Java • pasadena ca
Mercor is partnering with a **frontier AI research lab** to engage experienced software engineers with deep expertise in **legacy codebase migration and modernisation**.We are looking for engineers... Show more
Full-stack technical expertise with primary proficiency in Python (development & coding) and secondary experience in Java, along with hands-on involvement in application architecture design and dev... Show more
Full Stack Engineer</u></b></p> <p><b>Location:</b> Irvine, CA or Los Angeles, CA Onsite 3 days/week<br /> <b>Alternative Locations:</b> NY... Show more
Mercor is partnering with a **frontier AI research lab** to engage experienced software engineers with deep expertise in **legacy codebase migration and modernisation**.We are looking for engineers... Show more
Job Title: Full Stack Engineer.Location: Onsite at either Irvine, CA or Los Angeles, CA 3 days a week - also can be NYC, Atlanta, Boston or Chicago (if not in LA/Irvine, note candidate must work on... Show more
Head Of Application Development.We're hiring a Head of Application Development for a private technology office in Los Angeles led by one of the most influential figures in modern tech.We are seekin... Show more
Java Architect Job Duties: Achieves e-commerce information architecture operational obj... Show more
Oracle is one of the leading ERP technologies that is revolutionizing how tax is managed and how tax departments around the globe operate.If you are someone who thrives in navigating the growing ta... Show more
Job Title: Senior Software Engineer</b></div> <div><b>Location: Los Angeles, CA (Remote)</b></div> <div><b>Job Type: Contract W2</b></div>... Show more
Contribute production-quality code, reviews, and documentation to open-source repositories relevant to the customer's project.Design, implement, and optimize complex algorithms and system component... Show more
Primary Skills: Java (Expert), AWS (Advanced), RESTful (Advanced), GraphQL (Intermediate), SQL/NoSQL (Intermediate).Location: Remote to Any Disney Hubs.Become a critical part of our Identity Platfo... Show more
Newport Beach, CA (Onsite – 5 days per week).A Newport Beach–based consulting and software firm is seeking an experienced Full-Stack Java Engineer to join their team on a Full-Time basis.The organi... Show more
Johnson Service Group is seeking a.This role will support Financials, Project & Grants Accounting, Inventory, and Procurement while partnering with business users on requirements, enhancem... Show more
Los Angeles, California, United States Or refer someone Job Openings.Position Summary: We are seeking a highly skilled and motivated B2B Wholesale Vendor Director fluent in both Korean and English.... Show more
West Hollywood / Los Angeles, CA.Applicants must be legally authorized to work in the United States.Visa sponsorship is not available for this role.Our client is a highly respected, innovation-driv... Show more
CGS is looking for an IT Project Manager to assist with the design, development, and oversight of various ongoing efforts in the IT department of a large federal entity.The PM will participate in p... Show more
Project Management to Construction Management) is a professional services company dedicated to providing Program and Project Management, Construction Management, and Project Controls services durin... Show more
Data Engineer, you will play a pivotal role in the transformation of data into actionable insights.Collaborate with our dynamic team of technologists to develop cutting-edge data solutions that dri... Show more
Mercor is partnering with a **frontier AI research lab** to engage experienced software engineers with deep expertise in **legacy codebase migration and modernisation**.We are looking for engineers... Show more
Director Of Engineering, Android.Location: San Francisco, Los Angeles, CA or Dallas, TX.As the Director of Engineering for Android Platforms, you will join an existing team that builds mobile, tabl... Show more
Mercor is partnering with a **frontier AI research lab** to engage experienced software engineers with deep expertise in **legacy codebase migration and modernisation**. We are looking for engineers who have personally executed complex migrations across **large, production-grade systems**, particularly in **financial services, fintech/payments, insurance, healthcare, telecom, large technology companies, and other mission-critical enterprises**. Strong hands-on experience with production migrations is the primary qualification. ## What You'll Do - 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**. ## Relevant Migration Experience Candidates should have deep expertise in **one or more** of the following: - **Language/version:** Java 8 → 17/21, legacy .NET → modern .NET, Python 2 → 3, PHP 7 → 8 - **Language rewrites:** COBOL → Java/Python, JavaScript → TypeScript - **Frameworks:** Angular, Rails, Django, Spring/Spring Boot, , Next.js/Astro, and other major framework upgrades/replacements - **Databases & ORMs:** Oracle/MySQL → PostgreSQL, SQL → NoSQL, Hibernate → jOOQ, Sequelize → Prisma, raw SQL → ORM - **Infrastructure:** VMs/bare metal → containers, Docker/Kubernetes, cloud-native architectures - **CI/CD:** Jenkins/Travis → GitHub Actions, GitLab CI, or modern deployment pipelines - **Build/package tooling:** Maven → Gradle, Webpack → Vite, CRA → Next.js, npm → pnpm - **APIs:** REST → GraphQL, HTTP/REST → gRPC, SOAP/legacy APIs → modern interfaces - **Authentication:** Legacy auth → OAuth/OIDC, SAML/SSO, modern identity and authorisation systems - **Repositories:** Polyrepo → monorepo using Bazel, Nx, Turborepo, or similar - **Testing:** Migration of unit, integration, browser, and E2E testing frameworks - **Dependencies/SDKs:** Replacement of deprecated or EOL libraries, APIs, runtimes, and vendor SDKs ## Ideal Background - **5+ years of professional software engineering experience**, ideally Senior, Staff, Principal, or equivalent. - 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. - **Especially valuable:** engineers who have modernised **core banking, payments, trading, insurance, healthcare, telecom, or other high-reliability systems**. - For **COBOL/mainframe modernisation, experience with technologies such as z/OS, CICS, JCL, DB2, VSAM, batch processing, and COBOL-to-Java/Python migrations** is particularly valuable. ## Why Join - Apply your migration expertise to help shape how **frontier AI models understand and execute complex software modernisation**. - Work on technically challenging problems modelled after **real-world, production-scale legacy systems**. - Contribute expertise developed from large enterprise migrations without needing an open-source maintainer background. - Opportunity for **ongoing work** as the research program expands.
