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Parser

Senior Backend Engineer, Python

Parser

. Design and build Python backend services and APIs for search quality tooling, including a tool for collecting human relevance judgements .

Posted 10/16/2026full-timeRemote • SpainSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in Python backend development, including building REST APIs and integrating AI features. Proficient in CI/CD practices, testing disciplines, and cloud platforms, with a focus on delivering reliable and user-centric solutions.

Highest-signal resume keywords
Python Backend DevelopmentREST API DevelopmentCI/CD Pipeline ExecutionTest-Driven DevelopmentCloud Platform Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
PythonREST APIsSQLNoSQLCI/CDTest-Driven DevelopmentSOLID PrinciplesData IntegrationAI Feature IntegrationProduction Services
Soft Skills
Strong Communication SkillsCollaborative Approach
Tools & Technologies
Microsoft AzureElasticsearchKafkaVersion ControlContainerisation
Industry Keywords
Ecommerce SearchA/B TestingRanking MetricsOffline EvaluationMedallion-Style Data Pipelines

Tech Stack

Tools & technologies
AzureCloudElasticSearchKafkaNoSQLPythonSQL

About the role

Key responsibilities & impact
  • Design and build Python backend services and APIs for search quality tooling, including a tool for collecting human relevance judgements
  • Review and refactor the existing offline evaluation tool for on-demand execution in the CI/CD pipeline
  • Translate product requirements into well-structured, maintainable, test-driven code
  • Integrate services with the shared data platform, client APIs and search infrastructure
  • Support AI and LLM-enabled features with AI engineers, including automated accuracy and reliability checks
  • Collaborate with product, design, data science and Search colleagues to turn prototypes into production releases
  • Support production systems, resolve incidents, and document decisions and trade-offs
  • Share work through documentation, demonstrations and incremental pull requests
  • Own deliverables within agreed architecture and engineering practices
  • Experiment with real data, test assumptions and iterate using evidence
  • Design reliable, clear and adoptable tools
  • Deliver usable value early while building evolvable solutions

Requirements

What you’ll need
  • 6+ years of professional experience in backend or software engineering
  • Strong Python skills, including building maintainable production services and REST APIs
  • Experience reviewing, refactoring and productionising existing code for reliable pipeline execution
  • Good testing discipline across application and data components, including test-driven development
  • Understanding of clean design principles such as SOLID
  • Experience with CI/CD, version control and containerisation
  • Experience with on-demand or temporary environments
  • Experience with a major cloud platform, ideally Microsoft Azure
  • Understanding of security, scalability and observability for production services
  • Proficiency with SQL and NoSQL databases
  • Experience integrating services with data pipelines, APIs and existing applications
  • Exposure to integrating LLM-based or other AI features into backend services, including validation of model outputs
  • Proven ability to ship iterative, user-focused solutions with attention to reliability and security
  • Strong written and verbal communication skills
  • Collaborative approach to multidisciplinary product delivery
  • Nice to have: experience in retail or ecommerce search, Elasticsearch or another production search platform
  • Nice to have: familiarity with offline evaluation, A/B testing or ranking metrics such as nDCG
  • Nice to have: experience with event streaming such as Kafka or medallion-style data pipelines
  • Nice to have: experience building internal tools for rating or annotation

Benefits

Comp & perks
  • A highly competitive compensation package
  • Medical insurance
  • Opportunity to join an organization with triple-digit growth
  • Opportunity to form part of a multicultural community of tech experts
  • Flexible remote work