Backend Developer

Celesta Tech — Portugal · Posted ~23 hours ago

Hybrid

Skills

backend development web application development sportsbook application development cross-platform development team collaboration software engineering

🔓 Log in to save this job, tailor your resume & track your apply process — 7 days free, no card needed.

Log in to add to target list

Summary ✨ AI‑Generated

Join a growing engineering team developing next-generation digital entertainment applications. You will help deliver fast, reliable, user-friendly cross-platform experiences, collaborating with design, quality assurance, product, and engineering specialists. The role combines office-based work with limited remote flexibility.

Highlights

Join a fast-growing engineering environment focused on innovative, reliable, and user-friendly digital experiences. The role offers cross-functional collaboration and a mix of office and remote work.

Description

Celesta, part of La Royale Group, is a fast-growing iGaming development company dedicated to building next-generation online sports betting and casino experiences. Based in Lisbon, our multidisciplinary team is committed to quality, innovation, and regulatory excellence, creating solutions that engage players and stand out in the highly competitive i-gaming regulated market. We are now seeking a Backend Developer to join our engineering team. In this role, you will spearhead the development of our sportsbook web applications, delivering intuitive and seamless cross-platform experiences. From live betting interfaces to personalized dashboards, you will guide a team that ensures every feature is fast, reliable, and user-friendly. This position reports directly to the Team Leader/ VPoE and works closely with designers, backend, QA, and product teams. The role should be based at the office in the Carnaxide area (up to 8 days per month remotely), and the first month is fully on-site. Main job responsibilities: Collaborate with other team members to establish objectives and design functional, scalable and maintainable backend solutions that enhance the user experience.Develop ideas for new programs, products and features by monitoring industry developments, emerging technologies and AI advancements.Build reusable code, libraries and services for future use.Develop and maintain RESTful APIs and backend services.Write high-performance, secure and scalable code.Implement security, data protection and best software engineering practices.Liaise with developers, designers and system administrators to identify and implement new features.Leverage AI-assisted development tools (e.g. GitHub Copilot, ChatGPT, Claude or similar) to improve productivity, accelerate development, assist with debugging, documentation and code generation, while ensuring the quality, security and maintainability of all deliverables.Evaluate, validate and critically review AI-generated code and technical solutions, ensuring compliance with coding standards, security requirements and business needs.Continuously evaluate and adopt emerging technologies, including AI-powered development practices, to improve engineering efficiency and software quality. Skills/knowledge required for the position: At least 3 years experience in software developmentGood level of programming skills in >=PHP8Ability to debug complex PHP applications (Xdebug, Profiler, and others)Development following different coding principles (SOLID, KISS, ACID, etc)Strong knowledge in developing with latest Symfony versionsKnowledge of Object-Oriented Programming and Design PatternsExperience using AI-assisted software development tools (such as GitHub Copilot, ChatGPT, Claude, Cursor, Windsurf or similar) to support coding, debugging, testing and documentation.Ability to critically assess, validate and refine AI-generated outputs rather than relying on them without technical review.Knowledge of RabbitMQ, Docker, ElasticSearch is a plusKnowledge of Websocket / Socket.IO is a plusExperience with Web Services, MicroservicesExperience with AWS, GCP, Kubernetes is a plusExperience with Go would be a plusProficient level of English What We Offer Competitive salary & full benefitsCareer growth in a fast-growing iGaming companyOpportunity to shape a high-impact sports betting productHybrid work model as per Company’s PolicyPerks: lunch & transport allowance as per Company’s Policy25 days paid vacation per yearHealth & dental insurance + wellness reimbursement (after 6 months work)A collaborative culture where your input mattersTeam events & monthly office activities