Lessen4mo ago

Senior Software Developer I

United States·ChicagoFull Time Employeesenior

OtherSoftware Developer

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Quick Summary

Overview

Lessen is the tech-enabled, end-to-end property service provider that is transforming how commercial and residential real estate services are delivered and managed at scale.

Technical Tools

csharpjavajavascriptagileci-cddatabase-design

Lessen is the tech-enabled, end-to-end property service provider that is transforming how commercial and residential real estate services are delivered and managed at scale. Lessen’s technology platform provides data-driven insights that unlock key growth opportunities for the entire real estate ecosystem—including investors, owners, managers, and service providers. The company leverages a network of over 30,000 vetted, qualified vendors (Lessen Affiliates) serving clients with over 1 million properties and completing more than 3.5 million work orders annually across an expanding range of services. Lessen, LLC is a venture-backed, privately held company with offices in Scottsdale and Chicago.

This role is based in Chicago, working in the office on Monday, Tuesday and Thursday.

Job Summary

The Senior Software Developer supports the Product and Technology Department by managing day-to-day activities within the organization's software development function. Senior Software Developer is part of an agile development team building and working on enterprise-grade software. Senior Software Developer is involved in all areas of development, from design to development to testing. They lead a small team of Software Developers.

Oversee the work of a team responsible for designing, building, testing, deploying, maintaining, and supporting applications or systems software.

Work to establish functional requirements and reviews solutions to ensure organizational needs are met.

Select and oversee implementation of one or more software development methodologies.

Develop short- and long-term product roadmaps to ensure continuous improvement of software.

Document and demonstrate solutions by developing documentation, flowcharts, layouts, diagrams, charts, code comments and clear code.

Prepare and install solutions by determining and designing system specifications, standards and programming

Improve operations by conducting system analysis, recommending changes in policies and procedures

Protect operations by keeping information confidential

Mentor junior developers

Keep up to date on the newest technological innovations in the field and be ready to apply relevant innovations.

Optimize new and existing applications.

Foster a positive team environment

Ensure confidentiality of internal and external data

Perform ad-hoc projects and other duties as assigned

Comprehensive understanding of object-oriented and service-oriented application development techniques and theories

Solid understanding of relational database design and querying concepts

Exposure to Microsoft .NET development using C#, or JAVA or other major languages

Exposure to web development using HTML5, CSS and JavaScript

Familiar with Design Pattern, algorithm

Knowledge of client/server application development

Knowledge of agile development methodologies

Knowledge of unit testing theory

Experienced with source control management systems and continuous integration/deployment environments

Experienced with debugging, performance profiling and optimization

Internally motivated, able to work proficiently both independently and in a team environment

Strong communication skills with both internal team members and external business stakeholders

Strong initiative to find ways to improve solutions, systems, and processes

Minimum Qualifications

Bachelor's degree in Computer Science, or with equivalent professional experience

Fluent in English and Mandarin preferred

5+ years of experience as a software developer

Hands-on experience building and deploying AI/ML features in production systems

Familiarity with real-world use cases (prediction, NLP, vision, recommendation, anomaly detection)

Ability to translate business problems into AI solutions

Why Lessen:

· Competitive compensation

· Health, Dental, Vision, Life, Disability options

· 401K retirement savings plan

· Paid vacation, federal and floating holidays

· Maternity/Paternity Pay

· Career advancement opportunities

· All the tools you'll need to be successful

Lessen is intentional about attracting, developing, and retaining amazing talent from diverse backgrounds. We’re looking for teammates that are enthusiastic, empathetic, curious, motivated, reliable, and will help us amplify the positive & inclusive culture we’ve been building. Lessen is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.

Location & Eligibility

Where is the job

Chicago, United States

Hybrid — some on-site time required

Who can apply

Listed under

United States

Listing Details

Posted: January 29, 2026
First seen: March 26, 2026
Last seen: June 15, 2026

Posting Health

Days active: 80
Repost count: 0
Trust Level: 33%
Scored at: June 15, 2026

Signal breakdown

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Apply for this position

Lessen

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Lessen is a tech-enabled, end-to-end property service provider that is transforming how commercial and residential real estate services are delivered and managed at scale.

Employees

3k+

Founded

2019

Domain

Jobs

External application · ~5 min on Lessen's site

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