AI Solutions Architect (MCP/JS)
Are you passionate about architecture, scalable distributed systems, and emerging AI technologies? We are looking for a Software Architect with strong expertise in Node.js and AI integration technologies to help build scalable engineering foundations for enterprise-wide MCP adoption.
This role combines architecture leadership, platform engineering, and hands-on development focused on reusable MCP integrations, AI orchestration, and enterprise architecture standards. At Sigma Software, you will work on technically challenging products, collaborate with experienced engineering teams, and help shape scalable solutions for a modern European FinTech company.
Customer
Our Customer is one of Europe's fastest-growing FinTech companies, delivering a comprehensive financial infrastructure platform for businesses. The company provides embedded financial services, including virtual cards, bank transfers, account management, and payment operations through scalable APIs and modern financial technology solutions. Operating in a high-scale and rapidly evolving environment, the Customer places strong emphasis on engineering excellence, platform scalability, and architectural consistency.
Project
The project focuses on building the engineering foundation for enterprise-wide MCP adoption across multiple product teams. The initiative aims to establish shared architecture standards, reusable TypeScript/Node.js libraries, SDKs, templates, and development practices that enable scalable and consistent MCP-compatible integrations.
As a Software Architect, you will lead the design of scalable MCP-based integration solutions, establish engineering standards, and develop reusable platform components for AI orchestration, context management, authentication, and service integrations. You will also contribute to defining integration approaches and architecture best practices across multiple engineering teams.
Key Technologies: TypeScript, JavaScript, Node.js, AWS, MCP, LLM Integrations, APIs, Distributed Systems, SDK Development, Microservices, AI Orchestration.
Responsibilities
Design and implement core MCP platform capabilities, including MCP clients, servers, tool invocation patterns, and integrations with existing backend services
Define reference architectures and engineering standards for MCP servers, tools, resources, schemas, authentication, context handling, and versioning
Build reusable TypeScript/Node.js libraries, SDKs, templates, and starter projects for product teams
Design shared capabilities around conversation state, agent state, context management, and orchestration workflows
Establish architectural guidance for selecting between MCP, A2A communication, traditional APIs, and service-to-service integration patterns
Collaborate across engineering teams to review solution designs and document best practices
Mentor engineers and provide technical leadership in AI integration and platform engineering initiatives
Ensure platform scalability, maintainability, security, and operational excellence
Define architecture vision and technical standards for enterprise-wide MCP adoption
Drive cross-team technical alignment and support strategic architecture decisions
Requirements
7+ years of production experience with JavaScript, TypeScript, and Node.js
2+ years of experience in software architecture, backend platform engineering, or technical leadership roles
Strong expertise in TypeScript and Node.js ecosystem development
Proven experience designing distributed systems, APIs, SDKs, frameworks, or developer platforms
Strong understanding of software architecture principles, interface design, versioning strategies, and reusable platform components
Practical experience with MCP clients, servers, tools, resources, and LLM tool invocation
Experience leading technical initiatives across multiple engineering teams
Hands-on experience with cloud platforms, preferably AWS
Experience defining scalable architecture standards and reusable engineering practices
Ability to translate business requirements into scalable technical solutions in high-scale environments
Upper-Intermediate or higher English level
Will be a plus:
Experience with A2A communication and agent orchestration platforms
Background in AI/ML platform engineering
Familiarity with FinTech products, payment systems, or embedded finance solutions
Experience contributing to architectural governance and engineering standards at scale
Personal Profile
Strong technical leadership and ownership mindset
Ability to work effectively in cross-functional and distributed teams
Proactive and solution-oriented approach
Passion for innovation and emerging AI technologies
Strong mentoring and knowledge-sharing skills
Ability to balance strategic architecture vision with hands-on engineering execution