Top Senior C# Jobs in San Diego, CA

Lead software architecture, design, development, testing, and deployment of real-time C4ISR and simulation systems. Drive customer engagement to gather requirements, guide development, mentor team members, and support demonstrations and live flight exercises. Participate across the full software lifecycle and support integration of distributed, full-stack capabilities.

The Senior Software Engineer will lead projects for the Forms platform, designing and building features across web, mobile, and backend systems while mentoring other engineers and improving platform scalability and reliability.

Design, build, and operate cloud-native, enterprise-grade SaaS services on Azure. Lead architecture and design, develop APIs and UIs, apply AI-enabled engineering tools, ensure observability, support production incidents, and drive reliability, performance, and CI/CD improvements across teams.

As a Senior Software Engineer, you'll develop and build tools for creative projects while leading feature development and collaborating with teammates.

Lead SRE efforts for DFIN SaaS: ensure availability, performance, scalability, and automation. Implement monitoring, CI/CD, IaC, container orchestration, AI-enhanced observability, incident response, RCA, and runbook automation while collaborating across engineering teams.

As a Lead Software Engineer, you'll design and develop GenAI platforms, integrate LLMs, mentor engineers, and solve technical challenges for scalable solutions.

Design, build, and operate scalable AWS-based backend services and APIs for the Collectors Vault. Own architecture and delivery, improve performance and reliability, mentor engineers, and leverage modern AI tools to accelerate development and engineering velocity.

Lead backend and full-stack work on the Payments team, building multi-gateway integrations (Stripe, PayPal), payment APIs, and customer payment UIs. Ensure secure, compliant (PCI-DSS) payment flows, reliability, observability, and scalability across AWS/Kubernetes microservices. Partner cross-functionally to design architecture, implement settlement/reconciliation, and maintain high availability.

Design and implement significant features, analyze product and database architecture for improvements, build RESTful APIs, enhance infrastructure and CI/CD, lead code reviews, mentor junior developers, and collaborate in agile ceremonies to improve reliability and efficiency.

Senior Software Engineer responsible for developing and maintaining web applications and microservices (React, Golang). Mentor team members, lead code reviews, influence technical decisions, improve CI/CD and testing strategies (unit, E2E, performance), collaborate across teams on integrations, and promote engineering best practices and documentation.

Lead architecture and hands-on development of the end-to-end video pipeline (live ingest, transcoding, storage, playback, and developer SDKs). Mentor engineers, collaborate across mobile/web/ML/platform teams, own monitoring and on-call support, and help scale video streaming and VoD capabilities for millions of streams and clips.

Lead development of core client systems and engine-level infrastructure in Unity/C#. Diagnose and fix cross-cutting performance issues, upgrade third-party SDKs, evolve build tooling, produce design docs, scope multi-week infrastructure initiatives, mentor engineers, and drive profiling, optimization, and architecture changes to enable future features.

Design, develop, and field high-performance Ground Control Station and C2 software using C++/Qt/QML and QGroundControl. Lead architecture and technical direction, mentor engineers, define APIs/ICDs, debug integration/latency issues, support field tests, implement post-mission debrief tools, and ensure interoperability with C2 standards.

Lead design and implementation of modernized insurance underwriting and policy administration solutions. Drive cloud transformation, data-driven and secure architectures, improve risk selection and claims resolution, enhance customer experience through automation, mentor technical teams, manage client relationships, and oversee project lifecycle, budgets, and delivery quality.

Lead design and build of scalable AWS cloud-based backend services and APIs powering web and mobile customer experiences. Own end-to-end feature delivery, improve grading and authentication workflows for scale and reliability, leverage AI tools to accelerate development, and provide technical leadership and mentorship across teams.

Lead development and management of production test systems for satellite payloads and ground terminals, ensuring quality and reliability across hardware systems.

Manage and grow the Video Enablement engineering team, own core video pipeline (ingest, transcode, storage, playback), enable third-party device integrations, collaborate on video roadmap, ensure scalable resilient AWS infrastructure, mentor engineers, contribute technically when needed, and support production incidents and cross-team enablement.

Develop, calibrate, and defend steady-state and transient gas turbine performance models; analyze test and field data; build internal software, automation, and AI-accelerated tools to support design, testing, and product support across teams.

Seeking a .NET Developer with over 5 years of web development experience. Responsibilities include analyzing system requirements, assisting with UAT, and participating in meetings. Must be familiar with various technologies and work collaboratively with teams.

Develop Salesforce integrations and customized CRM solutions, improve business processes, and document code while working in a collaborative team environment.

The Senior Software Engineer will develop scalable applications, collaborating on technical designs and maintaining high standards throughout the software lifecycle.

Design, build, and maintain scalable production applications using C#/.NET on AWS. Leverage Claude for AI-assisted coding, collaborate on system design and code reviews, improve performance and reliability, and mentor engineers while operating cloud-native services.

Develop and maintain proprietary UI editor and related tools for console games. Implement features, support fonts/localization and PC development, profile and tune performance, provide technical support, and collaborate with designers, artists, and programmers to improve UI tooling and pipelines.

Lead and architect enterprise digital banking applications, manage a portfolio of teams, design secure performant solutions, improve development practices, integrate services/APIs, and collaborate with stakeholders to deliver the product roadmap.

Design, develop, and modernize desktop and web software tools using .NET, databases, and front-end frameworks. Collaborate with cross-functional teams, create technical designs and project plans, implement secure performant solutions, and mentor team members while supporting digital transformation and legacy tool upgrades.