Top Software Engineer Jobs

Design, develop, integrate, test, troubleshoot, and sustain cloud-based software solutions supporting mission-critical national security services. Build and maintain microservices and containerized applications, contribute to architecture and design reviews, optimize performance and reliability, resolve system issues, and collaborate on technical approaches, timelines, and project scope.

Design, develop, test, maintain, and troubleshoot software applications and system integrations. Analyze requirements, optimize database interactions and algorithms, support testing, and maintain technical documentation. Collaborate with systems and hardware engineers, coordinate Agile/Scrum development activities, uphold coding standards, and improve development processes. The role requires an active TS/SCI clearance with a current polygraph and extensive software engineering experience.

Develop and maintain a full-stack cloud-based ELINT data product for the Intelligence community. Responsibilities include designing, developing, testing, documenting, deploying, and supporting new features and updates; collaborating with developers and DevOps teams; participating in architecture and design reviews; and ensuring data accuracy, interoperability, and fidelity for tactical users.

Develop and maintain COBOL-based Medicare claims processing software in a legacy mainframe environment. Responsibilities include designing, coding, debugging, unit testing, implementing enhancements, troubleshooting defects, supporting Agile/Scrum delivery, preparing estimates, maintaining documentation, and collaborating with team members, clients, and vendors. The role supports Durable Medical Equipment claims processing and requires adherence to structured development standards.

Develop, deploy, secure, monitor, maintain, and troubleshoot a cloud-based microservices platform supporting national security missions. Collaborate on software design, development, testing, architecture reviews, technical planning, production support, and system sustainment. The role requires expertise in cloud technologies, Kubernetes, Linux, Python, infrastructure automation, databases, AWS resource management, and software development lifecycle practices.

Join Perpay as a Software Engineering New Grad. Contribute to coding, testing, and releasing features, while learning in a supportive and collaborative environment. Ideal for candidates with internships in full-stack development interested in a mission-driven role.

Develop and maintain ecommerce software across the full software development lifecycle. Design microservices and event-driven systems, build customer-facing features, improve existing applications, troubleshoot production issues, and collaborate with architects, developers, QA, business analysts, and end users. The role requires Python or Golang, RESTful services, asynchronous processing, data modeling, web technologies, databases, testing, cloud platforms, and professional experience using AI coding agents.

Develop and maintain full-stack software supporting cyber-threat intelligence analysis. Responsibilities include designing user interfaces, application services, and data layers; troubleshooting integration issues; testing, documenting, deploying, and operating mission software; participating in code reviews and technical design; and collaborating with engineers, analysts, and mission stakeholders.

Designs, develops, tests, reviews, and maintains scalable identity and access management applications using Java and JavaScript. Collaborates on requirements, software specifications, coding standards, CI/CD workflows, bug fixes, and technical issue resolution in Agile environments. The role supports authentication infrastructure integrating identity providers, entitlement services, and downstream APIs on AWS ECS and EKS, with opportunities to use AI-assisted development tools and infrastructure-as-code practices.

Develop and maintain the 3DCS dimensional variation analysis platform across multiple modules. Responsibilities include translating requirements into technical solutions, designing C++ functionality, maintaining a long-lived codebase, testing numerical accuracy, performing corrective maintenance, supporting customers, reviewing code, and contributing to technical improvements. The role collaborates with product, application engineering, technical leadership, external partners, and globally distributed teams.

Develop, test, maintain, and productize scalable software for national security and federal research programs. Apply software engineering principles, modern programming languages, version control, CI/CD, automated testing, cloud or container technologies, and performance optimization. Troubleshoot operating systems and I/O, understand network protocols, collaborate with researchers and engineering stakeholders, communicate program status, and travel frequently to sponsor and contractor locations. The position is fully on-site in State College, Pennsylvania, with limited hybrid flexibility.

Develop, test, maintain, and productize scalable software for national-security research programs. Collaborate with engineers, researchers, principal investigators, sponsors, and stakeholders; troubleshoot operating systems and I/O issues; apply software architecture, algorithms, version control, cloud, distributed systems, and container technologies. Provide program updates, support transition efforts, and complete project tasks on schedule. The position is fully on-site in Reston, Virginia, with frequent travel to sponsor and contractor locations.

Develop, test, and productize scalable software solutions for defense and federal research programs. Responsibilities include full-lifecycle software engineering, troubleshooting, performance optimization, technical design, documentation, stakeholder collaboration, program updates, and supporting technology transition efforts. The role is fully on-site in State College, Pennsylvania, with frequent travel to sponsor and contractor locations, including trips lasting up to two weeks.

Develop and maintain scalable identity and access management applications using Java and JavaScript. Design moderately complex software components, write quality code, perform unit testing, review specifications, resolve defects, and collaborate in Agile teams. Work with identity providers, authentication flows, OIDC clients, CI/CD pipelines, GitHub workflows, AWS container platforms, and complex data models. Familiarity with AI-assisted development, Terraform, Docker, and Kubernetes is beneficial.

Develop and lead software engineering, architecture, integration, testing, modernization, and sustainment efforts for mission-critical Department of War planning and readiness applications. Analyze legacy systems, develop prototypes, document architectures, assess technical risks, support acquisition decisions, and mentor development teams. The role requires collaboration with government, military, program office, and contractor stakeholders, plus travel of up to 25%.

Design, build, test, and maintain Python applications and RESTful APIs; develop and optimize Microsoft SQL Server databases; troubleshoot production issues; collaborate with stakeholders; create documentation; mentor junior engineers; promote engineering best practices and AI-assisted tooling to improve productivity and quality.

Designs, develops, tests, and supports data-center networking features for Cisco’s 8000 platform using SONiC. Builds forwarding and services data-plane capabilities, control-plane software, and automated kernel-module validation suites. Codes primarily in C++ and Python while working with Linux, networking protocols, open networking APIs, debugging tools, and CI/CD technologies. The role contributes to large-scale distributed systems supporting AI/ML workloads and high-volume internet infrastructure.

Leads technical strategy and software architecture across Streaming Hub application teams. Oversees modernization, API standards, cloud infrastructure, CI/CD, testing, observability, resiliency, and AI-assisted engineering practices. Provides design oversight, drives technical-debt reduction, improves developer productivity and operational performance, mentors senior engineers, and partners with Engineering, Product, Architecture, and Quality Assurance teams to deliver scalable, secure, reliable software.

Build and maintain PHP/Symfony backend services and Vue 3 frontend features for an event and conference platform. Responsibilities include designing modular services, developing REST APIs and UI widgets, modeling Doctrine entities, optimizing MySQL queries, integrating third-party services, writing unit and functional tests, maintaining technical documentation, and deploying and troubleshooting production systems.

Develops command-and-control and autonomy software for uncrewed platforms and web-based interfaces. Responsibilities include software design, flight-critical development, architecture reviews, documentation, automated unit and integration testing, code maintenance, merging, and configuration management within an Agile team supporting a DoD customer. The role is conducted in-office in Huntsville, Alabama, includes less than 10% domestic travel, and requires the ability to obtain and maintain a Secret clearance.

Develop and maintain the frontend and backend of a web-based virtual development and simulation environment for DoD customers. Responsibilities include software design, full-stack development, automated unit and integration testing, configuration management, code maintenance, Agile collaboration, and potentially leading development activities. The role is performed on-site in Huntsville, Alabama and supports secure government environments.

Develops web-based command-and-control and autonomy software for uncrewed platforms supporting DoD customers. Responsibilities include software design, object-oriented development, flight-critical software practices, architecture documentation, automated unit and integration testing, configuration management, and Agile team collaboration. The role is in-office in Huntsville, Alabama, supports customer-facing system capabilities, and requires less than 10% CONUS travel.

Designs, develops, and maintains C/C++ and Python software for radar and RF data acquisition, processing, analysis, automation, embedded systems, and testing. Integrates software with laboratory and field instrumentation across Linux and Windows, supports legacy codebases, develops documentation and test plans, and collaborates with engineering and program teams. The role supports classified lab, shipboard, and field test environments for Naval Research Laboratory electronic warfare programs.

Build and expand fintech and payment systems using Go, microservices, databases, and cloud technologies. Design production APIs and tooling, diagnose customer issues, manage full release lifecycles, document systems, and mentor engineers. Collaborate with product and business teams while guiding AI agents to produce maintainable, observable, testable code that meets engineering standards. Work independently in a high-availability environment and contribute to next-generation financial products.

Build the enterprise platform for an AI creative product, including workspaces, roles and permissions, SSO, audit logs, usage-based billing, invoicing, payment integrations, and security foundations. Develop backend services and APIs for multi-tenant usage patterns alongside polished React/Next.js administration and billing experiences. Collaborate with founders, sales, and customers to convert requirements into production features while taking increasing ownership of enterprise platform surfaces.