Top Senior Backend Engineer Jobs in San Francisco, CA

Leads architecture, development, and operation of Python-based AWS backend and IoT cloud services. Designs Lambda microservices, REST APIs, event-driven workflows, telemetry pipelines, data models, and AWS IoT Core integrations. Provides hands-on technical leadership through coding, design and code reviews, mentoring, planning, and standards development. Ensures security, scalability, observability, CI/CD, production readiness, incident response, and cross-functional alignment across firmware, mobile, QA, DevOps, Product, and Security teams.

Lead backend engineering for AI platform components, designing scalable services for enterprise and on-premises deployments. Own systems from architecture through production release, guide and develop engineers, manage priorities, and support customer rollouts. The role requires Python and TypeScript expertise, container orchestration and packaging experience, end-to-end product delivery, people leadership, and a computer science or related STEM degree.

Develop scalable Django back-end applications and RESTful APIs; design databases, schemas, ER diagrams, data flows, authentication, and authorization systems. Configure cloud infrastructure and production deployments, optimize PostgreSQL performance, write automated tests, and manage Linux servers with Bash, SSH, and shell scripting. Collaborate with cross-functional teams, document systems, and contribute to scalable architecture. This is a remote, unpaid internship requiring at least 30 hours weekly.

Own backend features from inception through production, develop and improve Kotlin services, write maintainable and well-tested code, and design scalable, reliable distributed systems within a small cross-functional team.

Build and scale backend infrastructure for AI-driven freight finance workflows, including document processing, APIs, data pipelines, audit engines, integrations, observability, and performance monitoring. Collaborate with AI/ML teams to productionize model outputs, integrate freight and financial systems, improve engineering practices, and make frontend updates as needed in a remote-first startup environment.

Build and operate backend services and APIs for secure, multi-tenant administration workflows, including user access, account hierarchies, settings, roles, access controls, and audit logs. Own features from design through production support, applying strong data modeling, authorization, testing, observability, and reliability practices. Collaborate with Product and engineering teams, investigate production issues, document systems, and mentor teammates.

Build and maintain backend application features, APIs, integrations, data models, background jobs, and production systems. Improve performance, reliability, monitoring, recovery, and infrastructure across AWS and Terraform. Collaborate with product and frontend engineers, review code, mentor teammates, investigate incidents, and support safe releases and operational excellence.

Design, develop, test, and maintain backend services and APIs for secure fintech and crypto products. Work with Azure for deployment and scalability, optimize systems for large data volumes, resolve defects, contribute to architecture and code reviews, and apply secure software development practices. Collaborate with distributed Engineering and Product teams while building payment and transfer infrastructure.

Lead the architecture, design, development, and deployment of scalable backend systems for Scout Motors’ digital products. Build identity, access, and profile services supporting web, mobile, and vehicle applications; collaborate with cross-functional stakeholders; ensure reliability, testing, documentation, and 24/7 service ownership. Mentor engineers, evaluate emerging technologies, and deliver complex technical initiatives in a collaborative environment.

Design, build, and operate a cloud-native, real-time, highly available backend platform for data-center and grid integrations. Implement time-series storage, streaming/event processing, APIs, CI/CD, containerized deployments, and production observability while ensuring safe continuous deployment and cross-disciplinary collaboration.

Build and scale secure, reliable backend services and web applications for a fintech wealth management platform. Responsibilities include identity and access management, AWS infrastructure, database optimization, API and distributed-systems hardening, production reliability, observability, incident response, and security remediation. The role independently delivers solutions from design through production, mentors engineers, and partners with security leadership. This is a hybrid position requiring three office days weekly in San Francisco.

Build and operate backend services, APIs, data models, and asynchronous workflows supporting accounting, reconciliation, and financial data synchronization. Ensure transaction data is accurate, traceable, reliable, and resilient across systems. Own complex projects from design through production, collaborate with product and engineering partners, investigate cross-service issues, and improve system reliability. Contribute through design reviews, code reviews, mentorship, and thoughtful technical decision-making.

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.

Design and implement an LLVM-based backend JIT compiler for NVIDIA GPUs. Develop compiler passes and optimizations, focusing on high performance and low compile time. Collaborate with hardware, compiler, and application teams to resolve issues and influence future GPU architectures.

Build and lead development of high-availability backend services for Affirm’s card loan platform. Design scalable APIs, data models, microservices, and event-driven systems supporting real-time loan attribution, approvals, origination, and refunds. Drive technical strategy, troubleshoot complex performance issues, collaborate with cross-functional teams, and mentor engineers while ensuring long-term system robustness and scalability.

Designs, develops, and supports scalable Java microservices using Spring Boot and Google Cloud. Responsibilities include SQL and data pipeline development, CI/CD automation with Jenkins, infrastructure as code using Terraform, unit testing, code reviews, production incident resolution, root-cause analysis, agile execution, and mentoring engineering teams.

Build and operate backend services and asynchronous workflows that provision customer accounts, assets, and product entitlements. Own projects from design through production support, ensuring reliable retries, idempotency, observability, testing, and recovery from failures. Collaborate with licensing, Product, administration, partner, and customer-facing teams to improve onboarding and activation paths. Investigate operational issues, address root causes, document systems, and contribute to code reviews and technical problem solving.

The Senior Software Engineer will design, build, and operate backend services, ensuring system reliability and performance while collaborating with others in a high-growth environment.

Design and own backend infrastructure for a privacy-first AI memory platform. Responsibilities include multi-tier memory storage, secure multi-tenant isolation, real-time APIs, caching, LLM integrations, retrieval systems, synchronization, monitoring, deployment pipelines, and production reliability. The role requires close collaboration with ML engineering and product teams while owning architecture, infrastructure, testing, security, and operational troubleshooting.

Leads architecture, development, and operation of Python-based AWS backend and IoT services. Designs Lambda microservices, REST APIs, event-driven workflows, telemetry pipelines, databases, device communication, and infrastructure as code. Provides hands-on technical leadership through coding, design and code reviews, mentoring, cross-functional planning, security practices, testing, CI/CD, monitoring, incident response, and roadmap development.

Architect, build, and operate large-scale relational and distributed SQL database infrastructure. Responsibilities include database control-plane automation, provisioning, failover, backups, upgrades, zero-downtime migrations, Kubernetes networking, connection proxy optimization, reliability monitoring, capacity planning, and operational support. The role also leads technical delivery, mentors engineers, establishes quality standards, collaborates cross-functionally, and contributes to team roadmap and on-call operations.

Build and operate production-grade Python backend services, APIs, distributed systems, data pipelines, and agentic workflows for an AI observability platform. Own ambiguous projects from prototyping through architecture, testing, deployment, and ongoing operation. Collaborate with product, machine learning, and infrastructure teams, while contributing React front ends when needed. The role requires strong backend depth, distributed-systems expertise, cloud experience, and end-to-end product ownership.

Design and build scalable backend services and APIs for a real estate software platform. Develop clean, maintainable Java code on AWS, collaborate with frontend, design, and product teams, and solve performance and scaling challenges. The role requires strong problem-solving skills, debugging ability, data structures and algorithms knowledge, startup experience, and comfort using AI-assisted coding tools.

Develop and maintain Ruby on Rails backend systems supporting solar development, value evaluation, and loan servicing. Responsibilities include writing and reviewing code, maintaining CI/CD pipelines, solving complex domain problems, collaborating with Product and company experts, shaping architecture and technical direction, and improving engineering processes as the company scales.

Design and scale production-grade asynchronous backend systems in Python, including REST/WebSocket APIs, multi-agent LLM workflows, provider-agnostic integrations, and RAG pipelines. Build schemas and migrations, optimize relational databases, instrument services, and own CI/CD from testing through deployment. Establish AI governance around code review, provenance, licensing, security, compliance, and customer data. Drive architecture and product ideas from conception through production.