Freelance Full Stack Developer Online Jobs in Chicago, IL

Anticipated End Date:
2026-06-03
Position Title:
Engineer Senior (Full Stack Developer)
Job Description:
Engineer Senior (Full Stack Developer)
Location: This role requires associates to be in-office 1 - 2 days per week, fostering collaboration and connectivity, while providing flexibility to support productivity and work-life balance. This approach combines structured office engagement with the autonomy of virtual work, promoting a dynamic and adaptable workplace. Alternate locations may be considered if candidates reside within a commuting distance from an office.
Please note that per our policy on hybrid/virtual work, candidates not within a reasonable commuting distance from the posting location(s) will not be considered for employment, unless an accommodation is granted as required by law.
The Engineer Senior (Full Stack Developer) is responsible for delivery of end-to-end applications, system development and maintenance on complex multi technology platforms within assigned client group, business unit or corporate department and utilizing various customer technology platforms.
How You Will Make an Impact:

• Design, develop, and implement robust, reusable full-stack applications with a focus on scalability, maintainability, and performance.
• Participate in and perform technical design reviews and code reviews to ensure high-quality, secure, and maintainable code.
• Define application scope, objectives, and technical specifications; develop and own technical enhancement backlogs and feature deliverables.
• Collaborate with cross-functional partners-including product, business, QA, and architecture-to understand requirements and translate them into technical solutions.
• Facilitate sessions for requirements clarification, technical design discussions, and troubleshooting complex issues.
• Work closely with product teams to plan and prioritize development work using disciplined agile practices with minimal supervision.
• Create and maintain technical documentation, including architectural diagrams, deployment procedures, and troubleshooting guides.
• Plan, schedule, and implement change deployments, framework upgrades, and maintenance activities.
• Investigate major incidents, summarize root causes, improve detection time, and drive faster, more resilient resolutions.
• Provide release and production support, ensuring systems are effectively monitored and deficiencies are proactively addressed.
• Assess current system status, support data and information planning, and ensure the stability of the technical development environment.
• Mentor team members, contribute to setting technical direction, and lead small to medium-sized projects as needed.
• Stay current with industry trends and emerging technologies to ensure adoption of best practices and continuous improvement.
• Support vendor/tool evaluations and collaborate across teams to align on standards and solutions.

Minimum Requirements:
Requires an BA/BS degree in Information Technology, Computer Science or related field of study and a minimum of 5 years related experience; multi-dimensional platform experience; expert level experience with business and technical applications, or any combination of education and experience, which would provide an equivalent background.
Preferred Skills, Capabilities & Experiences:

• Full-Stack Development: 5 years of experience with .NET Core, C#, ASP.NET, MVC, Web API, and front-end frameworks such as Angular or React; working knowledge of Java/Spring Boot is a plus.
• API & Microservices: Strong experience designing and developing microservices and RESTful APIs with an understanding of SOA principles, HTTP fundamentals, and modern API design patterns.
• Deep understanding of software development principles, SOLID object-oriented design, design patterns, dependency injection, and clean architecture best practices.
• Cloud, DevOps & Deployment: Familiarity with cloud platforms (Azure or AWS), authentication/AD, key vaults, CI/CD pipelines (Jenkins, UrbanCode, Bitbucket, Jira), containerization and orchestration (OpenShift, Kubernetes)
• Databases & Data Technologies: Hands-on experience with SQL Server, MongoDB, and Elasticsearch; conceptual understanding of ETL and data processing workflows.
• Experience with messaging platforms such as RabbitMQ, TIBCO, or similar technologies.
• Strong grasp of unit testing, integration testing, TDD concepts, automated test frameworks, and performance/load testing approaches.
• Knowledge of application monitoring, alerting techniques, troubleshooting, and performance optimization.
• Demonstrated ability to mentor others, lead small projects, troubleshoot complex issues, and excel in fast-paced agile environments with strong communication skills.
• Understanding of application security requirements, protocols, and frameworks is a plus.
• Experience in healthcare or insurance technology, familiarity with digital engagement trends, personalization, and modern analytical technology stacks is a plus.

For candidates working in person or virtually in the below location(s), the salary* range for this specific position is $132,088 to $198,132.
Locations: Illinois
In addition to your salary, Elevance Health offers benefits such as a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). The salary offered for this specific position is based on a number of legitimate, non-discriminatory factors set by the Company. The Company is fully committed to ensuring equal pay opportunities for equal work regardless of gender, race, or any other category protected by federal, state, and local pay equity laws.
* The salary range is the range Elevance Health in good faith believes is the range of possible compensation for this role at the time of this posting. This range may be modified in the future and actual compensation may vary from posting based on geographic location, work experience, education, and/or skill level. Even within the range, the actual compensation will vary depending on the above factors as well as market/business considerations. No amount is wages or compensation until such amount is earned, vested, and determinable under the terms and conditions of the applicable policies and plans. The amount and availability of any bonus, commission, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company's sole discretion, consistent with the law.
Job Level:
Non-Management Exempt
Workshift:
1st Shift (United States of America)
Job Family:
IFT > Engineering/Dev
Please be advised that Elevance Health only accepts resumes for compensation from agencies that have a signed agreement with Elevance Health. Any unsolicited resumes, including those submitted to hiring managers, are deemed to be the property of Elevance Health.
Who We Are
Elevance Health is a health company dedicated to improving lives and communities - and making healthcare simpler. We are a Fortune 25 company with a longstanding history in the healthcare industry, looking for leaders at all levels of the organization who are passionate about making an impact on our members and the communities we serve.
How We Work
At Elevance Health, we are creating a culture that is designed to advance our strategy but will also lead to personal and professional growth for our associates. Our values and behaviors are the root of our culture. They are how we achieve our strategy, power our business outcomes and drive our shared success - for our consumers, our associates, our communities and our business.
We offer a range of market-competitive total rewards that include merit increases, paid holidays, Paid Time Off, and incentive bonus programs (unless covered by a collective bargaining agreement), medical, dental, vision, short and long term disability benefits, 401(k) +match, stock purchase plan, life insurance, wellness programs and financial education resources, to name a few.
Elevance Health operates in a Hybrid Workforce Strategy. Unless specified as primarily virtual by the hiring manager, associates are required to work at an Elevance Health location at least once per week, and potentially several times per week. Specific requirements and expectations for time onsite will be discussed as part of the hiring process.
The health of our associates and communities is a top priority for Elevance Health. We require all new candidates in certain patient/member-facing roles to become vaccinated against COVID-19 and Influenza. If you are not vaccinated, your offer will be rescinded unless you provide an acceptable explanation. Elevance Health will also follow all relevant federal, state and local laws.
Elevance Health is an Equal Employment Opportunity employer, and all qualified applicants will receive consideration for employment without regard to age, citizenship status, color, creed, disability, ethnicity, genetic information, gender (including gender identity and gender expression), marital status, national origin, race, religion, sex, sexual orientation, veteran status or any other status or condition protected by applicable federal, state, or local laws. Applicants who require accommodation to participate in the job application process may contact elevancehealthjobssupport@elevancehealth.com for assistance. Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state, and local laws, including, but not limited to, the Los Angeles County Fair Chance Ordinance and the California Fair Chance Act.
Prospective employees required to be screened under Florida law should review the education and awareness resources at HB531 | Florida Agency for Health Care Administration.
NOTE: Workday keeps job postings active through 11:59:59 PM on the day before the listed end date. Example: If the end date is 3/13, the posting will automatically come down on 3/12 at 11:59:59 PM. In other words - the job is posted until 3/13, not through 3/13.