Senior Software Engineer | Remote

What You'll Be Doing

• Design, implement, review, and evaluate complex codebase migration and modernisation tasks.
• Analyse legacy code, dependencies, APIs, databases, build systems, and infrastructure to determine safe migration approaches.
• Preserve functionality, backwards compatibility, data integrity, security, and performance during migrations.
• Develop tests and validation strategies to identify migration regressions and behavioural differences.
• Evaluate AI-generated migration solutions for correctness, completeness, maintainability, and production readiness.

What We're Looking For

• Have strong relevant experience in the domain.
• Personally owned or made substantial technical contributions to large-scale production migrations.
• Experience working with mature systems involving technical debt, complex dependencies, legacy integrations, and significant regression risk.
• Strong knowledge of compatibility, testing, observability, staged rollouts, rollback strategies, and behavioural equivalence.
• Ability to reason deeply about unfamiliar codebases and diagnose subtle migration failures.

Work Snapshot: Type: Contract | Location: Remote | Commitment: 10-40 hrs/week