Senior Full-Stack Developer

What You’ll Do

As a Senior Full-Stack Developer at InteractiveAI, you will build core features across both the frontend and backend of our platform-shipping elegant interfaces, robust APIs, scalable services, and reliable tooling used by enterprise customers and internal teams.

This is a hands-on, high-ownership engineering role: you will architect systems, write production-grade code, design efficient data flows, and ship end-to-end features that directly shape our product experience.

• Design, architect, and implement backend services, microservices, and internal tooling
• Build modern, responsive, and performant frontend applications using React, TypeScript, and Tailwind
• Develop and maintain RESTful and GraphQL APIs that power key platform functionalities
• Integrate third-party services, authentication systems, and enterprise connectors
• Collaborate with product and design to craft intuitive user experiences and smooth interaction flows
• Deploy and manage containerized applications using Docker and Kubernetes
• Work with databases such as Postgres, Redis, and/or ClickHouse-handling schema design, migrations, and query performance
• Implement and maintain CI/CD pipelines, testing frameworks, and release workflows
• Troubleshoot production issues, performance problems, and service reliability incidents
• Take full ownership of features from design to production, including documentation and monitoring

What We’re Looking For

We’re looking for a highly skilled engineer with strong full-stack fundamentals, proven delivery, and the ability to build elegant, scalable systems across the entire web stack.

Minimum Requirements:

• 5+ years experience building and deploying full-stack applications in production
• Strong proficiency with TypeScript, JavaScript, and modern frontend frameworks (React required)
• Backend experience with Node.js, Python, or similar server-side technologies
• Experience designing and consuming RESTful and GraphQL APIs
• Hands-on experience with Docker, containers, and Kubernetes deployments
• Strong understanding of relational and/or analytical databases (Postgres, Redis, ClickHouse)
• Experience working with cloud providers (AWS, GCP, or Azure)
• Familiarity with Infrastructure as Code tools such as Terraform
• Solid grasp of CI/CD pipelines, automated testing, and release management
• Excellent communication skills and ability to collaborate in cross-functional teams

Nice-to-Haves:

• Experience with multi-tenant SaaS architectures or high-throughput systems
• Experience with state management libraries (Zustand, Redux, Recoil)
• Familiarity with event-driven architectures and message queues
• Exposure to enterprise security best practices (IAM, VPC, encryption)
• Contributions to open-source or active involvement in tech communities

What You’ll Get

• Competitive base salary (€70,000/yr to €90,000/yr) + performance bonuses
• Access to equity/share plan as it rolls out
• Private health insurance
• Flexible work setup + travel when needed (ideally Hybrid in Lisbon or Madrid)
• 23 days PTO (excluding local public holidays)

Who You Are

• Proactive & Resourceful: You identify problems early and drive solutions independently.
• High-Ownership: You treat the platform and codebase as your own and deliver high-quality work consistently.
• Execution-Driven: You thrive in a fast-paced startup environment and enjoy shipping user-facing features.
• Collaborative: You communicate clearly, engage well with product/design/engineering peers, and mentor others when needed.

Interview Process

We keep our process focused and respectful of your time. Most candidates complete it in 2-3 weeks. Here’s what to expect:

• Intro Call - 30 minutes to align on fit and expectations
• Take-Home Challenge - A practical task based on real-world engineering problems
• Technical Interview - Deep dive into software architecture, system design, and implementation skills
• Cultural and Values Interview - Exploration of motivation, communication style, and team alignment
• Offer - Final conversation and offer

We’re forming a team of builders - people who care about impact, quality, and growth. If that’s you, let’s talk - [email protected]