Backend Software Engineer III (FSI)

Accelint is a mission-driven technology company focused on strengthening national security and supporting critical industries. We build the technologies that help operators and organizations see what’s happening, make faster and better decisions, take action with confidence, and stay ready for what comes next. Our work includes advanced sensors, autonomous systems, mission command and control software, AI-enabled training and simulation, and tools that improve logistics, maintenance, and overall readiness.  

For nearly 30 years we have supported military and civilian agencies across the Department of Defense, U.S. allies and partners, and essential industries. When you join Accelint, your work directly contributes to protecting national security and strengthening the systems our society depends on.  

Accelint brings together the talents of Hypergiant, Forward Slope, Systems Innovation Engineering, SoarTech, and Highbury Defense Group under one mission, with each entity contributing deep expertise in its domain. This role is part of our Forward Slope (FSI) division, which focuses on C2, engineering, cyber, and international programs. FSI integrates complex systems, transforms geospatial and operational data into clear insights, and supports naval, joint, and allied missions with technical rigor and global perspective. 

Accelint is seeking a Backend Software Engineer III to help design, build, and evolve features and modules for a Command and Control (C2) platform. In this role, you will contribute to backend services that support mission-critical operations, geospatial visualizations, and force planning. You will take ownership of backend capabilities, influence architectural decisions, and mentor other engineers while delivering reliable systems for customers around the world.

Job Description

• Backend Software Engineer III – Product Development
• Full time
• Remote, Hybrid, and Onsite options – San Diego, CA

Duties & Responsibilities

• Design, implement, and evolve various subsystems that make up our modular C2 platform
• Translate operational and product requirements into robust backend capabilities
• Break down complex problems using use case analysis, specifications, and UML-style design artifacts
• Own backend capability streams end-to-end, from design through deployment and sustainment
• Apply design patterns and engineering best practices to ensure system reliability and scalability
• Design and maintain data models, APIs, and service integrations
• Mentor other engineers through code reviews, design discussions, and technical guidance
• Contribute to continuous improvement of development processes and platform architecture

Required Qualifications

• Bachelor’s degree in computer science, engineering, mathematics, physics, or related field
• 7+ years of demonstrated development experience with:
• • Object-oriented programming experience (e.g., Go, Python)
  • Delivering production systems where reliability and correctness are critical
  • Passion for high-quality, well-tested, maintainable code
  • Mentoring or technically leading other engineers
• Proficiency in all or some of the following areas:
• • Complex data modeling and database design
  • Data Access Layer (DAL) design patterns
  • Asynchronous messaging technologies (e.g., WebSockets, NATS.io)
  • Relational databases (PostgreSQL, MySQL)
  • Standards-based REST API design and implementation
  • Authentication and authorization using OIDC / OAuth 2.0
  • Unit testing frameworks and testing strategies
  • Build dependency management tools
  • Containerization and orchestration (Docker, Kubernetes)

Preferred Qualifications

• Frontend technologies (Node.js, React, TypeScript)
• GitLab CI/CD build automation
• GIS data management or processing
• CesiumJS

Clearance Requirements 

Some positions will require access to U.S. National Security information.  Positions that require this access will be required to receive and maintain a U.S. government personnel security clearance (PCL).  In order to qualify for this position, the candidate must be a US Citizen and either currently possess this National Security eligibility or be able to complete the investigation application process with a favorable determination and maintain that eligibility throughout their employment. To learn more about the security clearance process please access this link.  

EEOC & Know Your Rights 

Accelint companies are Equal Opportunity Employers. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, status as a protected veteran or any other status protected by applicable federal, state, and local law. We ensure that all employment decisions, including hiring, promotion, compensation, and other terms and conditions of employment, are based on merit, qualifications, and business needs. For more information about your rights, please review the "Know Your Rights" poster from the Equal Employment Opportunity Commission (EEOC). Know your Rights: English Spanish 

Pay Scales & Benefits 

The listed pay scale reflects the broad, minimum to maximum, pay scale for this position for the location for which it has been posted and is not a guarantee of compensation or salary. Other compensation considerations may include, but are not limited to, job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, or other applicable factors. 

Benefits include… 

• Paid Time Off 

• Paid Company Holidays 

• Medical, Dental & Vision Insurance 

• Optional HSA and FSA 

• Base and Voluntary Life Insurance 

• Short Term & Long-Term Disability Insurance 

• 401k Matching 

• Employee Assistance Program