Principal JavaScript/Node.js Engineer

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Sigma Software Group

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2002

💼 Consulting

🏥 Healthcare

🚘 Automotive

Consulting • Healthcare • Automotive

Sigma Software Group is a multinational company, established in 2002, that specializes in providing high-quality software development, graphic design, testing, and support services. The company focuses on delivering solutions across various industries such as automotive, telecommunications, aviation, advertising, gaming, banking, real estate, and healthcare. Sigma Software values professional growth, offers remote work opportunities worldwide, and caters to world-renowned clients like AstraZeneca, Scania, and SAS. The company emphasizes a culture of continuous education, mentorship, and flexible work environments, making it a preferred workplace for IT specialists aiming to work on complex solutions utilizing cutting-edge technologies. Sigma Software is committed to innovative solutions and engineering the future while also contributing to social causes such as charitable work in Ukraine.

📋 Description

• Design core MCP platform capabilities, including MCP clients, servers, tool invocation patterns, and integration with existing backend services • Define reference architectures and engineering standards for MCP servers, tools, resources, schemas, context handling, authentication, and versioning • Build reusable TypeScript/Node.js libraries, templates, and starter projects • Design shared capabilities around conversation state, agent state, context management, and orchestration • Define architectural guidance for choosing between MCP, A2A, traditional APIs, and service-to-service communication • Review designs across engineering teams, document best practices, mentor developers, and drive adoption of common standards • Enable product teams to independently build MCP servers using common architecture and reusable tooling • Establish consistent engineering standards for MCP integrations • Provide guidance on MCP, A2A, and traditional integration patterns • Scale MCP expertise and best practices across the engineering organization

🎯 Requirements

• Principal / Staff level backend or platform engineering experience • Strong TypeScript and Node.js expertise • Experience designing distributed systems, APIs, SDKs, frameworks, or developer platforms • Strong understanding of architecture, interface design, versioning, and reusable platform components • Practical experience with MCP clients, servers, tools, resources, and LLM tool invocation • Experience leading technical initiatives across multiple engineering teams • A2A and broader agent orchestration experience is a strong advantage

🏖️ Benefits

• Remote work • Occasional business trips to Barcelona and other European cities