Top Senior Software Engineer Jobs in Jacksonville, FL

Lead technical design and delivery of complex, scalable SaaS features using AI-assisted development. Own specification quality, implement and review AI-generated code, design REST APIs, mentor engineers, and drive cohort-wide standards for architecture, testing, and DevOps practices.

Design, implement, and optimize high-performance backend services and APIs in Go. Architect scalable, fault-tolerant distributed systems using Kafka for large-scale data processing and streaming. Collaborate with product, frontend, and data teams; monitor and profile systems for performance and reliability; drive engineering best practices; and mentor junior engineers.

Develop, test, and maintain production-quality C++ software implementing Government Reference Architectures for mission-critical defense systems. Translate MBSE (SysML/Cameo) artifacts into interoperable components, implement APIs/ICDs, integrate distributed messaging frameworks (ActiveMQ/DDS/ZeroMQ), and maintain CI/CD, automated testing, containerized builds, and static analysis. Collaborate with systems engineers, architects, autonomy engineers, and government stakeholders to validate interoperability and performance.

Develop and integrate open-architecture, standards-based software for defense and aerospace systems. Implement and map interoperability standards (SOSA, FACE, AMS GRA, UCI), work with serialization formats (OMG IDL, protobuf, XSD, XMI), perform structural and semantic gap analysis, support interface/data model transformations, collaborate with multidisciplinary teams, produce documentation and interface specifications, and participate in architecture and design reviews.

Develop systems software to parse, reverse-engineer, and deterministically generate complex engineering data. Build tooling for schema translation, compiler/transpiler solutions, reproducible CI/CD pipelines, and automated document generation. Collaborate with multidisciplinary teams, support verification/validation, and apply MBSE concepts for engineering integration.

Lead cross-product engineering work: design APIs and data models, turn ambiguous customer problems into technical plans, implement and roll out features across web, APIs, CLI, integrations, and infra, debug production issues, and raise engineering quality through docs, reviews, and mentorship.

Design and implement system-level debugging, validation, and observability platforms. Build automated anomaly collection/analysis, visualization and root-cause tools, failure classification and monitoring frameworks. Extend compilers, runtimes and programming interfaces for profiling and instrumentation, improve bring-up and low-level debug workflows, lead cross-functional initiatives, support incident response, and establish debuggability and reliability best practices.

Lead backend architecture and implementation for scalable, reliable cloud-hosted web products. Mentor engineers, set standards, integrate agentic AI coding tools, design systems applying ML to large datasets, and balance customer-facing features with technical debt and performance.

Build data-rich, operational UIs for managing individual assets and fleets of autonomous and unmanned systems in distributed, bandwidth-constrained environments. Integrate frontends with backend APIs and platform services, handle complex asynchronous state, apply secure cloud-native deployment practices, and collaborate with cross-functional teams to deliver mission-focused software.

Design, build, and maintain scalable control-plane features for Cribl Stream to deploy, configure, and orchestrate distributed nodes. Collaborate with cross-functional teams to implement production APIs, automated tests, and reliability improvements. Participate in on-call rotations, incident response, and SaaS operations while using AI-assisted tools to improve development and operational efficiency.

Designs, builds, and maintains scalable backend and frontend systems (approx. 60% backend/40% frontend), including data pipelines, Kafka streams, REST APIs, and cloud-native deployments on AWS/Kubernetes. Participates in design/code reviews, on-call rotation, troubleshooting, performance optimization, testing, mentoring, and architectural discussions while championing API-first approaches and improving monitoring and tooling.

You will develop and maintain components of the LLVM based toolchain, collaborating with the community while ensuring platform-specific optimizations and tests.

The Senior Software Engineer will develop orchestration and autoscaling for the Lucenia search platform, working with cloud technologies and Kubernetes to manage services and mentor team members.

The Senior Software Engineer will focus on Lucene's distributed indexing and query capabilities, improve code features, and collaborate with a global team.

The Lead Quality Engineer will set quality standards, mentor a QA team, improve testing strategies, and enhance automation in AI-driven workflows.

As a Senior Software Engineer, you will develop product features end-to-end, collaborate with teams, and improve developer productivity.

The Senior Software Engineer will impact the architecture and development of a new platform, building scalable solutions and enhancing technical practices in a collaborative environment.

Design and develop scalable full-stack solutions, collaborate with teams to translate business requirements, and ensure code quality through reviews and testing.

Optimize Ubuntu integration across latest IoT and server-class hardware, lead customer engagements, and work with open source communities in a remote, collaborative environment.

The Senior Software Engineer will develop and enhance features for the Keeper Browser Extension, ensuring quality, security, and performance, while collaborating with cross-functional teams and following coding best practices.

Design, build, operate, and evolve backend services and runtime infrastructure for cloud orchestration and job execution. Own distributed, asynchronous systems, APIs, workers, persistence, and service-to-service coordination. Improve reliability, observability, testing, and operational tooling; lead cross-team designs and mentor engineers.

Design, build, and evolve scalable backend systems for WWE Champions. Support live-ops, incident management, reliability improvements, and pre/post-release backend support. Collaborate with client (Unity) engineers, drive technical roadmap, mentor cross-functional teams, and optimize performance and content pipelines for live mobile games.

Build full-stack features for AI voice and chat products using TypeScript, Node.js, React, and Python. Integrate ASR/TTS and LLM improvements, optimize production systems for latency and cost, participate in on-call rotations, and collaborate with ML and product teams to scale enterprise AI conversations.

Design, develop, and deploy Python- and Java-based scalable REST APIs for a multi-tenant web platform. Collaborate with product, data science, and clinical partners, and ensure software quality, security, and engineering best practices.

Join Twilio as a Staff Software Engineer to design and build scalable, reliable communication systems. Collaborate with cross-functional teams, mentor engineers, drive technical direction, perform architecture and code reviews, and deliver high-quality production services in a remote-first environment.