Senior Frontend Engineer (React)

N-iX • Bachelor's Degree • JavaScript • TypeScript • 2 months ago
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Salary
$67k – $72k per year
Location
Remote (Poland)
Seniority
Senior
Employment
Full-Time
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N-iX

N-iX is a global software development and IT consulting company founded in Lviv, Ukraine, in 2002. The firm partners with enterprise clients, mid-sized businesses, and tech startups to deliver custom software engineering, cloud transformation, AI and data analytics, and embedded systems solutions. Operating across multiple delivery hubs in Europe and the Americas, it focuses on helping organizations scale their engineering capabilities and accelerate digital transformation.
n-ix.com • HQ: Lviv, Ukraine • HQ: Valletta, Malta • Data & Analytics • Artificial Intelligence • Software • 1001-5000 employees • Est. 2002

Company Overview

Our client is a leading, fully regulated US-based digital asset trading platform. They provide secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem.

About This Role

The Senior Software Engineer, Web is part of the Engineering team and reports to our Manager, Engineering. As a Senior Software Engineer, Web, you will be responsible for designing and building scalable, high-performance web applications using Next.js and modern front-end technologies.

You will partner with Product, Design, Backend, and DevOps teams to deliver performant, accessible, and secure user experiences while contributing to front-end architecture and engineering best practices.

Key Responsibilities

  • Design and implement scalable front-end features using Next.js, React, and TypeScript.

  • Own end-to-end development of web features, including testing, deployment, and maintenance.

  • Build modular and reusable UI components to support scalable development.

  • Optimize web performance through SSR/SSG, lazy loading, and responsive design techniques.

  • Monitor and improve performance metrics such as page load time, TTI, and Core Web Vitals.

  • Collaborate cross-functionally with Product, Design, Backend, and DevOps teams to define requirements and deliver features.

  • Contribute to front-end architecture decisions and engineering best practices.

  • Participate in code reviews and mentor junior engineers to improve code quality and team standards.

  • Partner with DevOps to support CI/CD pipelines and reliable deployment processes.

  • Ensure high standards in code quality, accessibility, security, and automated testing (unit, integration, E2E).

Required Qualifications

  • Bachelor's or Master's degree in Computer Science or related field.

  • ~8 years of professional software engineering experience, or ~6 with an advanced degree.

  • Strong communication and collaboration skills, motivation, problem solving mind set.

  • Strong proficiency in Next.js, React, TypeScript, JavaScript, HTML5, and CSS3.

  • Strong experience with GraphQL and REST API.

  • Experience with performance optimization tools (Lighthouse, WebPageTest, Chrome DevTools).

  • Solid understanding of SSR/SSG, CDN strategies, caching, and responsive design principles.

  • Familiarity with front-end security best practices.

  • Experience with Git, CI/CD pipelines, and modern deployment workflows.

  • Exposure to cloud platforms such as AWS or GCP.

  • Strong collaboration skills working with Product, Design, and Backend teams.

  • Experience mentoring junior engineers and contributing to team development.

  • Bonus: Experience with analytics instrumentation or blockchain-integrated front-ends (e.g.,ethers.js, wallet integrations).

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