Backend Engineer

• Design, build, and operate APIs and backend services that bring frontier model capabilities to developers
• Partner with Research, Safety, Codex, and API teams to define API behavior and deliver safe, staged launches
• Build API capabilities for agent workflows, including task delegation, context sharing, and parallel execution
• Strengthen long-running request reliability across timeouts, cancellation, streaming, and background execution
• Improve request-processing performance and tail latency through profiling, efficient systems code, and persistent connections
• Turn developer feedback and production failures into better observability, diagnostics, and lasting product improvements

Backend engineer building reliable Responses API services for OpenAI’s AI products

Software Engineer, API Frontiers

Backend engineer building reliable Responses API services for OpenAI’s AI research and deployment products. Designing agent workflows, improving latency, and operating distributed backend systems.

• Own backend services moving institutional clients from application to first trade, including Unified Business Onboarding, KYC Refresh, and provisioning
• Drive onboarding automation through automated screening, risk scoring, and auto-provisioning
• Lead design and implementation of Organizations Service as the source of truth for institutional client data
• Partner with Product, Compliance, Onboarding Ops, Identity, and Prime product teams on onboarding and access controls
• Shape the access-control stack, including roles, permissions, policies, and consensus
• Mentor engineers and raise technical standards through design reviews, incident response, and operational excellence

Senior backend engineer building Coinbase Institutional onboarding and access-control services

Senior Software Engineer, Backend

Senior backend engineer building Coinbase Institutional services for client onboarding, provisioning, and access control. Improving automated screening and enabling institutional clients to operate independently on Prime.

• Design, code, test, and troubleshoot programs using appropriate hardware, database, and programming technology
• Maintain and modify existing programs, implementing approved changes
• Develop simple applications
• Test and develop programming modifications to enhance functionality
• Write new program code following prescribed specifications
• Write and maintain programming documentation
• Evaluate interrelationships between programs and identify potential unwanted effects of changes
• Analyze program performance and correct deficiencies in consultation with users and supervisor approval
• Confer with users to understand needed program changes and resolve questions about program intent, data input, output requirements, and internal checks and controls
• Conduct or support low- to moderate-level data analysis and research for management decision-making
• Maintain confidentiality of processed, stored, or accessed information
• Perform other duties as assigned

Business Programmer II developing C#/.NET applications for Unum’s employee-benefits insurance business

Business Programmer II – C#/.NET

Business Programmer II developing and maintaining C#/.NET applications for Unum’s employee-benefits insurance business. Supporting APIs, databases, cloud infrastructure, program analysis, and documentation.

• Design, build, and maintain core services and infrastructure that drive Roadie’s logistics platform
• Identify and address performance bottlenecks, ensuring reliability and scalability
• Collaborate closely with Product, Data Science, and other engineering teams to deliver impactful features
• Contribute to code reviews, technical discussions, and the improvement of engineering best practices
• Take ownership of projects from concept to production, balancing speed and quality
• Stay up to date with new technologies and bring forward ideas to improve systems
• Design and build systems powering large-scale logistics solutions
• Evolve Roadie’s platform architecture to meet scalability and performance needs

Senior Backend Software Engineer building scalable logistics systems for Roadie, a delivery platform.

Senior Software Engineer – Backend

Senior Backend Software Engineer building scalable logistics systems for Roadie, a UPS delivery platform. Designing services, infrastructure, and architecture for reliability and performance.

• Own core backend systems and infrastructure powering critical product workflows
• Ship impactful, end-to-end features improving student and teacher experiences
• Help set and evolve technical direction and translate business goals into pragmatic technical plans
• Improve code quality, observability, CI/CD, and developer tooling
• Address performance, scalability, security, reliability, and incident response
• Partner with product managers and designers on UX, interaction design, and execution
• Participate in prototyping, testing, rollout, and ongoing support
• Provide technical leadership through design discussions, code reviews, and mentorship
• Work from the New York City or San Francisco office in person four days per week; Wednesdays are work from home

Senior backend engineer building AI-powered education infrastructure at Kira Learning

Senior Software Engineer, Backend, Infrastructure Focus

Senior backend engineer building scalable infrastructure for Kira Learning’s AI-powered education platform. Owning backend systems, reliability, developer tooling, and end-to-end product delivery.

• Collaborate across Agile teams to design, develop, test, implement, and support technical solutions
• Work with developers experienced in machine learning, distributed microservices, and full-stack systems
• Use Java, Scala, Python, open-source RDBMS and NoSQL databases, Redshift, Snowflake, and cloud-based data warehousing services
• Stay current with technology trends, experiment with and learn new technologies, participate in technology communities, and mentor engineering community members
• Collaborate with digital product managers to deliver robust cloud-based solutions supporting customer experiences
• Perform unit tests and conduct code reviews to ensure rigorously designed, elegant, and performant code
• Build scalable omnichannel messaging platforms delivering hyper-personalized experiences through owned and paid Adtech channels

Lead Data Engineer building cloud data and GenAI platforms for Capital One’s personalized marketing systems

Lead Data Engineer, Python, AWS, SQL, GenAI

Lead Data Engineer building Python, AWS, SQL, and GenAI-powered data platforms for Capital One’s personalized marketing systems. Delivering scalable omnichannel messaging and customer experiences.

• Build systems around consumer IAM for Reddit’s engineering organization and millions of daily users
• Design, build, and ship backend services powering Reddit experiences
• Work with product management, security, client engineering, and backend teams to define and implement Reddit’s IAM vision and roadmap
• Select, scope, and execute high-leverage projects aligned with Reddit’s goals
• Execute strategy and create more performant, scalable, and higher-quality IAM architecture
• Collaborate with cross-functional teams across Reddit Engineering
• Learn and improve technical and non-technical abilities

Backend Engineer building scalable IAM systems for Reddit’s online communities

Backend Engineer, IAM

Backend Engineer building scalable identity, authentication, and authorization systems for Reddit’s online communities. Designing backend services and IAM architecture with cross-functional engineering teams.

• Define the technical strategy and lead the engineering team in building modern, scalable, open-source solutions
• Coordinate across delivery teams and guide architecture and implementation
• Ensure systems meet business needs, technical standards, and long-term maintainability goals
• Collaborate with the product team, government stakeholders, and other contractors to build new systems and improve existing systems
• Lead and manage engineers, providing coaching, feedback, and professional-growth support
• Define the technical vision and architectural roadmap with clients and the delivery team
• Build technical alignment across clients, stakeholders, and vendor partners
• Act as liaison between developers, executives, and non-technical stakeholders
• Make architectural decisions balancing long-term program goals with short-term delivery needs
• Oversee technical delivery, managing risks, dependencies, and trade-offs
• Establish and enforce best practices in code quality, testing, security, and documentation
• Identify and mitigate technical risks with cross-functional product teams
• Guide planning, estimation, prioritization, trade-offs, technical debt, and project milestones

Tech Lead architecting secure civic technology systems for government agencies at Nava PBC

Senior/Principal Software Engineer, Python

Tech Lead leading engineering teams building scalable, open-source systems for government agencies. Defining architecture, technical strategy, and delivery practices at Nava PBC.

• Design, build, deploy, and maintain scalable platform capabilities for enterprise AI, machine learning, LLM, RAG, and agentic AI applications
• Create reusable reference architectures, infrastructure patterns, deployment templates, integration components, and engineering standards
• Build secure integrations with the Anthropic API, Claude models, enterprise data, APIs, workflow systems, and authorized tools
• Establish CI/CD, LLMOps, MLOps, versioning, testing, release-management, rollback, monitoring, evaluation, and lifecycle-management practices
• Support production AI services through incident response, troubleshooting, root-cause analysis, capacity planning, and service-level monitoring
• Design and manage cloud infrastructure across AWS, Microsoft Azure, Google Cloud Platform, or client-approved environments
• Implement infrastructure as code, containerized deployments, identity and access controls, security, privacy, logging, auditing, vulnerability management, disaster recovery, and business continuity
• Build secure data-ingestion, transformation, indexing, retrieval, RAG, vector-search, and enterprise data-integration pipelines
• Implement responsible AI safeguards, observability, tracing, output validation, source attribution, approval gates, and human-in-the-loop workflows
• Build integrations between AI platforms, ServiceNow, enterprise APIs, identity providers, workflow tools, collaboration platforms, and line-of-business systems
• Provide technical guidance and collaborate with AI Architects, AI/ML Engineers, Data Engineers, Product Engineering, ServiceNow developers, consultants, and client technology teams
• Contribute to playbooks, runbooks, reference architectures, technical documentation, reusable modules, demos, architecture reviews, and customer workshops
• Productionize Claude-powered and other enterprise AI solutions for secure, scalable, observable, governed use

AI Platform Engineer building secure Claude-powered enterprise AI platforms for NewRocket’s ServiceNow clients

AI Platform Architect

AI Platform Engineer building secure, scalable Claude-powered enterprise AI platforms. Enabling RAG, agentic workflows, ServiceNow integrations, and governed production deployments for enterprise clients.

• Design, develop, and maintain client-facing and internal APIs
• Architect and orchestrate data flows across back end services, applications, and third-party systems
• Design and manage database schemas and data storage solutions for scalable applications
• Lead complex product features from concept through deployment
• Develop and maintain automated testing frameworks
• Contribute to software quality and reliability
• Evaluate, integrate, and support third-party services, tools, and platforms
• Improve system architecture, performance, observability, security, and reliability
• Provide technical guidance, mentorship, and knowledge sharing across the engineering team
• Own complex product features from design through deployment
• Contribute to architecture, data flows, APIs, databases, observability, and platform reliability

Senior Back End Engineer building scalable insurance technology services for Quanata

Senior Back End Engineer

Senior Back End Engineer building scalable APIs, data systems, and infrastructure for Quanata’s context-based insurance platform. Leading complex features and mentoring engineers.

• Design, develop, and maintain client-facing and internal APIs supporting product and business functionality
• Architect and orchestrate data flows across back end services, applications, and third-party systems
• Design and manage database schemas and data storage solutions for scalable applications
• Lead the design, development, and delivery of complex product features from concept through deployment
• Develop and maintain automated testing frameworks and contribute to software quality and reliability
• Evaluate, integrate, and support third-party services, tools, and platforms
• Improve system architecture, performance, observability, security, and reliability
• Provide technical guidance, mentorship, and knowledge sharing across the engineering team
• Own complex product features from design through deployment
• Contribute to architecture, data flows, APIs, databases, observability, and platform reliability

Senior Back End Engineer building scalable APIs, data systems, and infrastructure for Quanata’s context-based insurance platform. Improving reliability, security, observability, and engineering practices.

• Design, develop, maintain, and continuously improve a large-scale production application
• Establish technical direction, engineering standards, and development best practices with the Technical Lead
• Design, develop, enhance, and maintain microservices and RESTful APIs using C# and .NET
• Develop and support cloud-native applications in AWS GovCloud
• Build scalable, resilient, highly available services processing millions of messages per month
• Develop and support event-driven and asynchronous solutions using RabbitMQ and AWS SQS
• Design and optimize PostgreSQL data access and persistence solutions on AWS RDS
• Deploy, troubleshoot, and maintain containerized applications using Docker, Kubernetes, and Rancher
• Support machine learning capabilities within the microservices architecture
• Use AI-assisted development tools, code-generation technologies, AI agents, and AI frameworks
• Review AI-generated code for architecture, security, maintainability, performance, and coding standards
• Perform code reviews, mentor developers, and establish engineering best practices
• Maintain code quality and security through automated scanning and static analysis, including SonarQube
• Manage source code and CI/CD workflows using Azure DevOps
• Diagnose and resolve performance, scalability, reliability, messaging, database, and integration issues
• Partner with operations and engineering teams to monitor production health and availability
• Support releases, deployments, troubleshooting, and incident resolution
• Participate in occasional after-hours support for releases and critical incidents
• Improve architecture, performance, resiliency, observability, automation, and developer productivity
• Participate in Agile planning, estimation, design reviews, and continuous improvement

Senior .NET Developer modernizing AWS GovCloud applications for Federal Government missions

Senior .NET Developer

Senior .NET Developer building resilient microservices and APIs in AWS GovCloud. Supporting NetImpact’s digital transformation solutions for the Federal Government.

• Develop and deliver high-quality software solutions
• Mentor junior team members and contribute to continuous learning and improvement
• Engage in full-stack development spanning backend systems and user interfaces
• Build solutions using Java, JavaScript, TypeScript, RESTful API integrations, microservices, and event-driven architecture
• Collaborate with product managers, UX designers, and QA engineers to bring features and products to market
• Participate in agile development processes
• Analyze complex technical problems and propose effective solutions
• Identify improvement opportunities and optimize systems for performance and reliability
• Maintain code quality, security, and best practices
• Conduct code reviews and contribute to coding standards
• Monitor industry trends and emerging technologies
• Contribute innovative ideas to the company’s technological roadmap

Senior Backend Engineer building scalable fintech software for FIS financial platforms

Senior Backend Engineer

Senior Backend Engineer building scalable Java-based software for FIS financial platforms. Developing APIs and microservices while collaborating across product, UX, and QA teams.

• Design and lead development of core backend services, REST and GraphQL APIs, and service-to-service integrations
• Connect all layers of CenterWell's AI product stack
• Establish authentication, authorization, rate limiting, PHI access control, and audit logging patterns
• Embed HIPAA compliance into platform design
• Define and implement reusable AI and LLM integration patterns, including LLM routing, streaming responses, tool orchestration, and model output handling
• Build logging, monitoring, and alerting infrastructure for scalable, debuggable operations
• Contribute to end-to-end product feature development using TypeScript and Next.js, from server-side APIs to rendered UI
• Drive architecture reviews and define backend engineering standards
• Support care teams and patients across hundreds of CenterWell clinics through the platform
• Work remotely with occasional travel to Humana offices for training or meetings

Lead backend-focused full-stack engineer building AI healthcare platforms for CenterWell clinics

Lead Full-Stack Engineer – Backend Focus

Lead backend-focused full-stack engineer building secure AI APIs and platform services for CenterWell healthcare clinics. Driving HIPAA-compliant architecture, observability, and end-to-end TypeScript/Next.js features.

• Design and lead development of core backend services, REST and GraphQL APIs, and service-to-service integrations connecting CenterWell’s AI product stack
• Establish authentication, authorization, rate-limiting, PHI access-control, and audit-logging patterns
• Embed HIPAA compliance into platform design
• Define and implement reusable AI integration patterns, including LLM routing, streaming responses, tool orchestration, and model output handling
• Build logging, monitoring, and alerting infrastructure for scalable, debuggable operations
• Contribute to end-to-end product feature development using TypeScript and Next.js, from server-side APIs to rendered UI
• Drive architecture reviews and define backend engineering standards
• Perform software engineering activities across database, backend, and frontend layers
• Support platforms serving care teams and patients across CenterWell clinics

Senior AI full-stack engineer building secure backend platforms for Humana’s healthcare services

Senior AI Full Stack Engineer – Backend Focus

Senior AI full-stack engineer building secure APIs and platform services for Humana’s CenterWell healthcare operations. Integrating LLM capabilities while supporting care teams and patients.

• Define end-to-end architecture solutions aligned with business and technology objectives
• Develop architecture roadmaps, technology strategies, and transformation plans
• Design scalable, secure, and high-performing enterprise solutions
• Evaluate and recommend technologies, frameworks, and tools based on business requirements
• Lead architecture design for applications, integrations, data platforms, cloud solutions, and digital ecosystems
• Create architecture artifacts, solution blueprints, and technical specifications
• Define integration patterns, data flows, and system interactions
• Ensure architecture standards, best practices, and design principles are followed
• Provide technical leadership and guidance to development and engineering teams
• Review solution designs and ensure adherence to architectural standards
• Drive design reviews, architecture governance, and technical decision-making
• Mentor architects, developers, and technical consultants
• Collaborate with business leaders and stakeholders to understand strategic objectives
• Translate business requirements into technology solutions
• Present architecture recommendations and technical roadmaps to leadership teams
• Act as a trusted advisor for technology and architecture decisions
• Lead cloud adoption and modernization initiatives
• Define environments, deployment strategies, and scalability requirements
• Ensure solution reliability, availability, and performance optimization
• Support DevOps, automation, and continuous delivery initiatives
• Ensure architectures align with security, compliance, and governance standards
• Identify and mitigate technical risks
• Establish architecture review processes and governance frameworks
• Support regulatory and enterprise compliance requirements
• Partner with project teams throughout the project lifecycle
• Support estimation, planning, and resource allocation activities
• Resolve complex technical challenges and implementation issues
• Ensure successful solution delivery and business adoption
• Promote and enforce awareness of key information security practices
• Identify, assess, and report security risks affecting information assets
• Evaluate data storage, processing, and transmission for privacy and protection compliance
• Integrate data protection measures throughout the information lifecycle

Lead Architect designing secure, scalable enterprise AI and cloud solutions for Bounteous

Lead Platform Architect

Lead Architect defining enterprise architecture, cloud modernization, and secure technology strategies for Bounteous, a global AI Services firm. Guiding teams toward scalable, high-performing business solutions.

• Deliver complete solutions across all phases of the Software Development Lifecycle, including design, implementation, testing, delivery, and operations
• Advise immediate management on project-level issues
• Guide junior engineers
• Operate with little day-to-day supervision
• Make technical decisions based on internal conventions and industry best practices
• Apply technical best practices to project decisions

Senior Python Software Engineer building SDLC solutions for PayPal's global payments platform

Senior Software Engineer – Python

Senior Python Software Engineer delivering backend solutions across PayPal's global payments platform. Advising management, guiding junior engineers, and supporting full SDLC execution.

• Lead delivery of scalable, secure software solutions through collaborative engineering teams
• Own scoped feature and model delivery aligned with platform and system objectives
• Write clean, efficient, and reliable code across multiple languages
• Manage the full software development lifecycle, including design, implementation, testing, CI/CD, automated testing, and ongoing support
• Integrate AI and ML components and generative AI tools
• Participate in solution design and evaluate trade-offs
• Conduct code reviews, debugging, and defect management
• Collaborate cross-functionally to translate business needs into technical requirements and measurable outcomes
• Monitor application performance and support continuous improvement through proactive testing and observability
• Deliver high-throughput, low-latency services, APIs, and AI/ML components at scale

Senior Backend Software Engineer building Walmart’s high-scale retail technology systems

Senior Backend Software Engineer building scalable, low-latency services for Walmart’s retail platform. Delivering APIs, AI/ML components, and item-search technology at massive scale.

• Own capacity, durability, availability, and performance for network volumes, local NVMe, and S3-compatible object storage
• Tune device and filesystem configuration, caching, read-ahead, replication, erasure coding, and client-side mount behavior
• Diagnose complex performance problems end to end
• Lead capacity expansions, hardware refreshes, migrations, and rebalances without customer-visible disruption
• Design and tune high-throughput storage network paths, including MTU, jumbo frames, congestion and flow control, multipath, and NIC/offload configuration
• Optimize RDMA/RoCE and high-speed IB/Ethernet fabrics for storage traffic
• Collaborate with network engineering on topology, oversubscription, and cross-region data movement
• Write production code in Go, Python, or similar for control-plane services, provisioning, data movement, and monitoring
• Build and extend control-plane, S3-compatible, CSI, Kubernetes, vendor, and cloud-provider APIs
• Automate manual storage operations and manage infrastructure as code
• Participate in code review, testing, and CI
• Instrument the fleet for IOPS, throughput, latency, errors, retries, utilization, and per-tenant consumption
• Build dashboards, SLOs, and alerts
• Participate in storage on-call rotations and lead blameless post-incident follow-through
• Help determine distributed storage systems, data tiering and placement, network tuning, and petabyte-scale purchasing and deployment

Senior Storage Engineer scaling Runpod’s AI developer cloud storage platform

HPC Storage Engineer

Senior Storage Engineer scaling distributed storage for Runpod’s AI developer cloud. Optimizing performance, reliability, automation, and networking for AI workloads.

• Plan, design, and execute aspects of energy storage projects
• Explore subject areas and define project scope
• Provide engineering oversight and consulting across cross-functional teams
• Support the design phase and engineer major components for large-scale energy storage projects
• Identify inconsistencies in engineering drawings and take corrective action
• Identify and resolve errors in engineering studies and suggest future solutions
• Prepare technical scopes of work for contracts
• Support projects from inception to completion with project managers
• Influence project teams on engineering tasks
• Track project progress and technical issues
• Manage project milestones and identify risks
• Collaborate with suppliers to integrate major equipment
• Understand permitting requirements, propose solutions to legal challenges, and recommend site design improvements
• Travel 25% of the time for project-specific responsibilities
• Report to the onsite manager

Energy Storage Engineer designing large-scale storage projects for Westinghouse staffing services

Energy Storage Engineer

Energy Storage Engineer planning and designing large-scale battery storage projects for Westinghouse staffing services. Supporting engineering, permitting, suppliers, milestones, and project delivery.

Backend Engineer jobs in United States

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Software Engineer, API Frontiers

Senior Software Engineer, Backend

Business Programmer II – C#/.NET

Senior Software Engineer – Backend

Senior Software Engineer, Backend, Infrastructure Focus

Lead Data Engineer, Python, AWS, SQL, GenAI

Backend Engineer, IAM

Senior/Principal Software Engineer, Python

AI Platform Architect

Senior Back End Engineer

Senior Back End Engineer

Senior .NET Developer

Senior Backend Engineer

Lead Full-Stack Engineer – Backend Focus

Senior AI Full Stack Engineer – Backend Focus

Lead Platform Architect

Senior Software Engineer – Python

Senior Software Engineer – Backend

HPC Storage Engineer

Energy Storage Engineer