Top Senior C# Jobs in Houston, TX

Develop, automate, and execute tests for React UI, NextJS middleware, and C# APIs. Build test automation across business domains, triage and prioritize work, mentor teammates, and collaborate with internal and external teams to ensure reliable, performant, and scalable Online Banking services.

Design, build, and lead AWS-based contact center solutions (Amazon Connect, Salesforce Service Cloud Voice). Develop integrations, implement CloudFormation/Lambda, apply IaC and CI/CD, perform code reviews, provide technical advisory, documentation and training, and ensure secure, scalable architectures.

Design, build, test, and maintain enterprise applications and integrations for VA healthcare modernization. Work in Agile teams to develop APIs, microservices, CI/CD pipelines, and DevSecOps practices, support legacy VistA/MUMPS systems, troubleshoot performance and integration issues, and ensure federal cybersecurity and compliance.

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.

Lead a software development team to design, build, test, and deliver product features. Provide hands-on technical leadership, oversee architecture, code quality, releases, and production support. Mentor direct reports, collaborate with product and support teams, and evaluate new technologies and prototypes to improve delivery and product capability.

Design, build, and maintain scalable web applications for payroll and accounting. Collaborate with engineers and product partners, write tested code, participate in code reviews, contribute to architecture, improve CI/CD and monitoring, support production (including on-call), and communicate progress while continuously learning.

Lead architectural strategy and modernization for large-scale distributed systems. Design modular, extensible services, migrate legacy monoliths to microservices, optimize AWS infrastructure and costs, document and visualize systems, facilitate cross-functional design, mentor engineering teams, and scout emerging technologies.

Lead design, build, and scale GridUnity's cloud SaaS platform. Own end-to-end features, mentor engineers, drive architecture, improve scalability, reliability, security, and data practices while collaborating with product teams.

Design and develop low-latency, high-throughput distributed database kernels for massively parallel analytics. Responsibilities include architecture, modern C++ development, MPI/OpenMP query execution, SIMD and hardware optimization, distributed networking, database internals, in-database machine learning, vector indexing, performance tuning, code reviews, mentoring, and resolving scalability issues across large-scale clustered systems.

Design and develop low-latency, high-throughput distributed database kernels for massively parallel analytics. Responsibilities include query execution, columnar storage, transaction management, cluster coordination, hardware-aware optimization, SIMD vectorization, RDMA networking, in-database machine learning, vector indexing, performance tuning, architecture reviews, code reviews, mentoring, and resolving scalability issues.

Own and deliver server-side features end-to-end for a cloud-hosted accounting SaaS: design data models and APIs, improve performance and reliability, mentor engineers, ensure observability and on-call readiness, collaborate with product and clients, and apply AI-assisted development safely to accelerate delivery.

Design and develop scalable software solutions, lead engineering workstreams, ensure code quality, mentor junior developers, and collaborate on technical strategies to enhance digital experiences for BECU members.

Perform technical code review and analysis to determine originality and function, prepare memos and expert reports, rebut other experts, communicate with counsel and clients, prepare testifying experts, manage multiple engagements, and supervise junior staff.

Translate sketches and layouts into CAD construction drawings, prepare diagrams, special-item sketches and bills of materials, review and check detailed I&C drawings, perform site walkdowns for new and retrofit industrial installations, and support construction documentation and related duties.

Lead and manage engineers to design, build, and maintain production backend game services (sessions, matchmaking, progression). Diagnose incidents, participate in on-call, collaborate with cross-discipline teams, and produce clear technical documentation.

Improve and maintain automated build systems for a game team. Develop build software (Unreal Engine 5, primarily C#), monitor CI/CD health, provision on‑prem and cloud build resources, troubleshoot build failures, enable internal workflows, and collaborate with release and test teams to publish builds and test results.

Lead the design, development, and deployment of digital identity solutions for state governments, ensuring effective technology implementation and customer success.

Lead technical strategy and architecture for public sector digital identity solutions, ensuring technical excellence and customer success with hands-on involvement and high-level interactions.

Lead full-stack developer responsible for designing, building, and maintaining Salesforce Commerce Cloud e-commerce solutions and integrations (ERP/CRM). Mentor junior developers, provide technical leadership, troubleshoot issues, and deliver scalable, secure code while collaborating with cross-functional teams.

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

Design and optimize high-performance C++/CUDA libraries for GPU-based data processing. Improve multi-node GPU communication (UcxExchange), optimize Presto GPU query performance, and lead enhancements across Presto, Velox, and cuDF projects for efficient DataFrame and database acceleration.

The role involves developing computational models in C++. The candidate will collaborate with product owners and analysts and write unit tests, focusing on performance and design principles.

Develop and maintain legacy US commercial transactional applications to meet FERC 809 and NAESB 3.0 regulatory requirements. Work in a large-project environment using C/C++ and SQL Server, write stored procedures and SQL, and support a critical 6-month on-site contract in Houston.

The E&C Post Order Manager oversees supplier management and coordination activities to ensure timely delivery of materials and equipment, compliance with project specifications, and efficient resolution of claims and issues.

Develop and optimize ultra-low-latency, high-performance trading infrastructure in modern C++. Implement and tune order execution, market data connectivity, multi-threaded systems, and risk modules. Profile and benchmark real-time systems, collaborate with quants and traders, and maintain robust, fault-tolerant continuous trading operations.