Frontend Engineer | Senior | React | Saily

Frontend Engineer | Senior | React | Saily

Full Time

hybrid

Frontend

Vilnius

At Saily, we’re removing the hassle of staying connected while traveling — no roaming fees, no plastic SIM cards, just lightning-fast, secure mobile data in 200+ destinations. Saily has millions of paying customers and hundreds of thousands travelers browsing through Saily at any given moment.

To build the best product for our customers we foster AI-native Product Engineering culture, where:

- The Engineer is the builder, who is responsible for solving customer problems end-to-end (idea to production)
- AI Agents are the enablers who write most of the code and solve repeatable tasks to help the Engineers maximize their impact
- Everyone contributes to making Saily effective by suggesting new areas for improvement to delegate to agents and then implementing the changes
- Curiosity, learning and sharing are everyone's responsibility
- Customer, having a comfortable, connected, hassle-free journey is never lost from the focus

We value growth over comfort, contribution over hierarchy, and impact over process. At Saily, we believe in giving sharp people context, autonomy, and AI as their multiplier to allow them to just do their best work.

Main Responsibilities

Build a framework to support blazing-fast web pages - think of sub-second loading times.
Create features to support layers of multi-dimensional personalization, A/B experimentation, and analytics via CloudFlare Workers and your custom-built platforms.
Develop and maintain a high-quality code base.
Seek to improve web performance constantly.
Mentor colleagues on web development best practices & provide technical guidance.

Core Requirements

Proven development experience working with JavaScrip and TypeScript (4+ years).
Experience with React framework.
Deep knowledge of web development, testing, and performance optimization best practices.
Proven experience in developing high-quality, high-performance front-end web applications that run at scale.
Team spirit, proactivity, and ability to work in a fast-paced environment.

Bonus Points For

Fullstack experience.

Tools You Will Use

Frontend: Next.js, React.js, TypeScript, GraphQL, Tailwind CSS, Cloudflare Workers

Backend: Go, MySQL, Kafka, Docker, Kubernetes, AWS, Redis

IOS: SwiftUI, Xcode, Combine, SPM, MVVM Architecture

Android: Kotlin, Android Studio, Hilt, Coroutines, Jetpack Compose, MVVM Architecture

AI tools: Claude Code, OpenAI Codex, OpenCode, Cursor with Composer

Salary Range

Gross Salary: 3200 EUR - 7000 EUR/month

Perks we offer

Our global mission fuels our drive. But when you need that extra push - here’s a list of things to look forward to.

Apply for this job

Frontend

Vilnius

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Current Location

Are you based in Vilnius and can work from here?

Yes

On-site Attendance

Can you work from the office at least three days per week?

Yes

Nord Security is committed to building an inclusive workplace with a diversity of backgrounds. We welcome applications from people of all ages, gender identities, sexual orientations, racial identities, ethnicities, religious beliefs, and disability statuses. To reduce the chance of unconscious bias, you may submit your CV without a photograph or other redundant information like age or marital status.

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Our values

Our values are rooted in the actions of our people. They describe how we solve problems, make decisions, and ultimately - reach our goals as a team.