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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Engineer - **Company:** LanguageWire - **Location:** Valencia, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** .NET Framework, Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Microsoft Azure, C Sharp (Programming Language), Software Quality, Code Review, Continuous Delivery, Continuous Integration, Relational Databases, DevOps, Programming Tools, Distributed Systems, Key Management, PostgreSQL, Machine Learning, Microsoft SQL Server, OAuth, Performance Tuning, Software Architecture, Queueing Systems, RabbitMQ, TypeScript, Management of Software Versions, Web Applications, Azure Service Bus, Data Logging, .NET Core, Istio, Multi-Agent Systems, Database Optimization, Asp.net Web Api, Backend, Vue.js, Event Driven Architecture, Kubernetes, Front End Software Development, Api Gateway, Restful APIs, Dynatrace, Api Management, Docker, Microservices - **Published:** June 14, 2026 - **Apply:** https://es.indeed.com/viewjob?jk=3569b90c721113ac ## About the Role Do you have experience in Scalability?, Do you have a Bachelor's degree?, * 5+ years of backend engineering experience in production environments, with deep expertise in C#, .NET Core / .NET 8+, ASP.NET Web API, and microservices architecture. * Proven track record of owning and evolving production services: schema migrations, API versioning, backward compatibility, and long-lived service maintenance. * Strong experience with distributed systems concepts: event-driven architecture, message queues (Azure Service Bus, RabbitMQ), sagas, idempotency, and eventual consistency. * Strong experience with AI developer tools (Using and building custom agents, skills, instructions) * Deep proficiency with relational databases (MSSQL and/or PostgreSQL): complex query design, schema design, indexing strategies, and performance tuning. * Demonstrated experience making and documenting architectural decisions (ADRs, system design, trade-off analysis) with the ability to defend and adapt your choices. * Hands-on DevOps experience: CI/CD pipelines, Docker, Kubernetes, Azure - with the mindset that owning deployment and operations is part of the engineer's job. * Experience designing robust, versioned REST APIs consumed by multiple teams, including security considerations (OAuth 2.0, API key management, rate limiting). * Some frontend exposure (Vue.js and/or TypeScript) - enough to contribute when needed, but the primary focus here is backend and platform. * A track record of mentoring and uplifting junior engineers - through code reviews, design sessions, and raising the quality bar organically. * Strong communication skills and the ability to articulate technical decisions to both engineers and non-technical stakeholders. English fluency required. * Agile, collaborative, and opinionated in a constructive way - you push back when needed and bring others along. This will make you stand out * Experience with workflow automation frameworks (Temporal, Inngest or similar). * Deep observability mindset: structured logging, distributed tracing (OpenTelemetry), alerting strategies, and SLO/SLA ownership for platform services. * Experience with service mesh, API gateway patterns, or platform engineering practices at scale. ## Description * Own and evolve foundational services: Take end-to-end ownership of platform service driving their architecture, reliability, and roadmap. * Lead backend architecture decisions: Author architecture decision records, define service boundaries, and ensure services are designed for scalability, resilience, and long-term maintainability. * Design and enforce API contracts: Define and maintain clean, versioned, well-documented REST APIs consumed by internal teams and, increasingly, by AI agents. * Drive technical quality: Own non-functional requirements - performance, observability, security, and availability - across the services you lead. * Own your services end-to-end: From architecture and coding to deployment, monitoring, and on-call support ("You build it, you run it"). Technical leadership & team growth * Mentor and upskill the team: Support mid-level and junior engineers through code reviews, pairing, and hands-on architectural guidance. * Set and raise the engineering bar: Champion best practices in testing, code quality, incident response, and continuous delivery across the team. * Drive DevOps and operational excellence: Own CI/CD pipelines, deployment reliability, and ensure platform services are observable, resilient, and secure. * Collaborate cross-functionally: Work with product managers and domain experts across the business to shape the platform roadmap and translate real needs into sound technical solutions. In one year, you'll know you were successful if… * The core platform services you own are more reliable, better documented, and better understood across the organization than when you joined. * You have led at least one significant architectural improvement that measurably improved scalability, resilience, or developer experience for dependent teams. * Your APIs and tool interfaces are trusted by both internal engineers and the AI orchestration layer - well-defined, stable, and easy to consume. * Engineers on the team are measurably better for having worked alongside you - through code reviews, pairing, and the standards you've raised., "As a Senior Full Stack Engineer at LanguageWire, my day is dynamic and collaborative, particularly within the Machine Learning team. I work closely with Machine Learning Engineers to integrate advanced AI capabilities into our web applications and APIs, aiming to enhance customer experiences through innovative features. I also collaborate with other development teams to ensure seamless integration and alignment of our technology solutions, fostering continuous learning and driving the evolution of LanguageWire's technology." ## Related Videos - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Rate-limiting using eBPF and Istio: How to protect your SaaS customers from themselves](https://www.wearedevelopers.com/videos/100220-rate-limiting-using-ebpf-and-istio-how-to-protect-your-saas-customers-from-themselves) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Get started with securing your cloud-native Java microservices applications](https://www.wearedevelopers.com/videos/123-get-started-with-securing-your-cloud-native-java-microservices-applications) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)