Senior Full-Stack Developer

Hybrid in Lisbon·Full-time·Added 10 months ago

This job was published 10 months ago

InteractiveAI

5 open roles

Overview

Job details

  • €70,000 - €90,000 a year

    Gross, as stated in the ad.

  • Permanent contract

    Full-time hours.

  • Hybrid

    Office and home days — the ad has the split.

Requirements

  • Be near Lisbon for hybrid days

    No relocation package mentioned.

  • Have 5+ years of experience

    Mid-level role.

Pay & benefits

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)

The role

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.

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

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.

Requirements

What we're looking for

  • 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 have

  • 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

Hiring process

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

  1. Intro Call – 30 minutes to align on fit and expectations
  2. Take-Home Challenge – A practical task based on real-world engineering problems
  3. Technical Interview – Deep dive into software architecture, system design, and implementation skills
  4. Cultural and Values Interview – Exploration of motivation, communication style, and team alignment
  5. 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 — careers@interactive.ai

About InteractiveAI

InteractiveAI is an artificial intelligence company that develops and deploys AI-powered virtual assistants and automation solutions for enterprise clients. The company builds custom AI agents that handle customer service, internal operations, and data analysis for large organizations, with a focus on measurable ROI and seamless integration into existing workflows. While the company operates globally, its engineering and product teams are distributed, with a significant presence in Spain.

In Spain, InteractiveAI operates a technology hub in Madrid, which serves as a key development center for its AI platform. The company is known for a strong engineering culture, remote-friendly practices, and a product-led approach, making it an attractive destination for international engineers and developers looking to work on applied AI at scale. The Madrid office is a central part of the company's European operations, offering roles in engineering, DevOps, and full-stack development.

Industry
AI
Founded
2016
Employees
100–500
Headquarters
Madrid, Spain
All open roles at InteractiveAI
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