Hasura DDN Integration Engineer
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- Contract: 3–6 months
- Rate: £550–£750 per day Outside IR35
- Location: Remote (UK-based). Preference for candidates based in North London, but flexible across the UK
- Start: ASAP
Are you a technically strong Hasura and GraphQL specialist ready to lead the integration layer of a major HR systems programme?
Our client is seeking a Hasura DDN Integration Engineer to design and deliver a centralised integration platform connecting a core HR system with several external services. The project requires expertise in Hasura, GraphQL, and microservices-based architectures, with a focus on building scalable and event-driven integrations across multiple systems.
This is a hands-on contract role, ideally suited to a senior integration engineer with strong experience in Hasura DDN (or Hasura v2), GraphQL API design, and complex system integrations.
The Role
Working within a multi-vendor delivery environment, the successful candidate will take ownership of the Hasura integration layer, designing and implementing the architecture that enables secure and reliable data exchange between systems.
Key responsibilities include:
- Setting up and configuring a Hasura DDN project, including GraphQL schema design and API access controls
- Building custom data connectors and integrating with third-party REST APIs
- Developing webhook handlers and event-driven workflows
- Implementing data transformation, mapping, and validation logic between systems
- Ensuring integrations include error handling, monitoring, and observability
- Producing technical documentation and supporting knowledge transfer to internal teams
What You’ll Bring
Our client is looking for a strong hands-on integration engineer with experience building scalable API and microservices architectures.
You will have:
- Hands-on experience with Hasura DDN / Hasura v3, or strong experience with Hasura v2 and GraphQL platforms
- Strong knowledge of GraphQL schema design, queries, mutations, and authentication patterns
- Experience building microservices or integration platforms
- Experience integrating third-party REST APIs and event-driven systems
- Experience designing webhook-based or event-driven architectures
- The ability to work autonomously and collaborate across multiple technical stakeholders in a complex delivery environment