Frontend Software Engineer (React / Next.js

We are looking for a Senior Frontend Software Engineer with deep expertise in React and Next.js to lead the development of modern, scalable, and high-quality web experiences. This role is frontend-first ( 80%), with exposure to backend and AWS services ( 20%) to ensure seamless integration and end-to-end ownership of user journeys., * Frontend Architecture & Development ( 80%)

• Design and develop modern, scalable, and high-quality web applications using React and Next.js
• Take ownership of frontend architecture decisions, including: component structure, state management, routing and data-fetching strategies
• Build reusable, maintainable UI components and shared design systems.
• Ensure excellent UX, accessibility, and performance across desktop and mobile browsers
• Optimise rendering performance, bundle size, and page load times
• Translate complex product requirements into intuitive and user-friendly flows
• Implement automated tests (unit, integration, e2e) for critical user journeys
• Mentor junior and mid-level frontend engineers and help raise overall frontend quality
• Backend Awareness & Cloud Integration ( 20%)
• Integrate frontend applications with RESTful backend APIs
• Understand backend workflows and data models to build effective frontend solutions
• Collaborate with backend engineers on API design and contract definitions
• Work with AWS-based services that power frontend features, including: API Gateway, Lambda, DynamoDB
• Understand authentication, authorization, and secure frontend-backend communication
• Contribute to discussions around cloud-native solutions and migration strategy

• 7+ years of professional software engineering experience
• Strong, hands-on production experience with React and Next.js
• Deep understanding of modern JavaScript and TypeScript
• Solid knowledge of frontend performance optimisation techniques
• Experience building complex, browser-based applications at scale
• Strong focus on UX, accessibility, and product quality
• Experience integrating frontend applications with RESTful APIs
• Understanding of authentication and authorisation flows
• Familiarity with AWS-based architectures and cloud-hosted frontend applications
• Ability to work effectively in cross-functional, product-oriented teams
• Strong communication skills and fluent English (written and spoken)

Nice to Have

• Prior experience working with backend systems, especially Python
• Experience consuming or building APIs using FastAPI, Flask, or serverless Lambdas
• Experience with AWS CDK or Infrastructure-as-Code
• Experience with event-driven or serverless architectures
• Familiarity with PostgreSQL or DynamoDB data models

• Paid sick leaves (10 working days)
• National Holidays as paid time off (11 days)
• Medical Insurance after 3 months probation period (can be used in Ukraine)
• Online English courses
• Accountant assistance and legal support
• Flexible working schedule, remote, office-based or hybrid format
• Fully-equipped perfect office space located in the city center (ready for work in blackouts)
• Direct cooperation with the customer
• Dynamic environment with low level of bureaucracy and great team spirit
• Communication with Top/Senior level specialists to strengthen your hard skills
• Online/offline teambuildings
• Volunteering culture development and support