Senior Developer

Grimco; Sunset Hills (MO); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical, Dental, Vision

Paid maternity/paternity leave

Paid holidays

401K with profit sharing

Employee referral benefits

Job summary

Grimco is seeking a Senior Developer to contribute to a platform that has powered the business for decades and continues to modernize across a multi‑platform stack. You will bring strong development fundamentals, the ability to learn across languages and environments, and the judgment to navigate complex systems confidently.

You will collaborate with IT, project management, QA, and business stakeholders to deliver well-scoped, well-documented solutions. U.S. work authorization is required.

Qualifications

• 5+ years of professional software development experience.
• Ability to learn unfamiliar languages, frameworks, or platforms.
• Strong SQL and relational database skills with data modeling.
• Experience building integrations between systems—APIs, file-based exchanges, ERP connectivity.
• Clear communication with non-technical stakeholders.
• Security awareness integrated into daily work.

Responsibilities

• Build and maintain business application features across a multi-platform technology stack.
• Design and implement integrations between internal systems, external partners, APIs, and data pipelines.
• Apply modern development practices — clean code, modular design, SQL-first data access, and structured testing.
• Serve as a technical resource on complex projects, contributing to design decisions and seeing work through to delivery.
• Identify and follow through on opportunities to modernize and improve existing systems.
• Collaborate with IT, project management, QA, and business stakeholders to deliver well-scoped, well-documented solutions.
• Learn, maintain, and expand RPG applications as part of a broader development role.

Skills

5+ years exp

Learning agility

SQL skills

System integrations

Communication

Security awareness

Job description

Do you want to work for a company where the people are the purpose? At Grimco, our developers operate across a real, multi-platform technology stack — and their work ships. As a Senior Developer, you’ll contribute to a platform that has powered the business for decades and continues to modernize. You’ll bring strong development fundamentals, an ability to learn and work across languages and environments, and the judgment to navigate complex systems confidently.

Job Description

Key Responsibilities & Duties

• Build and maintain business application features across a multi-platform technology stack.
• Design and implement integrations between internal systems, external partners, APIs, and data pipelines.
• Apply modern development practices — clean code, modular design, SQL-first data access, and structured testing — regardless of the language or environment.
• Serve as a technical resource on complex projects, contributing to design decisions and seeing work through to delivery.
• Identify and follow through on opportunities to modernize and improve existing systems.
• Collaborate with IT, project management, QA, and business stakeholders to deliver well-scoped, well-documented solutions.
• Learn, maintain, and expand RPG applications as part of a broader development role.

  Work Authorization: Candidates must be authorized to work in the United States. Grimco does not provide employment visa sponsorship (e.g., H-1B, O-1, TN) and will not do so in the future for this position.

Qualifications

Required Qualifications

• 5+ years of professional software development experience.
• Demonstrated ability to learn and work in unfamiliar languages, frameworks, or platforms.
• Strong SQL and relational database skills — you write efficient queries and understand data modeling.
• Experience building integrations between systems — APIs, file-based exchanges, ERP connectivity, or similar.
• Comfortable working with legacy code you didn’t write — reading, understanding, and improving it with confidence.Clear communication skills — you can explain technical decisions to non-technical stakeholders without losing the important detail.
• Security awareness baked into how you work, not treated as an afterthought.

Preferred Qualifications

• Background in distribution, warehousing, manufacturing, or order management systems.
• Experience with ERP platforms — custom-built or mid-market.
• Exposure to EDI or data interchange — X12 transaction sets, flat file automation, trading partner integrations.
• Cloud integration experience — REST/JSON APIs, Azure, AWS, or similar.
• Familiarity with IBM Power Systems or other enterprise backend platforms.
• RPG or IBM i development experience, or a demonstrated interest in the platform.

Additional Information

• Full medical, dental, and vision benefits available. Premiums have remained unchanged for more than 16 years.
• Paid Maternity/Paternity Leave.
• Paid Holidays.
• 401K with Profit Sharing, up to 6% of the employee’s total compensation earnings.
• Employee Referral Benefits.

Grimco is a national wholesale sign supply manufacturer and distributor with over 65 locations across North America and the United Kingdom. Founded over 150 years ago and still family-owned, we focus on delivering quality products and outstanding service to the sign industry. Our platform has powered the business for decades — and continues to evolve.

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