Top Software Engineer Jobs in Philadelphia, PA

Own and produce developer-facing documentation for DNSid including API references (TypeScript, Python, Go), conceptual guides, integration tutorials, developer portal IA, standards/spec writing, changelogs, and CI-validated code samples. Work closely with SDK engineers and developer advocates to document features pre-release, set style and tooling, and ensure docs are machine- and AI-consumable.

As a Software Engineer III, you will design tools for automating the management of CrowdStrike's cloud infrastructure, collaborating with teams to create reliable solutions and mentoring junior members.

As a Lead Mobile Developer, you will design and maintain iOS apps, mentor developers, optimize performance, and integrate with backend services while collaborating with cross-functional teams.

The Founding Engineer will lead the development of Sailor Health's AI-powered platform, building systems for patient care and mentor the engineering team.

Lead the development of an AI-powered platform for senior mental health, building systems for patient experience, and mentoring the engineering team.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering standards.

Lead ownership and evolution of Dropbox's Windows endpoint platform (CorpFleet). Improve endpoint management, Intune workflows, security/compliance, automation, operational reliability, and cross-functional rollout. Mentor engineers and drive multi-phase platform initiatives, documentation, and runbooks to scale secure, reliable endpoint experiences.

The Staff Software Engineer will design and implement solutions for the Websites product, collaborate across teams, and innovate on a scalable web platform for restaurants.

Build and maintain core libraries and developer tooling used across the company. Lead complex projects, design and develop backend APIs and AI-assisted developer features, manage platform components (service templates, LaunchDarkly), troubleshoot production issues, conduct code reviews, influence architecture, and mentor engineers to improve developer productivity.

Design and build scalable, audit-ready backend and full-stack systems for Upstart Bank. Own technical design and delivery of medium-to-large projects, improve reliability, observability, and data consistency, and partner with product, compliance, and operations to deliver regulated fintech solutions.

Design, build, and operate scalable, distributed event-driven systems that automate accounting close and capital risk workflows. Process high-volume financial events into reliable outcomes, lead multi-quarter engineering initiatives, improve reliability and maintainability, and partner with product, analytics, and finance teams.

Lead design, development, and maintenance of scalable .NET web and Windows applications. Build RESTful APIs, integrate front-end frameworks, collaborate with cross-functional teams, drive architectural decisions, perform code reviews and testing, and support deployments and backlog reduction for the eApp portfolio.

Senior fullstack engineer to build and scale Brigit's consumer finance platform. Own end-to-end features across frontend (React/React Native/TypeScript) and backend (Java/REST/SQL), optimize database and APIs for high scale, integrate 3rd-party services, implement risk and transaction algorithms, improve CI/CD, testing, monitoring, and internal tooling to support millions of users.

Build and scale consumer-facing mobile and web applications and backend services. Own features end-to-end across frontend and backend, optimize databases and queries, integrate third-party APIs, implement algorithms for risk and transaction evaluation, improve reliability and CI/CD, and contribute to testing, monitoring, and internal tools to support customer operations.

Build and maintain frontend and backend platform components for AI infrastructure using Python and TypeScript. Support and develop the open-source SDK, create APIs and UIs, collaborate with engineering and AI teams, write tests, and follow CI best practices. Participate in code reviews, mentorship, and continuous learning to improve platform scalability and developer experience.

Lead a product engineering team to own roadmap delivery for customer-facing console, APIs, and developer workflows. Plan roadmaps, drive system architecture, ensure quality/reliability, run execution processes, hire and mentor engineers, coordinate cross-functional dependencies, and incorporate customer feedback to improve product adoption and performance.

Lead and grow a distributed datacenter storage engineering team owning end-to-end storage from NAND/NVMe to filesystems. Design and operate SAN, NFS, and parallel filesystems (VAST, Lustre), optimize performance (RDMA, GDS), ensure reliability, automation, observability, and collaborate with networking, GPU platform, SRE, and product teams.

Design and implement full‑stack, low‑latency web-based Ground Control Station and C2 systems (map-centric UIs, real-time telemetry, video streaming), lead architecture and APIs, mentor engineers, support field tests and mission deployments, and ensure interoperability with C2 standards.

Lead design and prototyping of generative AI experiences for autonomy development; drive UX for Hivemind products; perform user research, collaborate with CTO and product leads, and deliver reference implementations and integrations across full-stack web and edge systems.

Lead design and prototype of generative AI experiences to accelerate autonomy development; drive UX for Hivemind Generative AI; collaborate with CTO and Hivemind product leads; conduct user research and competitive analysis; build prototypes and reference implementations that integrate with web and mission-planning systems.