Senior Full Stack Engineer – Interaction Squad

This is a fully remote position, open to applicants in Spain.

📋 Description

• Develop efficient APIs, services, and front-end solutions utilizing Python and React/TypeScript.

• Design, construct, and enhance consumer services that support projects, contacts, and interactions.

• Integrate consumer services with billing, messaging, and professional product components.

• Incorporate third-party communication platforms like Twilio and GetStream for messaging, calling, and notifications.

• Create and launch AI-driven features, including call and conversation summaries.

• Analyze conversion rates, engagement metrics, opt-in statistics, and customer satisfaction to inform decision-making.

• Collaborate with product, design, data, and mobile engineering teams.

• Deliver prototypes, A/B testing, and phased rollouts by market.

• Ensure reliability through tested code, observability, incident investigation, and resolution.

• Enhance the codebase, data model, and overall architecture.

• Mentor and provide support to other engineers.

• Assess AI tools and frameworks while facilitating their adoption with appropriate safeguards.

• Refine internal processes and stakeholder collaboration.

⛳️ Requirements

• Must reside in Spain.

• Over 3 years of experience with Python in a production setting.

• More than 3 years of recent experience with React.

• Ideally a 50/50 split between front-end and back-end work; open to a 30/70 split in either direction.

• Experience in developing scalable, high-performance, consumer-oriented web applications.

• Proficient in production MySQL and possess strong SQL skills.

• Familiarity with NoSQL databases.

• Experience in migrating data across different datastores.

• Proven ability in designing, building, testing, and documenting APIs for use by other teams and clients, including mobile applications.

• Strong product-oriented mindset with an interest in user experience, conversion, and the complete customer journey.

• Excellent organizational skills.

• Capability to meet goals in a highly innovative and fast-paced environment.

• Strong communication abilities.

• Comfortable using AI-assisted development tools such as Claude Code and Cursor.

• Desired: experience with Twilio, GetStream, and real-time messaging and notification systems.

• Desired: experience with production AI features utilizing OpenAI or Anthropic LLM APIs, including prompt and schema design, evaluation, and PII management.

• Desired: experience building alongside or for native iOS/Android applications, including deep links and push notifications.

• Desired: familiarity with event-driven architectures, AWS, SQS/RabbitMQ, SNS/Kafka.

• Desired: experience with ElasticSearch, DynamoDB, or similar data storage solutions.

• Desired: knowledge of experimentation and product analytics tools such as Heap, Amplitude, and GA4.

• Desired: experience with cloud monitoring and incident management tools like Datadog and incident.io.

🏝️ Benefits

• Genuine ownership, responsibility, and the chance to influence commercial strategy.

• Opportunity to participate in technology decisions and shape architectural direction.

• Mentorship and knowledge-sharing opportunities.

• Fully remote work option within Spain.

• An inclusive environment that values diversity, equity, inclusion, and belonging.

• Opportunities for hiring, retaining, and developing a globally diverse workforce.