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  • Software Engineer I, Launch Program 2026 Mastercard works to connect and power a sustainable and inclusive global economy. We are a vehicle for commerce, a connection to financial systems for the previously excluded, a technology innovation lab, and the home of Priceless...
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    Work experience placement
    Internship

    MasterCard

    O Fallon, MO
    1 day ago
  • Senior Software Engineer O'Fallon, Missouri contract Rate: DOE U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. We are unable to sponsor the currently Job Description Java, Spring, and Spring Boot Required. Everything is developed...
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    Contract work

    Staffing the Universe

    O Fallon, MO
    21 hours ago
  • $115k - $184k

    Senior Software Engineer Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices...
    Suggested
    Full time
    Part time
    Worldwide
    Flexible hours

    Missouri Staffing

    O Fallon, MO
    4 days ago
  • Senior Software Dev Engineers O'Fallon MO (remote FOR NOW but will need to eventually be onsite) We can consider fully remote for a very strong candidate Looking for 2 Senior Software Dev Engineers This is part of
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    Remote work

    Samprasoft

    O Fallon, MO
    4 days ago
  • Job Description Job Description Hi, Greetings from Resource Informatic Group! We are urgently looking for a “Software DevelopmentEngineer II” in O’fallon MO. please go through with below JD & send me thematching profiles: Job Description: Role : Software...
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    Work experience placement
    Remote work

    Resource Informatics Group Inc

    O Fallon, MO
    15 days ago
  • Job Title Need strong Testng, Selenium, Java Coding experience Must have: Bachelors or Masters in CS or related degrees. Minimum of 6+ years with Master or 8+ years with Bachelors of hand on experience in software development in test automation, concurrent coding skills...
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    Staffing the Universe

    O Fallon, MO
    2 days ago
  • Job Description Job Description Hi, Greetings from Resource Informatic Group! We are urgently looking for a “Lead Front End Developer” in O’fallon MO. please go through with below JD & send me the matching profiles:   Job Description: Role : Lead Software...
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    Work experience placement
    Remote work

    Resource Informatics Group Inc

    O Fallon, MO
    15 days ago
  • Lead Full Stack Engineer Job Location: O'Fallon, MO (Hybrid onsite 3 days/week) Job Travel Location(s): Must be able to travel to office as needed Positions: 1 Employment Type: C2H Duration: Long Term Key Technology: Java, Full Stack, SQL Job Responsibilities: Lead...
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    Work at office
    3 days per week

    Veracity

    O Fallon, MO
    2 days ago
  • $138k - $221k

    Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions...
    Suggested
    Full time
    Part time
    Worldwide
    Flexible hours

    MasterCard

    O Fallon, MO
    2 days ago
  • $115k - $184k

    Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions...
    Suggested
    Full time
    Part time
    Worldwide
    Flexible hours

    MasterCard

    O Fallon, MO
    4 days ago
  • $138k - $221k

    Lead, AI Security Engineer As an Information Security Engineer specializing in AI Security, you will be at the forefront of protecting our AI systems and data. Your role will involve deep technical expertise in designing, implementing, and maintaining advanced security...
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    Full time
    Part time
    Flexible hours

    MasterCard

    O Fallon, MO
    1 day ago
  • Senior Azure Platform Engineer Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using ...
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    MasterCard

    O Fallon, MO
    1 day ago
  • $85.15k - $153.93k

    Job Description Description The Leidos FS2 Aero team has an opening for an experienced Full Stack Software Developer r to modify existing code and integrate software solutions for the Aeronautical Navigation Office. The ideal candidate has an excellent understanding...
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    Work at office

    Leidos

    Saint Charles, MO
    8 days ago
  • $138k - $221k

    Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions...
    Suggested
    Full time
    Part time
    Worldwide
    Flexible hours

    MasterCard

    O Fallon, MO
    2 days ago
  • Job Description Job Description Who we are: Founded in 2009, GBI ( is a rapidly growing fintech/commodities company, building groundbreaking technology to enable wealth management professionals access to physical precious metals for their clients. Our software...
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    Full time
    Contract work
    Work experience placement
    Remote work

    Gold Bullion International LLC

    Saint Charles, MO
    16 days ago
  • Job role: Senior Software Engineer- (Azure, M365) Location: O'Fallon Missouri (Local Candidates ONLY or willing to relocate.) Duration: 12 months+ Overview - The overall objective of this engagement is to manage and execute an organizational network analysis...
    Local area
    Relocation
    Flexible hours

    Marvel Technologies Inc

    O Fallon, MO
    3 days ago
  • Job Title: Junior Email Marketing Developer Location: On-Site (OFallon, MO) Position Type: Full-time Exempt Summary: Milestone Marketing Solutions is looking for a marketing professional looking to specialize in data-driven email deployment and analytics. From...
    Full time
    Apprenticeship
    Work at office
    Local area
    Flexible hours

    Automotive Product Consultants Llc

    O Fallon, MO
    3 days ago
  • Reinventing Geospatial (RGi) is a leading expert in geospatial solutions for Defense, Intelligence, and Federal clients. We enhance situational awareness for soldiers and analysts by integrating software development with geospatial intelligence. Our projects range from...
    Full time
    Immediate start

    Reinventing Geospatial, Inc. (rgi)

    Wentzville, MO
    21 hours ago
  • Reinventing Geospatial (RGi) is a leading expert in geospatial solutions for Defense, Intelligence, and Federal clients. We enhance situational awareness for soldiers and analysts by integrating software development with geospatial intelligence. Our projects range from...
    Full time
    Local area
    Immediate start

    Reinventing Geospatial, Inc. (rgi)

    Wentzville, MO
    21 hours ago
  • $110k - $200k

    Direct Hire Opportunity with Full Benefits. Excellent 401K matching! This Jobot Job is hosted by: Brooke Meyer Are you a fit? Easy Apply now by clicking the "Apply Now" button and sending us your resume. Salary: $110,000 - $200,000 per year A bit about us: We specialize...
    Local area

    Jobot

    Saint Charles, MO
    4 days ago
  • Hi, Our client is looking for a Senior Mainframe Developer with a Full Time in O'Fallon, MO. below is the detailed requirement. Position : Senior Mainframe Developer Location : O'Fallon, MO Duration : Full Time Mandatory Skills:...
    Full time

    Lorven technologies

    O Fallon, MO
    2 days ago
  • At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next. Our vision is to bring adaptive innovation...
    Full time

    Agile Defense

    O Fallon, MO
    21 hours ago