Senior Fullstack Developer

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EX Squared

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2000

💼 Consulting

🤖 Artificial Intelligence

🤝 B2B

Consulting • Artificial Intelligence • B2B

EX Squared is a digital product and experience consultancy that helps enterprises move AI and digital initiatives from ambition into production. Since 2001 the firm has delivered strategy, UX/UI and multi-channel digital experiences plus engineering and IT infrastructure work, and specializes in GenAI, machine learning, computer vision, and NLP. EX Squared is a certified Optimizely and Sitecore partner and focuses on building enterprise-scale digital products and advanced AI-driven solutions for large B2B clients.

📋 Description

• Build and maintain scalable backend services and REST APIs using Python • Develop responsive frontend applications using React and TypeScript • Build application interfaces and services that surface, validate, and resolve issues across complex and data-intensive systems • Work with data originating from data lakes, ETL processes, validation logic, and model outputs at the application layer • Work with PostgreSQL, including database migrations and performance-sensitive queries • Package and manage applications using Docker • Work within existing GraphQL environments and support migrations toward REST-based architectures when appropriate • Use AI-assisted development tools to accelerate implementation while critically evaluating generated solutions for maintainability and scalability • Collaborate directly with engineering stakeholders to clarify functional and non-functional requirements • Work effectively within terminal-centric Mac/Linux development environments • Contribute technical perspectives and challenge short-term solutions when a more scalable or maintainable approach is required

🎯 Requirements

• 5–7 years of full-stack software development experience • Strong production experience with Python and frameworks such as FastAPI or Flask • Strong experience with TypeScript and React • Solid understanding of PostgreSQL, relational databases, and database migrations • Strong experience designing and working with REST APIs • Experience working with GraphQL-based applications or APIs • Demonstrated experience building or maintaining data-heavy applications involving large datasets or performance-sensitive application queries • Hands-on experience using AI-assisted development tools such as Claude Code, Codex, GitHub Copilot, or similar technologies • High comfort working in Mac/Linux environments using terminal-based workflows, Bash, and Makefiles • Strong system design and software engineering fundamentals • Ability to hold and defend technical opinions while remaining pragmatic and delivery-focused • Strong communication and stakeholder collaboration skills • Advanced English proficiency, both written and spoken • Experience with S3-backed data lakes and AWS Athena • Exposure to Trino/Presto, BigQuery, Spark SQL, or similar data technologies • Familiarity with DAG-based orchestration tools such as Airflow, Dagster, Prefect, or AWS Step Functions • Data engineering exposure, including ETL pipelines, advanced SQL, data validation, or query optimization • Experience with Redis or DynamoDB • Familiarity with Nx, Poetry, UV, or other modern package management and monorepo tooling • Experience with AWS Bedrock or similar AI/LLM platforms and SDKs • Experience with marketing data structures, campaign management APIs, or digital advertising metrics • Eligibility to apply is limited to candidates currently residing in Latin America

🏖️ Benefits

• Competitive compensation in USD • 100% remote work across LATAM • Access to learning platforms and professional development opportunities • Flexible work environment • Collaborative and multicultural teams • Career growth opportunities within a fast-growing organization