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Full Stack Java Developer Engineer Jobs in Ontario, CA

Emergence AI

Software Engineer - Full Stack

Irvine, CA

$120K - $140K/yr

We're seeking a "Software Engineer - Full Stack" to build robust, tested, and scalable systems ... Strong programming fundamentals in Python or similar languages (Java, TypeScript, Go) * Experience ...

Emergence

Software Engineer - Full Stack

Irvine, CA · On-site

$120K - $140K/yr

We're seeking a "Software Engineer - Full Stack" to build robust, tested, and scalable systems ... Strong programming fundamentals in Python or similar languages (Java, TypeScript, Go) * Experience ...

Emergence AI

Software Engineer - Full Stack

Irvine, CA · On-site

$120K - $140K/yr

We're seeking a "Software Engineer - Full Stack" to build robust, tested, and scalable systems ... Strong programming fundamentals in Python or similar languages (Java, TypeScript, Go) * Experience ...

Jobsbridge

Sr. UI/UX Developer

Irvine, CA

$53.75 - $69.75/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Basic Minimum Qualifications: 5+ years' experience with UI /UX design ...

Jobsbridge

Sr. UI/UX Developer

Irvine, CA · On-site

$64.50 - $83.50/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. 5+ years' experience with UI /UX design, development, implementation ...

Easy Street Capital

Full Stack Developer

Irvine, CA · On-site

$90K - $110K/yr

We are looking for a skilled and motivated Full Stack Developer to join our growing team, building innovative solutions in a fast-paced, collaborative environment. This is a great opportunity for ...

Viant Technology

Sr. Full Stack Engineer

Irvine, CA · On-site

They are seeking a Senior Full Stack Engineer to lead the development of complex, data-driven user ... Java or Go • Familiarity with cloud environments (AWS, GCP) and distributed systems • ...

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Full Stack Java Developer Engineer information

See Ontario, CA salary details

$11

$59

$79

How much do full stack java developer engineer jobs pay per hour?

As of May 31, 2026, the average hourly pay for full stack java developer engineer in Ontario, CA is $59.09, according to ZipRecruiter salary data. Most workers in this role earn between $51.35 and $66.30 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Full Stack Java Developer Engineer, and why are they important?

To thrive as a Full Stack Java Developer Engineer, you need strong proficiency in Java, front-end and back-end development, database management, and a relevant degree in computer science or related fields. Familiarity with frameworks like Spring Boot, Angular or React, RESTful APIs, and tools such as Git and Docker is typically required, along with certifications like Oracle Certified Java Programmer being advantageous. Problem-solving abilities, teamwork, adaptability, and effective communication are standout soft skills for this role. These skills and qualities are crucial for delivering robust, scalable applications and collaborating effectively across diverse development teams.

How do Full Stack Java Developer Engineers typically balance backend and frontend responsibilities within a project team?

Full Stack Java Developer Engineers are often expected to fluidly switch between backend tasks, such as designing RESTful APIs with Java or Spring Boot, and frontend work, like implementing user interfaces with frameworks such as Angular or React. Balancing these responsibilities usually involves close collaboration with UI/UX designers, backend specialists, and QA testers through agile sprints or similar methodologies. Effective communication and prioritization skills are essential, as developers may need to rapidly shift focus based on project deadlines or client feedback. Over time, this cross-functional role can provide valuable experience in both domains, opening up diverse career advancement opportunities.

What is a Full Stack Java Developer Engineer?

A Full Stack Java Developer Engineer is a software professional skilled in both front-end and back-end development using Java technologies. They are responsible for designing, building, and maintaining complete web applications, handling everything from the user interface to the server-side logic and database integration. These engineers work with frameworks such as Spring Boot for the backend and technologies like HTML, CSS, and JavaScript for the frontend. Their expertise allows them to manage the full software development lifecycle, ensuring seamless communication between client and server components.

What is the difference between Full Stack Java Developer Engineer vs Java Software Engineer?

AspectFull Stack Java Developer EngineerJava Software Engineer
Required CredentialsBachelor's in CS or related, Java certifications often preferredBachelor's in CS or related, Java certifications often preferred
Work EnvironmentDevelops both front-end and back-end applications, often in agile teamsFocuses on back-end development, APIs, and server-side logic
Employer & Industry UsageTech companies, startups, enterprises needing full-stack solutionsSoftware firms, financial institutions, enterprise IT teams

Full Stack Java Developer Engineers handle both front-end and back-end development, providing complete solutions, while Java Software Engineers typically focus on server-side and back-end tasks. Both roles require Java expertise and often overlap in skills, but their scope and daily tasks differ based on project needs.

What are popular job titles related to Full Stack Java Developer Engineer jobs in Ontario, CA? For Full Stack Java Developer Engineer jobs in Ontario, CA, the most frequently searched job titles are:
What job categories do people searching Full Stack Java Developer Engineer jobs in Ontario, CA look for? The top searched job categories for Full Stack Java Developer Engineer jobs in Ontario, CA are:
What cities near Ontario, CA are hiring for Full Stack Java Developer Engineer jobs? Cities near Ontario, CA with the most Full Stack Java Developer Engineer job openings:
Full Stack Java Developer Engineer jobs near you
AI Native Full Stack Engineer - Technical Lead

AI Native Full Stack Engineer - Technical Lead

Prosum Inc.

Irvine, CA • On-site

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

Job Description
AI-Native Full Stack Engineer - Technical LeadSalary Range: $170k to $180k
Job Summary
We are seeking an AI-Native Full Stack Engineer / Technical Lead to drive the design, development, and delivery of modern, AI-powered software systems. This role is highly hands-on and combines full-stack engineering, technical leadership, and AI-native development practices.
The ideal candidate will actively write production code, define system architecture, and lead adoption of agentic development workflows across the engineering team. This position requires experience building and deploying LLM-powered applications, along with a strong foundation in distributed systems and cloud-native development.
Key Responsibilities
  • Design, build, and deploy full-stack applications using modern development frameworks and AI-assisted workflows
  • Lead development of LLM-powered features, including prompting, tool/function calling, and streaming outputs
  • Architect systems that incorporate agent-based workflows, including planning loops, tool usage, and memory management
  • Develop and maintain RAG pipelines, embeddings, and vector database integrations
  • Ensure high standards for code quality, testing, observability, security, and performance
  • Drive adoption of AI-native engineering practices and improve team productivity through automation and tooling
  • Collaborate with cross-functional teams to define technical requirements and deliver scalable solutions
  • Mentor engineers through code reviews, pair programming, and technical guidance
  • Lead incident response and contribute to continuous improvement through postmortems
  • Optimize systems for latency, cost efficiency, and reliability
Required QualificationsAI / Machine Learning Experience
  • Hands-on experience building and deploying LLM-based applications in production environments
  • Experience with prompt engineering, structured outputs, and tool/function calling
  • Strong understanding of Retrieval-Augmented Generation (RAG), embeddings, and vector databases
  • Experience designing agentic systems (multi-step execution, planning loops, tool orchestration)
  • Familiarity with LLM evaluation techniques, including offline evaluation, datasets, and guardrails
  • Knowledge of AI risks such as hallucination, prompt injection, and cost control strategies
Software Engineering
  • 7+ years of professional software engineering experience (or equivalent hands-on expertise)
  • 2+ years of experience in a technical lead or senior engineering role
  • Strong proficiency in at least one backend language: C#, .NET, Java, Python, Go, Kotlin, or Node.js
  • Experience with RESTful APIs and/or gRPC services
  • Frontend development experience using React, Angular, Vue, or Next.js with TypeScript
  • Strong database experience with SQL (PostgreSQL, SQL Server, MySQL) and NoSQL systems (e.g., Redis, MongoDB)
  • Experience building cloud-native applications on Azure, AWS, or GCP
  • Familiarity with containers, orchestration, and Infrastructure as Code (Terraform, Bicep, Pulumi)
  • Experience with CI/CD pipelines (GitHub Actions, Azure DevOps)
  • Strong understanding of distributed systems, concurrency, and system design principles
Leadership & Soft Skills
  • Demonstrated ability to lead through technical contribution and influence
  • Strong communication skills with both technical and non-technical stakeholders
  • Ability to drive change and improve engineering practices across teams
  • Experience mentoring and developing engineers
Preferred Qualifications
  • Experience with multi-agent frameworks (e.g., LangGraph, Semantic Kernel, AutoGen)
  • Knowledge of event-driven architectures (Kafka, Event Hubs, NATS)
  • Experience with model fine-tuning, distillation, or self-hosted inference
  • Background in B2B SaaS, procurement, supply chain, or construction technology
  • Contributions to open-source projects, technical blogs, or conference speaking engagements

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