Senior Software Engineer - Informix

We are seeking a highly skilled and proactive Senior Software Engineer – Informix to lead the development, enhancement, and support of mission-critical applications built on the IBM Informix platform. This individual will be responsible for technical leadership within an agile team, hands-on software development, troubleshooting, and guiding efforts to modernize legacy systems.
This role requires deep experience with Informix 4GL, exceptional analytical skills, and the ability to mentor junior team members while collaborating with stakeholders across engineering, QA, operations, and business units.Primary Responsibilities:Technical Execution (50%)

• Lead the design, development, testing, deployment, and support of enhancements to Informix-based applications.

• Write and maintain high-quality code using Informix 4GL, with a focus on performance, reliability, and maintainability.

• Analyze and resolve complex system issues related to configuration, software design, data accuracy, and system performance.

• Operate confidently in AIX or UNIX environments for application deployment, system troubleshooting, and performance tuning.

• Ensure application health and availability through root cause analysis and proactive monitoring.

• Support QA and user acceptance testing efforts to ensure production readiness.
  

Collaboration & Problem Solving (20%)

• Serve as a technical liaison across teams and business stakeholders to clarify requirements and propose effective solutions.

• Collaborate closely with other engineers and product owners to deliver on sprint commitments and technical objectives.

• Participate in agile ceremonies and provide thoughtful input during sprint planning, retrospectives, and technical design sessions.

• Lead knowledge sharing efforts and encourage collaborative problem-solving across the team.

Mentorship & Leadership (20%)

• Provide guidance and mentorship to junior developers and new team members.

• Support the onboarding process and promote engineering excellence across the team.

• Participate in code reviews, technical planning, and architectural discussions with a focus on quality and long-term sustainability.

Continuous Improvement (10%)

• Recommend and implement improvements to legacy systems, including opportunities for refactoring, modernization, or automation.

• Contribute to the development of internal tools, documentation, and best practices.

• Explore and evaluate new technologies that may complement or enhance existing Informix solutions.

• Identify and help reduce technical debt while maintaining business continuity.
  

Required Qualifications:

• Bachelor’s degree in Computer Science, Information Systems, or a related field.

• 5+ years of experience in software engineering roles, including development and support of production systems.

• Proven expertise with IBM Informix and Informix 4GL.

• Experience working in Agile development environments.

• Strong skills in troubleshooting, root cause analysis, and system optimization.

• Proficiency with version control and SDLC tools such as Git, Azure DevOps, PVCS, and JIRA.

Preferred Qualifications:

• Familiarity with modern design patterns and ability to refactor legacy codebases using these approaches.

• Understanding of RESTful APIs and asynchronous messaging patterns.

• Experience with or interest in .NET-based development.

• Exposure to cloud environments such as Azure, GCP, or AWS.

• Understanding of message-oriented middleware (e.g., Azure Service Bus, RabbitMQ).

• Ability to diagnose and resolve hosting/environment-related issues in on-premise or hybrid infrastructure.

At Inmar, we put people first and that means empowering our associates to thrive at every stage of life and career. Our comprehensive and competitive benefits package is thoughtfully designed to support a wide range of lifestyles and life stages.

Eligible associates have access to:

• Medical, Dental, and Vision insurance

• Basic and Supplemental Life Insurance options

• 401(k) retirement plans with company match

• Health Spending Accounts (HSA/FSA)

We also offer:

• Flexible time off and 11 paid holidays

• Family-building benefits, including Maternity, Adoption, and Parental Leave

• Tuition Reimbursement and certification support, reflecting our commitment to lifelong learning

• Wellness and Mental Health counseling services

• Concierge and work/life support resources

• Adoption Assistance Reimbursement

• Perks and discount programs

Please note that eligibility for some benefits may depend on your job classification and length of employment. Benefits are subject to change and may be governed by specific plan or program terms.

We are an Equal Opportunity Employer, including disability/vets.

Recruitment Fraud Notice: Recruitment fraud is an increasingly common scam where individuals pose as employers to offer fictitious job opportunities. Scammers sometimes impersonate Inmar recruiters on LinkedIn and other channels. We will never ask for payment or sensitive personal information during the hiring process. Verify any role on our official Workday Careers site and learn how to spot scams in our full notice.

This position is not eligible for student visa sponsorship, including F-1 OPT or CPT. Candidates must have authorization to work in the U.S. without the need for employer sponsorship now or in the future.