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Senior Front-end Developer at JustAnswer. Location Information: Ukraine. About the Role. As a Senior Front-End Engineer, you will be vital in optimizing and advancing the front-end ecosystem at JustAnswer. This position focuses on performance, scalability, and enabling faster front-end development cycles across the company. As a part of the 5-engineer team, you’ll collaborate closely with over 30 software engineering teams across multiple initiatives, helping identify pain points, introduce automated insights, and test AI-driven solutions to boost developer productivity. Our front-end serves 8 M daily visits, 240 M requests, 5 Tb of traffic, and 10 M page views every day and supports over 300 production releases every week across 200+ services. Your contributions to the front-end infrastructure team will directly impact how quickly and reliably the company can ship customer-facing features, used by millions globally.. What You’ll Do. Write high-quality, testable, and maintainable front-end and front-end infrastructure code to keep our platform modern, secure, and performant. Partner with initiative teams and individual engineers to understand front-end challenges and drive scalable, high-impact solutions. Build and implement automated metrics and dashboards to track performance and identify bottlenecks in the front-end development process . Research, evaluate, and test AI-powered tools and solutions to improve front-end workflows . Actively participate in code reviews, knowledge sharing, and mentoring to elevate front-end quality company-wide. What We’re Looking For. 5+ years of experience in front-end development with a strong emphasis on test-driven development. Proficiency in HTML, CSS, and JavaScript, with solid experience using React (or similar frameworks). Familiarity with front-end build tools and package managers (e.g. npm). Experience working with CI/CD pipelines and modern front-end infrastructure. Strong collaboration and communication skills; comfortable engaging with large engineering teams. Ability to independently evaluate tools and introduce improvements across a complex system. Upper-Intermediate English or higher. Deep testing hands on experience (Jest, React Testing Library, etc.). Familiarity with containerised and cloud-native deployments (Docker, Kubernetes) would be a plus