Top Software Engineer Jobs

Build and operate highly scalable Go backend services and data infrastructure for the AT Protocol ecosystem. Scale systems to support hundreds of millions of users, hundreds of millions of events, petabytes of NVMe storage, thousands of CPU cores, and tens of terabytes of RAM. Responsibilities include developing mission-critical services, managing production operations, and working with databases, distributed systems, operating systems, networking, and storage technologies.

Own and deliver a product surface end-to-end within PayZen's provider and partner platform. Build reliable, AI-native features in a compliance-regulated environment (HIPAA/PCI-DSS/SOC 2), identify gaps, write clear stakeholder-facing documentation, mentor junior engineers, participate in hiring, and automate shared tooling.

Build and lead architecture for ServiceTitan’s AI-native developer platform, including coding-agent runtimes, orchestration layers, harnesses, build systems, CI/CD, developer portals, safety guardrails, and compliance infrastructure. Deliver production-scale platform projects autonomously, influence engineering direction across teams, anticipate long-term technology needs, establish reusable engineering patterns, and mentor senior engineers.

Own customer implementations of a voice AI platform from pre-sales through production. Responsibilities include translating customer workflows into engineering solutions, building demos, developing system integrations, deploying AI agents, debugging edge cases, improving performance, and incorporating customer feedback into product improvements. The role combines software development, customer engagement, technical problem-solving, and product collaboration.

Leads a small Mission Systems software team while contributing at least 50% hands-on technical work. Owns architecture, development, integration, testing, and deployment of fire control and mission software connecting sensors, command systems, operators, and interceptor platforms. Responsibilities include distributed real-time systems, networking, Linux deployment, security, simulation, integration testing, technical leadership, configuration control, and customer or partner integration for air defense capabilities.

Build and scale secure backend microservices for payments, disbursements, and governance, risk, and compliance workflows. Design distributed systems capable of handling millions of daily requests using Google Cloud and modern infrastructure tools. Collaborate with product, operations, and compliance teams, mentor junior engineers, and improve platform capabilities through analytics and user feedback. The role requires strong software engineering fundamentals, REST API experience, fintech or financial systems knowledge, and familiarity with event-driven and hexagonal architectures.

Own and architect large-scale backend systems powering Anthropic’s API, Claude products, and enterprise platforms. Lead complex projects, make scalability and reliability decisions, collaborate across engineering, product, research, and commercial teams, and remain hands-on with code and AI models. Potential areas include platform serving, developer experience, agentic systems, identity, enterprise foundations, safety, and cloud-native distribution.

Lead the Product Growth engineering function, setting technical direction and managing full-stack engineers building user-facing experiences that improve discovery, activation, engagement, retention, and adoption. Partner with Product, Design, Data Science, Marketing, and Applied AI; establish experimentation and measurement practices; contribute to architecture and code; own initiatives end to end; and hire, coach, and develop the team.

Develop and debug high-performance C applications on multicore Linux systems for ultra-low-latency electronic trading infrastructure. Lead software design and delivery, address complex engineering challenges, define testing strategies, mentor engineers, improve development practices, and collaborate directly with customers. The role requires expertise in concurrency, multithreading, socket programming, TCP, and Linux application development, with full-time onsite work in Needham, Massachusetts.

Develop and operate full-stack SaaS applications, owning technical design, architecture, testing, security, observability, deployment, and incident response. The role includes database optimization, authentication, microservices, Kubernetes-based CI/CD, technical debt management, and on-call support. The developer will mentor engineers, collaborate with product and design teams, evaluate technologies, translate customer needs into solutions, and lead delivery of secure, reliable client-facing applications.