APPLICATION DEVELOPER II

LSI, Inc.; Jacksonville (FL); On-site; USD 65,000 - 86,000; Full time

Job summary

LSI, Inc. is hiring an Application Developer II in Jacksonville, FL. This mid-level role designs, develops, tests, and maintains internal and customer-facing applications with limited supervision.

You will mentor junior developers, work with cross-functional teams on RESTful APIs and data processing, and contribute to secure, scalable software solutions. Candidates should have 2+ years of relevant experience and a relevant degree or equivalent training.

Qualifications

• Bachelor’s degree in Computer Science or Software Engineering with 2+ years of professional development.
• Or an associate degree with 4+ years of experience; or high school diploma with 6+ years.
• Bootcamp or technical training plus at least 3 years of relevant software development experience.
• Must be capable of safely handling government-furnished equipment and materials.
• Internal applicants with domain expertise in LSI applications may qualify with reduced formal experience requirements.

Responsibilities

• Provides advanced technical support and guidance for internal users, testers, and junior developers.
• Designs, develops, tests, deploys, and maintains software applications and system components in alignment with business goals and technical specifications.
• Implements new features and enhancements to improve performance, usability, and security.
• Authors and maintains detailed technical documentation, including system designs, specifications, and test results.
• Integrates front-end and back-end systems using RESTful APIs, web services, and data processing frameworks.
• Collaborates with team members to implement solutions and resolve complex issues.
• Conducts unit and integration testing to ensure quality and stability.
• Troubleshoots and debugs application issues following established processes.
• Participates in and occasionally leads code reviews to ensure adherence to coding standards and promote best practices.
• Contributes to continuous improvement by evaluating emerging technologies and implementing innovative approaches.

Skills

C#

TypeScript

OOP

SDLC

Agile/DevOps

RESTful APIs

SQL

Git

CI/CD

Frontend-Backend integration

Communication

Education

High School Diploma / GED

Tools

Microsoft SQL Server

Git

CI/CD tools

Job description

APPLICATION DEVELOPER II

Location

Job Type

Full-Time

Education

High School Diploma / GED

Travel

Up to 10%

Security Clearance

None

Job Description

About LSI

LSI is an employee-owned company that employs dynamic teams of professionals – people with the finest technical expertise, a level of passionate creativity, and a truly visionary outlook who deliver innovative training solutions that exceed our customers’ expectations. Everyone at LSI has a personal stake in our success. LSI has over 300 training support experts, engineers, and craftsmen on staff who develop state-of-the-art high-fidelity training devices, complex computer-based, highly interactive distributed learning products, and comprehensive, dynamic technical publications. LSI employee-owners collaborate to deliver training products and services for a myriad of programs and customers, using leading-edge technology and proven processes.

Mission

Our mission is to prepare our military and allies to be battle-ready through cutting-edge training products and services.

Vision

Our vision is to be the premier provider of military training solutions, renowned for our innovation and excellence. Through employee-ownership and teamwork, we will shape a future where every military service member is equipped to succeed in their mission.

SOP Sustainability:

We do everything within our control to meet project budgets and schedules, so our ESOP prospers.

Take Ownership

Each Employee-Owner takes ownership at the individual level for their words, actions, and results. Individual ownership breeds accountability. Accountability breeds trust. When we hold ourselves accountable and trust our fellow employee-owners to do the same, we realize success.

Clear Communication:

We project confidence in our communication using unambiguous language and providing clear purpose and direction.

Pursuit of Excellence

We aggressively pursue continuous improvement both as teams and individual employee-owners. We strive to get better every day. There is no room for mediocrity.

Pride in Our Work:

We know the value of our work and are proud of what we produce.

Customer Focus:

Customers are both internal and external and we strive to give both our best efforts.

Assume Positive Intent:

Assume others are well-intentioned in their actions and seek additional information about the circumstances to help solve problems. Assuming positive intent in all interactions is the key to building strong teams and working together to solve problems.

One Voice:

Every Employee-Owner is expected to speak up if they have an idea for improvement or if they disagree with a potential course of action. Once a decision is made, the entire team commits to it and moves forward with one voice.

Pay Range: $65K-$86K Annually

General Summary

The Application Developer II position is a mid-level software development role responsible for designing, developing, testing, maintaining, and optimizing internal and customer-facing applications with limited supervision. This position requires demonstrated proficiency in modern development technologies, strong problem-solving abilities, and the capability to mentor junior developers. The developer will collaborate closely with cross-functional teams to deliver robust, scalable, and maintainable software solutions.

Essential Job Functions

• Provides advanced technical support and guidance for internal users, testers, and junior developers.
• Designs, develops, tests, deploys, and maintains software applications and system components in alignment with business goals and technical specifications.
• Implements new features and enhancements to improve performance, usability, and security.
• Authors and maintains detailed technical documentation, including system designs, specifications, and test results.
• Integrates front-end and back-end systems using RESTful APIs, web services, and data processing frameworks.
• Collaborates with team members to implement solutions and resolve complex issues.
• Conducts unit and integration testing to ensure quality and stability.
• Troubleshoots and debugs application issues following established processes.
• Participates in and occasionally leads code reviews to ensure adherence to coding standards and promote best practices.
• Contributes to continuous improvement by evaluating emerging technologies and implementing innovative approaches.
• Safely handles government-furnished equipment and materials.
• Works a standard weekly schedule of 40 hours with overtime as required.
• Perform additional duties as assigned.

Knowledge, Skills, and Abilities

• Demonstrated strong analytical, debugging, and problem-solving skills with the ability to assess and resolve complex technical challenges.
• Thorough understanding of the software development lifecycle (SDLC) and methodologies such as Agile or DevOps.
• Solid grasp of object-oriented programming (OOP) and design principles.
• Proficiency with modern programming languages such as C# or TypeScript, and experience with modern frameworks.
• Strong understanding of front-end and back-end integration.
• Basic understanding of web technologies (HTML5, CSS3, and TypeScript).
• Hands-on experience with database design, SQL development, and performance optimization using Microsoft SQL Server or equivalent platforms.
• Familiarity with DevOps practices, version control (Git), and CI/CD tools.
• Effective communication and collaboration skills with the ability to convey technical concepts clearly to both technical and non-technical audiences.
• Proven ability to work independently or in a lead capacity on complex development tasks while maintaining high standards of quality and reliability.
• Must be capable of safely handling government-furnished equipment and materials.
• Must be available to work a standard weekly schedule with overtime as required.
• Perform other duties as assigned.

Education and Experience

• A bachelor’s degree in Computer Science, Software Engineering, or a closely related field from an accredited institution, and at least two (2) years of professional development experience; or
• An associate degree plus four (4) years of relevant experience; or
• A high school diploma plus six (6) years of experience; or
• Completion of a recognized coding bootcamp or technical training program, plus:
• At least three (3) years of relevant software development experience; or
• An associate degree or higher in any field.
• Internal applicants with demonstrated domain expertise in LSI applications, frameworks, or internal business systems may qualify with reduced formal experience requirements, provided they can:
• Exhibit comprehensive understanding of LSI application architecture, integrations, and coding standards; and
• Demonstrate hands‑on contributions to LSI core business tools that directly support organizational operations.
• To be considered, the applicant must be ready to review their past involvement on at least two major software features, regardless of technologies used where the applicant contributed a significant portion of the code. This will include a technical analysis of the personally written code, detailing the specific problem it solved, the decisions made during implementation, and a clear justification for why that particular approach was chosen to achieve the project’s goals.

Equal Opportunity Employer including Disability/Vets.