Full Stack Developer (Senior-Level) at Millennium Trust Company (Chicago, IL)

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MILLENNIUM TRUST COMPANY is a rapidly-growing, leading financial services company offering specialized retirement and institutional services. Whether clients are managing corporate retirement assets, running a business or wanting choice beyond traditional asset options, we provide flexible and digital solutions to support our clients’ success. Ultimately, we aim to educate and increase access to investments to help our clients on their journey to retirement readiness, but do not provide investment advice.

Millennium Trust has experienced year-to-year double digit growth and prides itself on its strong, progressive culture. We have been recognized for our tremendous growth on lists, such as Crain’s Fast 50 and Inc. 5000, and have also been recognized for our positive workplace culture on the 2019 Best Places to Work in Illinois list, as well as the 2019 Model Workplace Award and 2018 Champion for Young Professionals Award from the Greater Oak Brook Chamber of Commerce. Millennium Trust employees live out the values of Do Right, Excel, Collaborate, Innovate and Celebrate and deliver the brand promise of going “Above and Beyond,” so each client experiences the highest level of service.

We are always looking to expand our growing team with dynamic and enthusiastic individuals. If you enjoy a collaborative, fun environment that encourages career development, Millennium Trust is the place for you!

We are looking for a Senior Full Stack Developer to produce scalable software solutions working alongside a team of experienced developer leaders. You’ll be part of a cross-functional team that’s responsible for the full software development life cycle, from conception to deployment.

As a Senior Full Stack Developer, you will have relevant experience both front-end and back-end coding languages, software development architecture and design patterns, development frameworks and third- party libraries. You should also be a team player with a knack for visual design and utility.

If you are looking to take the next step in your career and be a part of a fast growing company focused on the delivery innovative products and an excellent client experience, then we want to hear from you!


  • Work with development teams and product managers to ideate software solutions

  • Develop visually appealing front end website architecture, including translating designer mock- ups and wireframes into front-end code

  • Develop functional databases, applications, and services to support websites on the back end

  • Develop and design RESTful API services in adherence to best practices and standards

  • Design user interactions on web pages

  • Implement mobile responsive designs

  • Stay abreast of developments in web applications and programming languages

  • Ensure that non-functional requirements such as security, performance, maintainability, scalability, usability, and reliability are being considered when architecting solutions.

  • Keep job knowledge up-to-date by studying new development tools, programming techniques, and computing equipment; participating in educational opportunities; reading professional publications; maintaining personal and professional networks; participating in professional organizations.

  • Test software to ensure responsiveness and efficiency

  • Troubleshoot, debug and upgrade software

  • Create diagrams and technical documentation

  • Other duties as assigned


  • Bachelor’s degree in Computer Science, Statistics or related field 

  • 5 – 7 years’ experience as a Full Stack Developer or similar role

  • Proficiency with:

    • OOP Principles, Domain Driven Design, CQRS, and Event Sourcing

    • C# v7.0+, .NET Core 3.x, EF Core 3.0, AS.NET Web Services (API/REST)

    • HTML/CSS, JavaScript, JQuery, DOM manipulation, JavaScript object model, Node.JS

    • Modern React (Hooks, Context, Suspense), MaterialUI, GraphQL, Mocha, Nock

    • Transformation/Post development toolchains (e.g., Typescript, WebGrease, Swagger)

    • SQL Server, Azure Cosmos DB, or MongoDB

    • OTP, JTW, and OAuth2.0, Auth0 and or Azure Identity Access Management (B2B/B2C)

    • NUnit, PostMan, Selenium, BrowserStack

  • Experience with one or more cloud platforms (e.g., Salesforce, Heroku, Azure, AWS)

  • Experience with cloud message APIs and usage of push notifications, and websockets

  • Excellent communication and teamwork skills

  • Great attention to detail and organizational skills

  • Experience with Agile/Scrum methodology

  • Experience with Azure DevOps, Git, CI/CD, SecDevOps, and Containers

  • Experience delivering individual and institutional client facing solutions; Web Portal(s), online payments, and third-party integrations

  • Experience with developing financial platforms Portfolio Management, or Trading platforms

  • Experience delivering secure, high performance, fault tolerant, and high availability solutions

  • Development experience for native mobile applications preferred

  • Experience with Robotic Process Automation platforms, Multiexperience Development Platforms, Mulesoft development, Blockchain/Smart contracts development, and exchange integrations preferred

  • Experience with Azure AI+ML, Integrations, Blockchain, Compute, Application Service Environments, and Bot Framework preferred

Check out a video on our Company Culture! Millennium Trust Culture

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Technology we use

  • Engineering
  • Product
  • Sales & Marketing
    • C#Languages
    • JavaLanguages
    • JavascriptLanguages
    • PythonLanguages
    • SqlLanguages
    • jQueryLibraries
    • ReactLibraries
    • Node.jsFrameworks
    • MongoDBDatabases
    • MySQLDatabases
    • Google AnalyticsAnalytics
    • IllustratorDesign
    • PhotoshopDesign
    • ConfluenceManagement
    • DrupalCMS
    • SalesforceCRM
    • Salesforce Marketing CloudEmail


Our company is located in the heart of Oak Brook, within steps of Oakbrook Center mall.

An Insider's view of Millennium Trust Company

What are some social events your company does?

Our MTC culture is defined by our employees for our employees. The primary aspect of our culture that makes us so unique is our ability to “Celebrate”. From charity events to social gatherings, we provide employees with multiple opportunities to learn more about one another, give back to others and expand our professionals skills!

Rebecca Karnoscak

Senior Human Resources Coordinator

What does your typical day look like?

I collaborate with our internal business users to gather requirements for projects and enhancements. I develop these solutions using both no-code and code methodologies in Salesforce. It's rewarding knowing that we're making life easier for both our internal and external clients through streamlined, automated processes, and shorter turnaround time.

Alec Dorner

IT Business Developer/Analyst

How has your career grown since starting at the company?

I started out as a Sales & Marketing Coordinator at MTC in 2013. I’ve since been promoted twice, and asked to lead our MTCulture Team. I test-drove my leadership skills early on by volunteering for opportunities to lead small meetings/projects, join internal and external committees, organize events and workshops. I always welcome a challenge!

Lauren Schulz

AVP, Regional Director, Custody Services

How do you make yourself accessible to the rest of the team?

Throughout the transition to a virtual work environment, I have continued with a “virtual” open door policy. I give visibility into my workload and transparency about my availability through the use of MS teams, email and open dialogue on current and upcoming projects.

Rachel Guinan

Accounting Manager

What are Millennium Trust Company Perks + Benefits

Millennium Trust Company Benefits Overview

We provide a full range of competitive benefits, augmented by what we'll call 'soft' benefits like our state-of-the-art office building with fitness center (free access/membership) and business-casual dress code.

Volunteer in local community
Partners with Nonprofits
Eat lunch together
Intracompany committees
Open door policy
Open office floor plan
Dedicated Diversity/Inclusion Staff
Diversity Employee Resource Groups
Health Insurance & Wellness Benefits
Disability Insurance
Dental Benefits
Vision Benefits
Health Insurance Benefits
Life Insurance
Pet Insurance
Wellness Programs
Onsite Gym
Retirement & Stock Options Benefits
401(K) Matching
Performance Bonus
Child Care & Parental Leave Benefits
Generous Parental Leave
Family Medical Leave
Vacation & Time Off Benefits
Generous PTO
Paid Holidays
Paid Sick Days
Perks & Discounts
Casual Dress
Professional Development Benefits
Tuition Reimbursement
We offer eligible employees a company funded contribution applied to a qualified higher education student loan. This benefit helps employees pay off their student loans faster and save money.
Lunch and learns
Promote from within
Time allotted for learning

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