Top Software Engineer Jobs

Owns the design, development, security, performance, and scalability of Cerby’s cross-browser Manifest V3 extension. Builds React and TypeScript experiences across extension surfaces, manages service-worker synchronization and authentication workflows, and ensures secure credential handling. Responsibilities include dependency and supply-chain security, testing, observability, code reviews, mentoring, cross-functional collaboration, and production delivery in an agile remote environment. The role also promotes responsible AI-assisted development practices.

Build and maintain Windows desktop applications in C# and .NET using WPF, WinForms, or WinUI. Develop well-defined features, integrate REST services and data stores, write automated tests, diagnose performance and production issues, and contribute to CI/CD, packaging, deployment, and code reviews. The role also involves mentoring junior developers, collaborating cross-functionally, documenting work, and supporting modernization from .NET Framework to modern .NET.

Senior software engineering individual contributor responsible for owning systems or feature areas, making customer- and business-focused technical decisions, improving an agentic AI development framework, managing automated quality and defect reduction, leading design discussions, mentoring engineers, and driving cross-pod technical initiatives. The role requires hands-on software engineering leadership without direct people management, with emphasis on AI-assisted development, testing, safety, and organizational technical strategy.

Design, develop, maintain, and support enterprise applications, backend services, RESTful APIs, integrations, and distributed systems. Own projects through design, testing, deployment, and production support. Troubleshoot complex issues, improve reliability and performance, maintain automated tests, contribute to architecture and code reviews, and enhance CI/CD pipelines. Collaborate with engineering, product, architecture, and business teams while evaluating emerging technologies and driving technical improvements.

Design and maintain backend infrastructure for card-present payment terminals, including EMV, NFC, magnetic stripe, device management, certifications, international payment support, PCI DSS security, encryption, tokenization, and reliable transaction processing. Integrate terminal SDKs and hardware platforms, build .NET and C# services, lead EMV Level 3 certification, and mentor engineers.

Develop and enhance backend systems, services, APIs, and core product features. Improve codebase maintainability, reliability, and scalability while operating mission-critical systems in production. Participate in on-call incident resolution, automated monitoring and instrumentation, recruiting, interviewing, and mentoring. The role emphasizes distributed systems, automated testing, continuous integration, and measurable business impact.

Develop and maintain enterprise web and desktop applications using the Microsoft .NET stack, including ASP.NET, C#, JavaScript, and SQL Server. Perform unit testing, troubleshooting, performance tuning, and scalable application design. Participate in Agile software development lifecycle activities, create technical documentation and models, and improve development frameworks, standards, and processes.

Lead Nexcess’s product engineering organization, owning architecture, delivery, roadmap, team structure, engineering-manager development, hiring, and production accountability. Improve delivery speed and reliability using DORA metrics, AI-assisted engineering, automated testing, observability, trunk-based development, feature flags, and incident management. Guide modernization of legacy Perl and PHP systems, billing and payment platforms, hosting products, and infrastructure migrations while partnering closely with Product and senior stakeholders.

Develop front-end interfaces for entering rates into a SQL Server backend. Collaborate with web and database developers on a critical Wells Fargo project. Responsibilities include C# and ASP.NET MVC development, Entity Framework implementation, software architecture, test-driven development, dependency injection, design patterns, JavaScript development, T-SQL, database design, and clear technical communication.

The Full Stack UI Developer will contribute to DoD Space Force projects, utilizing Java, JavaScript, React, and Python, ensuring compliance with DoD standards, optimizing applications, and managing projects using Gitlab.