Full Stack Engineer at LanguageWire

Setup: Remote - Spain, Hybrid
Type: Full-time
Posted: Apr 10, 2026

Description

LanguageWire is seeking a Full Stack Engineer to join their Core Platform Team. This role involves designing and delivering backend-heavy services to enable AI agents to perform tasks such as querying internal systems, interacting with third-party APIs, automating workflows, and solving business problems. The engineer will collaborate with product managers and domain experts to create agentic solutions and contribute to the overall platform infrastructure.

Required Skills

C#
.NET Core
.NET 6+
ASP.NET Web API
microservices
relational databases
MSSQL
PostgreSQL
query design
schema design
performance optimization
REST APIs
third-party service integration
webhook integration
async programming
event-driven architecture
message queues
Azure Service Bus
RabbitMQ
frontend exposure
Vue.js
TypeScript
DevOps experience
CI/CD pipelines
Docker
Kubernetes
cloud computing
LLM APIs
Anthropic
OpenAI
Azure OpenAI
MCP
product mindset
English fluency
Agile methodology

Additional Information

Preferred Qualifications: Familiarity with designing or consuming tool/function calling schemas, defining what an agent can invoke and how
Understanding of security and authentication for exposed tool APIs (OAuth 2.0, API keys, rate limiting, input validation)
Experience designing agentic workflows: chaining tool calls, handling state, and structuring multi-step automated processes
Observability mindset: logging, tracing, and monitoring tool invocations and agent interactions
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