FIRST - Best in Sports Tech Stack

Sportsbook software and data platform for gaming operators

Software Development Sofia, Sofia City 501–1,000 employees Privately Held

FIRST builds sportsbook software for gaming operators, running a full-stack platform in Node.js, React, and TypeScript with backend services in C# and Orleans, containerized across Kubernetes. The tech shape—TypeScript frontend, multiple backend languages, MongoDB persistence, and orchestration via Helm—suggests a modular, multi-tenant architecture. Active pain points around real-time odds delivery, data accuracy, and suspicious-activity detection reveal the core operational complexity: handling live-updating odds, high-volume bets, and compliance risk simultaneously.

Tech Stack 32 technologies

Core StackNode.js TypeScript JavaScript React Nest.js MongoDB Kubernetes Docker Helm C# Jenkins Jira Confluence Bitbucket MobX Helmfile F# Orleans Mocha REST API Excel Microsoft Office Google Sheets Visual Studio Code Git Instagram TikTok YouTube LinkedIn Twitter

What FIRST - Best in Sports Is Building

◆Challenges

Increasing test execution visibility
Improving code quality
Managing legal risks
Process improvements and cost saving
Accurate real-time sports data delivery
Live match odds updating
Ensuring data accuracy and integrity
Detecting suspicious betting activity
Monitoring sportsbook exposure
Odds optimization and liability management

▲Active Projects

Evaluation of sportsbook campaigns and promotions
Testing and implementation of new sportsbook features
Promotions and loyalty programs
Platform updates and new features

Hiring Activity

Accelerating15 roles · 8 in 30d

Department

Engineering

Ops

Support

Data

Finance

Legal

Marketing

Seniority

Mid

Junior

Lead

Manager

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About FIRST - Best in Sports

FIRST - Best in Sports is a sportsbook software provider serving gaming operators globally. The platform includes a full-featured sportsbook client (React-based), backend services for odds management and bet settlement, data pipelines for sports feeds, and tools for campaign evaluation and loyalty programs. The company operates from Sofia with a 501–1,000-person team split across engineering, operations, support, and data functions, with active hiring in Bulgaria and Ukraine. Their engineering is mid-weighted toward core platform work, with visible focus on testing infrastructure, code quality, and real-time data reliability.

HeadquartersSofia, Sofia City

Company Size501–1,000 employees

Hiring MarketsBulgaria, Ukraine

Frequently Asked Questions

What tech stack does FIRST - Best in Sports use?

Frontend: Node.js, React, TypeScript. Backend: C#, F#, Orleans. Data: MongoDB. DevOps: Kubernetes, Docker, Helm. CI/CD: Jenkins. Collaboration: Jira, Confluence, Bitbucket.

What is FIRST - Best in Sports working on?

Campaign and promotion evaluation, new sportsbook feature testing and rollout, loyalty program improvements, odds optimization, and platform updates. Core challenges include real-time odds delivery, data accuracy, and fraud detection.