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Benefex

Senior Backend Engineer, Python / .Net

Benefex

. Design and build features for Brain, Benifex’s flagship AI product for Reward Directors .

Posted 11/3/2026full-timeLondon • United KingdomSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in Python and backend development, with a strong focus on AI product features and responsible AI practices. Proven ability to collaborate with cross-functional teams and deliver high-quality, maintainable code in a commercial environment.

Highest-signal resume keywords
Commercial Production GenAI ExperiencePython Backend DevelopmentSQL ProficiencyAI Security AdvocacyExperience with CI/CD Pipelines

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
PythonBackend DevelopmentSQLClean Code PracticesDebuggingContainerisationMicroservicesEvent-Driven SystemsAI Coding AssistantsA2A Integrations
Soft Skills
CollaborationProactive CommunicationMentoring
Tools & Technologies
LangfuseGoogle Pub/SubRedisGrafanaCloud Deployment
Industry Keywords
AI Native EngineeringObservabilityAgentic OrchestrationRAG-Based SolutionsMCP

Tech Stack

Tools & technologies
CloudGoogle Cloud PlatformGrafanaJavaMicroservicesPythonRedisSDLCSpringSpring BootSpringBootSQL.NET

About the role

Key responsibilities & impact
  • Design and build features for Brain, Benifex’s flagship AI product for Reward Directors
  • Use Python/.NET engineering expertise to understand the Benefits product and APIs
  • Own shipped quality by testing work, fixing defects, and improving team practices
  • Write clear, well-structured code and provide actionable pull-request feedback
  • Improve code accessibility, performance, security, quality, and maintainability
  • Strengthen alerts and runbooks and improve observability
  • Help resolve production issues and incidents alongside a senior engineer
  • Collaborate with Product, Design, and Engineering colleagues to achieve the right outcomes
  • Share progress proactively
  • Work with remote teams, including Java Spring Boot engineers, to deliver cohesive solutions
  • Support onboarding of new engineers
  • Use and evolve AI-assisted development practices within Benifex’s AI-first SDLC

Requirements

What you’ll need
  • Commercial production GenAI experience (6 months+)
  • Experience using MCP, orchestrating multiple agents, RAG-based solutions, evaluations, and agentic observability with Langfuse
  • Advocacy for AI security and responsible AI
  • Track record of delivering features end-to-end
  • Solid commercial backend development experience with Python
  • Confidence working with SQL
  • Knowledge of clean, maintainable code and non-functional concerns including performance, security, and testability
  • Comfortable debugging and diagnosing issues in running systems
  • Exposure to containerisation and CI/CD pipelines
  • Awareness of agentic orchestration, microservices, and event-driven systems
  • Experience collaborating with cross-functional and remote colleagues
  • Practical experience with AI coding assistants such as Claude Code, Copilot, or Cursor
  • Genuine interest in AI Native engineering practices
  • Bonus: A2A integrations
  • Bonus: Google Pub/Sub and Redis
  • Bonus: Cloud deployment and scaling experience, particularly GCP
  • Bonus: Observability tools such as Langfuse and Grafana
  • Bonus: Mentoring or supporting junior engineers
  • Must be based in the UK, Ireland, Germany, or the Netherlands
  • Visa sponsorship is unavailable

Benefits

Comp & perks
  • Tech setup of your choice (MacBook Pro or equivalent, monitors, etc.)
  • £/€800 annual learning budget
  • Two hours per week as ‘Focus Fridays’
  • Flexible work setup
  • 25 days holiday plus your local bank holidays
  • Your birthday off
  • Two half day wellbeing days
  • Healthcare cash plan
  • Employee Assistance Plan with 24/7 365 support
  • Income Protection (75%)
  • Life assurance (4x salary)
  • Pension scheme
  • Enhanced parental leave package: 26 weeks fully paid maternity leave and 4 weeks fully paid paternity leave
  • £50 monthly allowance via Benifex card
  • Quarterly in-person attendance at the UK HQ