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UK Remote Job – Backend Engineer, Node.js, TypeScript at Nexoya
Backend Engineer at Nexoya building scalable Node.js/TypeScript services, GraphQL APIs, and advertising-platform integrations for its AI-powered marketing optimisation platform, including LLM/agent features. Deploys on Azure with Docker and Kubernetes, using MySQL and RabbitMQ. Remote within the EEA.
- Compensation
- Not disclosed
- Location
- United Kingdom
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- Not specified
- Category
- Backend
- Posted
Skills
Must have
- At least three years of backend engineering experience with Node.js and TypeScript
- Strong API design experience using GraphQL or REST
- Practical experience with MySQL and message brokers
- Experience deploying services with Docker, Kubernetes and a major cloud platform (Azure preferred)
- Strong problem-solving skills and an interest in discussing technical trade-offs in writing
- Commitment to producing clean, maintainable and well-tested code
- Fluency in English
Nice to have
- Experience with Google Ads, Meta advertising APIs or marketing attribution
- Production experience with AI, LLMs, agents, Anthropic/OpenAI APIs, MCP or RAG
- LLM evaluation, observability, data pipelines or AI coding tools such as Claude Code
- German language proficiency
Full description
Job Title: Backend Engineer
Employer: Nexoya
Job Type: Remote
Location: United Kingdom
Salary/Rate: Not Specified
UK Visa Sponsorship: Not Available
This Backend Engineer role focuses on building scalable backend services, API integrations and AI-powered features for Nexoya’s marketing optimisation platform. It offers end-to-end engineering ownership in an AI-first environment, with remote work available within the European Economic Area (EEA).
Description
- Build and maintain backend services using Node.js and TypeScript.
- Develop GraphQL APIs, advertising platform integrations and data ingestion systems.
- Design and deliver LLM- and agent-powered features, including an in-app AI assistant.
- Own backend features from design through deployment to production.
- Deploy and operate services on Azure cloud using Docker and Kubernetes.
- Build reliable data-processing systems using MySQL and RabbitMQ.
- Maintain clear API schemas, stable contracts and reliable integrations.
- Implement AI evaluation, monitoring, retrieval, tool calling and safety guardrails.
- Improve the agent framework, testing practices, code reviews and technical documentation.
- Participate in architectural decisions and rotating internal support duties.
Responsibilities
- Develop, test, deploy and maintain backend applications and services.
- Design and evolve GraphQL APIs and integrations with advertising platforms.
- Build and maintain data ingestion pipelines and message-driven services.
- Implement AI and agent-based capabilities using structured outputs, retrieval and tool calling.
- Monitor production services and improve reliability, performance and maintainability.
- Conduct code reviews and contribute to engineering standards and documentation.
- Collaborate with colleagues on technical decisions and communicate design trade-offs.
- Participate in internal support rotations and resolve technical issues.
Requirements
- At least three years of backend engineering experience with Node.js and TypeScript.
- Strong API design experience using GraphQL or REST.
- Practical experience with MySQL and message brokers.
- Experience deploying services with Docker, Kubernetes and a major cloud platform; Azure is preferred.
- Strong problem-solving skills and an interest in discussing technical trade-offs in writing.
- Commitment to producing clean, maintainable and well-tested code.
- Fluency in English.
- Desirable: Experience with Google Ads, Meta advertising APIs or marketing attribution.