Senior Back-End Developer

3cket is reshaping the events industry with cutting-edge technology. Our SaaS empowers event organizers, agencies, and brands to create unforgettable experiences through powerful management tools, innovative payment solutions, and real-time analytics for both live and online events.

With over 12,000 events deployed, we are trusted by leading event promoters and brands across Portugal and Spain, and are now expanding into new international markets. As we scale, we’re looking for a Senior Developer to join our team and help drive backend development, guide architectural evolution, and support the growth of our engineering team. We’re looking for someone who not only brings strong technical expertise but also thrives in a startup-style environment — where ownership, adaptability, and product thinking are essential.

Key Responsibilities

• Lead the design, development, and maintenance of scalable backend services using PHP (Symfony) and Go (Golang).
• Drive architecture decisions using Domain-Driven Design (DDD) principles and contribute to the long-term technical vision of the platform.
• Mentor and support other developers, promoting engineering excellence and team autonomy.
• Collaborate cross-functionally to understand product and business needs, translating them into robust technical solutions.
• Lead and contribute to the transition of legacy monoliths into modular microservices with a focus on scalability, maintainability, and delivery speed.
• Manage CI/CD pipelines and ensure best practices in observability, logging, metrics, and error tracking using tools such as Grafana, Datadog, and Bugsnag.
• Collaborate with DevOps partners to manage cloud infrastructure, primarily on AWS, and containerized environments using Docker and Kubernetes.
• Champion application security best practices across the development lifecycle.

Your Technical Toolkit

• PHP (Symfony): Deep experience with the Symfony ecosystem.
• Golang: Hands-on experience building and maintaining Go-based services.
• DDD (Domain-Driven Design): Knowledge and experience applying DDD principles in real projects.
• Cloud (AWS): Familiarity with key AWS services such as EC2, S3, RDS, etc.
• Containers: Skilled in Docker and Kubernetes for container orchestration and environment management.
• CI/CD: Proficiency with pipelines and tools like Concourse CI.
• APIs: Strong track record building well-documented, RESTful APIs.
• Monitoring & Observability: Experience with tools like Grafana, Datadog, and Bugsnag.You’ll Thrive If You…
• Enjoy the pace and adaptability of a startup environment with real-world delivery constraints.
• Have a product mindset, not just a technical one — and care about the “why” behind each feature.
• Are comfortable with technical leadership, mentoring others and guiding architecture and process decisions.
• Believe in continuous learning, take ownership, and are always looking to improve yourself and your work.
• Bring a pragmatic approach to refactoring legacy systems and moving toward modern, maintainable solutions.
• Communicate well, solve conflicts constructively, and help create alignment across teams.
• Think long-term, balancing delivery with sustainable technical choices.

What We Offer

• Competitive salary package
• Health insurance
• Fitness membership support
• All the tools you need to succeed
• Flexible work hours and remote-friendly culture
• A modern office in Lisbon for when you want a change of scenery
• A collaborative, motivated team in a dynamic industry
• Opportunities for learning, training, and growth