Top Software Engineer Jobs in Philadelphia, PA

Provides technical leadership and end-to-end architecture for Xfinity Mobile systems, multi-MNO integrations, roaming services, and software platforms. Translates network, partner, and product capabilities into system designs, APIs, requirements, and operational solutions. Leads architecture reviews, resilience and observability planning, troubleshooting, technical trade-off analysis, and cross-functional collaboration across engineering, product, operations, MNO, and partner teams.

Build and ship full-stack software for CoreWeave’s internal data infrastructure and operational applications. Develop TypeScript, React, and Next.js frontends; Python services on Kubernetes; SQL queries and data models; and AI-enabled interfaces such as text-to-SQL tools, retrieval systems, and agents. Own scoped features through production, including testing and post-release fixes, while collaborating with senior engineers and internal users.

Develop and deploy full-stack software for mission-critical space systems. Responsibilities include implementing features independently, writing unit and integration tests, participating in code reviews, troubleshooting applications, building RESTful APIs and microservices, deploying to cloud platforms, using CI/CD practices, collaborating cross-functionally, and mentoring junior engineers. The role requires an active TS/SCI clearance and supports aerospace or defense missions.

Develop and support web applications and eCommerce features across the full software development lifecycle. Collaborate with product, UX, QA, and engineering teams to plan, build, test, and deploy scalable solutions. The role requires backend development using the Microsoft .NET stack and frontend development with JavaScript frameworks such as React. Responsibilities also include owning assigned work, contributing in an Agile environment, and mentoring teammates when appropriate.

Develop and enhance Android SDKs, tools, and applications supporting payment transactions and kiosk-mode devices. Design, implement, debug, and optimize complex software using Kotlin, Jetpack Compose, Coroutines, Flow, dependency injection, and large multi-module architectures. Integrate REST services, payment hardware, peripheral devices, and vendor SDKs while contributing to code reviews, technical planning, testing, and architectural decisions. The role also supports secure, PCI/EMV-compliant commerce applications.

Designs, develops, and implements automated test software and techniques for complex RF electronic assemblies, subsystems, and systems. Responsibilities include integrating hardware and software, developing test applications for FPGA and CPU-based systems, creating communications interfaces, supporting qualification and acceptance testing, troubleshooting, developing test procedures, and collaborating with engineering, operations, customers, and cross-functional teams.

Designs, develops, and delivers scalable, secure software solutions. Responsibilities include system architecture, code review, performance optimization, cloud-native development, CI/CD, automation, containerization, security compliance, monitoring, vendor integration, stakeholder collaboration, and mentoring engineers. Requires deep expertise in software development, distributed systems, cloud platforms, databases, DevOps, security, and API development.

Design, implement, and maintain embedded firmware and cloud-ready microservices/APIs. Develop embedded Linux using Yocto, integrate hardware and device drivers, improve CI/CD pipelines, mentor junior engineers, troubleshoot performance issues, and collaborate with cross-functional teams to deliver scalable, secure software for connected devices.

Develop secure, scalable software services for critical public-sector organisations within an agile delivery team. Responsibilities include researching and prototyping solutions, building and testing cloud-native applications, participating in code reviews, collaborating with customers and multidisciplinary teams, and continuously improving engineering practices.

Manages and grows a mobile software engineering team, oversees mobile application development and deployment, enforces coding and testing standards, mentors engineers, supports production systems, and coordinates with web, infrastructure, UX, and design teams. The role also manages project timelines, SLAs, technical issues, software development processes, and partnerships while contributing code and improving delivery practices.

Lead the end-to-end architecture and development of safety-critical embedded device software for energy products. Responsibilities include metering, real-time control, communications, hardware-software co-design, secure firmware updates, certification, CI/CD, testing, and production scaling. The role combines hands-on firmware development in C, C++, or Rust with technical leadership, workstream delegation, code review, and collaboration across electrical engineering and external certification organizations.

Develop and maintain BCycle software across front-end, back-end, databases, external APIs, mobile applications, and station integrations. Design scalable and reliable solutions, conduct code reviews, mentor engineers, collaborate with product and QA teams, participate in Scrum ceremonies, support deployments and on-call operations, troubleshoot production issues, and improve engineering practices and system performance.

Build and maintain Python services and APIs within a Kafka-based event streaming platform. Develop enterprise integration services, support migration from legacy systems to cloud-native platforms, write automated tests, participate in code reviews, troubleshoot defects, and document service patterns. Collaborate with product, platform, and engineering teams while developing expertise in distributed systems, Kafka topic design, schema evolution, and agentic coding tools.

Designs, develops, integrates, tests, and maintains software for a mission-critical air and missile defense system. Responsibilities include modernizing legacy applications, integrating COTS and FOSS updates, migrating capabilities to CI/CD pipelines, creating automated tests, resolving defects, participating in software integration, and collaborating with systems, cybersecurity, hardware, and integration teams in an Agile environment. This is a full-time, onsite expatriate assignment in the UAE for approximately two to three years.

Designs and executes automated software testing strategies for integrated hardware systems supporting an aircraft ISR program. Collaborates with software and systems engineering teams in an Agile environment, performs integration and testing activities, develops test cases, and communicates technical capabilities to leadership, customers, and cross-functional stakeholders. The role requires Python and Linux experience and willingness to obtain a Secret clearance.

Designs and executes automated integration and software testing for aircraft media gateway systems. Develops test plans, procedures, specifications, and schedules; integrates hardware, software, and COTS/GOTS components; analyzes test results; validates system performance; documents discrepancies; and performs regression testing. Collaborates with software, systems, program, customer, and cross-functional teams in an Agile environment.

Design, develop, and maintain scalable software applications supporting clinical trial operations and data management. Collaborate with product managers, designers, and engineers to define technical solutions, participate in code reviews, resolve complex technical issues, improve development processes, and mentor colleagues while staying current with emerging technologies.

Develop, test, debug, optimize, and support desktop, web, and client-server applications for CATV and satellite set-top box and modem testing platforms. Create technical documentation, troubleshoot hardware and software issues, configure routers, analyze test results, maintain lab systems, release products to production, and collaborate with engineering leads, subject matter experts, and customers.

Build and support file-based client data integrations, troubleshoot data flows and production issues, manage SFTP and authentication workflows, monitor recurring jobs, validate and transform structured files, automate reporting and operational tasks, and collaborate with engineering, infrastructure, security, operations, and client teams to improve reliability and service continuity.

Leads software architecture and engineering for complex classified government systems. Responsibilities include designing cloud-native distributed architectures, establishing APIs and interface standards, guiding DevOps and CI/CD adoption, governing software quality and resilience, managing technical risks, conducting customer technical exchanges, and mentoring distributed engineering teams. The role requires collaboration with government customers and subcontractors and supports mission-critical space and national security applications.

Leads interdisciplinary teams developing and deploying advanced algorithms for signal and image processing, space domain awareness, satellite communications, and signals intelligence. Responsibilities include applying data structures and algorithms, using cloud services, researching cutting-edge concepts, guiding software from prototype to operations, and preparing technical documentation. The role is on-site in King of Prussia, Pennsylvania, requires an active TS/SCI clearance, and does not offer visa sponsorship.

Develops, tests, deploys, and maintains scalable software applications across the full SDLC. Responsibilities include writing clean code, building microservices and REST APIs, creating automated tests, troubleshooting issues, optimizing performance, and collaborating with product managers, architects, and engineers in an Agile/Scrum environment. The role requires active Secret clearance and primarily onsite work in King of Prussia, Pennsylvania.

Develop and maintain scalable .NET software through the full SDLC. Responsibilities include designing applications and APIs, contributing to microservices and cloud-native architecture, implementing DevOps and CI/CD practices, building automated tests, supporting observability and incident response, applying secure coding, and collaborating in Agile teams. The role is fully onsite in Warren, Michigan, Monday through Friday.

Develop and maintain scalable .NET software through the full SDLC. Responsibilities include building REST APIs and integrations, contributing to microservices and cloud-native architecture, applying DevOps and containerization practices, creating automated tests, supporting observability and incident response, implementing secure coding practices, and collaborating in Agile/Scrum teams. The role is fully onsite in Warren, Michigan.

Develop and maintain scalable .NET software throughout the SDLC. Responsibilities include designing RESTful integrations, contributing to microservices and event-driven architecture, implementing Azure cloud solutions, applying DevOps and containerization, building automated tests, monitoring applications, practicing secure coding, and collaborating within Agile teams. The position is fully onsite in Warren, Michigan, Monday through Friday.