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xAI

xAI

Palo Alto, CA
Member of Technical Staff - X Money
$180k+/yrOn-siteBackend Engineering

Software Engineer on X Money team building scalable backend microservices and full-stack features for a global payment network serving 600M+ users. Requires 2+ years in large-scale consumer apps, proficiency in Rust/Go/Python/Java, and distributed systems expertise.

Parafin

Parafin

San Francisco, CA

Staff Software Engineer, Lending Products
$265k+/yrHybrid8+ YOEBackend Engineering

Leads technical design and evolution of platforms powering lending products, partnering cross-functionally to build scalable infrastructure. Requires 8+ years backend experience, strong architecture skills, and ability to mentor engineers.

Avallon AI

Avallon AI

New York, NY

Founding Software Engineer
$150k+/yrOn-site4+ YOEBackend Engineering

Builds and owns core agent execution platform for AI systems automating insurance tasks, including tool orchestration, reliability infrastructure, evals, and developer tools. Requires 4+ years experience with TypeScript/SQL in regulated environments; NYC-based.

Oscilar

Oscilar

Brazil
Senior/Staff Backend Engineer - Java
R$394k+/yrRemote5+ YOEBackend Engineering

Build and operate scalable, low-latency Java backend services for an AI risk decisioning SaaS platform. The role requires 5+ years of backend experience, AWS expertise, distributed-systems knowledge, and experience with microservices and deployment tooling.

OpenAI

OpenAI

San Francisco, CA

Software Engineer, Foundations Retrieval
$380k+/yrOn-siteBackend Engineering

Software Engineer building and scaling retrieval infrastructure for AI models, including indexing, serving, and query execution systems. Partners with researchers to productionize embedding techniques and supports agentic workflows across OpenAI products.

Black Canyon Consulting

Black Canyon Consulting

Bethesda, MD

Mid-Level Software Developer with C++ and Javascript
No salary listedOn-site3+ YOEBackend Engineering

Develops, tests, and maintains NCBI Taxonomy software systems using C++ and JavaScript. Collaborates with scientists and bioinformaticians in a Linux/distributed environment; requires BS in CS and 3+ years experience.

Pylon

Pylon

Palo Alto, CA

Backend Engineer, API
$130k+/yrHybridBackend Engineering

Builds and maintains a production GraphQL API modeling complex, nonlinear mortgage processes. Designs event-driven systems, semantic models, and developer-friendly abstractions using TypeScript, NestJS, and Temporal.io.

Pylon

Pylon

Palo Alto, CA

Backend Engineer, Underwriting
$130k+/yrHybridBackend Engineering

Builds backend systems to automate mortgage underwriting by encoding regulatory rules into precise, AI-enhanced code. Collaborates with experts using TypeScript, NestJS, GraphQL, and custom DSLs for high-stakes lending decisions.

Pylon

Pylon

Palo Alto, CA

Backend Engineer, Integrations
$140k+/yrHybridBackend Engineering

Build and maintain integrations connecting the mortgage platform to external partners like credit bureaus, title companies, and insurance providers using TypeScript, NestJS, and diverse APIs. Own solutions end-to-end on a high-impact project requiring self-direction and versatility.

NexHealth

NexHealth

Seattle, WA
Senior Software Engineer
$165k+/yrOn-site5+ YOEBackend Engineering

Build and scale backend systems for healthcare API platform, including real-time EHR integrations, data lakes from TB to PB scale, and core infrastructure for 100x growth using Kubernetes, AWS, and PostgreSQL. Requires 5+ years experience in scalable platforms with strong systems thinking.

DuckDuckGo

DuckDuckGo

United States
Senior Backend Engineer
$179k+/yrRemote7+ YOEBackend Engineering

Leads complex backend projects using Perl, Go, and Node.js to enhance privacy-focused search and AI features. Requires 7+ years backend experience, AI tooling familiarity, strong algorithms knowledge, and mentoring skills.

Acryldata

Acryldata

Palo Alto, CA

Staff, Backend Engineer - Catalog
$225k+/yrHybrid8+ YOEBackend Engineering

Leads development of DataHub's platform framework, building scalable metadata ingestion systems, APIs, event-driven processing, schema mapping, and AI asset versioning. Requires 8+ years in distributed systems, advanced Python/API expertise, and high-scale data processing experience.

Otter

Otter

Mountain View, CA

Senior Software Engineer, Search & Recommendations
$185k+/yrOn-site5+ YOEBackend Engineering

Develops and optimizes enterprise search infrastructure using NLP, RAG, vector databases, and ranking algorithms. Requires 5+ years in search/recommendation systems, Master's in CS, expertise in Python/C++ and LLMs.

Avride

Avride

Austin, TX

Senior C++ Engineer – Simulation Infrastructure
No salary listedOn-site5+ YOEBackend Engineering

Builds high-performance C++ simulation infrastructure for autonomous driving testing, ensuring reproducibility and efficiency at scale. Requires 5+ years experience with modern C++, system optimization, and distributed environments.

Hex

Hex

San Francisco, CA
Software Engineer, Foundations
$215k+/yrRemote5+ YOEBackend Engineering

Builds and evolves core backend infrastructure including APIs, realtime transport, storage frameworks, and job orchestration systems at Hex. Requires 5+ years backend experience with TypeScript/Node.js, SQL, and shared systems expertise.

Hex

Hex

San Francisco, CA
Software Engineer, Backend (Product)
$198k+/yrRemote5+ YOEBackend Engineering

Backend-leaning product engineer building AI analytics platform features like APIs, CLI, MCP, and access control systems. Requires 5+ years experience with complex systems, enterprise integrations, and remote collaboration.

Actively AI

Actively AI

San Francisco, CA
Senior / Staff Software Engineer (AI Agents)
$180k+/yrOn-siteBackend Engineering

Builds scalable backend systems and AI agents that reason over real-time data, orchestrate workflows with human-in-the-loop, and ensure high reliability at enterprise scale. Requires deep Python expertise and experience with event-driven architectures.

Phonely

Phonely

San Francisco, CA

Senior Backend Engineer
$200k+/yrOn-site5+ YOEBackend Engineering

Builds and maintains Python-based state systems and microservices for real-time voice AI agents, integrating LLMs and ensuring high availability. Requires 5+ years Python experience with async web apps, FastAPI, AWS, and Kubernetes.

Crusoe

Crusoe

San Francisco, CA

Senior Staff Software Engineer, Storage
$240k+/yrOn-site12+ YOEBackend Engineering

Leads architectural vision and multi-year roadmap for AI-scale cloud storage systems, bridging NVMe hardware to distributed object stores. Requires 12+ years in distributed systems, systems programming in C/C++/Go/Rust, and deep storage protocol expertise.

Crusoe

Crusoe

San Francisco, CA

Staff Software Engineer, Storage
$240k+/yrOn-site12+ YOEBackend Engineering

Leads architectural vision and strategy for AI-scale cloud storage systems, bridging NVMe hardware to distributed object stores. Requires 12+ years in distributed systems, system programming in C/C++/Rust/Go, and deep storage protocol expertise.

Temporal

Temporal

United States

Senior Software Engineer, Cloud Data Storage
$176k+/yrRemote5+ YOEBackend Engineering

Designs and builds scalable distributed cloud data storage systems, ensuring durability, reliability, and performance for petabyte-scale workflow history. Requires 5+ years in distributed systems with Go/Java and AWS experience, plus technical leadership.

Anthropic

Anthropic

San Francisco, CA
Staff+ Software Engineer, Backend
$405k+/yrHybrid8+ YOEBackend Engineering

Staff backend engineer owns scalable systems for Anthropic's API, Claude.ai, and developer tools across teams like API Core and Enterprise Foundations. Requires 8+ years experience leading complex projects, distributed systems, and cross-team alignment in fast-paced AI environment.

Anterior

Anterior

New York, NY

Senior Member of Technical Staff
$230k+/yrOn-siteBackend Engineering

Senior engineer owning end-to-end problems in backend services, APIs, data pipelines, and AWS infrastructure for an AI-powered healthcare platform. Drives system design, reliability, and customer integrations with depth in scalable systems.

Fora

Fora

New York, NY

Senior/Staff Backend Engineer, Finance
$155k+/yrHybrid5+ YOEBackend Engineering

Senior/Staff Backend Engineer building and scaling advisor payment systems, including booking ingestion, commission collection, payouts, reconciliation, and fintech integrations using Python and distributed systems.

Hex

Hex

New York, NY

Software Engineer, Backend (Platform)
$198k+/yrRemote6+ YOEBackend Engineering

Builds and maintains core compute platform for code execution, SQL querying, and data processing in collaborative notebook interface. Requires 6+ years experience with Python, SQL, data systems, and performance optimization.

Cursor

Cursor

New York, NY
Software Engineer, Model Routing & Inference
No salary listedOn-siteBackend Engineering

Build the inference platform powering all AI interactions, focusing on high-throughput, low-latency distributed systems for model routing, failover, and cost/performance optimization at massive scale. Requires strong engineering fundamentals for production systems handling millions of requests.

Cursor

Cursor

San Francisco, CA
Software Engineer, Core Services
No salary listedOn-siteBackend Engineering

Builds and owns core backend services like auth, webhooks, and agent workflow infrastructure for a developer AI coding tool. Requires strong experience in scalable backend systems, reliability, and clean abstractions.

Capacity

Capacity

United States

Software Engineer III
$115k+/yrRemote5+ YOEBackend Engineering

Leads development of advanced speech recognition, NLP, and biometrics software using C++ and Golang in cloud-native Linux/Docker environments. Requires 5+ years experience with multithreaded coding, DevOps, and cloud platforms like AWS.

Pump.co

Pump.co

San Francisco, CA

Backend Engineer
$120k+/yrOn-site3+ YOEBackend Engineering

Builds and maintains backend services for AI-powered cloud cost optimization platform using Python, FastAPI, PostgreSQL, and AWS. Requires 3+ years experience, onsite in San Francisco, with Docker/Kubernetes nice-to-have.

Vannevar

Vannevar

United States

Senior Software Engineer - Agents Platform
No salary listedRemote5+ YOEBackend Engineering

Lead development of AI Agents platform, designing best practices, tooling for quality assurance, and governance solutions. Requires 5+ years in backend/infra/ML systems and experience with agent frameworks like LangGraph or Claude SDK.

Illumio

Illumio

Sunnyvale, CA

Member of Technical Staff II - Architecture
$141k+/yrOn-siteBackend Engineering

Designs and develops scalable services in Java/Python for cybersecurity platform, owning full lifecycle from requirements to production ops. Requires 3+ years distributed systems experience and cloud expertise (AWS/Azure/GCP).

Palantir

Palantir

New York, NY
Senior Backend Software Engineer - Infrastructure
No salary listedHybrid6+ YOEBackend Engineering

Builds scalable infrastructure for Palantir's Foundry platform, including distributed systems, search/indexing, and container orchestration. Requires 6+ years experience in production infrastructure, strong coding in Java/Rust/Go, and familiarity with storage/data systems.

Palantir

Palantir

New York, NY
Senior Backend Software Engineer - Application Development
No salary listedHybrid6+ YOEBackend Engineering

Builds scalable backend services, robust APIs, and distributed systems for data and AI platforms. Requires 6+ years experience in backend development, strong coding in Java/Python/Go/Rust, and understanding of data structures and system architecture.

Hinge Health

Hinge Health

Senior Software Engineer - Accounts
$158k+/yrHybrid5+ YOEBackend Engineering

Builds scalable backend systems for member accounts using Golang and gRPC microservices, focusing on security, observability, and data ingestion. Collaborates cross-functionally to deliver performant APIs, mentor juniors, and integrate AI in a healthcare-regulated environment.

Nourish

Nourish

New York, NY

Senior Backend Engineer
No salary listedHybrid5+ YOEBackend Engineering

Senior Backend Engineer owns major codebase sections, designs and ships high-performance features using TypeScript, Node.js, Prisma, PostgreSQL, and AWS. Requires 5+ years backend experience, bachelor's/master's in CS/engineering, and collaborative problem-solving in a startup environment.

Customer.io

Customer.io

Americas
Senior Software Engineer, Backend
$150k+/yrRemote7+ YOEBackend Engineering

Build and scale distributed backend systems in Go for high-volume customer communications. Requires 7+ years experience with Go or similar, cloud environments like AWS/GCP, MySQL, and production observability.

Mercury

Mercury

San Francisco, CA
Staff Software Engineer - Fraud
$239k+/yrRemote7+ YOEBackend Engineering

Leads architecture and delivery of backend systems for fraud prevention, partnering with ML teams to productionize models and enable real-time decisioning. Requires 7+ years backend experience, ideally with Haskell, and strong technical leadership in fintech/risk domains.

FlexAI

FlexAI

San Jose, CA

Software Engineer, New Grad
No salary listedOn-siteBackend Engineering

New grad software engineer building reliable AI infrastructure products, APIs, and scalable features. Requires BS/MS in CS, strong coding in Python/Go/Java/JS, algorithms knowledge, and internship experience.

Databricks

Databricks

Mountain View, CA
Senior Staff Software Engineer - Lakeflow Pipelines Datasets
$229k+/yrOn-site10+ YOEBackend Engineering

Leads technical architecture and engineering for Lakeflow Pipelines Datasets platform, owning long-term direction for declarative pipelines, materialized views, and data infrastructure at exabyte scale. Requires 10+ years in large-scale distributed systems with deep expertise in databases, storage, or streaming.

Clickhouse

Clickhouse

United States

Senior Backend Engineer - ClickStack
No salary listedRemote5+ YOEBackend Engineering

Build high-performance backend services, APIs, and data pipelines for a petabyte-scale, open-source observability platform. The role requires 5+ years of backend engineering experience, strong TypeScript and Node.js skills, and expertise in distributed systems.

Clickhouse

Clickhouse

United States

Senior Backend Engineer - ClickStack
No salary listedRemote5+ YOEBackend Engineering

Build high-performance backend services, APIs, and data pipelines for a petabyte-scale open-source observability platform. The role requires 5+ years of backend engineering experience, strong TypeScript and Node.js skills, and familiarity with distributed systems and containerized environments.

Clickhouse

Clickhouse

United States

Senior Backend Engineer - ClickStack
No salary listedRemote5+ YOEBackend Engineering

Build high-performance backend services, APIs, and data pipelines for a petabyte-scale open-source observability platform. The role requires 5+ years of backend software engineering experience, strong TypeScript and Node.js skills, and knowledge of distributed systems and containerized environments.

Clickhouse

Clickhouse

United States

Senior Backend Engineer - ClickStack
No salary listedRemote5+ YOEBackend Engineering

Build high-performance backend services, APIs, and data pipelines for a petabyte-scale open-source observability platform. The role requires 5+ years of backend engineering experience, strong TypeScript and Node.js skills, and familiarity with distributed systems and containerized environments.

Clickhouse

Clickhouse

United States

Senior Backend Engineer - ClickStack
No salary listedRemote5+ YOEBackend Engineering

Build high-performance backend services, APIs, and data pipelines for a petabyte-scale open-source observability platform. The role requires 5+ years of backend experience, strong TypeScript and Node.js skills, and expertise in scalable distributed systems.

SmithRx

SmithRx

United States

Staff Software Engineer, Platform
No salary listedRemote8+ YOEBackend Engineering

Designs and develops scalable back-end architecture for product features using Golang, GraphQL, SQL, and AWS services. Requires 8-12 years experience with server-side apps, APIs, databases, plus expertise in compiled languages and mentoring juniors.

SmithRx

SmithRx

United States

Senior Software Engineer, Applications
No salary listedRemote5+ YOEBackend Engineering

Designs, develops, and maintains back-end architecture for product features using Golang, GraphQL, Node, and AWS services. Requires 5-8 years experience, expertise in relational databases like PostgreSQL, API design, and cloud/DevOps tools; mentors juniors and integrates AI technologies.

Everlaw

Everlaw

Oakland, CA

Senior Software Engineer, Database Systems
$173k+/yrHybrid5+ YOEBackend Engineering

Designs and builds scalable database systems including sharding, replication, performance optimizations, and observability tooling for high-availability data infrastructure. Requires 5+ years software engineering with 3+ years database expertise in RDBMS like Postgres/MySQL and cloud environments.

Morpho

Morpho

Paris, France

Staff Backend Engineer
No salary listedRemote8+ YOEBackend Engineering

Build and own reliable backend APIs and data pipelines powering Morpho’s consumer-facing financial products. The role requires extensive TypeScript/Node.js experience, GraphQL and PostgreSQL expertise, production-scale operations, and strong ownership in an evolving Web3 environment.

Stripe

Stripe

United States

Software Engineer, Secrets Infrastructure
No salary listedRemote5+ YOEBackend Engineering

Builds and maintains TLS identity and secrets infrastructure critical to all Stripe services, using primarily Go. Designs integrations for Kubernetes/EC2, ensures high availability, and guides teams on security architecture. Requires 5+ years software experience, strong Go skills, and security/infra background.

Trexquant

Trexquant

Gurugram, India

Infrastructure Engineer
No salary listedOn-site2+ YOEBackend Engineering

Build and optimize low-latency, high-throughput C++ and Python infrastructure for quantitative research, trading, simulation, and market-data systems. The role requires at least two years of modern C++ experience, strong Linux systems knowledge, and familiarity with real-time environments.