Top Principal Software Engineer Jobs in Austin, TX

Develop software for electronic warfare and defense systems, including SIGINT, aircraft protection, radar warning, and electronic attack. Responsibilities include backlog prioritization, software design evaluation, development milestone reviews, testing and validation, customer collaboration, project documentation, and automated digital delivery support. The role involves integration with systems, hardware, and test engineering teams and requires full-time on-site work.

Build and maintain secure integrations between Cloudflare and SaaS applications, taking projects from requirements through deployment. Develop AI agents, LLM-powered automation, MCP servers, and operational tooling to improve integration delivery and support. Collaborate with technical and business stakeholders, apply observability and cloud-native practices, participate in on-call rotation, and help govern AI tooling responsibly. The role is based in Austin, Texas, with potential in-person interviews.

Lead technical strategy and architecture for Azure Storage geo-replication, data protection, failover orchestration, and business continuity. Drive cross-team delivery, operational excellence, telemetry, automation, AI-assisted operations, and represent the team in executive and customer engagements.

The role involves designing and developing core features for the Linux sensor in CrowdStrike's security platform, collaborating with teams across the company, and maintaining software quality for cross-platform delivery.

Develops, enhances, tests, troubleshoots, and documents software throughout the development lifecycle. Reviews code, resolves defects, translates technical requirements into scalable solutions, and contributes to system architecture and development-process improvements. Requires substantial C++ experience, desktop engineering and OpenGL expertise, computational geometry knowledge, cross-platform development experience, and the ability to handle ITAR-controlled data. Relocation to Austin, Texas may be required.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

Refactor and migrate legacy U.S. Air Force web applications to a DoD software factory with minimal downtime. Build secure, tested software; identify technical debt; improve CI/CD and engineering practices; communicate technical tradeoffs to government stakeholders; and coach government engineers and military developers. The role works remotely with cross-functional teams and includes occasional travel to Air Force bases.

Leads hands-on development of production software while owning application and service architecture. Diagnoses systemic issues across components, coordinates integration efforts, and improves reliability, performance, and incident response. Builds scalable full-stack SaaS applications using Java, Spring Boot, TypeScript, Node.js, and React. Applies AI-assisted development tools, mentors engineers through influence, and makes technical decisions that balance maintainability, business needs, and client impact.

Principal Software Engineer leading architecture, development, and technical strategy for complex software platforms. The role requires designing scalable and secure systems, guiding engineering standards, mentoring engineers, resolving complex technical issues, and partnering with product, laboratory, and bioinformatics teams. Responsibilities include software architecture, React and .NET development, database optimization, REST APIs, distributed systems, DevOps, regulatory compliance, and long-term technology roadmaps supporting clinical and genomic workflows.

Design, develop, and operate highly scalable and resilient Azure VM Scale Set cloud services. Own features from architecture through deployment and operations, solve distributed-systems challenges at hyperscale, and drive reliability, security, performance, disaster recovery, testing, monitoring, automation, and engineering best practices. Collaborate across teams to deliver platform capabilities and customer outcomes.

Own the architecture, implementation, and operational excellence of major Azure Boost DPU software components. Develop low-level systems software spanning operating systems, virtualization, networking, storage, device management, and hardware interfaces. Lead complex cross-functional initiatives, optimize hyperscale performance and reliability, resolve system-level issues, establish engineering practices, influence platform architecture, and mentor engineers across Azure infrastructure teams.

Principal Software Engineer responsible for cross-cutting architecture, technical roadmap direction, and delivery quality. The role involves developing APIs, databases, UIs, and libraries with C# or JavaScript/TypeScript; guiding AI-assisted development; establishing testing and verification practices; mentoring engineers; improving tooling and workflows; collaborating cross-functionally; estimating work; and participating in on-call support. The position is fully remote with occasional travel.

Develops high-quality software and AI-powered prototypes for national security missions. Responsibilities include architectural design, feature development, automated testing, backlog grooming, sprint execution, API and SDK development, integration debugging, and research involving LLMs, embeddings, and smaller trained models. The engineer independently leads focused efforts while collaborating with product and engineering teams, using modern DevSecOps and CI/CD practices.

Leads technical direction for the Partner Services engineering area while remaining hands-on with mission-critical financial systems. Owns architecture roadmaps, ADRs, observability, reliability, security, technical investment, OKRs, and KPIs across multiple teams. Leads major incidents, drives AI-native engineering practices, partners with product and executive stakeholders, participates in architecture governance, and mentors engineers at every level. The role requires strong payments or banking familiarity, executive communication, and extensive technical leadership experience.

Leads technical strategy and architecture for a multi-team billing engineering workstream supporting payments, banking, treasury, and financial settlement. Remains hands-on while owning architecture roadmaps, ADRs, reliability, observability, security, AI-native engineering practices, technical investment, and business outcomes. The role partners with senior engineering and product leaders, manages high-stakes incidents, strengthens engineering maturity, and mentors engineers at every level.

Provides technical leadership for Azure SQL databases supporting a highly available Azure service. Responsibilities include database performance tuning, reliability and capacity planning, schema changes, data migrations, observability, incident response, root cause analysis, operational automation, and technical strategy. The role partners with software engineers, SREs, and architects to improve scalability, durability, cost efficiency, and long-term service reliability across teams.

Lead architecture and roadmap for Azure PostgreSQL systems; design and review scalable, maintainable database engine features (query processing, storage, transaction logging, recovery, versioning, IO, scale-out). Influence coding standards and run code reviews, write proof-of-concept or production code, contribute to open-source PostgreSQL/Linux, and participate in rotational on-call operations.

Provides technical leadership for Portfolio Management software systems within Investments. Architects scalable, high-performance, low-latency platforms; defines integrations and future-state architecture; develops foundational platform code; and enforces software quality, security, reliability, and performance standards. Mentors engineers, reviews code, supports business clients, advises stakeholders, and guides technology strategy. Requires extensive software engineering and financial services experience, with strong backend, cloud, DevOps, testing, and modern architecture expertise.

Design and evolve distributed search and analytics systems for the Splunk platform. Lead complex engineering efforts from design through delivery, improve performance and reliability, mentor engineers, collaborate cross-functionally, and work with customers to resolve production issues.

Lead technical direction and major multi-team projects for Chainguard Containers. Design and operate secure container build pipelines, registries, distribution systems, and adoption tooling. Remain hands-on with Go development, architecture, code review, observability, and on-call operations. Form roadmaps with product and engineering leaders, make product-level trade-offs, mentor senior engineers, collaborate across teams, contribute to open-source and industry standards, and establish safe AI-assisted engineering practices.

Provides senior technical leadership across engineering teams by shaping architecture, guiding complex software development, mentoring engineers, and driving scalable, secure, and reliable solutions. Responsibilities include hands-on coding, design reviews, API and system architecture, CI/CD and tooling improvements, cross-team technical alignment, project leadership, and partnership with product and design stakeholders. The role is remote with quarterly travel to Tampa, Florida.

Provides principal-level technical leadership across engineering teams, shaping architecture, engineering standards, scalable software solutions, and delivery practices. The role combines hands-on software development with design reviews, technical decision-making, mentoring, CI/CD and platform improvements, system reliability, and cross-team collaboration. It also partners with product and design stakeholders and may lead high-impact initiatives. Remote work is available with required quarterly travel to Tampa, Florida.

Leads the technical vision, architecture, and execution of AI performance, framework, benchmarking, and developer-productivity initiatives. Drives cross-team architecture, resolves complex systems trade-offs, mentors technical leaders, and contributes hands-on through prototyping, implementation, reviews, debugging, observability, and automation. Delivers measurable improvements in model onboarding speed, runtime performance, reliability, hardware utilization, and Azure capacity efficiency across models, frameworks, compilers, runtimes, systems, services, and hardware.

Lead technical direction for Elastic’s billing experience platform. Design and evolve public and internal APIs, build full-stack billing and account-management features, and shape scalable architecture and data models. Improve reliability, observability, deployment, CI/CD, and incident response across cloud services. Mentor engineers, review technical work, influence roadmap priorities, collaborate across Product, Design, SRE, Finance, and Cloud teams, and participate in on-call rotations.

Designs, develops, configures, and supports Edifecs healthcare EDI solutions and transaction mappings. Works with 837, 834, 835, 820, and 270/271 transactions; troubleshoots transmissions, configures validations, and develops Groovy scripts. Leads Agile and DevOps efforts, mentors engineers, supports QA, and designs scalable AWS applications using containers, microservices, and CI/CD. Provides technical leadership, architecture guidance, performance tuning, and stakeholder consultation.