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Junior java developer Jobs in Springfield, MA

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Junior java developer • springfield ma

Last updated: 1 day ago

Remote Legacy Codebase Migration Expert - AI Trainer ($200-$200 per hour)

MercorWestfield, Massachusetts, US
Remote
Part-time

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

Energy Project Developer

Trane TechnologiesSpringfield, MA, United States
$112,986.66–$181,200.00 yearly
Full-time

Senior Project Developer, Energy Services, North America CHVAC.Be a part of our mission! As a world leader in creating comfortable, sustainable, and efficient climate solutions for buildings, homes... Show more

Junior HR People Partner - OP02223

Dev.ProAgawam, MA, United States
Full-time

Pro is a global team of IT professionals helping tech companies scale their business through software engineering expertise.Operating as a remote-first company, our developers work across 55+ count... Show more

Junior Commercial Driver's License Truck Driver

10-4 Logistics USASpringfield, MA, US
Full-time
Quick Apply

If you have earned your Class A CDL and are seeking paid, mentored experience to launch a professional driving career, this opportunity based in Springfield, MA may be suitable.The role provides a ... Show more

Remote Software Developer $60 - $120/hourpay

Micro1Chicopee, Massachusetts, US
$60.00 hourly
Remote
Full-time

AI data lab for training frontier models and evaluating AI agents.Experts contribute their diverse subject matter knowledge across domains such as finance, healthcare, STEM engineering, and more.AI... Show more

Remote Research Physics Expert - AI Trainer ($80-$135 per hour)

MercorSpringfield, Massachusetts, US
$80.00 hourly
Remote
Full-time

Role Overview We are seeking expert physics researchers to author and verify golden reference solutions for the **CritPt benchmark (arXiv:2509.Participants will solve CritPt research-level problems... Show more

AI Platform Delivery Director

Massachusetts Mutual Life InsuranceSpringfield, MA, United States
$148,300.00–$194,600.00 yearly
Full-time

MassMutual's AI Platform Engineering Team Opportunity.MassMutual's AI Platform Engineering team is seeking an impact-driven Engineering professional to lead and grow the team that builds the infras... Show more

Shift Manager

Wendy'sWestfield, MA, United States
Full-time

You're an experienced restaurant manager looking for an organization that will invest in your development and give you opportunities for advancement.You enjoy a challenge and are always pushing for... Show more

Remote Sales Engineering Expert - AI Trainer ($100-$150 per hour)

MercorChicopee, Massachusetts, US
Remote
Full-time

Role Overview** Mercor is partnering with a leading AI research organization to engage experienced sales engineers for a project focused on evaluating how well AI systems perform real-world technic... Show more

Senior Geotechnical Engineer

Trilon GroupSpringfield, MA, US
Full-time +1
Quick Apply

A desire to effect positive change.That’s what it takes to work at Fuss & O’Neill – because that’s what we do for the communities in which we work: we create, innovate, and design long-lasting impr... Show more

Junior Biostatistician

MaximusSpringfield, US
$59,100.00 yearly
Full-time

Essential Duties and Responsibilities: - Develop and deploy advanced methods to analyze operational data and derive meaningful, actionable insights for stakeholders and business development ... Show more

Junior Buyer

Sound Seal, Inc.Agawam, MA, United States
Full-time

The Junior Buyer is responsible for assisting in the procurement of goods and services to meet the company's operational needs.This role involves supporting the purchasing team, maintaining accurat... Show more

Senior GEOINT Data Scientist

MANTECHSpringfield, Massachusetts, US
Full-time

The Senior GEOINT Data Scientist will leverage their strong technical background and knowledge to support critical data environments, to include creating streamlined processes, evaluating unique da... Show more

Junior Software Developer - AI-focused

FIT StaffingWestfield, Massachusetts
Permanent

Junior Software Developer – AI-focused.Our client is building out an AI-focused technology team and is looking to add a junior software developer to their group in Westfield, MA.This is a strong op... Show more

Junior Assistant Manager

Rainbow ShopsSpringfield, MA, United States
Full-time

Rainbow USA is recognized as one of the fastest growing junior, kids, plus, and petite, specialty apparel retail chains and has grown to over 1,000 retail stores! We have multiple retail lines that... Show more

Travel Nurse RN - Medical-Surgical - $2,441 per week in Boston, MA

TravelNurseSourceSpringfield, Massachusetts, US
Full-time

Registered Nurse (RN) | Medical-Surgical.The Registered Nurse (RN) in the Med-Surg unit is responsible for providing direct patient care in a fast-paced environment, assisting with the recovery of ... Show more

Sr. Calculation Developer / Architect - Insurance

CYNET SYSTEMSSpringfield, MA, US
Full-time

Job Overview: Pay Range: $95hr - $100hr Requirement/Must Have: 10+ years of enterprise software engineering, architecture, or legacy-system modernization experience.Experience with product calculat... Show more

 • Promoted

Remote Research Physics Expert - AI Trainer ($80-$135 per hour)

MercorWestfield, Massachusetts, US
$80.00 hourly
Remote
Full-time

Role Overview We are seeking expert physics researchers to author and verify golden reference solutions for the **CritPt benchmark (arXiv:2509.Participants will solve CritPt research-level problems... Show more

Remote Cybersecurity Research Expert – Offensive Security & Vulnerability Research - AI Trainer

MercorSpringfield, Massachusetts, US
Remote
Part-time

We're looking for highly accomplished **Cybersecurity Research Experts** to help evaluate cutting-edge AI systems in advanced security reasoning, vulnerability analysis, exploit development, and se... Show more

CNC Swiss Set Up Operator Senior

TTEAgawam, MA, US
Full-time

We’re looking for an experienced CNC Swiss Set-Up Operator III to join our team! This role is ideal for someone with strong hands-on expertise in Swiss-style CNC turning who enjoys problem-solving,... Show more

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Remote Legacy Codebase Migration Expert - AI Trainer ($200-$200 per hour)

Remote Legacy Codebase Migration Expert - AI Trainer ($200-$200 per hour)

MercorWestfield, Massachusetts, US
1 day ago
Job type
  • Part-time
  • Remote
Job description
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.