Lead Software Developer, Costar Group - London at Costar in London, England, United Kingdom | Kablio

Role

Description

devops collaboration

technology evaluation

mentoring

design architecture

api development

data engineering

Act as a key member of the product launch team and work closely to DevOps to resolve operational issues.
Facilitate discussions among developers to exchange ideas and introduce innovative technologies.
Deliver work products that meet specifications, are free of defects, and have optimal performance.
Evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.
Take an active role in mentoring other developers
Hands-on involvement in design, architecture, and development activities in the creation of applications ranging the entirety of the Research Process
Collaborate with your QA resources to ensure that the software you deliver is of the highest quality. (Our customers are not beta testers.)
Work on big, distributed, API-driven systems that operate on massive amounts of data in high transaction volume applications for tens of thousands of users, while producing bullet-proof code that is robust, efficient, and maintainable; our primary tools are C#, .NET Framework, Python, JSON, SQL Server, AWS and Databricks.

Requirements

databricks

.net

sql server

python

aws

bachelor’s

Experience with Databricks and Lakehouse architecture
3+ years of experience with SQL Server, writing SQL queries, data matching/cleansing/enriching as well as ETL/data pipeline engineering.
5+ years of .NET development (C#) development experience including cross-platform communication technologies such as Web API.
Bachelor’s Degree or equivalent experience.
Ability to analyse technical requirements and design new architectures, data models, and ETL strategies.
A demonstrable track record of building and launching successful products that leverage terabytes of data.
A track record of commitment to prior employers.
Experience with .NET Core., Python, Jupyter, Notebook, AWS and NoSQL databases.
Expertise in database design, complex T-SQL programming, performance tuning, and index analysis.
Hands-on experience with cloud-based relational and non-relational databases.

Benefits

Information not given or found

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

Information not given or found

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

devops collaboration

technology evaluation

mentoring

design architecture

api development

data engineering

Act as a key member of the product launch team and work closely to DevOps to resolve operational issues.
Facilitate discussions among developers to exchange ideas and introduce innovative technologies.
Deliver work products that meet specifications, are free of defects, and have optimal performance.
Evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.
Take an active role in mentoring other developers
Hands-on involvement in design, architecture, and development activities in the creation of applications ranging the entirety of the Research Process
Collaborate with your QA resources to ensure that the software you deliver is of the highest quality. (Our customers are not beta testers.)
Work on big, distributed, API-driven systems that operate on massive amounts of data in high transaction volume applications for tens of thousands of users, while producing bullet-proof code that is robust, efficient, and maintainable; our primary tools are C#, .NET Framework, Python, JSON, SQL Server, AWS and Databricks.

Requirements

databricks

.net

sql server

python

aws

bachelor’s

Experience with Databricks and Lakehouse architecture
3+ years of experience with SQL Server, writing SQL queries, data matching/cleansing/enriching as well as ETL/data pipeline engineering.
5+ years of .NET development (C#) development experience including cross-platform communication technologies such as Web API.
Bachelor’s Degree or equivalent experience.
Ability to analyse technical requirements and design new architectures, data models, and ETL strategies.
A demonstrable track record of building and launching successful products that leverage terabytes of data.
A track record of commitment to prior employers.
Experience with .NET Core., Python, Jupyter, Notebook, AWS and NoSQL databases.
Expertise in database design, complex T-SQL programming, performance tuning, and index analysis.
Hands-on experience with cloud-based relational and non-relational databases.

Benefits

Information not given or found

Training + Development

Information not given or found

Interview process

Information not given or found

Visa Sponsorship

Information not given or found

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.