We are looking for an experienced Senior Software Engineer to join our team on an initial 3-month contract to support, maintain and further develop an existing SaaS application.
This is a hands-on technical role requiring a minimum of 5 years’ relevant commercial software engineering experience, with a strong focus on backend systems, data integrity, application reliability and deployment.
About the role
We are looking for an experienced Senior Software Engineer to join our team on an initial 3-month contract to support, maintain and further develop an existing SaaS application.
This is a hands-on technical role requiring a minimum of 5 years’ relevant commercial software engineering experience, with a strong focus on backend systems, data integrity, application reliability and deployment.
Key responsibilities
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Trace processing across APIs, services and workers, and manage asynchronous operations, failures and cleanup correctly
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Design, maintain and optimise PostgreSQL databases, including transactions, concurrency control, constraints, triggers, functions, indexing and safe schema migrations
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Design reliable background processing, including job ownership, ordering, retries, deduplication and recovery
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Manage application and database releases while maintaining backward compatibility and protecting existing project data
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Implement data versioning, provenance, cache reuse and invalidation strategies across application releases
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Manage AWS environments including ECS/Fargate, Docker, load balancers, CloudWatch, IAM and CI/CD
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Design and maintain end-to-end, integration and regression tests across database, background processing, concurrent and multi-user workflows
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Design and maintain secure multi-tenant access controls across the SaaS platform
About you
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Minimum 5+ years’ relevant commercial software engineering experience
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Strong Node.js / JavaScript backend engineering experience
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TypeScript experience is advantageous
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Deep PostgreSQL experience
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Strong experience with background processing and distributed systems
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Experience with backward-compatible application and database releases
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Understanding of data versioning, provenance and cache invalidation
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Practical AWS experience, including ECS/Fargate, Docker, CloudWatch, IAM and CI/CD
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Strong integration and regression testing experience
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Experience with multi-tenant SaaS security and access controls
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