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Senior Software Engineer Jobs in Rialto, CA (NOW HIRING)

CoStar Group

LoopNet - Senior Software Engineer

Orange, CA · On-site

$130K - $172K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

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 ...

CoStar Group

LoopNet - Senior Software Engineer

Orange, CA · On-site

$130K - $172K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

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 ...

Medium

Senior Software Engineer (IoT)

Ontario, CA · On-site

$140 - $205/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

The Role Swiftly is looking for a Senior Software Engineer to join a cross‑functional product team enabling our transit agency customers to operate and manage on‑vehicle hardware systems and ...

CoStar Group

LoopNet - Senior Software Engineer (C#/.NET)

Orange, CA · On-site

$130K - $172K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

LoopNet - Senior Software Engineer (C#/.NET) CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces.

Medium

Senior Software Engineer (Full-stack)

Ontario, CA · On-site

$130 - $210/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

The Role Swiftly is looking for a Senior Software Engineer with experience building scalable cloud‑based services. You'll collaborate seamlessly with Product Managers, Designers and teammates to ...

Esri

Sr. Software Development Engineer - Scala

Redlands, CA · On-site

$123K - $162K/yr

Esri is a leading company in geospatial technology, and they are seeking a Senior Software Development Engineer specializing in Scala. The role involves designing and developing innovative software ...

Econolite Group, Inc.

Senior Software Engineer in Test

Anaheim, CA · On-site

$100K - $140K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The Senior Software Engineer in Test (SSET) will contribute to the overall effectiveness of Econolite's test automation systems and infrastructure, supporting our market-leading traffic controller ...

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All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Rialto, CA

Senior Software Engineer information

See Rialto, CA salary details

$75.7K

$143.7K

$192.5K

How much do senior software engineer jobs pay per year?

As of Aug 16, 2026, the average yearly pay for senior software engineer in Rialto, CA is $143,689.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,800.00 and $161,900.00 per year, depending on experience, location, and employer.

What is a senior software engineer?

A senior software engineer designs, codes, tests, and maintains computer software. While these are your primary responsibilities as a senior software engineer, you may also have supervisory duties. These include overseeing a team of junior software engineers or developers. The senior software engineer title is sometimes used interchangeably with senior developer, and positions for both may share similar job duties and responsibilities. In general, software engineers are distinguished from developers in that software engineers apply engineering principles to software development.

What are some common challenges senior software engineers face when mentoring junior team members?

Senior Software Engineers often mentor junior colleagues, which can be incredibly rewarding but also presents challenges. Balancing mentorship with project deadlines can be demanding, as it requires strong time management and communication skills. Additionally, adapting explanations to different learning styles and levels of experience can be tricky. However, effective mentorship helps build a stronger team and can lead to enhanced leadership opportunities for the senior engineer.

What is the difference between Senior Software Engineer vs Software Developer?

AspectSenior Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; entry to mid-level experience
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing features, debugging
Industry UsageUsed across tech companies, startups, enterpriseCommon in software firms, startups, freelance work
Search & ComparisonOften compared for experience level, responsibilitiesCompared for entry-level to mid-level roles

The main difference between a Senior Software Engineer and a Software Developer lies in experience, responsibilities, and scope. Senior Software Engineers typically have more experience, lead projects, and mentor others, while Software Developers focus on coding and feature development. Both roles are essential in tech companies, but the Senior Software Engineer position involves higher-level planning and leadership.

What are the key skills and qualifications needed to thrive as a senior software engineer, and why are they important?

To thrive as a Senior Software Engineer, you need advanced programming skills, deep understanding of software architecture, and several years of experience in software development, often supported by a relevant degree. Familiarity with tools like Git, CI/CD pipelines, cloud platforms, and expertise in technologies such as Java, Python, or JavaScript are typically required. Leadership, problem-solving, and effective communication are crucial soft skills for mentoring teams and collaborating across departments. These skills ensure the delivery of robust, scalable solutions and drive successful project outcomes in complex technical environments.
More about Senior Software Engineer jobs

What are the most commonly searched types of Software Engineer jobs in Rialto, CA?

The most popular types of Software Engineer jobs in Rialto, CA are:

What are popular job titles related to Senior Software Engineer jobs in Rialto, CA?

For Senior Software Engineer jobs in Rialto, CA, the most frequently searched job titles are:

What job categories do people searching Senior Software Engineer jobs in Rialto, CA look for?

The top searched job categories for Senior Software Engineer jobs in Rialto, CA are:

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Cities near Rialto, CA with the most Senior Software Engineer job openings:

Senior Software Engineer jobs near you
Infographic showing various Senior Software Engineer job openings in Rialto, CA as of August 2026, with employment types broken down into 1% Internship, 85% Full Time, 11% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $143,689 per year, or $69.1 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 21 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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