Top Senior Software Engineer Jobs in Philadelphia, PA

Lead the design and architecture of software systems, mentor developers, and develop scalable applications using C#, React, and Azure. Emphasizes CI/CD and AI tools.

Lead the implementation of scalable features, develop technical requirements, collaborate across teams, and enhance product offerings at Perpay.

The Senior Software Engineer will focus on frontend technology, implement features, mentor engineers, and ensure quality user experiences, primarily using React.

Collaborate with hardware and software engineering to develop and maintain traffic sensor systems, improve operations, and enhance security and performance.

The Senior Software Developer will create and maintain server-side software, collaborate in Agile projects, and ensure system operational support.

Build and evolve scalable software for digital pathology and medical imaging. Responsibilities include developing TypeScript and Vue applications, backend services, APIs, microservices, cloud-native infrastructure, automated tests, and CI/CD pipelines. The role contributes to architecture, observability, performance, developer productivity, and AI-assisted engineering workflows. Collaboration occurs across Agile/Scrum teams, with opportunities to improve engineering standards and deliver reliable healthcare software.

Provide technical leadership and hands-on development for the Nexity platform. Lead distributed engineering teams, establish architecture and coding standards, run Agile delivery, mentor engineers, drive secure, scalable cloud-based solutions using Azure/.NET and modern web stacks, leverage AI-assisted development tools, and collaborate with product, architecture, QA, and infrastructure to meet business objectives.

Lead a software development team as the senior technical authority: design architecture, enforce coding standards, deliver code, manage timelines, mentor developers, coordinate cross-team work, ensure production readiness, CI/CD, observability, security/compliance, and foster continuous improvement.

Design, develop, test, and implement navigation software and algorithms for sensitive navigation sensors. Collaborate with interdisciplinary teams, perform numerical analysis and optimization, deploy software in POSIX and real-time environments, and support lab and field/at-sea testing. Lead responsibilities and documentation expected for higher-level appointments.

Designs, researches, and implements complex cross-system software; translates customer requirements into solutions; develops and optimizes data models and storage; mentors junior engineers; performs code reviews, TDD, and complex bug fixes; operates in Agile/Waterfall environments and promotes development best practices.

Design, develop, and maintain complex cross-system software; translate user requirements into solutions; implement best practices and development processes; resolve complex technical issues; mentor and train junior engineers; design complex data models and complete difficult bug fixes; participate in specifications, code reviews, and collaborate across teams in various development environments.

The Senior Software Engineer develops software for surgical navigation products, leading projects and ensuring solutions are efficient and scalable.

Design and develop software for medical devices, collaborate with product and UI/UX teams, and ensure project adherence to quality standards.

The Senior Software Engineer leads software development for surgical navigation products, develops prototypes, ensures performance and scalability, and works with a cross-functional engineering team using agile methodologies.

The Senior Software Engineer will develop medical image processing algorithms, manage project timelines, and ensure compliance with medical software standards while collaborating in a team environment.

Design, develop, and maintain embedded firmware for optical networking products. Implement new features, resolve legacy bugs, collaborate with hardware, validation, and test teams, and ensure accurate firmware documentation. Coach junior engineers, lead code reviews, support pre/post sales and field engineers, and apply Agile/CI/CD/DevOps practices for product delivery.

Lead end-to-end delivery of web projects: discovery, architecture, implementation, deployment, and post-launch support. Act as technical lead and client contact, write front- and back-end code, perform reviews, mentor engineers, use AI-assisted workflows, manage scope/timelines, and identify risks early.

Lead design and implementation of cloud-native, event-driven logistics systems. Provide technical leadership, architect AWS services, own IaC, design APIs and EDI integrations, mentor engineers, and ensure scalable, real-time processing to support growth.

Classic automation test engineer responsible for building and configuring automated test infrastructure within sprints. Requires coding (Java or Python), strong familiarity with Gherkin/Cucumber, front-end or back-end automation, performance/load testing, and tools like Selenium, Appium, TestNG/JUnit and Spring. Role is roughly 60% coding and 40% test automation setup. 12+ month contract; good communication skills required.

Design and develop custom software solutions across multiple systems and collaborate with teams to ensure success in complex projects.

The Principal Engineer leads software development for optical networking products, mentors junior engineers, and supports pre and post-sales interactions. Requires expertise in embedded systems, C/C++, and networking protocols.

The Senior Backend Engineer at Perpay will design RESTful APIs, improve backend system reliability, and lead technical projects while mentoring team members. Collaboration with product stakeholders is essential for effective backend solutions.

Lead system verification for optical networking products: define test strategy, design test plans, automate Python-based regression and CI/CD pipelines, validate northbound interfaces (Netconf/gRPC/CLI/SNMP/REST) and DWDM/OTN features, run regression and sanity tests, produce release reports, and mentor junior verification engineers while collaborating with HW/SW and architecture teams.

The Senior Software Engineer will design, develop, and implement software solutions for law enforcement, leading projects and mentoring junior engineers in a collaborative Agile Scrum environment.

The Sr. Software Engineer will develop and test applications using .NET and SQL, collaborate with teams, ensure quality practices, and maintain technical documentation. They will contribute to software design and process improvements while adapting to changing environments in payment systems.