Senior Full Stack Engineer - Interaction Squad (AI)

Location: Fully remote, but candidates must be based in Spain

Company

hirify.global is an online services marketplace connecting customers with professionals across more than 1,000 categories in nine countries. The company is transitioning from lead generation to a subscription-based marketplace platform.

What you will do

• Build performant APIs, backend services, and frontend experiences with Python and React/TypeScript.
• Design and evolve consumer services for projects, contacts, interactions, billing, messaging, and professional-side integrations.
• Integrate communication platforms such as Twilio and GetStream for messaging, calling, and notifications.
• Design and ship AI-powered features including call summaries and conversation insights.
• Measure conversion, engagement, opt-in rates, and customer satisfaction through experimentation and market rollouts.
• Own reliability through testing, observability, incident response, architecture improvements, mentoring, and adoption of AI-assisted development tools.

Requirements

• Must be based in Spain for the fully remote role.
• At least 3 years of production experience with Python and at least 3 years of recent experience with React.
• Comfort working across the stack, ideally with a 50/50 frontend/backend split; a 30/70 split in either direction may also be considered.
• Experience building scalable, high-performing, consumer-facing web applications.
• Production MySQL experience and strong SQL skills; familiarity with NoSQL datastores and ideally migrating data between them.
• Experience designing, building, testing, and documenting APIs used by other teams, clients, and mobile applications.
• Strong product mindset with interest in user experience, conversion, and the end-to-end customer journey.
• Strong organisational and communication skills, with the ability to achieve goals in an innovative, fast-paced environment.
• Comfort using AI-assisted development tools such as Claude Code or Cursor in daily work.

Nice to have

• Experience with Twilio, GetStream, real-time messaging, or notification systems.
• Production experience building AI features with OpenAI or Anthropic APIs, including prompt and schema design, evaluation, and PII handling.
• Experience working with native iOS or Android apps, deep links, and push notifications.
• Experience with event-driven architectures, AWS, SQS or RabbitMQ, and SNS or Kafka.
• Experience with Elasticsearch, DynamoDB, or similar data stores.
• Experience with Heap, Amplitude, GA4, Datadog, or incident.io.

Culture & Benefits

• Fully remote work from Spain.
• Work in a small, highly agile interaction squad with ownership of the consumer marketplace experience.
• Collaborate with product, design, data, and mobile engineering teams.
• Contribute to architecture and technology decisions during the marketplace transformation.
• Work in a diverse and inclusive environment focused on development, belonging, and customer impact.

Hiring process

• Screening call with a Talent Partner lasting 30 minutes.
• Hiring Manager interview lasting 30–45 minutes, followed by a 60-minute technical task.
• Values interview lasting 45 minutes.