Senior Frontend Engineer
Casumo is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.
Join us at Casumo, where you are invited to be your authentic YOU-MO!

Company Overview:
Welcome to Casumo, your passport to a world of fun, excitement, and responsible gaming. We're an international online casino company with a knack for creating unforgettable gaming experiences. Our secret sauce? A blend of innovation, security, and a dash of playful charm.
Nowadays, we're on the hunt for a dynamic Senior Frontend Engineer to join our team!
Position Overview:
At Casumo we work across our lovingly crafted and award-winning web app and a suite of bespoke tools to support us in building the best player experience through our joint passion and creativity.
We are looking for an experienced Senior Frontend Developer with a passion for delivering fast, reliable, and performant web applications. In this role, you'll bring deep knowledge of server-side rendering (SSR), multiple frontend frameworks, and performance monitoring tools to ensure our users experience the best our product has to offer. If you’re driven to create seamless, responsive experiences and are excited to push the boundaries of what’s possible with modern frontend technology, we want to hear from you.
Responsibilities:
Design, implement, and test features to enhance the customer experience using frameworks like React and Svelte (SvelteKit experience is a plus).
Use server-side rendering to optimize load times, enhance SEO, and improve overall application performance.
Take ownership of frontend performance metrics. Regularly monitor and analyze performance data using tools like Sentry and Browserstack to proactively identify and resolve bottlenecks, ensure smooth user interactions, and minimize latency.
Build responsive web applications that perform well on various devices, adapting layouts, assets, and scripts to ensure optimal loading times and user experiences across platforms.
Work closely with product designers, backend engineers, and other team members. Communicate effectively through our main channels: GitHub, Slack, Jira, and Confluence.
Maintain robust code quality by integrating automated testing and CI/CD pipelines, allowing for rapid, reliable feature releases.
Dedicate time for exploring new frameworks, languages, and tools that could enhance application performance and drive overall team effectiveness.
Join and contribute to a respectful, international team culture where open-mindedness, support, and collaboration are highly valued.
Requirements:
A positive, open-minded and creative problem solver.
You enjoy learning from others and sharing knowledge.
You design, develop, test, deploy, maintain and enhance software solutions. We hope that the following resonates with you: you take pride in the code you write and you understand the importance of writing in a scalable and maintainable way.
You are eager to keep up-to-date with the latest trends in your craft which hopefully is along the lines of JS development and tools.
You are excited to write in a declarative functional style. TDD, Unit and Functional Testing in JavaScript are your jam.
You thrive on creating positive changes, without losing friends over the existence of semi-colons.
You enjoy working with backend engineers to design awesome APIs.
Please note: As Casumo is an international company and English is our working language, we kindly ask you to submit your CV in English.
The Perks:
Our Malta Office:
Being a part of the Casumo group provides an unparalleled experience. You’ll find yourself surrounded by the brightest minds within the most inspiring and collaborative office spaces! In addition to that, you’ll enjoy:
- Private health insurance
- Wellness incentives, including a fitness allowance and mental well-being services
- Flexible national holidays: public holidays mean more time off, choose how and when to enjoy them!
- 2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
- Gourmet lunches and healthy snacks prepared by our in-house chef
- Variety of discounts from local vendors
- Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
- A range of training courses, known as Casumo College, for continuous learning and growth
- Social events for building strong relationships with colleagues from all across the organisation
Our Macedonia Office:
- Private health insurance
- Wellness incentives, including a fitness allowance and mental well-being services
- 2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
- Office lunches -three times per week
- Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
- A range of training courses, known as Casumo College, for continuous learning and growth
- Social events for building strong relationships with colleagues from all across the organisation
Our Zagreb Office
Wellness incentives, including a fitness allowance and mental well-being services
2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
Food allowance
Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
A range of training courses, known as Casumo College, for continuous learning and growth
Social events for building strong relationships with colleagues from all across the organisation
Our ABC values:
ASPIRE
At Casumo, "aspire" means pushing beyond the ordinary and transforming obstacles into stepping stones. Challenges are our breakfast of champions, and comfort zones are out of bounds. Mediocrity? Left behind. Our mantra? Dream big, aim high, and always be ready for the next adventure in innovation.
BELIEVE
Belief at Casumo isn't just a feel-good sticker; it's the glue that binds us. Turning "me" achievements into "we" victories, we're a tight-knit crew of dreamers, doers, and relentless supporters. With a high-five arsenal and a trusty cheerleading squad, we're on a mission to prove that together, we're not just strong; we're Casumo strong.
CARE
Care is our secret ingredient, the cherry on top of our game. It's not only about ensuring our players have a blast (responsibly, of course); it's about weaving a fabric of support so tight, even the toughest challenges can't tear us apart. From tailoring player experiences to being there for each other, we're all about creating memorable moments.
- Department
- Tech
- Role
- Senior Frontend Engineer
- Locations
- Zagreb Hub, Malta Headquarters, Macedonia Hub
- Remote status
- Hybrid
- Employment type
- Full-time
Senior Frontend Engineer
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