LanguageWire

Full Stack Engineer, AI Tools & Integrations

LanguageWire

full-time

Posted on:

Location Type: Remote

Location: Spain

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Tech Stack

ASP.NETAzureCloudDockerJavaScriptKubernetesMicroservices.NETPostgresRabbitMQTypeScriptVue.js

About the role

  • Design and build AI agent tools: Create backend services and APIs that AI agents can invoke to query data, trigger workflows, and interact with internal and external systems.
  • Integrate with existing services and APIs: Connect agent tooling to LanguageWire’s internal platform APIs, third-party services, and databases.
  • Define tool schemas and contracts: Design clear, well-documented tool interfaces (function schemas, OpenAPI specs, MCP server definitions) that LLMs and orchestration layers can reliably consume.
  • Build agentic features and workflows: Implement end-to-end automated workflows where AI agents solve specific business cases across departments, from operations and finance to sales and project management.
  • Own your services end-to-end: From architecture and coding to deployment, monitoring, and maintenance (“You build it, you run it”).
  • Contribute to backend services and data layers: Extend existing .NET microservices and databases to expose the capabilities needed by AI tools.
  • Set up and improve CI/CD pipelines to ship reliably and frequently.
  • Apply DevOps and Operational Excellence best practices to ensure agent tools are observable, resilient, and secure.
  • Share knowledge with the team and help define how we build AI-powered products.

Requirements

  • Strong backend experience: C#, .NET Core / .NET 6+, ASP.NET Web API, microservices
  • Solid experience with relational databases (MSSQL and/or PostgreSQL), query design, schema design, performance
  • Proven ability to design and build REST APIs and integrate with third-party services and webhooks
  • Familiarity with async programming, event-driven architecture, and message queues (e.g., Azure Service Bus, RabbitMQ)
  • Some frontend exposure (Vue.js and/or TypeScript), enough to contribute when needed, but the focus here is backend
  • Practical understanding of LLM APIs (Anthropic, OpenAI, Azure OpenAI), calling them, managing context, handling responses
  • Familiarity with designing or consuming tool/function calling schemas, defining what an agent can invoke and how
  • Familiarity with MCP (Model Context Protocol) or similar agent-tool integration patterns (or eagerness to learn)
  • Understanding of security and authentication for exposed tool APIs (OAuth 2.0, API keys, rate limiting, input validation)
  • Observability mindset: logging, tracing, and monitoring tool invocations and agent interactions
  • A product mindset: you care about solving real business problems, not just completing tickets
  • Comfortable working with domain experts (non-technical stakeholders) to identify automation opportunities and translate them into technical solutions
  • Strong communication skills, English fluency required
  • Agile, collaborative, and opinionated in a constructive way
  • Hands-on DevOps experience: CI/CD pipelines, Docker, Kubernetes, cloud (Azure preferred)
  • Experience designing agentic workflows: chaining tool calls, handling state, and structuring multi-step automated processes
  • Familiarity with agent orchestration frameworks (e.g., LangChain, Semantic Kernel, AutoGen, or similar)
  • Experience with event-driven or workflow automation platforms (e.g., Azure Logic Apps, n8n, Temporal)
  • Knowledge of prompt chaining patterns and how to structure reliable, deterministic tool-calling behaviour in LLM pipelines
Benefits
  • Enjoy flat hierarchies, responsibility and freedom, direct feedback, and room to stand up for your own ideas
  • Internal development opportunities, ongoing support from your People Partner, and an inclusive and fun company culture
  • International company with over 300 employees. Offices in Copenhagen, Aarhus, Stockholm, Varberg, London, Leuven, Lille, Paris, Munich, Hamburg,, Sophia Antipolis, Atlanta, Finland and Valencia
  • For this role, we have a full-time FlexiWire@home option for remote work. Of course, you are always welcome at the office to collaborate and connect with your colleagues.
  • We take care of our people and initiate many social get-togethers from Friday Bars a to Summer or Christmas parties. We have fun!
  • Excellent location in cool and modern offices in the city center, with a great rooftop terrace and a view over the Town Hall Square
  • Private health insurance
  • Working in an international environment—more than 20 different nationalities
  • A dog friendly atmosphere
  • Big kitchen with access to organic fruits, nuts and biscuits and coffee.
  • Social area and game room (foosball table, darts, and board games)
  • Bike and car parking
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
C#.NET Core.NET 6+ASP.NET Web APImicroservicesrelational databasesREST APIsasync programmingevent-driven architectureLLM APIs
Soft Skills
strong communication skillsproduct mindsetcollaborativecomfortable working with domain expertsobservability mindsetAgileopinionated in a constructive way