Staff Software Engineer, Frontend

Company Description

Welcome to Byborg! As a leader in IT and streaming solutions, we specialize in delivering high-quality services that offer premium online experiences.

Headquartered in Luxembourg and operating globally, our company is proud of its diversity, with over 40 different nationalities working side by side. Since its launch, our flagship product has led the market, continually pushing the boundaries of digital innovation. Today, working with the latest technology, our platforms serve millions of users daily.

We are proud of our dynamic portfolio, featuring over 16 leading and fast-growing brands. These include our streaming platforms (LiveJasmin.com, Cherry.TV, IsLive.com, Oranum.com), our marketing and advertising services (AdSupply, AWEmpire, TwinRed), and our entertainment and lifestyle brands (LoyalFans.com, The Million Roses, Kinkly.com).

Are you looking for new challenges in an international, collaborative environment? The Byborg squad is seeking passionate individuals ready to make an impact. Join us in our inclusive workplace where you will be appreciated, and you can grow and achieve your potential. Help us shape the future!

Job Description

In this role, you’ll be a key contributor to the evolution of one of the top 50 global websites (Alexa ranking). You’ll work closely with other frontend engineers, backend engineers, product managers, and designers to ship features and systems that scale across a massive user base. You’ll also mentor fellow developers, drive architectural decisions, and uphold a high bar for code quality and system design. 

Why This Role Matters 

This is a Staff-level position, which means you will: 

• Lead by influence, not title — mentoring others, guiding architecture, and raising the quality bar. 
• Solve challenging problems that impact millions of users in real time. 
• Help shape the future of the frontend stack and development practices across teams. 
• Set the tone for engineering excellence, from planning through production. 

What You’ll Do: 

• Use JavaScript (a lot!), especially modern ES7+ standards. 
• Design, implement, and maintain high-quality frontend applications, libraries, and internal tools. 
• Build new features for a massively trafficked platform — everything you do matters and reaches millions. 
• Collaborate on the creation of technical specifications and system-level designs. 
• Lead by example through clean, maintainable, testable code and thorough unit/integration testing. 
• Perform and guide peer code reviews and share constructive feedback. 
• Work closely with backend engineers, coordinating API contracts and end-to-end solutions. 
• Contribute to agile development cycles, regularly demoing completed work on production. 
• Participate in the research and evaluation of new technologies, tools, and techniques. 
• Provide mentorship and guidance to developers across the frontend guild. 
• Influence and support development standards, build tools, and CI/CD pipelines. 

Qualifications

Must-Haves: 

• BSc or MSc in Computer Science (or equivalent hands-on experience). 
• 8+ years of frontend development experience, ideally building high-availability, scalable systems. 
• Expertise in Vanilla JavaScript, with strong fundamentals in OOP, clean code, and design patterns. 
• Proven experience with React, along with deep knowledge of Redux and Redux-Saga. 
• Hands-on experience in HTML5, CSS3 (Flexbox, Grid) and preprocessors like SASS/LESS. 
• Solid understanding of the JavaScript ecosystem (NPM, Babel, Node.js). 
• Comfortable with GitFlow and agile workflows. 
• Knowledge of frontend build tools like Webpack, Gulp. 
• Experience writing unit and integration tests using Jest, and an understanding of TDD. 
• Strong knowledge of REST APIs and how to interact with backend services. 
• Able to communicate fluently in English (B2+), both written and verbal. 
• Able to use the command line for everyday development tasks. 

Nice-to-Haves: 

• Experience with TypeScript or type-safe JS (Flow, etc). 
• Hands-on knowledge of WebRTC, WebSockets, or real-time messaging/video tools. 
• Experience building for mobile browsers and responsive design. 
• Knowledge of Next.js, Chakra UI, and Yarn. 
• Familiarity with GraphQL, RDBMS/NoSQL, or large-scale data systems. 
• Understanding of ServiceWorkers, streaming technologies, and performance optimization strategies. 

Additional Information

What we offer

• An exceptional compensation package
• Your health is our wealth: We will offer you a private health insurance and an AYCM sportspass
• Cafeteria benefit (gross 500.000 Ft / year)
• The opportunity to see your work directly contribute to the success of the company
• When you grow, we grow: You have the chance to attend events, meetups, and other perks for your professional growth
• You’re joining the #ByborgSquad and you are going to look the part! We give out company-branded merchandise to every new joiner
• And of course, a fun, professional, and collaborative work culture

Byborg Enterprises is an equal employment opportunity employer. We consider individuals for employment based on their skills, abilities and experience. We thrive to attract and hire a strong, talented and diverse workforce, prohibiting discrimination based on race, color, religious or political beliefs, age, nationality, physical, mental or developmental disability, gender, sexual orientation.

DISCLAIMER: This job description is a summary of the primary duties and responsibilities of the job and position. It is not intended to be a comprehensive or all-inclusive listing of duties and responsibilities. Contents are subject to change at management's discretion.

NOTE: Byborg Enterprises SA does not accept unsolicited resumes from agencies. We consider any resume (CV) or biography received from an agency without prior approval from our Legal and Recruiting Department to be unsolicited, and such submissions will not be recognized for purposes of “ownership” of the candidate.

We are in it for the long haul so your future is safe with us.