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Jack Henry & Associates Senior Software Engineer ( C#/.NET Core/WebAPI ) in Lenexa, Kansas

Senior Software Engineer ( C#/.NET Core/WebAPI )



Position Level

Individual Contributor


Information Technology

Position Type


Working Time



Allen, Texas, Charlotte, North Carolina, Lenexa, Kansas, Monett, Missouri, Remote, Remote, Springfield, Missouri

Travel Requirements


Description & Requirements

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At Jack Henry & Associates, we deliver technology solutions that are digitally transforming and empowering community banks and credit unions to provide enhanced and streamlined user experiences to their customers and members. Our best-in-class products are just the start as we lay the groundwork for the future of digital banking and payments. We hope you’ll join us. We can’t do it without you.

The Software Engineer plans, participates, and works with our team in close cooperation with our product design and API teams. Software Engineers are constantly keeping our apps up to date with the newest development practices to offer exciting user experiences for highly secured data. Although you work in a team you are self-motivated and able to work with independence. You care deeply about your work, your team, and the end user.

About the Treasury Management team

This team is constantly keeping your services up to date with the newest development, deployment, and release practices to offer exciting user experiences with highly secured data. Your team also collaborates with other teams to build tools and processes that help scale our rapidly growing platform.

Our team is highly distributed, meaning you will work with kind, talented individuals from across the United States. You’ll get the chance to choose your own tools, work with bleeding edge web technologies across the stack and contribute to products that are used by thousands of people.

This position will be filled to work at the following Jack Henry office locations: Lenexa, KS, Monett, MO, Springfield, MO, Charlotte, NC, Allen, TX, or Remotely within the U.S.

What you’ll be responsible for:

  • Complete product technical design and prototyping, software development, bug verification and resolution.

  • Participate in all aspects of the development process including documenting, technical design, coding, code reviews, QA, and delivery.

  • Collaborate with customers, engineers, designers, and other stakeholders in the development of new features.

  • Perform release validation testing and beta support for projects.

  • Research problems and develops solutions to the problems.

  • Conduct unit testing and integration testing for functionality and limits.

  • Assist in training and mentoring less experienced peers.

  • May perform other job duties as assigned.

What you’ll need to have:

  • Minimum 6 years of experience in software development.

  • Minimum 4 years of experience with Microsoft .NET/C#/ASP.NET.

  • Minimum 3 years of experience with API’s/Web Services.

  • Experience with .NET Core 2.0 and higher.

  • Experience in a Senior level Developer or Senior Engineer role.

  • Ability to travel up to 5% to attend JHA meetings, trainings, and/or professional conferences.

What would be nice for you to have:

  • Bachelor’s degree in Software Engineering or Computer Science.

  • Experience with MS Azure or other cloud technologies.

  • Experience with MS Entity Framework.

  • Experience with Test Driven Development and Unit Testing.

  • Experience with Redis.

  • Experience with APIs and Middleware.

  • Experience with design patterns and/or SOLID principles.

  • Experience with multitenancy software platforms.

If you got this far, we hope you're feeling excited about this opportunity. Even if you don't feel you meet every single requirement on this posting, we still encourage you to apply. We're eager to meet motivated people who align with Jack Henry’s mission and can contribute to our company in a variety of ways.

Why Jack Henry?

At Jack Henry, we pride ourselves through our motto of, "Do the right thing, do whatever it takes, and have fun." We recognize the value of our associates and believe much of our company’s strength and success depends on their well-being. We demonstrate our commitment by offering outstanding benefit programs (https://jackhenry.avature.net/careers/LifeAtJHA) to ensure the physical, mental & financial wellbeing of our people is always met.

Culture of Commitment

Ask our associates why they love Jack Henry, and many will tell you it is because our culture is exceptional. We do great things together. Rising to meet challenges and seeking opportunities is part of who we are as an organization. Our culture has helped us stay strong through challenging times and we credit our dedicated associates for our success. Visit our Corporate Responsibility site (https://discover.jackhenry.com/corporate-responsibility) to learn more about our culture and commitment to our people, customers, community, environment, and shareholders.

Equal Employment Opportunity

At Jack Henry, we know we are better together. We value, respect, and protect the uniqueness each of us brings. Innovation flourishes by including all voices and makes our business—and our society—stronger. Jack Henry is an equal opportunity employer and we are committed to providing equal opportunity in all of our employment practices, including selection, hiring, performance management, promotion, transfer, compensation, benefits, education, training, social, and recreational activities to all persons regardless of race, religious creed, color, national origin, ancestry, physical disability, mental disability, genetic information, pregnancy, marital status, sex, gender, gender identity, gender expression, age, sexual orientation, and military and veteran status, or any other protected status protected by local, state or federal law.

No one will be subject to, and Jack Henry prohibits, any form of discipline, reprisal, intimidation, or retaliation for good faith reports or complaints of incidents of discrimination of any kind, pursuing any discrimination claim, or cooperating in related investigations.

Requests for full corporate job description may be requested through the interview process at any time.