Full Stack JavaScript Developer - Contract
Posted Today by iO Associates - UK/EU
£525 Per day
Outside
Hybrid
Manchester, England, United Kingdom
Summary: The role of Full Stack JavaScript Developer involves leading the development of a new payments platform for a SaaS start-up in the B2B retail sector. The position requires strong expertise in both frontend and backend technologies, with a focus on building scalable APIs and microservices. The developer will collaborate closely with the CTO and product team to deliver innovative solutions in a greenfield environment. This contract position offers a competitive daily rate and the opportunity to influence the project's architecture and implementation.
Key Responsibilities:
- Lead the development of a new payments platform for B2B retail clients.
- Collaborate with the CTO and product team to design and implement features.
- Design, develop, and document scalable APIs and microservices.
- Integrate third-party services, particularly Stripe.
- Manage PostgreSQL databases and design relational data models.
- Enforce TypeScript standards and testing practices.
- Deploy applications in containerized environments using AWS.
- Handle security, authentication, and role-based access at scale.
- Work independently and make architectural decisions as needed.
- Participate in Agile teams and communicate effectively with stakeholders.
Key Skills:
- 5+ years of full stack JavaScript experience.
- Strong commercial experience with Vue and Node.
- Ability to design and develop scalable APIs and microservices.
- Experience with Stripe integration.
- Proficient in managing PostgreSQL databases.
- Strong fundamentals in TypeScript.
- Familiarity with Docker and AWS.
- Experience in security and authentication practices.
- Ability to work independently and make architectural decisions.
- Experience in Agile methodologies.
Salary (Rate): £525.00/daily
City: Manchester
Country: United Kingdom
Working Arrangements: hybrid
IR35 Status: outside IR35
Seniority Level: Mid-Level
Industry: IT
Full Stack JavaScript Developer - Contract
Manchester hybrid (3 days onsite per week)
Outside IR35
£450 - £525 per day
Contract Length: 6 months
I'm working with a SaaS start-up in the B2B retail space they've just closed Series A and are kicking off a new payments platform for their client base. They're building smart tools for retailers to manage suppliers, stock, and payments all in one place. They need a strong full stack JavaScript contractor to help lead this greenfield build. You'll be working closely with the CTO and product team to bring the new feature to life.
The stack:
- Frontend: Vue3, TypeScript
- Backend: Node.js, PostgreSQL, Stripe API, GraphQL exposure, RESTful API design
- Infrastructure: Docker, AWS, CI/CD Pipelines
What they need from you:
- 5+ years of full stack JavaScript experience with strong commercial use of Vue and Node
- Ability to design, develop and document scalable APIs and microservices
- Comfortable integrating third-party services (Stripe experience essential)
- Experience managing PostgreSQL databases and designing relational data models
- Strong TypeScript fundamentals and ability to enforce typing and testing standards
- Familiar with containerised environments and deploying via AWS
- Confident in handling security, authentication and role-based access at scale
- Ability to work independently and make architectural decisions when needed
- Experience in Agile teams and communicating directly with product/CTO maintainable code
Why this one's worth a look:
- Fully greenfield project
- Direct influence over how it's built
- Outside IR35
- Clean, modern stack
- Fast feedback loop and minimal red tape