Senior Javascript Engineer - Core Experience

LeoVegas Mobile Gaming Group; Warszawa; Hybrid; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Hybrid work policy

Workation

Benefits package

Training budget

ICAS assistance

Complimentary snacks

Social events

Bike parking

Free gym

MacBook Pro + phone

Job summary

LeoVegas Mobile Gaming Group in Warsaw seeks a Senior JavaScript Engineer to build and maintain frontend features for LeoVegas.com, collaborating closely with product, design, and backend teams. The role focuses on RoW markets and evolving the brand across territories.

The candidate will bring deep JavaScript/TypeScript, React and Next.js expertise with GraphQL and Node.js experience, enabling robust, scalable frontend delivery while exploring AI-assisted engineering practices.

Qualifications

• Strong, proven experience with JavaScript, TypeScript, React, and Next.js.
• Solid working knowledge of GraphQL.
• Practical experience with Node.js and microservices.

Responsibilities

• Develop and maintain high-quality JavaScript applications.
• Ensure a smooth and engaging user experience.
• Drive the development of most frontend features of LeoVegas.com.
• Improve and maintain the applications with a product focus.
• Contribute to launching new brands and expansions into new territories.

Skills

JavaScript

TypeScript

React

Next.js

GraphQL

Node.js

Microservices

Job description

ABOUT THE ROLE:

We are looking for a passionate and experienced self-driven Senior JavaScript Engineer to join in on our mission to deliver the greatest igaming experience to our customers. As a part of our multinational frontend team, you would be an important cog in the machinery, creating new features for and maintaining the full product of LeoVegas.com.

In close collaboration with product managers, designers and our backend peers, we get to work with a broad variety of initiatives, you will be a key factor delivering features and maintaining our brand. With focus on our so-called RoW (Rest of the world) cluster, you will directly act on markets such as Canada, Germany, Malta and some others, with the possibility to bring your own experience close to the current team, and stakeholders.

YOU WILL BE RESPONSIBLE FOR:

• Develop and maintain high-quality JavaScript applications
• Ensure a smooth and engaging user experience
• You will be responsible for driving the development of most of the frontend features of Leovegas.com
• Improve and maintain the applications with a product focus
• Contribute to launching new brands and brand expansions into new territories

OUR SUCCESSFUL CANDIDATE WILL HAVE THE FOLLOWING: Essential Skills:

• Strong, proven experience with JavaScript, TypeScript, React, and Next.js
• Solid working knowledge of GraphQl
• Practical experience with Node.js and microservices

Nice to Have:

• Experience with tracking and monitoring tools (e.g., Datadog)
• Familiarity with OpenAPI and BigQuery
• Experience leveraging AI tools like Claude or GitHub Copilot, alongside a strong curiosity for using AI to elevate engineering practices
• Curiosity and enthusiasm for adopting AI to enhance engineering practices and software delivery

WHO WE ARE:

At the core of LeoVegas Group is Team Leo. Our culture is our foundation and is what enables us to innovate, build, and lead as we trailblaze our way through the igaming industry. We’re a team of over 2000 innovators, initiators, and groundbreakers working in a fast-paced and agile environment across 19 offices worldwide.

BENEFITS:

• Hybrid work policy
• 4 weeks of Workation (T&C apply)
• Benefits package - 800 PLN net (B2B)/gross (UOP) monthly with access to the cafeteria platform (private medical care, insurances, sports card)
• Training budget
• ICAS assistance program that can provide help and guidance during challenging moments.
• Our office provides complimentary snacks and drinks; on Mondays, we serve complimentary breakfast.
• Team and office social events throughout the year
• Free parking for bicycles and motorcycles
• Free gym in the building
• Equipment: MacBook Pro + smartphone (iPhone 16/17 or Samsung Galaxy S25)

JOIN US!

In our pride, we empower our teammates to find their roar and run with their wildest ideas. We don’t wait for things to happen; we pounce and make it happen! Would you be a good fit for the Leo Pride - give us a roar!

As our company's working language is English, we’d like to see your CV in English, please.