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Senior Java Software Engineer Jobs in Rancho Cucamonga, CA

CoStar Group

LoopNet - Senior Software Engineer

Orange, CA · On-site

$130K - $172K/yr

LoopNet - Senior Software Engineer CoStar Group (NASDAQ:CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S ...

Collabera

Cloud Software Engineer II

Ontario, CA

$61 - $79.25/hr

We are seeking an experienced high-performing software engineer for a contract position in our core ... Mastery of C; exposure to other languages (Python, XML, Java, scripting) is an asset. Proficiency ...

RTX

Software Engineer I (Onsite)

Fullerton, CA · On-site

Experience with C++, C, Java or similar higher level programming language. * Knowledge of data structures and algorithms, systems software design, operating systems, architectures, software ...

RTX

Software Engineer I (Onsite)

Fullerton, CA

Experience with C++, C, Java or similar higher level programming language. * Knowledge of data structures and algorithms, systems software design, operating systems, architectures, software ...

cFive Solutions, Inc

Senior Applications Developer

Anaheim, CA · On-site

$100K - $138K/yr

Scope of Work This role is a Senior level Software Engineer/Developer that is well rounded with the ... Design, develop and test web applications developed using Angular and Java. * Develop and code ...

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Senior Java Software Engineer information

See Rancho Cucamonga, CA salary details

$41.4K

$154.2K

$270.8K

How much do senior java software engineer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for senior java software engineer in Rancho Cucamonga, CA is $154,236.00, according to ZipRecruiter salary data. Most workers in this role earn between $127,700.00 and $168,100.00 per year, depending on experience, location, and employer.

What are some common challenges faced by senior Java software engineers when leading development projects?

Senior Java Software Engineers often encounter challenges such as balancing hands-on coding with leading and mentoring team members, managing tight project deadlines, and ensuring code quality across the team. They are also responsible for making key architectural decisions and integrating new technologies while maintaining system stability. Effective communication and collaboration with cross-functional teams, including QA, DevOps, and product managers, are essential to successfully deliver robust solutions.

What does a senior Java software engineer do?

A Senior Java Software Engineer is responsible for designing, developing, and maintaining complex software applications using the Java programming language. They often lead technical projects, mentor junior developers, and collaborate with cross-functional teams to deliver high-quality software solutions. Their role includes analyzing user requirements, troubleshooting issues, optimizing code for performance, and ensuring best practices in software development. Senior Java engineers are also involved in code reviews and may contribute to architectural decisions within their organization.

What are the key skills and qualifications needed to thrive as a senior Java software engineer?

To thrive as a Senior Java Software Engineer, you need advanced proficiency in Java programming, software design principles, and a solid understanding of computer science fundamentals, often backed by a degree in computer science or a related field. Experience with frameworks like Spring, build tools such as Maven or Gradle, and version control systems like Git is typically required, along with knowledge of cloud platforms or containerization tools. Strong problem-solving abilities, effective communication, and leadership skills help you mentor team members and collaborate on complex projects. These competencies are crucial for delivering robust, scalable software solutions and leading development teams in dynamic environments.
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Senior Java Software Engineer jobs near you
Infographic showing various Senior Java Software Engineer job openings in Rancho Cucamonga, CA as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $154,236 per year, or $74.2 per hour.

LoopNet - Senior Software Engineer

CoStar Group

Orange, CA • On-site

$130K - $172K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 11 days ago

Job description

LoopNet - Senior Software Engineer
Job Description
CoStar Group (NASDAQ:CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.
We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We've continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.
LoopNet, the most popular place to find a space, is the #1 global commercial real estate marketplace. With more than 12 million global unique monthly visitors, LoopNet provides brokers, buyers and sellers with what they need to meet and make deals. LoopNet has established itself as the most effective and far-reaching digital marketplace for commercial real estate owners and brokers. We are not done yet! We continue to focus on driving expansion by increasing market share in the US and abroad, continuously innovating and enhancing the product and growing a powerhouse global team to reach our goals. Learn more about LoopNet.
We are seeking a highly skilled Senior Software Engineer with deep expertise in C#/.NET, AWS cloud development, and hands-on experience with AI coding tools such as Claude Code or GitHub Copilot. In this role, you will contribute to building scalable, high-quality systems across multiple products and brands-including LoopNet.com-while leveraging modern AI-driven development practices to accelerate delivery and improve code quality. You will also play a key role in architecture decisions and mentoring engineers across the team.
This position is located in Irvine, CA and offers 4 days a week onsite with 1 day work from home.
BASIC QUALIFICATIONS:
  • Bachelor's degree from an accredited, not-for-profit university or college.
  • A demonstrated track record of commitment with prior employers.
  • 7+ years of production development experience with C# and .NET or .NET Core.
  • Proven history of building and launching successful products and platforms.
  • Experience delivering products that meet specifications and performance SLAs.
  • Solid experience writing unit, performance, and automated end-to-end tests
  • Strong experience building APIs and backend systems with a solid grasp of software design principles.
  • Deep understanding of the business context for which you are building software.
  • Active participation in mentoring developers and building team consensus.

PREFERRED QUALIFICATIONS:
  • Working knowledge of Vue.js or React in TypeScript.
  • Experience with relational database design (MS SQL or MySQL), including performance tuning.
  • Hands-on experience with AWS services including S3, SQS, DynamoDB, and ElastiCache, as well as Apache Kafka and Datadog.
  • Experience with microservices, distributed systems, Docker, and Kubernetes.
  • Familiarity with CI/CD pipelines, DevOps practices, and Infrastructure as Code tools.
  • Application security knowledge and experience with Git-based workflows.
  • Hands-on professional experience with AI coding tools such as Claude Code, GitHub Copilot, or equivalent.
  • Experience with cloud data warehouse platforms (BigQuery, Databricks, or Snowflake) and proficiency in Python for data engineering or analytics workflows.

What's in it for You:
When you join CoStar Group, you'll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.
We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement.
Our benefits package includes (but is not limited to):
  • Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
  • Life, legal, and supplementary insurance
  • Virtual and in person mental health counseling services for individuals and family
  • Commuter and parking benefits
  • 401(K) retirement plan with matching contributions
  • Employee stock purchase plan
  • Paid time off
  • Tuition reimbursement
  • On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes
  • Access to CoStar Group's Employee Resource Groups
  • Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

The final salary or hourly rate offered for this role will fall within the range set forth below based on a variety of factors, including but not limited to, geographic location, skills, and competencies.
Base Compensation: $124,000-$187,000 Annually
We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. However, please note that CoStar Group is not able to provide visa sponsorship for this position.
#LoopNet
#LI-PM3
CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing

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