At DraftKings, AI is becoming an integral part of both our present and future, powering how work gets done today, guiding smarter decisions, and sparking bold ideas. It’s transforming how we enhance customer experiences, streamline operations, and unlock new possibilities. Our teams are energized by innovation and readily embrace emerging technology. We’re not waiting for the future to arrive. We’re shaping it, one bold step at a time. To those who see AI as a driver of progress, come build the future together. The Crown Is Yours As a Lead Backend Engineer, you'll lead the charge in building scalable systems that power real-time experiences for millions of customers. You'll architect robust solutions, write high-performance code, and guide a team committed to technical excellence. Working across disciplines, you'll align engineering execution with business strategy and elevate our enterprise platform. This is a rare opportunity to lead with impact, shape product direction, mentor talent, and drive innovation at scale. What You'll Do - Architect, develop, and maintain scalable and secure systems and APIs that power high-impact applications used by millions of users in a real-time, always-on environment. - Take ownership of the full development lifecycle from shaping the architecture of new features to breaking down workstreams and guiding implementation. - Lead by example, writing high-performance, well-tested code that meets our rigorous standards for reliability and scalability. - Set and enforce best practices around code quality, design patterns, testing, and system performance. - Triage, debug, and resolve complex issues in production environments, driving a culture of accountability and operational excellence. - Collaborate cross-functionally with Product, Design, and Engineering teams to align technical solutions with strategic business goals. - Act as a technical mentor and coach, providing guidance and feedback that helps engineers grow and deliver their best work. - Play a critical role in shaping the team’s roadmap and technical direction while fostering a strong engineering culture grounded in ownership and continuous learning. What You'll Bring - Bachelor's degree in Computer Science or any suitable combination of education, experience, and training. - At least 5 years of experience in object-oriented backend development using languages such as C#, with advanced expertise in OOP principles, design patterns, and backend architecture. - Proven ability to architect, build, and scale distributed systems in Cloud environments such as AWS or Google Cloud Platform (GCP). - Deep experience developing and maintaining comprehensive automated test suites, including unit, integration, and performance tests, to ensure system resilience and scalability. - A strong track record of mentoring engineers, leading code and design reviews, and driving high-impact technical decisions across cross-functional teams. - A proactive mindset with a focus on continuous improvement, code quality, and driving engineering best practices across teams. #LI-TK1 #LI-REMOTE Join Our Team We’re a publicly traded (NASDAQ: DKNG) technology company headquartered in Boston. As a regulated gaming company, you may be required to obtain a gaming license issued by the appropriate state agency as a condition of employment. Don’t worry, we’ll guide you through the process if this is relevant to your role.

We are knowmad mood! Somos una compañía líder en transformación digital, en constante evolución y a la vanguardia de la tecnología. Nacimos para provocar un cambio real a través de la innovación y el desarrollo sostenible, con la misión de aportar valor a los clientes e impulsar nuestro talento. Formado por más de 3.000 personas creativas, digitales e innovadoras conectadas a un propósito y capaces de generar conexiones con personas de todo el mundo. Un equipo responsable, flexible y con alta capacidad de adaptación a las necesidades de nuestros clientes y del mercado, a la vez que proporciona valor, visión, creatividad, expertise, profesionalidad y pasión por la tecnología en cada proyecto. Los valores que marcan nuestro rumbo y nos guían hacia la excelencia son la colaboración, la innovación, el compromiso, la diversión y la confianza. ¿Qué es lo que valoramos? Valoramos perfiles con sólida experiencia en desarrollo Frontend y testing avanzado, especialmente en: - JavaScript (ES5/ES6), HTML y CSS - Testing completo: unitario, componentes, integración, E2E, visual y accesibilidad - Contract testing - Frameworks frontend (Angular, React, Vue, Polymer o Lit) - Arquitecturas frontend y microfrontends - Herramientas CI/CD: Yarn, NPM, Bower - Control de versiones (Git) - Build tools: Webpack, Rollup y CLI basadas en Node - JSON, REST y Web Services - TDD y enfoque a calidad - TypeScript - Integración con backend (Java + Spring) - Docker y exposición segura de servicios - Azure DevOps - Nivel alto de inglés ¿Cuáles serían tus funciones? - Diseñar y ejecutar estrategias de testing: unitario, integración, E2E, visual, accesibilidad y contract testing. - Desarrollar y mantener componentes y funcionalidades frontend utilizando JavaScript moderno y frameworks avanzados. - Construir y optimizar pipelines de CI/CD con herramientas como Yarn, NPM o Azure DevOps. - Aplicar patrones y arquitecturas frontend, incluyendo microfrontends. - Colaborar con equipos de desarrollo, QA y arquitectura para garantizar soluciones robustas, escalables y mantenibles. - Trabajar con Docker y Java/Spring para integraciones y servicios necesarios en el ciclo de desarrollo. - Aplicar TDD y buenas prácticas de calidad, asegurando entregables fiables desde el primer día. Y con nosotros podrás disfrutar de: ✅Contrato Indefinido ✅ 100% REMOTO ✅Formación interna y acceso a certificaciones ♻Consulta nuestro calendario aquí: https://www.knowmadmood.com/es/talento/formacion ✅Plan de retribución flexible (seguro médico, transporte, tickets guardería, tickets restaurante) ✅Embajador de nuestra marca, a través de nuestro plan amigo ¡Recomienda a tus amigos y llévate un extra! ✅¡Eventos, meetups, techdays, charlas...y mucho más! ✅ 26 días de descanso (22 días vacaciones, 2 días de libre disposición y 24 y 31 diciembre festivos por defecto) ✅ Horario: 8.30 a 18h ( flexible) L-J y V 8 a 15h e Intensiva de Verano Julio y Agosto de 8 a 15h En knowmad mood nos comprometemos con la igualdad de oportunidades y el respeto a la diversidad. Aplicamos nuestro Plan de Igualdad y el principio de no discriminación en todos nuestros procesos de selección. Para estar al corriente de nuestras novedades síguenos aquí -> knowmad mood

Company Description We believe the power of risk-driven investing can help anyone achieve a better life. And we’re here to make this potential a reality for an emerging global generation. We provide individuals in the world’s fast-developing economies with guidance, tools, and easy market access so they can trade and invest with confidence. We aim to make our clients their own wealth manager: empowered to create investment strategies and make investment decisions effortlessly, in their own time, on their own terms, in their own way. Our story goes back to the first days of online Forex trading - a pioneer of the Metatrader platform, Alpari, expanded rapidly in the world’s emerging markets and was joined in 2011 by our sister brand, FXTM. Now, we are adding further brands to our portfolio. Together, both brands have built a leading global presence in online trading serving over two million clients in 150 countries from regulated centres across four continents. Exinity is an energetic and diverse company with offices across Europe, Asia and Africa, and we’re always looking for talented individuals to join us. ‘Freedom to Succeed’ is not just a promise we make to our clients and partners, but to our people too. We’ll help you develop a range of skills, take on early responsibility, and enjoy a rewarding and fulfilling career with a fast-growing, dynamic company. Job Description We look for Developers who are able to pick up tasks and independently investigate them whilst striving to find solutions, demonstrate the ability to spot code inefficiencies and wish to learn something new. We expect proactivity and interaction with other teammates. Responsibilities: - Develop new and efficient solutions, including but not limited to: - Risk Management tools - Trading monitoring - Trading integrations Qualifications Essential: - At least 3 years of experience with Golang - Have expertise in implementing micro services (using tools and technologies for messaging, RPC, etc.) - Experience working with SQL/NoSQL databases, ability to write complex queries and optimize them - Understanding of containerization technologies (Docker, Kubernetes) - Ability to work effectively with message queues (Apache Kafka, Redis Streams, etc) - SBU: Technology

About Checkmate Checkmate is a restaurant technology solution provider that has continually evolved over time. We started in 2017 by integrating 3rd party platforms to the POS systems of restaurants. At that time, there were multiple 3rd party platforms like GrubHub, UberEats, DoorDash, Postmates, Caviar, and even Amazon! This was the photograph that started it all! We have since then continually evolved to add multiple products to our portfolio, the primary ones being first party ordering solutions like web and app ordering, kiosks and catering. We have now recently moved into three new exciting products: Digital Menu Boards, Phone Ordering AI and Drive thru AI. We form a very core part of the restaurant technology ecosystem, and are continually adding more and more digital solutions for the restaurant brands to increase their sales. Our revolutionary enterprise menu management system, Everyware, truly unlocks the potential of menus and how it can be customized for each individual digital channel. As you can see, this is a company that continually evolves and adapts and today we are powering digital ordering solutions for some of the largest brands in the world. We have been called the "north star of vendors" as we truly believe that technology is just a method by which we service the customers, it does not form the entirety of it. Service is a big component of what we provide to our customers, which is inherently believed by every single team member here. We are doing a lot of exciting things, including application of AI in our products and systems, using experimentation at scale to determine what works for our clients and ML to analyze and productize the massive amount of data we have. Each individual here makes a difference and has a valuable contribution. Key traits here are ownership and drive. Join us if you think you have them. We’re looking for an experienced Senior Full Stack Engineer (Ruby on Rails, React.js) to join our team and help build and scale the systems that power our core applications. You’ll work closely with product managers, designers, and other engineers to design scalable backend systems, manage core data logic, and develop modern responsive user interfaces for a large, high-traffic platform that supports web and mobile experiences. This is a highly impactful role for someone who is passionate about performance, reliability, user experience, and writing clean, maintainable code. What You’ll Do As a key member of our engineering team, you’ll design, develop, and maintain critical services that support our products and customers: - Frontend Development & UX Focus: Build and maintain modern web applications using React.js, ensuring responsiveness, scalability, and performance. Work closely with UI/UX designers to implement user-friendly interfaces, ensuring cross-browser compatibility and optimization. - Backend Development & Core Services: Design, develop, and maintain critical backend services and core application logic using Ruby on Rails, ensuring high reliability, performance, and security. - API Development: Design, build, and optimize RESTful or GraphQL APIs to provide efficient, reliable data access for the React frontend and other internal systems. - Architecture & Performance: Architect and implement scalable full-stack systems. Continuously optimize performance, reliability, and efficiency through profiling, caching (e.g., Redis), and background job processing (e.g., Sidekiq). - Database Management: Design, maintain, and optimize relational databases such as PostgreSQL and MySQL. Write and tune SQL queries for performance and scalability. - System Reliability & Monitoring: Contribute to improving observability and performance monitoring. Quickly diagnose and resolve production issues across various environments and platforms. - Code Quality & Automation: Write clean, efficient, and well-documented code emphasizing modularity and maintainability. Ensure code quality through best practices, comprehensive automated testing, and active participation in code reviews. Contribute to improving CI/CD pipelines, deployment workflows, and proactively identify areas for system and process improvement. - Collaboration & Feature Delivery: Work closely with other engineers, product managers, and designers to deliver impactful, user-focused features that align with product goals.