Senior Developer – FileMaker Platform

MainSpring; Frederick (MD); Remote; USD 75,000 - 120,000; Full time

Benefits offered by this job

Medical, Dental and Vision coverage

401k + company match

Paid Holidays

PTO

Bonus plans

Tuition Reimbursement

Employee Assistance Program

Referral Program

HRA with medical coverage

Remote-friendly culture

Job summary

MainSpring, Inc. is seeking an experienced Senior FileMaker Developer to design, develop, and implement FileMaker solutions for government and commercial clients.

You will integrate with REST, OData, and GraphQL APIs, manage FileMaker Server environments, and guide projects from requirements through deployment. The role emphasizes Agile processes, strong data modeling, and leveraging AI tools to boost productivity while ensuring security and quality.

Qualifications

• Bachelor’s degree in a related field preferred; or comparable experience is required.
• Extensive experience with the Claris FileMaker Platform and completion of all currently available Claris certifications.
• Ability to effectively leverage AI-powered development tools for design, code generation, troubleshooting, documentation, testing, and productivity.
• Strong experience with API integration, including REST, OData and GraphQL APIs; JSON and XML data structures; OAuth/token-based authentication.
• Experience with Agile lifecycle; proven track record managing development projects.
• Advanced knowledge of relational database and application design in FileMaker.
• Demonstrated ability to work in a development team, create task lists, timelines, and deliverables.

Responsibilities

• Design, develop, and maintain FileMaker applications across desktop, web, and mobile.
• Architect and implement integrations with third‑party applications via APIs.
• Administer, monitor, and optimize FileMaker Server environments for performance and security.
• Troubleshoot complex application, data integrity, and server issues.
• Manage projects including effort estimation, scope, risk, and timelines; gather requirements from stakeholders.
• Implement data migration, synchronization, and integration strategies between FileMaker and external systems.
• Create and maintain technical documentation and deployment procedures.
• Participate in lifecycle management including testing, deployment, and support.
• Ensure features stay in scope and communicate with team/client throughout projects.
• Provide budget and schedule updates to the Team Lead.

Job description

Job Location:Remote

Type:Full-time, Mon-Fri (EST)

Number of Openings:1

Start Date:Immediately
Salary Range: $75,000-$120,000 annually

Clearance Required:None

MainSpring, Inc. is looking for an experienced, innovative, and forward-thinking Senior FileMaker Developer. The Senior Developer is responsible for planning, designing, developing, and implementing creative application solutions for a variety of government and commercial U.S. and international clients. Adherence to proven processes and standards outlined in the MainSpring Agile Development process is required. The ideal candidate is efficient, exhibits meticulous follow-through, and possesses the ability to prioritize competing demands effectively. If you’re looking to join an organization with an exceptional work-life balance, look no further.

Essential Duties and Responsibilities

• Design, develop, and maintain custom FileMaker applications across desktop, web, and mobile environments. Develop and maintain scripts, calculations, layouts, custom functions, and automation workflows.
• Architect and implement integrations with third-party applications and services using APIs and other external connectivity.
• Administer, monitor, and optimize FileMaker Server environments to ensure performance, reliability, security, and availability.
• Troubleshoot and resolve complex application, performance, data integrity, and server-related issues.
• Manage projects and enhancement requests, including effort estimation, scope definition, risk analysis, and timeline development. Collaborate with business stakeholders to gather requirements and translate them into scalable technical solutions.
• Implement data migration, synchronization, and integration strategies between FileMaker and external systems.
• Create and maintain technical documentation, system architecture diagrams, and deployment procedures.
• Participate in application lifecycle management, including testing, deployment, upgrades, and support.
• Ensure project development/features remain in scope and proactively communicate with the team and the client throughout the course of projects.
• Provide budget and schedule updates to the Team Lead.
• Meet/exceed billable utilization targets.
• Maintain proficiency and certification in development platforms as required.
• Ability to effectively leverage AI-powered development tools and coding assistants as a force multiplier for application design, code generation, troubleshooting, documentation, testing, and productivity enhancement while maintaining strong engineering judgment, code quality, security, and solution ownership.
• Strong experience with API integration, including:
  • REST, OData and GraphQL APIs
  • JSON, XML and other data structures
  • OAuth and token-based authentication
• Advanced troubleshooting and root-cause analysis skills within the FileMaker platform, including experienced diagnosing and resolving:
  • Script performance issues
  • Data integrity concerns
  • Server performance bottlenecks
  • Authentication and connectivity issues
  • Complex application defects
• At least one tandem partner development skill, such as Sharepoint, Salesforce, PHP, VueJS, AppleScript, or SQL administration.
• Mid-level skills in JavaScript, HTML, and CSS, especially in relation to FileMaker webviewer interfaces and Klai (FMBetterForms).
• Experience with or understanding of the Agile Lifecycle required. Demonstrate a strong history of success with developing and managing development projects.
• Advanced knowledge of relational database and application design relating to FileMaker; Including scripting, data parsing, and the ability to search technical documentation.
• Demonstrate the ability to work as part of an application development team; create task lists, timelines and deliverables; work to meet project schedules determined by others.

Requirements

• Bachelor’s degree in a related field preferred; or comparable experience is required.
• Excellent communication and customer service skills.
• Extended experience with the complete Claris FileMaker Platform, and completion of all currently available Claris certifications.
• Ability to effectively leverage AI-powered development tools and coding assistants as a force multiplier for application design, code generation, troubleshooting, documentation, testing, and productivity enhancement while maintaining strong engineering judgment, code quality, security, and solution ownership.
• Strong experience with API integration, including:
  • REST, OData and GraphQL APIs
  • JSON, XML and other data structures
  • OAuth and token-based authentication
• Advanced troubleshooting and root-cause analysis skills within the FileMaker platform, including experienced diagnosing and resolving:
  • Script performance issues
  • Data integrity concerns
  • Server performance bottlenecks
  • Authentication and connectivity issues
  • Complex application defects
• At least one tandem partner development skill, such as Sharepoint, Salesforce, PHP, VueJS, AppleScript, or SQL administration.
• Mid-level skills in JavaScript, HTML, and CSS, especially in relation to FileMaker webviewer interfaces and Klai (FMBetterForms).
• Experience with or understanding of the Agile Lifecycle required. Demonstrate a strong history of success with developing and managing development projects.
• Advanced knowledge of relational database and application design relating to FileMaker; Including scripting, data parsing, and the ability to search technical documentation.
• Demonstrate the ability to work as part of an application development team; create task lists, timelines and deliverables; work to meet project schedules determined by others.

About MainSpring

MainSpring is an IT strategy and consulting firm that arms organizations with the strategy, tools and resources to grow. We foster a family-friendly, innovative, challenging, fun working environment earning the distinction of being one of The Washingtonian’s 50 Great Places to Work and countless awards for employee programs, growth and innovation.

• Medical, Dental and Vision coverage for employee and family
• 401k + company matched contributions 4% match on 5% contribution – Employee contribute on the 1st day of the month after 30 days; Company contributes on the first day of the quarter after 1 year - no vesting period!
• Group Term Life and Accidental Death and Dismemberment coverage (company provided)
• Short-Term and Long-Term Disability coverage (voluntary enrollment, company provided)
• Health Reimbursement Account (HRA) w/ medical coverage
• 7 Paid Holidays + 1 Floating Holiday
• Paid Time Off (PTO)
• Bonus plans
• Tuition Reimbursement Program
• Employee Assistant Program
• Employee Referral Program
• Dynamic Recognition and Rewards
• Work with Industry-Leading Talent
• Promotion and Advancement Tracks

Founded in 1993, MainSpring is headquartered in Frederick, Maryland and supports a wide range of clients including businesses, non-profits and government agencies.

Like our clients, people tend to stay at MainSpring. If you think you’re a match, let’s connect.