Senior Software Engineer at Costar in Richmond, VA | Kablio

Role

Description

ui components

react development

component library

testing

mentoring

tech evaluation

Build reusable, scalable, and secure UI components and libraries with a focus on maintainability and performance.
Take an active role in mentoring other developers.
Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.
Collaborate with cross-functional teams including designers, backend developers, and product managers to transform business needs into technical solutions.
Develop and maintain engaging, responsive, and high-performance web applications using React, TypeScript, and Tailwind CSS.
Participate actively in code reviews, pair programming, and agile ceremonies.
Contribute to and maintain shared component libraries and front-end architecture.
Write comprehensive unit and integration tests using tools like Jest, React Testing library.

Requirements

bachelor's

react

typescript

ci/cd

aws

git

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.

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.

A track record of commitment to previous employers.
Bachelor’s Degree required from an accredited, not for profit university or college
Be a subject matter expert in front-end technology stack.
Strong grasp of web standards, accessibility, and security best practices.
5+ years of production development experiencing using modern front-end frameworks.
Nice to have experience with AWS S3, Lambda, SQS, Kafka, Redis.
Hands-on experience with CI/CD pipelines and version control using Git.
Experience with .NET Core and SQL Server with the ability to integrate front-end components into a scalable, secure, and maintainable backend architecture
Experience working in Agile development environments.
Deep understanding of HTML, CSS, JavaScript, and responsive design.
Solid understanding of RESTful APIs and familiarity with front-end build tools (e.g., Webpack, Babel).
Experience with Relational Database Management Systems (SQL Server) and Document Data Systems (Dynamo, Elastic Search) a plus.
Strong proficiency in React.js, TypeScript and Tailwind CSS.
Experience in unit, performance and automation testing.
Experience with any state management libraries like Redux, Context API.
Comfortable working across the stack with Node.js on the server-side
Excellent communication, collaboration, and problem-solving skills.

Benefits

Our Benefits Package Includes (but Is Not Limited To)

This position is located in Richmond, VA and the work schedule will be 4 days onsite with 1 day remote.

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.

Commuter and parking benefits
Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
Tuition reimbursement
Paid time off
Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
Employee stock purchase plan
Virtual and in person mental health counseling services for individuals and family
Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups
Life, legal, and supplementary insurance
401(K) retirement plan with matching contributions
On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

costar group does not provide visa sponsorship for this position.

Security clearance

Information not given or found

Company

Overview

1987

Year Founded

The company was established, marking its entry into the real estate information and analytics industry.

Specializes in providing data, research, and insights for commercial real estate professionals.
Operates the largest online commercial real estate marketplace, offering listings and analytics tools.
Known for its innovative approach to tracking property values, trends, and market dynamics.
Focused on transforming real estate with advanced data and technology solutions to drive smarter decisions.
Regularly produces detailed market reports and insights for professionals across sectors such as office, retail, and multifamily housing.
Boasts a strong presence with offices across North America, Europe, and Asia Pacific.
Acquired several key companies, including LoopNet, Apartments.com, and Ten-X, strengthening its market position.
Known for comprehensive property databases that cover millions of commercial and residential listings globally.
Has a reputation for high-quality research that serves investors, brokers, property managers, and other industry stakeholders.

Culture + Values

40-hour week

Efficient Work Schedule

Aim for a balanced and productive work schedule, emphasizing efficiency and focus.

We are always moving forward – as entrepreneurs and innovators
Constant collaboration, working toward a common goal
Chance to be seen and appreciated, to make your mark
Embraces balance, with a wider CoStar Group culture and camaraderie
Work/life balance with the aim of a 40‑hour week and no weekend working
Monthly recognition and rewards
Training programs including a leadership track
Mentorship & Education: support, upskilling, and collaborative development
Eco‑Friendly Workplaces: promoting energy‑friendly offices and commuting
Social Events and Community Support: philanthropy brought to life
Employee Resource Groups hosting networking, advocacy, volunteering and speaker events

Environment + Sustainability

130,000 MT CO2e

Carbon Emissions Avoided

Provided 30 million virtual property tours, avoiding approximately 130,000 metric tons of CO2e emissions.

75% Reduction

Data Center Efficiency

Reduced physical data center sites by over 75%, significantly improving energy and water efficiency across operations.

50% Renewables

Clean Energy Use

50% of electricity consumed at data centers comes from renewable sources as of 2023.

B− Rating

CDP Evaluation

Achieved a B− rating from CDP, reflecting substantial progress in environmental transparency and sustainability management.

Signed SBTi commitment in May 2023 to set science-based GHG targets toward net-zero by 2050.
Baseline emissions for Scope 1, 2, and relevant Scope 3 were measured and reported in the 2023 ESG Report.
Fleet includes 400+ electric and hybrid research vehicles, reducing fuel consumption by ~160,000 gallons per year.
Recycled over 5 tons of computer equipment in the prior year.
Achieved Scope 1 & 2 reduction targets of 54.6% by 2033 and 90% by 2050; Scope 3 capital goods reduction target of 61.1% per USD by 2033 and 97% by 2050; engagement with 75.3% suppliers by spend through Science-Based Targets by 2029.
Improved ESG ratings with MSCI, Sustainalytics, ISS, and JUST Capital, and completed the first TCFD reporting.

Inclusion & Diversity

Women 45%

Workforce Representation

Women make up 45% of the workforce as of 2023.

Minorities 30%

Leadership Diversity

Underrepresented minorities hold 30% of leadership positions as of 2023.

15% Target

Diversity Hiring Goal

A hiring initiative aims to increase representation by 15% over five years.

99% Retention

Employee Satisfaction

The company maintains a monthly employee retention rate of approximately 99%.

Employee Resource Group membership at ~20% of employees
Over 50% growth in ERG participation since launch (2022)
Diversified supplier network as part of DEI strategy

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Role

Description

ui components

react development

component library

testing

mentoring

tech evaluation

Build reusable, scalable, and secure UI components and libraries with a focus on maintainability and performance.
Take an active role in mentoring other developers.
Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.
Collaborate with cross-functional teams including designers, backend developers, and product managers to transform business needs into technical solutions.
Develop and maintain engaging, responsive, and high-performance web applications using React, TypeScript, and Tailwind CSS.
Participate actively in code reviews, pair programming, and agile ceremonies.
Contribute to and maintain shared component libraries and front-end architecture.
Write comprehensive unit and integration tests using tools like Jest, React Testing library.

Requirements

bachelor's

react

typescript

ci/cd

aws

git

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.

A track record of commitment to previous employers.
Bachelor’s Degree required from an accredited, not for profit university or college
Be a subject matter expert in front-end technology stack.
Strong grasp of web standards, accessibility, and security best practices.
5+ years of production development experiencing using modern front-end frameworks.
Nice to have experience with AWS S3, Lambda, SQS, Kafka, Redis.
Hands-on experience with CI/CD pipelines and version control using Git.
Experience with .NET Core and SQL Server with the ability to integrate front-end components into a scalable, secure, and maintainable backend architecture
Experience working in Agile development environments.
Deep understanding of HTML, CSS, JavaScript, and responsive design.
Solid understanding of RESTful APIs and familiarity with front-end build tools (e.g., Webpack, Babel).
Experience with Relational Database Management Systems (SQL Server) and Document Data Systems (Dynamo, Elastic Search) a plus.
Strong proficiency in React.js, TypeScript and Tailwind CSS.
Experience in unit, performance and automation testing.
Experience with any state management libraries like Redux, Context API.
Comfortable working across the stack with Node.js on the server-side
Excellent communication, collaboration, and problem-solving skills.

Benefits

Our Benefits Package Includes (but Is Not Limited To)

This position is located in Richmond, VA and the work schedule will be 4 days onsite with 1 day remote.

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.

Commuter and parking benefits
Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
Tuition reimbursement
Paid time off
Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
Employee stock purchase plan
Virtual and in person mental health counseling services for individuals and family
Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups
Life, legal, and supplementary insurance
401(K) retirement plan with matching contributions
On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

costar group does not provide visa sponsorship for this position.

Security clearance

Information not given or found

Company

Overview

1987

Year Founded

The company was established, marking its entry into the real estate information and analytics industry.

Specializes in providing data, research, and insights for commercial real estate professionals.
Operates the largest online commercial real estate marketplace, offering listings and analytics tools.
Known for its innovative approach to tracking property values, trends, and market dynamics.
Focused on transforming real estate with advanced data and technology solutions to drive smarter decisions.
Regularly produces detailed market reports and insights for professionals across sectors such as office, retail, and multifamily housing.
Boasts a strong presence with offices across North America, Europe, and Asia Pacific.
Acquired several key companies, including LoopNet, Apartments.com, and Ten-X, strengthening its market position.
Known for comprehensive property databases that cover millions of commercial and residential listings globally.
Has a reputation for high-quality research that serves investors, brokers, property managers, and other industry stakeholders.

Culture + Values

40-hour week

Efficient Work Schedule

Aim for a balanced and productive work schedule, emphasizing efficiency and focus.

We are always moving forward – as entrepreneurs and innovators
Constant collaboration, working toward a common goal
Chance to be seen and appreciated, to make your mark
Embraces balance, with a wider CoStar Group culture and camaraderie
Work/life balance with the aim of a 40‑hour week and no weekend working
Monthly recognition and rewards
Training programs including a leadership track
Mentorship & Education: support, upskilling, and collaborative development
Eco‑Friendly Workplaces: promoting energy‑friendly offices and commuting
Social Events and Community Support: philanthropy brought to life
Employee Resource Groups hosting networking, advocacy, volunteering and speaker events

Environment + Sustainability

130,000 MT CO2e

Carbon Emissions Avoided

Provided 30 million virtual property tours, avoiding approximately 130,000 metric tons of CO2e emissions.

75% Reduction

Data Center Efficiency

Reduced physical data center sites by over 75%, significantly improving energy and water efficiency across operations.

50% Renewables

Clean Energy Use

50% of electricity consumed at data centers comes from renewable sources as of 2023.

B− Rating

CDP Evaluation

Achieved a B− rating from CDP, reflecting substantial progress in environmental transparency and sustainability management.

Signed SBTi commitment in May 2023 to set science-based GHG targets toward net-zero by 2050.
Baseline emissions for Scope 1, 2, and relevant Scope 3 were measured and reported in the 2023 ESG Report.
Fleet includes 400+ electric and hybrid research vehicles, reducing fuel consumption by ~160,000 gallons per year.
Recycled over 5 tons of computer equipment in the prior year.
Achieved Scope 1 & 2 reduction targets of 54.6% by 2033 and 90% by 2050; Scope 3 capital goods reduction target of 61.1% per USD by 2033 and 97% by 2050; engagement with 75.3% suppliers by spend through Science-Based Targets by 2029.
Improved ESG ratings with MSCI, Sustainalytics, ISS, and JUST Capital, and completed the first TCFD reporting.