If you have personally led large production migrations, this role pays for that experience. You design, build and review complex codebase migration tasks modeled on real enterprise systems, and judge migration solutions for correctness and production readiness.
What you will do
- Design, implement, review and evaluate complex migration and modernization tasks.
- Analyze legacy code, dependencies, APIs, databases, build systems and infrastructure to find safe migration paths.
- Keep functionality, backwards compatibility, data integrity, security and performance intact through a migration.
- Write tests and validation strategies that catch regressions and behavior changes.
- Judge generated migration solutions for correctness, completeness, maintainability and production readiness.
What you need
- 5+ years of professional software engineering, ideally at Senior, Staff, Principal or equal level.
- Ownership of, or major technical work on, large production migrations.
- Deep experience in one or more migration types: language versions (for example Java, .NET, Python, PHP), rewrites such as COBOL to Java or Python, framework upgrades, database and ORM moves, containers and cloud-native infrastructure, CI/CD, build tooling, APIs, authentication, monorepos, test frameworks, or replacing deprecated dependencies.
- Strong knowledge of compatibility, testing, observability, staged rollouts, rollback and behavioral equivalence.
- The ability to reason about unfamiliar codebases and find subtle migration failures.
Especially valued: modernization of banking, payments, trading, insurance, healthcare or telecom systems, and for mainframe work, experience with z/OS, CICS, JCL, DB2, VSAM and batch processing. An open-source maintainer background is not needed.
How pay works
The listing gives an hourly rate of $200/hr. It mentions a chance of ongoing work as the program grows.
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