipelines Collaborative environment with experienced engineers and product leaders Career growth and technical mentorship in a cross-functional team Competitive employment package and benefits.

🏢 Summary: Senior Frontend Developer role focused on designing, building, testing, deploying, and maintaining a React and TypeScript-based frontend system integrated with backend services and mobile apps. The position involves frontend architecture design, production support, and working within Agile teams to deliver scalable solutions used across multiple countries. 🗂️ Requirements: 5+ years of production experience with React, Strong hands-on experience with TypeScript, Strong understanding of software engineering principles, Experience with testing and design systems, Knowledge of REST APIs, Familiarity with DBMS such as PostgreSQL or DynamoDB, Degree in Computer Science, Experience working with Agile methodologies (SCRUM or Kanban), Experience using AI tooling 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, REST, PostgreSQL, DynamoDB, Testing, DesignSystems, Agile, SCRUM, Kanban, AI 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in React & TypeScript Design frontend software architecture with connection to backend services and mobile apps Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in React Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST APIs Familiarity with DBMS like PostgreSQL, DynamoDB Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

🏢 Summary: Frontend Developer role focused on designing, developing, testing, deploying, and maintaining React and TypeScript applications used across multiple European markets. The position involves working with modern frontend technologies, integrating with REST/GraphQL APIs, and supporting production systems. The role requires strong software engineering expertise and collaboration within Agile teams. 🗂️ Requirements: 5+ years of production experience with React, Strong proficiency in TypeScript, Strong understanding of software engineering principles, Experience with testing and design systems, Experience with REST APIs, Experience with GraphQL APIs, Familiarity with PostgreSQL or DynamoDB, Computer Science degree, Experience with AI tooling, Experience working in Agile (SCRUM or Kanban) environments 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST, GraphQL, AWS, Terraform, PostgreSQL, DynamoDB, Docker, Kubernetes, Jenkins, CircleCI, GitlabCI, Datadog 🏢 Description: About the role You will need to be an expert in frontend development with a thorough understanding of the technologies involved. Strong frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: React, TypeScript, JavaScript, HTML, CSS, Cypress, Playwright, Node.js, REST/GraphQL APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a frontend system written in React & TypeScript Deploying and maintaining frontend / backend applications Maintaining system on production used by consumers from several European countries Debugging issues Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Required qualifications: 5+ years of production software development experience in React Strong understanding of software engineering principles, testing, design systems Solid hands-on experience in TypeScript Know-how of REST/GraphQL APIs Familiarity with DBMS like PostgreSQL, DynamoDB Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to backend development (can be in TypeScript) Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

🏢 Summary: Senior Frontend Developer role focused on designing, developing and maintaining web applications using React and TypeScript, with close integration to REST APIs. The position involves performance optimization, code quality assurance, and adherence to security and W3C standards. The role also includes managing build processes and collaborating on technical solution design. 🗂️ Requirements: Higher education in Computer Science or related field, Minimum 5 years of commercial experience in web application development, Very good knowledge of JavaScript (ES6/ES7), Very good knowledge of TypeScript, Very good knowledge of HTML5, Very good knowledge of CSS3, Experience with React (Redux, Saga), Experience with Node.js, Experience with NPM, Experience with Bootstrap, Experience with jQuery, Experience with Webpack, Experience with Gulp or Grunt, Experience with SASS or LESS, Knowledge of OOP design patterns, Knowledge of OWASP Top 10, Experience with REST API integration, Knowledge of W3C standards, Ability to optimize web application performance, Experience with Git, English proficiency for working with technical documentation 📃 Skills: JavaScript, TypeScript, HTML5, CSS3, React, Redux, Saga, Node.js, NPM, Bootstrap, jQuery, Webpack, Gulp, Grunt, SASS, LESS, OOP, OWASP, REST, W3C, Git, ES6, ES7 🏢 Description: Twój zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji webowych (frontend + integracje) Tworzenie nowych funkcjonalności w oparciu o React oraz TypeScript Współpraca z zespołem backendowym przy integracji REST API Dbanie o jakość kodu (code review, stosowanie dobrych praktyk i wzorców projektowych) Optymalizacja wydajności aplikacji oraz poprawa UX/UI Utrzymanie zgodności ze standardami W3C oraz zasadami bezpieczeństwa (OWASP Top 10) Udział w analizie wymagań i projektowaniu rozwiązań technicznych Zarządzanie zależnościami i procesem budowania aplikacji (Webpack, Gulp/Grunt) Praca z systemem kontroli wersji Git Nasze wymagania Wykształcenie wyższe (preferowane kierunki informatyczne lub pokrewne) Minimum 5 lat doświadczenia komercyjnego w tworzeniu aplikacji webowych Bardzo dobra znajomość: JavaScript (ES6/ES7), TypeScript, HTML5, CSS3 Doświadczenie w pracy z: React (Redux, Saga), Node.js, NPM, Bootstrap, jQuery, Webpack oraz, Gulp/Grunt, Preprocesorami CSS (SASS/LESS) Znajomość wzorców projektowych (OOP) Znajomość zagadnień bezpieczeństwa aplikacji (OWASP Top 10) Doświadczenie w pracy z REST API Znajomość standardów W3C Umiejętność optymalizacji wydajności aplikacji Znajomość systemu kontroli wersji Git Znajomość języka angielskiego na poziomie umożliwiającym pracę z dokumentacją techniczną Mile widziane Doświadczenie w pracy w metodykach Agile/Scrum Znajomość narzędzi do lintowania (TSlint/JSLint) i dbałość o jakość kodu Doświadczenie w pracy z dużymi aplikacjami frontendowymi (SPA) Umiejętność pisania testów jednostkowych i integracyjnych Znajomość CI/CD Doświadczenie w pracy z nowoczesnymi narzędziami developerskimi i automatyzacją buildów Zainteresowanie nowymi technologiami frontendowymi i trendami

🏢 Summary: Fullstack engineering role focused on designing, developing, deploying, and maintaining backend services in TypeScript and frontend applications in React. The position involves building and operating microservices in AWS using Terraform, ensuring production stability, and contributing to architecture and feature planning. You will work in an Agile environment with strong emphasis on code quality, testing, and CI/CD practices. 🗂️ Requirements: 5+ years fullstack production experience, Strong TypeScript or C# experience, Experience with React development, Knowledge of PostgreSQL or DynamoDB, Experience building and consuming REST APIs, Hands-on experience with CICD pipelines, Understanding of data structures and algorithms, Knowledge of OOP, SOLID and CleanCode principles, Experience with AWS and infrastructure as code, Computer Science degree, Experience with Scrum or Kanban 📃 Skills: TypeScript, JavaScript, NodeJS, React, REST, AWS, Terraform, CSharp, PostgreSQL, DynamoDB, CICD, Docker, Kubernetes, Jenkins, CircleCI, GitLabCI, Datadog, Microservices, SOLID, CleanCode, OOP, Algorithms, DataStructures, Scrum, Kanban 🏢 Description: About the role You will need to be an expert in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with:Typescript, JavaScript, Node.js, React, REST APIs, React, AWS, Terraform, C# Responsibilities: Designing, writing, testing functionalities for a backend system written in TypeScript and a frontend system written in React & TypeScript Deploying and maintaining microservices in AWS using Terraform Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Recruiting and mentoring team members Collaborating with other team members and teams that depend on the functionalities that you develop Required qualifications: 5+ years of production software development experience in a fullstack role Strong understanding of software engineering principles, testing, data structures and algorithms Solid hands-on experience in technologies such as Typescript or C# Strong knowledge of DBMS like PostgreSQL, DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency of OO design patterns, SOLID principles and Clean Code Computer Science degree Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc. Working experience with one of the object-oriented and/or functional languages such as C#, Elixir, C++, Java, Golang, Erlang, Python, Kotlin

🏢 Summary: Frontend Developer role focused on building and maintaining modern web applications using React.js. The position involves creating responsive, user-centered interfaces, integrating RESTful APIs, and delivering scalable, maintainable frontend solutions. Emphasis is placed on performance, accessibility, and clean code standards. 🗂️ Requirements: 3–4+ years commercial frontend development experience, Strong hands-on experience with React.js, Proficiency in modern JavaScript (ES6+), Solid knowledge of HTML5 and CSS3, Experience with responsive design principles, Experience integrating RESTful APIs, Understanding of UI/UX best practices, Familiarity with state management, Experience with component-based architecture, Experience with Git and collaborative workflows, Ability to write scalable and maintainable code, Strong debugging and problem-solving skills 📃 Skills: React, JavaScript, ES6, HTML5, CSS3, REST, API, Git, UI, UX 🏢 Description: Responsibilities Develop and maintain modern web applications using React.js . Create responsive and intuitive user interfaces with a strong focus on usability and user experience. Connect frontend applications with RESTful APIs and backend systems. Translate business and design requirements into scalable frontend solutions. Write clean, reusable, and maintainable code following frontend development standards. Collaborate closely with designers, product owners, and backend engineers. Optimize application performance, accessibility, and cross-browser compatibility. Requirements 3–4+ years of commercial experience in frontend development. Strong hands-on experience with React.js and modern JavaScript (ES6+). Solid knowledge of HTML5, CSS3, and responsive design principles. Experience integrating APIs and working with backend services. Understanding of UI/UX best practices and user-centered design. Familiarity with state management and component-based architecture. Experience with Git and collaborative development workflows. Ability to write efficient, scalable, and well-structured frontend code. Strong problem-solving and debugging skills.

🏢 Summary: Senior-level role focused on building and maintaining scalable, data-driven web applications using React, TypeScript, Node.js, NestJS, and MSSQL. The position involves full-stack development, database design, data aggregation, and ensuring high performance and code quality. It also includes technical leadership, code reviews, and collaboration within cross-functional teams. 🗂️ Requirements: Bachelor’s degree in Computer Science or related field or equivalent experience, 5+ years of software development experience, Strong experience with React and TypeScript, Strong experience with Node.js and NestJS, Experience with MSSQL database design and optimization, Experience building data-driven applications and data aggregations, Knowledge of RESTful APIs, Understanding of microservices architecture, Experience with Git version control, Experience writing unit tests 📃 Skills: React, TypeScript, Node.js, NestJS, MSSQL, REST, Microservices, Git, Azure, Terraform, Databricks, Jenkins 🏢 Description: As a Senior React and Node.js Developer, you will leverage your expertise in React , TypeScript , NestJS , Node.js , and MSSQL to build scalable and efficient applications. You will play a pivotal role in the design, development, and maintenance of our web applications, ensuring they are robust, user-friendly, and data-driven. Main Responsibilities: Develop user interfaces using React and TypeScript with a focus on performance and scalability. Build and maintain back-end services using Node.js and NestJS. Design and manage MSSQL databases, ensuring data integrity and performance optimization. Implement data aggregations to drive meaningful insights and analytics. Collaborate with cross-functional teams to define and implement application features and functionalities. Write unit tests to ensure code quality and maintainability. Conduct code reviews and provide leadership and mentorship to junior developers. Troubleshoot and resolve application issues to ensure optimal performance. Stay current with industry trends and technologies to continuously improve development processes. Key Requirements: Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). 5+ years of experience in software development with a strong focus on React, TypeScript, NestJS, Node.js, and MSSQL. Proven experience in developing and managing data-driven applications, including data aggregations. Strong understanding of RESTful APIs and microservices architecture. Familiarity with version control systems (e.g., Git). Excellent problem-solving skills and attention to detail. Strong communication skills and ability to work collaboratively in a team-oriented environment. Demonstrated leadership experience in guiding and mentoring team members. Nice to Have: Experience with cloud platforms such as Azure. Familiarity with Infrastructure as Code tools like Terraform. Knowledge of Databricks for data analytics and processing. Experience with CI/CD tools, such as Jenkins. Other Details: This position offers flexibility in working arrangements, providing opportunities to work remotely. You will be part of an innovative team striving to enhance development processes and deliver high-quality software solutions.

🏢 Summary: Fullstack Engineer role focused on building and scaling a global data-driven insights platform using modern JavaScript technologies. The position involves developing backend and frontend services, designing scalable databases, and influencing system architecture. You will work on high-load systems, ensure code quality, and contribute to technical decisions and mentoring. 🗂️ Requirements: 5+ years of experience with JavaScript and Node.js, 3+ years of experience with TypeScript and React or Next.js, Hands-on experience with scalable backend systems, Experience designing SQL and NoSQL database schemas, Ability to optimize queries for high-load systems, Knowledge of web fundamentals and networking concepts, Understanding of OWASP security best practices, Experience with AWS cloud services, Experience writing unit, integration, and e2e tests, Professional proficiency in English 📃 Skills: JavaScript, Node.js, TypeScript, React, Next.js, REST, GraphQL, SQL, NoSQL, AWS, CORS, OWASP, Microservices, Serverless 🏢 Description: We’re building a data-driven insights platform used by professionals worldwide. Our mission is to turn complex data into actionable insights and empower teams to make better decisions. We value ownership, technical excellence, and collaboration . If you enjoy building scalable systems, mentoring engineers, and shaping software architecture, you’ll fit right in. 🎯 Your mission Develop and maintain backend and frontend services (REST/GraphQL APIs, React apps) Design scalable database schemas (SQL & NoSQL) and optimize queries for high-load systems Collaborate with product, design, and DevOps teams to deliver robust solutions Write clean, tested code (unit, integration, e2e) Influence architecture and technical decisions Mentor other developers and share best practices 📌 You should have 5+ years in JavaScript / Node.js 3+ years in TypeScript + React/Next.js Hands-on experience with scalable backend systems Knowledge of web fundamentals & networking (CORS, browser behavior) Understanding of security best practices (OWASP) Experience with cloud services (AWS preferred) Strong communication skills in English Ability to work independently and take ownership ✨ Nice to have Experience with microservices / serverless architectures Data pipelines, scraping, or data-heavy applications Team leadership or mentoring experience Exposure to AI/ML integrations 💡 Why join us High-impact role on a global data platform Work with modern technologies and best engineering practices Autonomy & ownership in your work Collaborative and experienced team Competitive employment package and benefits.

🏢 Summary: Frontend role focused on building and enhancing secure API integrations with external brokers using React and TypeScript in a hybrid B2B model. The position involves developing reusable UI components, collaborating with backend teams on financial API integrations, and contributing to code quality in a Scrum environment. 🗂️ Requirements: Experience in frontend development, Proficiency in React, Proficiency in TypeScript, Knowledge of REST APIs, Knowledge of JSON, Ability to work in Scrum teams, Experience with performance standards, Experience with accessibility standards, Collaboration skills, Communication skills 📃 Skills: React, TypeScript, REST, JSON, Scrum, Node.js, CI/CD, Postman 🏢 Description: General info: - Model of work: hybrid, 1x per week work from office in Warsaw - Type of contract: B2B contract - Rate: 130 PLN net + VAT / hour Introduction & Summary: Role requires expertise in frontend development to create and enhance API integrations with external brokers. Ideal candidate should have a strong proficiency in React and TypeScript. You will contribute to building user-friendly and secure interfaces, ensuring smooth integration with partners while adhering to high-quality standards. Main Responsibilities: - Develop reusable, high-quality React + TypeScript components for plugins and internal tools - Work closely with backend engineers to integrate with payment and financial APIs - Ensure performance, accessibility, and responsiveness on partner websites - Contribute to code quality through testing and code reviews - Participate in two-week sprints using Scrum methodology - Collaborate with the Product Owner for requirement clarification - Engage in continuous learning and knowledge sharing within the team Key Requirements: - Proven experience in frontend development - Proficiency in React and TypeScript - Familiarity with REST APIs and JSON - Ability to work in Scrum teams - Experience with performance and accessibility standards - Good collaboration and communication skills Nice to Have: - Knowledge of Node.js - Experience with CI/CD pipelines - Familiarity with tools like Postman - Experience in building embeddable widgets/plugins - Understanding of security and compliance in financial products

🏢 Summary: Backend-focused role involving development of scalable web applications using Java and React/Next.js. The position includes building and optimizing server-side components, APIs, and databases while ensuring performance and security. Close collaboration with cross-functional teams and end-to-end responsibility for backend quality and scalability are expected. 🗂️ Requirements: Minimum 4 years experience in similar role, Proficiency in Java server-side programming, Strong knowledge of React and Next.js, Experience with React Router and Redux, Experience with MySQL, PostgreSQL or MongoDB, Experience building scalable web applications, Knowledge of web performance and security principles, Experience with Git version control, Ability to conduct testing and debugging, English level B2 or higher 📃 Skills: Java, React, Next.js, Redux, ReactRouter, MySQL, PostgreSQL, MongoDB, SQL, NoSQL, API, REST, Git, AWS, Azure, GCP, Docker, NodeJS, Security, Testing 🏢 Description: Responsibilities: Designing, developing, and maintaining the server-side logic of web applications Implementing scalable and efficient server-side components and APIs Build React/Next.js based applications Working with relational and/or NoSQL databases to store and retrieve data efficiently Designing and optimizing database schemas for performance and scalability Integrating third-party APIs and web services to enhance application functionality Developing custom APIs to facilitate communication between front-end and back-end systems Implementing security best practices to protect against common web application vulnerabilities Conducting regular security audits and implement necessary measures Optimization: optimizing server-side code for maximum speed and scalability Monitoring and troubleshooting performance issues Collaborating with front-end developers, UI/UX designers, and other team members to ensure seamless integration of components Using version control systems (e.g., Git) to manage and track changes to the codebase Conducting thorough testing of server-side components to identify and fix bugs Collaborating with QA engineers for comprehensive testing Clear and comprehensive documentation for back-end systems and APIs Requirements: At least 4 years of experience in a similar position Proficiency in Java server-side programming Thorough understanding of React/Next.js core principles along with React router, hooks, Redux (or the like) workflows, Web performance and security Experience with database systems (e.g., MySQL, PostgreSQL, MongoDB) Proven experience in back-end development and building scalable web applications Strong analytical and problem-solving skills with attention to detail Effective communication skills to collaborate with cross-functional teams Ability to adapt to changing project requirements and technologies English at least B2 Nice to have: Familiarity with cloud platforms (e.g., AWS, Azure, GCP) Previous experience in Front-end development with Docker Experience with NodeJS Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program