Senior Fullstack Developer (Backend)

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.  

We are seeking a backend-leaning Full-Stack Engineer to build and integrate concept capabilities for an Uncrewed Surface Vessel (USV) autonomy and mission software platform. This role is centered on Python networking, backend service development, real-time data movement, distributed systems integration, and C++ interfaces/components. Frontend experience, especially with Svelte/SvelteKit, is a plus, but it is not the primary focus of the position. 

You will work on the software and networking backbone behind operator-facing capabilities: telemetry transport, service-to-service communication, simulation integration, protocol adapters, message pipelines, and vessel-adjacent interfaces. The ideal candidate is comfortable moving between backend application code, networking behavior, containerized deployments, and lower-level integration work. 

Duties & Responsibilities:

USV Concept Delivery & Integration 

• Deliver integrated concept demonstrations for USV workflows such as mission execution monitoring, route execution support, vehicle health/status, operator oversight, and simulation-backed demonstrations. 

• Connect backend services to simulation, replay, and vessel-adjacent systems so concepts reflect realistic telemetry cadence, state transitions, faults, and mission events. 

• Support end-to-end integration across services, data streams, and mission software components. 

Backend Engineering (Python / Networking / Distributed Systems) 

• Develop Python services, adapters, and tooling to support concept development, data translation, automation, replay, and simulation hooks. 

• Implement and maintain real-time interfaces such as REST APIs, WebSockets, TCP/UDP communication paths, streaming pipelines, and pub/sub patterns. 

• Design and troubleshoot inter-service communication, connection management, reconnection behavior, message routing, and high-rate telemetry handling. 

• Work within distributed architectures common to autonomy stacks, including Redis or Valkey, DDS, pub/sub buses, and other message-oriented systems. 

• Diagnose backend and networking issues such as service discovery failures, QoS/config mismatches, dropped connections, environment drift, and runtime logging problems. 

C++ & Lower-Level Integration 

• Contribute to or interface with C++ components where performance, hardware interaction, protocol handling, or existing subsystem integration requires it. 

• Work across mixed-language systems where Python services integrate with C++ libraries, binaries, or networked components. 

• Assist with protocol and device integration efforts relevant to autonomy or vehicle systems. 

Frontend & Full-Stack Support 

• Support frontend or operator-facing application work as needed, including integration with existing web interfaces. 

• Svelte or SvelteKit experience is beneficial for full-stack collaboration, but deep frontend specialization is not required. 

Orchestration, Deployment & Maintainability 

• Work across containerized and orchestrated deployments including Docker, Docker Compose, and Kubernetes. 

• Add pragmatic test coverage for critical backend