FIRST. Best in Sports is a dynamic and innovative global technology company that provides B2B SaaS solutions for online sports platforms.
We are at the forefront of innovation, empowering gaming partners with revolutionary sportsbook solutions. Our cutting-edge sportsbook software, premium data feeds, and unwavering commitment to partner success are reinventing the gaming industry. We offer a dynamic and inclusive work environment where employees are empowered to make a difference and drive our company's success.
We are looking for a Senior Full-Stack JavaScript Developer to join our fantastic engineering team. Our server architecture is micro-services based, running on JavaScript/Typescript using Nest.js framework with MongoDB and Aerospike as a data store and Pulsar as a queue-based communication. We are advocates for cutting-edge technology. In your new role, you will work at the heart of our system.
What you’ll be doing
What would be a bonus
If you are interested in joining our diverse and dynamic team, we are looking forward to your application. Only short-listed candidates will be contacted.
Confidentiality of all applications is assured!
By submitting your application, you acknowledge that the Company will process the personal data contained in your CV, résumé and/or motivational letter for the purposes of managing the recruitment and selection process, in accordance with Regulation (EU) 2016/679 (General Data Protection Regulation), applicable data protection legislation and the Company’s Recruitment Privacy Notice.
As part of the application form, you will also be asked whether you agree to the Company retaining and using your personal data beyond the applicable six-month retention period, for a total period of up to 24 months following the completion of the recruitment process, so that you may be considered and contacted for future employment opportunities.
Providing this consent is entirely optional and will not affect your application for the current position.
You may withdraw your consent to the retention and use of your personal data for future employment opportunities at any time, without affecting the lawfulness of processing carried out before its withdrawal, by sending an email request to dpo@first.bet.

FIRST.bet is a Tier-1 sportsbook technology provider: a fully managed, high-performance sportsbook engineered for speed, scale and precision across LatAm, Europe and Africa. FIRST.bet delivers market-leading sportsbook technology with a proven track record in regulated markets. The company holds licences from the Malta Gaming Authority (MGA) and the Swedish Gambling Authority (Spelinspektionen) and is GLI-33 certified and ISO-audited.
FIRST.bet was named 'Sportsbook Supplier of the Year' at both the SBC Awards 2025 and the EGR LATAM Awards 2025, 'Best Sportsbook Provider' at BiS SiGMA South America 2026, 'Sports Betting Supplier of the Year' at the EGR B2B Awards 2026; Founder and CEO Tom Light also received the 'Individual Achievement Award' at the EGR Awards 2026.