Java software developer • rancho cucamonga 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
Business Development Sales Manager – New Construction SolarLocation: Southern CaliforniaEmployment Type: Full-TimeAbout the RoleWe are looking for a Business Development Sales Manager to grow our n... Show more
We have partnered with a large Leasing Non-residential Real Estate company in the Chino, CA area to provide them with a Commercial Real Estate Property Accountant.Please review the below descriptio... Show more
Special Hazards Fire Suppression Designer .In this role, you will design and create the finished representation for special hazard suppression systems using drawing and drafting skills and tools.Dr... Show more
Location: Rancho cucamonga, CA.We are seeking a talented UI Developer to join our team.The UI Developer will be responsible for designing and implementing user interfaces for web and mobile applica... Show more
Business Development Sales Manager New Construction Solar.Location: Southern California Employment Type: Full-Time.We are looking for a Business Development Sales Manager to grow our new construct... Show more
Cut+Dry is a fast-growing FoodTech startup searching for flexible go-getters who welcome the challenge of meeting the needs of a rapidly expanding business.Our company is revolutionizing the $300B ... Show more
At Hot Topic, we're passionate about a few things: music, pop culture, and creating the most amazing in-store experience for our customers and employees.We're on the search for a Full-Time Assistan... Show more
Location: Ontario, CA, US, 91761 Employment Type: Hourly Work Arrangement: Onsite.Position Summary: The Plant Training Specialist is responsible for the design, development, and execution of a wide... Show more
Company: Inland Pacific Roofing.Pay: $60,000–$85,000 per year, depending on experience.Inland Pacific Roofing is looking for an experienced, organized, and hands-on Construction Safety & System... Show more
We specialize in the design, manufacturing, and installation of high-precision industrial racking systems, automated storage robots, and cloud-based software solutions.We provide intelligent storag... Show more
Trenchless Services Senior Construction Consultant.HDR is looking for a Senior Construction Consultant to join our national Trenchless Services team.This role will report to the Trenchless Services... Show more
Commercial Drywall/Metal Framing Project Manager Or Estimator.I am working with multiple well-respected, firmly established Commercial Drywall/Metal Framing Contractors seeking experienced Project ... Show more
The Best Teams are Created and Maintained Here.The Maintenance Installation Business Developer is responsible for driving new business growth by identifying, pursuing, and securing contracts for sm... Show more
The Plant Training Specialist is responsible for the design, development, and execution of a wide variety of Learning & Development processes, programs, systems, and performance support materia... Show more
The Network Relations role supports the frontline of Network Development, responsible for providing excellent customer service while impacting and overseeing provider data integrity.This role must ... Show more
We are seeking a detail-oriented, driven Entry-Level Staff Accountant to join our growing finance team.Reporting directly to the Accounting Manager (or Controller), you will assist in day-to-day ac... Show more
The Information Technology Director will have an integral role providing user support, customer service, and implementation of IT platforms companywide while leading and collaborating with their di... 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.
