Top Senior Software Engineer Jobs in Houston, TX

As a Software Engineer at Citadel, you will build systems for investments, collaborate with researchers, and tackle complex problems.

Build and operate resilient software platforms across on-premises and cloud environments. Responsibilities include architecture, capacity planning, vulnerability remediation, Kubernetes and CI/CD infrastructure, AI/ML workspace management, observability, incident and problem management, chaos engineering, production troubleshooting, vendor coordination, and cross-functional delivery of infrastructure and resiliency initiatives.

Leads the development and deployment of data solutions using Palantir Foundry and AIP. Manages engineering teams, coaches team members, oversees project planning and execution, analyzes system interactions, manages client relationships, and drives innovation. The role applies software engineering, data engineering, analytics, and AI/ML techniques to deliver scalable client solutions while maintaining technical and professional standards.

Leads the development and deployment of software and data solutions using Palantir Foundry and AI/ML technologies. Responsibilities include data engineering, analytics, system improvement, client account management, project ownership, team leadership, coaching, stakeholder engagement, and continuous improvement. The role requires building scalable applications with large datasets and delivering customer-focused solutions.

Build and operate high-throughput backend services for AI agents, calendar, scheduling, integrations, real-time data pipelines, and APIs. Design platform infrastructure, event-driven systems, and client-server protocols using Go, PostgreSQL, Kubernetes, and cloud platforms. Collaborate with AI, product, and frontend teams, improve reliability through testing and infrastructure as code, and mentor junior engineers.

Leads software engineering work within an agile team, designing, developing, testing, troubleshooting, and supporting secure, scalable backend applications. Builds microservices, reviews production code, improves application resilience, automates recurring remediation, and evaluates architectural solutions with vendors and internal teams. Promotes responsible AI-assisted development, secure coding, automated testing, and reuse of engineering practices while mentoring teams and driving technical outcomes.

The Founding Engineer will lead the development of Sailor Health's AI-powered platform, building systems for patient care and mentor the engineering team.

Build the core AI platform for an AI-native trading experience. Develop a high-performance Rust backend supporting streaming responses, low-latency tool execution, caching, and model orchestration. Design secure, observable APIs and runtime components with authentication, authorization, rate limiting, auditing, tracing, retries, and fallbacks. Build safe trading action infrastructure with deterministic previews, confirmations, idempotency, and audit logs while partnering with product and frontend teams.

Own and improve Hex’s cloud infrastructure, CI/CD, observability, databases, security, cost management, and single-tenant deployment systems. The role involves selecting and delivering infrastructure projects, operating Kubernetes and AWS environments, scaling PostgreSQL, implementing infrastructure as code, and building customer-facing platform capabilities. Engineers are expected to handle on-call responsibilities, write application code when needed, and independently turn ambiguous infrastructure problems into shippable solutions.

Leads development of secure, scalable Java full-stack software for a digital identity team. Designs, codes, tests, troubleshoots, and reviews production applications; improves resiliency and automation; promotes responsible AI-assisted engineering practices; and evaluates vendor and architectural solutions. Requires cloud-native experience with AWS and Kubernetes, REST API development, agile delivery, security, and CI/CD. Familiarity with IAM technologies and ForgeRock or Ping Identity is preferred.

Build and ship backend features end-to-end using Ruby on Rails and SQL. Lead complex technical projects, solve architecture challenges, establish standards, conduct meaningful code reviews, resolve high-risk bugs, document systems, collaborate across engineering teams, and mentor junior engineers.

Leads development of secure, scalable software solutions within an agile financial-services environment. Responsibilities include designing, coding, testing, debugging, reviewing production code, improving application stability through automation, applying AI-assisted engineering practices responsibly, and evaluating vendor and architectural solutions. The role requires advanced Python expertise, cloud-native experience, SDLC proficiency, software security knowledge, and familiarity with banking technology systems.

Leads the design, development, testing, integration, and delivery of complex security software applications. Provides architecture leadership, evaluates designs for quality and compliance, integrates new technologies, manages development partners, troubleshoots application issues, and mentors junior engineers. The role focuses on Windows application development, software architecture, security features, and cross-functional project leadership.

Leads the design, development, optimization, and troubleshooting of embedded firmware and software for hardware products. Oversees complex development projects, coordinates internal and outsourced engineering teams, documents protocols and requirements, ensures hardware-software integration, evaluates designs for compliance and quality, introduces new technologies, and mentors less-experienced engineers.

Develops and maintains mission-focused software across the full lifecycle, including requirements analysis, software architecture and design, coding, unit testing, integration, formal testing, delivery, documentation, and debugging. Works with multidisciplinary teams and applies software standards, processes, and development tools. The role may involve C/C++, real-time operating systems, Agile development, MBSE, and software requirements engineering. A Final Secret clearance and U.S. citizenship are required.

Develops and maintains simulation software for NASA’s Orion spacecraft program. Responsibilities include designing, coding, testing, debugging, and documenting logical and mathematical models using C++, Python, MATLAB/Simulink, and Linux. Supports full software development lifecycle activities, real-time and hardware-in-the-loop simulations, software configuration management, user support, and compliance with software engineering standards.

Lead software test engineering activities across the full development lifecycle, including requirements analysis, coding, unit testing, integration testing, verification, qualification, and formal delivery. Develop and debug software using Perl, Python, and C++, while ensuring standards and requirements are met. Collaborate with multidisciplinary teams and apply embedded systems, Agile, and DevSecOps practices. The role requires an active Interim Secret Clearance, eligibility for Final Secret, U.S. citizenship, and a STEM bachelor's degree.

Develops, tests, debugs, documents, and maintains software for business and mission applications. Applies software development lifecycle standards, resolves program errors, analyzes system capabilities, and supports multithreaded applications using C++, Python, Linux, networking technologies, and related development tools.

Designs, develops, tests, deploys, and supports scalable cloud applications and microservices. Builds backend services with C# and .NET, frontend applications with Angular and TypeScript, and REST APIs. Uses Microsoft Azure, Git, Azure DevOps, CI/CD pipelines, automated testing, code reviews, troubleshooting, and production support. Collaborates with cross-functional Agile teams and may contribute to Docker, Kubernetes, monitoring, and energy-domain solutions.

Own end-to-end commercial navigation features for fleet customers across mobile, backend, and web platforms. Build reliable, tested, observable software for challenging conditions such as poor connectivity and changing routes. Collaborate with product, design, Maps, Telematics, and customer-facing teams to define priorities, success metrics, and tradeoffs. Ship and maintain customer-facing experiences, with opportunities to use React Native, Swift, Kotlin, geospatial technologies, and AI-assisted development tools.

Design, build, and operate backend services for Toast’s Business Map platform, including location and organization APIs. Own features from design through production rollout, testing, monitoring, and feature-flagged deployment. Collaborate with partner teams, participate in on-call support, resolve production issues, write technical designs, conduct code reviews, and mentor newer engineers.

Design, implement, and optimize MongoDB database integrations, Change Data Capture and streaming capabilities, and observability systems. Develop high-performance C++ services, contribute to query engine and distributed systems architecture, lead projects from design through production support, and collaborate with product and engineering teams on technical roadmaps.

Leads software engineering and SRE initiatives for secure, scalable production platforms. Designs Python or Java automation, LLM and agent solutions, data pipelines, monitoring, and resiliency practices. Owns application security, risk controls, compliance, lifecycle management, incident response, and service-level objectives. Coordinates execution across engineering teams, promotes AI-assisted development, and coaches teams on secure, responsible AI adoption.

Lead development of scalable Java backend applications and high-availability cloud services. Design architectures, REST APIs, databases, caching systems, and distributed session infrastructure. Mentor engineers, drive technical initiatives, address performance and scalability challenges, and uphold quality and automation practices for endpoint management products.

Lead technical strategy and execution for Affirm’s account management team, building secure, scalable fullstack systems and customer account security experiences. Collaborate with product, design, analytics, and engineering teams; establish quality, monitoring, testing, and operational standards; support availability and on-call practices; communicate technical decisions; and mentor engineers.