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Senior Software Engineer

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HaystackMissouri, MOJune 17th, 2026

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We're hiring on behalf of a Haystack partner!The Role• Contribute to the design, development, testing, and implementation of software solutions under guidance from senior engineers.• Develop and maintain application code in accordance with established engineering, quality, and security standards.• Create and execute unit tests and support automated testing efforts.• Participate in code reviews and incorporate feedback to improve code quality.• Assist with troubleshooting, defect resolution, and application support for critical systems.• Collaborate with cross-functional teams to deliver assigned work on schedule and adhere to compliance requirements.What You'll Need• Bachelor’s degree in computer science, Engineering, Information Technology, or equivalent practical experience.• Foundational knowledge of software engineering concepts and the software development lifecycle.• Experience with one or more programming languages, with Java being a primary requirement.• Familiarity with Agile development practices, testing concepts, and version control systems.• Strong analytical, problem-solving, and communication skills.• Ability to work effectively in a collaborative, team-based environment and a willingness to learn new technologies.What's On Offer• Competitive annual salary ($92,000 - $147,000) plus potential for annual bonuses.• Exposure to secure, scalable service development and enterprise engineering standards within a global technology company.• Comprehensive benefits package including health insurance, retirement plans, and generous paid time off.• Opportunities for professional growth and development in the dynamic payments industry.Apply via Haystack today!