Top Senior C# Jobs in Houston, TX

Design and develop scalable enterprise software for the Lending team. Build backend systems using .NET, Python, relational and NoSQL databases, messaging systems, Docker, and AWS. Plan, triage, and prioritize work while applying object-oriented programming, SOLID principles, domain-driven design, distributed systems, and event-driven architecture practices.

Leads the design, development, integration, testing, and optimization of laboratory information management systems and related applications. Develops APIs, data pipelines, interfaces, and integrations with laboratory instruments and enterprise systems. Provides technical leadership, mentors developers, troubleshoots complex issues, supports testing and escalated incidents, maintains documentation, and ensures regulatory, audit, security, and data integrity compliance.

Develops, integrates, secures, tests, deploys, and supports full-stack enterprise solutions across web, digital banking, APIs, databases, cloud platforms, and Symitar/Episys systems. Responsibilities include front-end and back-end development, API integrations, database optimization, automated testing, CI/CD, documentation, production troubleshooting, security, compliance, and technical guidance throughout the software development lifecycle.

Build and operate full-stack certificate management, security, monitoring, and vulnerability products. Develop TypeScript APIs and React frontends, design MySQL schemas, manage AWS workers and Kubernetes infrastructure, maintain legacy .NET and Python services, integrate partner APIs, improve CI/CD and observability, participate in on-call support, and develop AI-assisted features. The role includes code reviews, testing, incident resolution, technical documentation, and mentoring engineers.

Develop and support software applications, REST and ASP.NET web services, distributed systems, data integrations, and storage solutions. Analyze requirements, optimize performance, resolve application issues, implement security and data protection, and collaborate with product, business, and QA teams. The role includes technical documentation, quality reviews, managing competing priorities, and mentoring less experienced developers.

Lead technical delivery for Life Insurance and Annuity clients: design solutions and architectures, produce technical design docs, mentor distributed teams, drive code quality and integrations (APIs), maintain mainframe and .NET codebases (COBOL, C#, DB2/SQL), and leverage AI tools (GitHub Copilot, Claude Code, custom agents) for automation and efficiency.

Owns enterprise integration architecture across data and application systems. Defines integration standards, designs and builds complex integrations, creates reusable reference architectures, leads strategic architecture programs, modernizes legacy ESB and point-to-point systems, and governs security, reliability, observability, and data integrity. The role also coaches engineers and advises technical and business stakeholders across global teams.

Design, develop, and maintain scalable billing and invoicing systems using C# and PHP. Lead architecture, code reviews, mentoring, CI/CD improvements, monitoring, database optimization, security, and PCI DSS compliance. Use Claude and Cursor in daily development while validating generated code for correctness, security, performance, and maintainability. Collaborate across Product, Engineering, QA, and support teams to deliver reliable payment-processing services and resolve complex technical issues.

Build and lead a scalable platform engineering function spanning CI/CD, infrastructure, observability, developer tooling, environments, and production operations. Develop internal tools, reusable automation, paved roads, and AI-assisted workflows that improve developer experience, delivery reliability, and engineering productivity. Partner across teams, guide architecture and standards, measure DORA and DX metrics, and shape the platform roadmap while providing hands-on technical leadership.

Deploys, integrates, hardens, and operates modular C-UAS data and software platforms in secure DoD environments. Builds data pipelines across classification boundaries and disconnected conditions, integrates mission systems, manages Kubernetes-based infrastructure, supports accreditation, and handles observability, incident response, upgrades, and backup recovery. The role also documents solutions, trains mission teams, represents field needs to engineering, and mentors junior forward-deployed data engineers. Most work is remote with occasional travel to restricted environments and SCIFs.

Lead electrical and instrumentation CAD design for power-generation and industrial projects. Oversee drawing production, deliverables, constructability, safety, budgets, staffing, schedules, bills of materials, quantity takeoffs, and 3D model development. Integrate laser scans, LiDAR, vendor files, and survey data; coordinate with engineers, project managers, clients, and multidisciplinary teams. Check peer work, maintain standards, support proposals, lead remote CAD teams, and participate in meetings requiring occasional travel.

Design, test, document, and deploy geospatial software solutions for defense and intelligence imagery. Integrate analytical toolkits with ArcGIS, define user requirements, lead lab testing and automated QA efforts, and collaborate on software releases. The role applies remote sensing, photogrammetry, image processing, and AI while mentoring colleagues and managing project dependencies.

Develop and maintain software using C#, .NET, web technologies, SQL Server, and AWS. Participate in the full SDLC and Agile Scrum processes, including design, development, unit testing, defect resolution, backlog refinement, and collaboration with product and QA teams. Build solutions using Microsoft-stack technologies, optimize databases and stored procedures, and support cloud-based application delivery.

Develops and supports secure full-stack applications and integrations across Microsoft Dynamics 365, Business Central, Power Platform, and Azure. Responsibilities include building C#/.NET APIs and services, creating React-based web experiences, implementing authentication and cloud security, troubleshooting production systems, and managing CI/CD through GitHub or Azure DevOps. The role partners with technical and business stakeholders to translate requirements into maintainable solutions, resolve defects, and improve platform reliability.

Leads hands-on Appian application development across design, coding, testing, deployment, maintenance, production support, and incident triage. Serves as the senior developer on an Agile team, coordinating with product owners, business analysts, UX, and QA. Produces architecture and technical documentation, guides integrations and security modeling, oversees development tasks, performs peer reviews, and supports compliance, risk management, and continuous Appian platform improvement.

Develop custom applications, integrations, and system updates for Jenzabar customers using C#, .NET, XML, SQL, REST APIs, and Boomi. Responsibilities include requirements gathering, solution design, troubleshooting, programming, customer consulting, statements of work, training, collaboration, and mentoring application programmers.

Leads QA automation initiatives by developing and maintaining automated functional, regression, API, and integration test suites for Guidewire software and mobile applications. Improves CI/CD pipelines, performs root cause analysis, drives quality improvements, collaborates with developers and product owners, and mentors junior QA engineers.

Build and maintain scalable, cloud-native APIs and high-value core system components using .NET and related technologies. Lead software architecture and testing discussions, enhance core offerings, collaborate cross-functionally, and ensure quality through code reviews, unit testing, functional testing, telemetry, and performance tuning. Mentor teammates and contribute to continuous technical and process improvement.

Leads a team of automation engineers supporting semiconductor fabrication and transceiver assembly. Oversees design, deployment, and maintenance of equipment automation, MES interfaces, factory systems, SECS/GEM interfaces, and data collection solutions. Drives productivity, quality, capacity, and cost improvements; manages projects, metrics, vendors, equipment acceptance, troubleshooting, training, and incident response. The role is on-site in a cleanroom environment and requires extended hours when needed.

Develop and maintain automated calibration systems using LabVIEW, integrating NI hardware and third-party instrumentation. Build automated test procedures, user interfaces, data management solutions, and measurement workflows. Collaborate with metrology teams to align procedures with calibration standards and uncertainty requirements. Troubleshoot software, hardware, and procedure issues; document systems; train users; and communicate technical solutions to customers and stakeholders.

Develop and support a cloud-native workload credentials management solution within a SaaS platform. Responsibilities include designing scalable full-stack services, orchestration, APIs, distributed systems, and microservices; providing technical leadership; leading projects through delivery; collaborating cross-functionally; mentoring engineers; and applying engineering best practices. The role requires extensive Go development, cloud and SaaS expertise, modern JavaScript frameworks, and experience operating enterprise systems at scale.

Leads complex SaaS and digital banking implementations, including configuration, customization, validation, troubleshooting, third-party integrations, and post-go-live stabilization. Serves as the primary technical resource for client engagements, coordinates with project managers, engineers, vendors, and customers, and translates technical issues into actionable solutions. Develops implementation documentation, improves processes, mentors junior engineers, manages concurrent priorities, and communicates platform enhancement opportunities to product and engineering teams.

Design, build, and maintain scalable applications, APIs, mobile platforms, booking systems, clinical integrations, and healthcare data systems. Own features end to end, make architectural decisions, improve security and reliability, and contribute to cloud deployment, CI/CD, monitoring, and DevOps. Collaborate with clinical, operations, and patient experience teams to deliver secure digital tools that improve patient care and clinic efficiency.

Build full-stack software, backend services, APIs, frontend experiences, and shared integration capabilities supporting AI initiatives across Keeper’s products. Integrate LLMs, agents, and tool-calling workflows into secure production environments while maintaining zero-knowledge principles. Troubleshoot cross-product systems, improve reliability and observability, contribute to architecture and code reviews, automate testing and CI/CD, and collaborate with AI, product, and engineering teams.

Build and maintain secure, scalable backend systems for Mindbody products. Design microservices, write tested and maintainable code, monitor applications, participate in reviews, and collaborate with Product, Design, QA, and Engineering teams. The description also includes leadership responsibilities such as managing backend development teams, coaching managers and engineers, establishing delivery processes, and driving technical and organizational improvement.