
Infotree Service Sweden Filial · Warsaw
For our great FinTech client, we are looking for a Senior TypeScript developer who would like to take a Lead position in the project. RESPONSIBILITIES AND QU...
For our great FinTech client, we are looking for a Senior TypeScript developer who would like to take a Lead position in the
project.
infrastructure.
audience
infrastructure.
Position Summary We are looking for a passionate and experienced Senior Front-End Engineer to join our engineering team and help build modern, scalable, and high-performance web applications. You will collaborate with Product Managers, UX Designers, Architects, and fellow Engineers to transform business requirements into intuitive user experiences while contributing to the technical direction of our front-end ecosystem. This role is ideal for someone who enjoys solving complex technical challenges, writing clean and maintainable code, and continuously learning new technologies in a fast-paced Agile environment. Key Responsibilities Front-End Development * Design, develop, and maintain modern web applications using React and TypeScript. * Build reusable, scalable, and high-performance UI components. * Translate business and UX requirements into robust technical solutions. * Ensure responsive, accessible, and user-friendly interfaces. Architecture & Engineering * Contribute to front-end architecture and technical design decisions. * Promote clean code principles, best practices, and coding standards. * Optimize application performance, scalability, and maintainability. * Participate in code reviews and mentor less experienced developers. Testing & Quality * Develop automated unit, integration, and end-to-end tests. * Ensure high code quality using modern testing frameworks and CI/CD practices. * Identify and resolve technical issues throughout the software development lifecycle. Collaboration * Work closely with Product Owners, UX Designers, QA Engineers, and cross-functional development teams. * Participate in Agile ceremonies, sprint planning, estimation, and retrospectives. * Contribute to continuous improvement initiatives and technical innovation. Required Qualifications Experience * 5+ years of professional experience developing modern web applications. * Strong commercial experience with React and TypeScript. * Experience delivering complex front-end solutions in Agile environments. * Proven ability to work across multiple projects simultaneously. Technical Skills * Expert knowledge of React. * Strong proficiency in TypeScript and modern JavaScript (ES6+). * Experience with Angular is considered an advantage. * Solid understanding of state management (Redux). * Experience with Node.js and front-end tooling. * Hands-on experience with testing frameworks such as Jest, Cypress, Playwright, and Vitest. * Familiarity with Vite and modern build tools. * Experience with CSS-in-JS and responsive UI development. * Understanding of Server-Side Rendering (SSR). Soft Skills * Strong analytical and problem-solving abilities. * Excellent communication and stakeholder management skills. * Self-driven, proactive, and eager to learn new technologies. * Ability to thrive in a collaborative, fast-paced engineering environment. Preferred Qualifications * Bachelor's degree in Computer Science or a related field. * Experience with Micro Frontend architecture. * Knowledge of reactive programming using RxJS. * Experience with Webpack, Vite, and modern front-end build pipelines. * Experience working across the full Agile software development lifecycle. * Exposure to enterprise-scale web applications. What Success Looks Like * Delivering high-quality, scalable, and maintainable front-end applications. * Driving technical excellence through clean architecture and best engineering practices. * Building intuitive user experiences that meet business needs. * Collaborating effectively with cross-functional teams to deliver features on time.
Role description: You will be responsible for building and executing challenging projects across a number of initiatives. You will work with key stakeholders, UX Designers, and other development teams to get requirements and convert them into deliverables. You will learn new technologies, working on constantly upgrading your skill-set and the products you work on to be at-par with the best in the industry. You will innovate and solve technical challenges in an effective manner that emphasizes a long-term vision. Skills Relevant Technologies and Concepts: React, Angular, TypeScript, Jest, Cypress, Playwright, Redux, Node.js, CSS-in-JS, SSR, Vite, Vitest REQUIRED QUALIFICATIONS * 5+ years of hands-on experience with some of the latest technologies to build rich web applications * Strong hands-on experience with modern front-end technologies such as React (mandatory), Angular, Typescript, and comfortable learning new languages * Experience with clean code and testing methodologies * Superior interpersonal, communication and organization skills * Ability to work on multiple project simultaneously in a fast-paced, collaborative environment * Self-motivated and self-managed with a high degree of analytical ability, innovation and intellectual curiosity PREFERRED QUALIFICATIONS * Bachelor's degree in Computer Science * Experience working in delivery driven agile SDLC covering research, design and engineering * Experience with micro front ends * Experience with Reactive programming methodologies and frameworks such as RxJS * Experience with front-end build tools and testing libraries including Webpack & Vite Education * Bachelor's degree in Computer Science
HOW YOU WILL FULFILL YOUR POTENTIAL: You will be responsible for building and executing challenging projects across a number of initiatives. You will work with key stakeholders, UX Designers, and other development teams to get requirements and convert them into deliverables. You will learn new technologies, working on constantly upgrading your skill-set and the products you work on to be on par with the best in the industry. You will innovate and solve technical challenges in an effective manner that emphasizes a long-term vision. Skills Relevant Technologies and Concepts: React, Angular, TypeScript, Jest, Cypress, Redux, Node.js, CSS-in-JS, SSR REQUIRED QUALIFICATIONS: • 5+ years of hands-on experience with some of the latest technologies to build rich web applications • Strong hands-on experience with modern front-end technologies such as React (mandatory), Angular, Typescript, and comfortable learning new languages • Experience with clean code and testing methodologies • Superior interpersonal, communication, and organization skills • Ability to work on multiple projects simultaneously in a fast-paced, collaborative environment • Self-motivated and self-managed with a high degree of analytical ability, innovation, and intellectual curiosity PREFERRED QUALIFICATIONS • Bachelor's degree in Computer Science • Experience working in delivery-driven agile SDLC covering research, design, and engineering • Experience with micro front ends • Experience with Reactive programming methodologies and frameworks such as RxJS • Experience with front-end build tools and testing libraries, including Webpack Please note the position required 3 days/week presence in the office in Warsaw city center.