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Application Developer II
McCarthy Holdings, Inc. —St. Louis, MO
- Full-time
- Azure
- System design
- Mid-level
1d

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Application Developer II

McCarthy Holdings, Inc. -
St. Louis, MO

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Job Details

Full-time
1 day ago

Qualifications

Containerization systems
Data model design
Secure web application development
DevSecOps Practices
Test scanning software
Systems integration
Azure
Node.js
Data modeling projects
XML
Threat Modeling (Architecture security)
Enterprise software
.NET Core
C#
AI tools proficiency
Checkmarx
System design
Agile scheduling
Public Cloud
Mid-level
Enterprise software support
Schema design
Enterprise software systems development
3 years
Encrypted communication protocols
SQL
Event-driven architecture
Collaboration with product development teams
AWS
MuleSoft Anypoint Platform

Full Job Description

POSITION SUMMARY

McCarthy is seeking a full-time Application Developer located in St. Lous, MO who as part of the Enterprise Solutions and Analytics team, will play a crucial role in building our application and integration portfolio, supporting our existing systems and driving innovation following modern DevSecOps practices.

RESPONSIBILITIES

Solution Design and Development

Design and develop integration solutions by applying best practices and standard patterns in data model design, data transfer and event-based processing. Leverage integration capabilities such as Rest APIs, message queues and remote process execution in developing solutions. Implement solutions that process both structured and unstructured data (images, videos, model files etc.).
Design and develop custom applications on AI platform Palantir, integrating them into McCarthy’s ecosystem of applications.
Develop solutions for maximum reusability, using components available in enterprise applications and platforms. Promote modular approach in solution design and development. Maintain a robust integration application and integration environment to promote long-term flexibility and growth.
Support the procurement of new applications and platforms by evaluating technical capabilities and providing insight.

Support and Administration

Provide technical support and guidance for efficient and effective resolution of issues. Respond to queries from application teams in a timely manner to reduce disruption to end users.

Security

Ensure integration and application solutions follow McCarthy’s security practices and guidelines.
Enforce input validation and output encoding, avoid hardcoded secrets and credentials, apply least privilege logic in API and service interactions, use strong modern cryptography, sanitize logs, and perform threat modeling early and regularly.
Adhere to and promote a shift-left security mindset for pipeline, secrets management and supply chain functions.

Project Execution, Task Management

Follow best practices and support organizational effort in managing projects and tasks effectively. Demonstrate an agile mindset in planning and execution of tasks.

Continuous Learning and Improvement

Constantly seek to improve current solutions. Identify opportunities to improve performance, automate workflows and improve end-user experience.
Keep up with the latest on tools and platforms by attending vendor events and leveraging learning opportunities.

Internal Relationship Management

Develop strong partnerships with internal IT staff to ensure solutions address McCarthy’s needs effectively and requests are addressed in a timely and effective manner. Work closely with business system analysts and product owners in understanding requirements and building solutions that implement user stories effectively.

QUALIFICATIONS

3 – 5 years of experience with an enterprise iPaas (integration platform as a service) such as Boomi, Mulesoft or Snaplogic. Boomi experience would be preferable.
Strong knowledge of database capabilities and API-driven integration frameworks. Strong knowledge of SQL. Solid understanding of data formats including JSON and XML.
Experience developing solutions on an AI platform such as Palantir is a plus.
3 – 5 years of application development experience on a modern stack (e.g., .NET 6+/C#, Node.js/TypeScript, Python, Ruby — Ruby on Rails/Sinatra/ActiveRecord) building RESTful services, event-driven components, and CI/CD-backed deployments; familiarity with containers and cloud services is a plus.
Working knowledge of DevSecOps practices and tools (DAST/SAST/SCA/secrets scanning) and severity-based remediation workflows in CI/CD. Examples of tools include Checkmarx, OWASP, GitHub, Snyk, Terrasan and Terraform
Practical experience with secure file transfer (SFTP), key management, and PGP encryption in automated pipelines.
Knowledge of cloud platforms such as AWS, Azure and Microsoft Office 365.
Experience working on projects using an Agile approach and the Scrum framework.
Constant learner with a passion for continuous growth and improvement.
Strong interpersonal and communication skills. Strong team player with a collaborative mindset.

McCarthy is proud to be an equal opportunity employer, including disability and protected veteran status.

NOTICE TO EXTERNAL SEARCH FIRMS: McCarthy’s Talent Acquisition Team is the only authorized representative permitted to engage with external search firms, staffing agencies, or other third-party recruiting partners. McCarthy maintains an Approved Agency List for recruiting partners, which is reviewed and updated annually.

McCarthy will only consider submissions from agencies with a signed fee agreement in place for the current year. McCarthy does not accept unsolicited resumes, candidate submissions, or referrals from agencies that do not meet these requirements.

If a candidate is submitted without an active agreement, McCarthy will have no obligation to pay any fees and reserves the right to contact, engage, interview, or hire such candidate(s) without any financial or other responsibility to the submitting agency. Unsolicited resumes, including those sent directly to hiring managers or other employees, will be considered the property of McCarthy.

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