Remote New

Sr. Software Engineer

Agile Defense, LLC
United States
Dec 17, 2025
At Agile Defense we know that action defines the outcome and new challenges require new solutions. That's why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next. Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility-leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation's vital interests. Requisition #: 1340 Job Title: Sr. Software Engineer Location: Remote Salary: $110,000 - $135,000/year SUMMARY Agile Defense is seeking a skilled and driven Sr. Software Engineer to join our dynamic team. As a Sr. Software Engineer, you will contribute to the development and optimization of software systems that drive mission-critical outcomes for our clients. This role demands a technical expert eager to innovate, solve complex problems, and deliver high-quality software solutions in a collaborative and supportive environment. At Agile Defense, we are passionate about empowering our employees, fostering career progression, and maintaining a vibrant company culture that values innovation, teamwork, and diversity. Join a company that is committed to making a real impact through cutting-edge technology and industry-leading practices. JOB DUTIES AND RESPONSIBILITIES * Own end-to-end architecture for complex systems, including service boundaries, data models, API design, integration patterns, and non-functional requirements (scalability, performance, security, reliability). * Lead design and implementation of mission-critical applications and platforms in Java/Spring Boot, with React-based frontends that consume RESTful APIs. * Define technical standards and best practices for coding, testing, documentation, and observability; ensure adoption across teams. * Drive system integration strategies (REST, events, messaging), interoperability, and data consistency across services and platforms. * Champion secure-by-design principles: authentication/authorization (Spring Security, OAuth2/JWT), secrets management, secure data handling, least privilege, and compliance with industry standards. * Optimize performance across the stack: JVM tuning, SQL query optimization, caching strategies (e.g., Redis), API throughput, frontend rendering and bundle performance. * Establish robust reliability practices: SLAs/SLOs, error budgets, circuit breakers, retries, idempotency, graceful degradation, and disaster recovery plans. * Partner with product, UX, security, SRE/DevOps, and data teams to align architecture with business goals; translate complex technical concepts for non-technical stakeholders. * Lead technical planning, RFCs/ADRs, design reviews, and phased delivery plans; decompose large initiatives into measurable milestones. * Mentor and develop engineers (L2-L3); elevate code quality through constructive reviews, pairing, and guidance on design patterns and trade-offs. * Evaluate and introduce new frameworks, libraries, and cloud services; govern proof-of-concepts and production rollouts. * Oversee CI/CD, infrastructure-as-code, and automated testing strategies to enable frequent, safe releases. * Maintain high-quality documentation: architectural diagrams, API specifications (OpenAPI), runbooks, and operational playbooks. QUALIFICATIONS Education, Background, and Years of Experience * Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience). * 8-12+ years of professional software engineering experience, including leading large-scale, multi-team initiatives. ADDITIONAL SKILLS & QUALIFICATIONS Required Skills * Deep expertise in Java and Spring Boot for building production-grade, secure RESTful services. * Strong proficiency with React for building performant, accessible, and maintainable front-end applications. * Demonstrated success in systems architecture, integration, and scaling high-availability services. * Hands-on experience with relational and NoSQL databases, data modeling, indexing, transactions, and performance tuning. * Solid understanding of software security fundamentals (OWASP Top 10, threat modeling) and practical implementation using Spring Security, OAuth2/JWT. * Experience with cloud platforms (AWS/Azure/GCP), containers (Docker), and orchestration (Kubernetes). * Proven track record with CI/CD pipelines, automated testing (unit, integration, contract, end-to-end), and infrastructure-as-code. * Excellent communication and leadership skills; able to influence strategy and drive consensus across diverse teams. Preferred Skills * Microservices and event-driven architecture (Kafka/RabbitMQ) and API-first design (OpenAPI/Swagger). * Domain-driven design, clean/hexagonal architecture, and advanced design patterns. * Observability and operations: metrics, logs, traces (Prometheus/Grafana, ELK/Elastic, OpenTelemetry), capacity planning, incident management. * Performance profiling and tuning (JVM, GC, thread pools), SQL optimization, CDN and caching strategies. * Experience modernizing legacy systems or leading monolith-to-microservices migrations. * Governance of engineering standards and developer experience initiatives (platform engineering). WORKING CONDITIONS Environmental Conditions 100% remote Employees of Agile Defense are our number one priority, and the importance we place on our culture here is fundamental. Our culture is alive and evolving, but it always stays true to its roots. Here, you are valued as a family member, and we believe that we can accomplish great things together. Agile Defense has been highly successful in the past few years due to our employees and the culture we create together. What makes us Agile? We call it the 6Hs, the values that define our culture and guide everything we do. Together, these values infuse vibrancy, integrity, and a tireless work ethic into advancing the most important national security and critical civilian missions. It's how we show up every day. It's who we are. We also believe in supporting our employees by offering a competitive and comprehensive benefits package. To explore the benefits we offer, please visit our website under the Careers section. Happy - Be Infectious. Happiness multiplies and creates a positive and connected environment where motivation and satisfaction have an outsized effect on everything we do. Helpful - Be Supportive. Being helpful is the foundation of teamwork, resulting in a supportive atmosphere where collaboration flourishes, and collective success is celebrated. Honest - Be Trustworthy. Honesty serves as our compass, ensuring transparent communication and ethical conduct, essential to who we are and the complex domains we support. Humble - Be Grounded. Success is not achieved alone, humility ensures a culture of mutual respect, encouraging open communication, and a willingness to learn from one another and take on any task. Hungry - Be Eager. Our hunger for excellence drives an insatiable appetite for innovation and continuous improvement, propelling us forward in the face of new and unprecedented challenges. Hustle - Be Driven. Hustle is reflected in our relentless work ethic, where we are each committed to going above and beyond to advance the mission and achieve success. Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us. Apply for this job