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For Companies At a Glance
- Tasks: Design and build cutting-edge integrations for SaaS apps using innovative technologies.
- Company: Join StackOne, a fast-growing tech company backed by top investors like Google Ventures.
- Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
- Other info: Diverse and inclusive workplace that values innovation and collaboration.
- Why this job: Be part of a dynamic team shaping the future of SaaS integrations with AI.
- Qualifications: 3+ years in full-stack development with experience in Cloudflare and AWS.
The predicted salary is between 36000 - 60000 £ per year.
About StackOne
StackOne is the universal integration layer for modern SaaS products. We’ve raised $24m in 2 years, and we’re backed by top tier investors like Google Ventures and Workday Ventures.
Our unified API platform lets vendors ship hundreds of native, white label integrations in days, not months, by abstracting away dozens of disparate third party APIs into a single, normalized interface. On top of those APIs, we provide AI Agent Actions so customers can build agentic workflows without wrangling OpenAPI specs.
StackOne sits behind the scenes as an embedded iPaaS: SOC 2 compliant, multi-tenant, and invisible to end users powering integrations for future-of-work SaaS categories such as HR, Compliance, and AI Agents.
Our customers are established B2B SaaS companies that:
- Sell to mid market and enterprise buyers
- Are building AI Agents in the near future
- Need deep, native integrations to win competitive deals and power their product
- Value time to integration over building connectors in house
We typically close OEM and embedded licensing deals, multi-year (1 to 3 year) contracts, five to seven figure TCV, with a strong land and expand model. Key buyer personas are the CPO and CTO.
Role overview
Join a tight-knit, fast-paced team of AI engineers pushing MCP to its limits and advancing the protocol across the ecosystem. You will build Disco.dev into the best way to integrate agents with SaaS apps, make MCP enterprise-ready through StackOne, and stay tightly aligned with the MCP community to adopt and influence the latest standards.
Key Responsibilities
- Design, build and operate MCP servers, transports and tools that connect agents to SaaS apps via StackOne and Disco.dev
- Productionise MCP for the enterprise: authn/authz, multi-tenancy, RBAC, audit logs, observability, SLIs and SLAs
- Ship on Cloudflare and AWS: Workers, Durable Objects, KV, R2, plus Lambda or containers, API Gateway, IAM and networking
- Define conformance, load and chaos tests for MCP servers to harden reliability and performance
- Coordinate with the MCP ecosystem: track proposals, contribute issues and PRs, write design notes and interop guides
- Translate real customer CUJs into protocol and product improvements in Disco.dev and StackOne
Requirements & Qualifications
Must have:
- 3+ years professional full-stack experience shipping production systems
- Hands-on experience building MCP servers or equivalent agent tool servers, including permissions and session management
- Strong Cloudflare experience: Workers, Durable Objects, KV or R2, build and deploy pipelines
- Strong AWS experience: one of Lambda, ECS or EKS, plus API Gateway, IAM, VPC networking and monitoring
- Proficiency with TypeScript or Node.js, and React or Svelte for developer portals and example UIs
- Experience designing agentic workflows: tool schemas, function calls, guardrails and evaluation
- Solid understanding of HTTP, WebSockets or SSE, OAuth 2.0, signed requests and webhooks
- Knowledge of other tools calling standards with understanding of their differences and trade-offs
Nice to have:
- Contributions to MCP or adjacent open-source projects
- Experience using Claude Code via CLI or SDK
- Experience with multi-tenant architectures, policy engines and fine-grained scopes
- Background with security and compliance controls in production environments
- Familiarity with GenAI evaluation, tool-calling patterns and safety rails
Tech Stack
TypeScript, Node.js, React, Cloudflare Workers, Durable Objects, KV, R2, AWS Lambda or containers, API Gateway, IAM, PostgreSQL, Redis, Webhooks, OAuth 2.0, OpenAPI, JSON Schema, Prometheus-class observability.
We believe diversity drives innovation. We encourage individuals from all backgrounds to apply. As an equal-opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all employees.
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MCP Engineer employer: StackOne Technologies Limited
Contact Detail:
StackOne Technologies Limited Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land MCP Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those related to MCP servers or integrations. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for interviews by practising common technical questions and scenarios related to the role. We recommend doing mock interviews with friends or using online platforms to get comfortable with the format and types of questions you might face.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team at StackOne.
We think you need these skills to ace MCP Engineer
Some tips for your application 🫡
Tailor Your Application: Make sure to customise your CV and cover letter for the MCP Engineer role. Highlight your relevant experience with Cloudflare and AWS, and don’t forget to mention any hands-on work with MCP servers or similar tools. We want to see how you fit into our world!
Show Off Your Skills: When detailing your experience, focus on specific projects where you've designed or built production systems. Use clear examples that showcase your proficiency in TypeScript, Node.js, and any other tech from our stack. This helps us understand what you bring to the table!
Be Authentic: Let your personality shine through in your application. We’re a tight-knit team, so we appreciate a bit of character! Share your passion for building integrations and how you’ve contributed to the community, especially if you’ve worked on open-source projects.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen on joining our team at StackOne!
How to prepare for a job interview at StackOne Technologies Limited
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, like TypeScript, Node.js, and AWS. Brush up on your Cloudflare experience too, as they’ll likely ask you about your hands-on experience with these tools.
✨Understand MCP and Agent Workflows
Familiarise yourself with the MCP protocol and how it integrates with SaaS applications. Be ready to discuss your experience designing agentic workflows and how you can contribute to making MCP enterprise-ready.
✨Prepare for Scenario-Based Questions
Expect questions that require you to think on your feet. Prepare examples of how you've handled production issues or designed systems under pressure. They might ask you to outline your approach to building reliable and performant MCP servers.
✨Show Your Collaborative Spirit
Since StackOne values teamwork, be prepared to discuss how you’ve collaborated with others in past projects. Highlight any contributions to open-source projects or how you’ve worked with cross-functional teams to achieve common goals.