Backend Engineer

• Handle end-to-end data extraction workflows across complex websites
• Ensure complete coverage, accuracy, and reliable delivery of structured datasets
• Use available tools and custom workflows to accelerate data collection, validation, and task execution
• Extract data reliably from dynamic and interactive web sources, adapting to JavaScript-rendered content and changing site behavior
• Enforce data quality through validation checks, cross-source consistency controls, formatting specifications, and systematic verification
• Scale scraping operations for large datasets using efficient batching or parallelization
• Monitor failures and maintain stability against minor site structure changes
• Use tools such as Apify, OpenRouter, and other technologies alongside technical expertise

Senior Python Data Scraping Engineer, Freelance

• Own end-to-end data extraction workflows across complex websites
• Ensure complete coverage, accuracy, and reliable delivery of structured datasets
• Use tools and custom workflows to accelerate data collection, validation, and task execution
• Extract data reliably from dynamic and interactive web sources, adapting to JavaScript-rendered content and changing site behavior
• Enforce data quality through validation checks, cross-source consistency controls, formatting specifications, and systematic verification
• Scale scraping operations for large datasets using efficient batching or parallelization
• Monitor failures and maintain stability against minor site structure changes
• Apply Python, web scraping, data extraction, and data processing expertise to Tendem project workflows

Senior Python Data Scraping Engineer – Freelance

• Design realistic and challenging coding tasks involving feature implementation and bug fixes.
• Create tasks that reflect authentic backend engineering workflows and practical software development challenges.
• Develop deterministic verifiers that accept reasonable valid solutions and reject incorrect implementations.
• Build and validate solutions using backend programming languages such as Java, Node.js, Go, Rust, TypeScript, Python, or C++.
• Develop tasks involving scalable services, APIs, debugging, performance optimization, and automated testing.
• Review code quality, maintainability, correctness, and adherence to technical requirements.
• Design evaluation criteria that distinguish robust solutions from superficially plausible implementations.
• Incorporate security considerations into tasks and verifiers where applicable.
• Document assumptions, expected behavior, edge cases, and validation requirements.
• Apply independent technical judgment throughout the task development and review process.

Software Engineer – Backend, AI Code Evaluation

• Build and maintain the Django backend powering the consumer dashboard and B2B platform
• Develop APIs for the consumer dashboard and customer reporting
• Improve performance and reliability in Celery and RabbitMQ pipelines
• Integrate third-party services such as payment providers and identity providers, including Stripe and WorkOS SSO
• Perform light frontend work using HTMX and occasional React components
• Own features from initial development through production follow-up
• Participate in code reviews, both giving and receiving
• Work directly with the founders on product and technical direction
• Pick up real work during the first week

Senior Python Engineer

• Design, build, and operate backend services and data-driven applications supporting core business workflows
• Build and maintain scalable backend services, APIs, and data pipelines using Python and SQL
• Develop data ingestion workflows using APIs and batch processing
• Replace manual and spreadsheet-driven processes with automated systems, internal tools, and dashboards
• Contribute to server-rendered frontend development using HTML, HTMX, and Jinja
• Improve testing, performance, security, monitoring, and data quality
• Troubleshoot production issues
• Contribute to architecture decisions and technical planning
• Take ownership of projects from development through deployment
• Collaborate with product, data, and operations teams

Senior Full-Stack Engineer – Python, AWS

• Build and maintain subscription, renewal, and credit logic in a TypeScript service
• Own webhook reliability and payment-event correctness end to end
• Work with payment processor and orchestration APIs — auth/capture, refunds, retries
• Write automated tests alongside the code; partial credits and multi-cycle renewals have too many edge cases for manual QA
• Occasional light React work where your APIs meet the checkout screens

Backend Engineer jobs in Costa Rica

Senior Python Data Scraping Engineer, Freelance

Senior Python Data Scraping Engineer – Freelance

Software Engineer – Backend, AI Code Evaluation

Senior Python Engineer

Senior Full-Stack Engineer – Python, AWS

Backend Engineer – Payments