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AngelList

Senior Software Engineer, Accounting

AngelListNew York, NY +1

Builds scalable accounting infrastructure and models financial workflows for venture fund management, ensuring data integrity and audit-ready outputs. Requires 5+ years backend experience with Ruby on Rails, React, relational DBs, and finance domain knowledge.

Salary not listed
Hybrid5+ YOEBackend Engineering
LangChain

Python OSS Engineer

LangChainCambridge, MA +2

Maintains and improves the core Python LangChain and LangGraph packages, enhances documentation, resolves community issues, and builds example AI applications. Requires 5+ years in software engineering or applied ML, strong communication, and ownership mindset.

160k – 225k/yr
On-site5+ YOEBackend Engineering
Grepr

Backend Engineer

GreprSan Francisco, CA

Owns backend for real-time stream processing app, builds scalable Java/Dropwizard services on Kubernetes/AWS, delivers RESTful APIs, and ensures uptime collaborating with frontend and customers. Requires distributed systems, stream processors, and modern Java web app experience.

130k – 160k/yr
HybridBackend Engineering
Unto Labs

Systems Engineer

Unto LabsSan Francisco, CA

Designs and builds high-performance blockchain subsystems in C, focusing on cryptography, consensus, networking, and low-level hardware optimization on commodity hardware.

180k – 250k/yr
On-siteBackend Engineering
Collate

Full-Stack Software Engineer (Backend-Leaning)

CollateSan Francisco, CA

Build backend-heavy full-stack systems, APIs, data pipelines, and end-to-end features using Go, TypeScript/React, and AWS/Kubernetes. Collaborate with product/design/AI teams, own production systems including on-call, with emphasis on scalability and user experience.

Salary not listed
On-siteBackend Engineering
Extend

Staff Software Engineer

ExtendNew York, NY

Builds scalable systems for document processing using LLMs and AI/ML, designs novel human-AI interfaces, and owns end-to-end projects in a high-growth startup. Requires 7+ years experience deploying production AI systems with high agency.

250k – 300k/yr
On-site7+ YOEBackend Engineering
OpenAI

Software Engineer, Compute - Storage

OpenAISan Francisco, CA +1

Build and operate storage infrastructure powering OpenAI's research and production, including object stores, cross-region data movement, lifecycle management, and federation layers on Kubernetes using Rust.

230k – 385k/yr
HybridBackend Engineering
Closinglock

Senior Backend Engineer

ClosinglockAustin, TX

Senior Backend Engineer designs, develops, and maintains scalable web applications using Python frameworks like Flask, FastAPI, or Django. Requires 4+ years experience with RESTful APIs, relational databases, AWS, Docker, and CI/CD pipelines.

Salary not listed
On-site4+ YOEBackend Engineering
Retell AI

Senior Software Engineer, Backend

Retell AIRedwood City, CA

Builds scalable backend systems for AI voice platform handling millions of calls, focusing on prompt orchestration, telephony integrations, and DevOps workflows. Requires 2+ years backend experience with CS fundamentals, concurrency, and distributed systems.

200k – 300k/yr
On-site2+ YOEBackend Engineering
Alluxio

Senior Software Engineer

AlluxioFoster City, CA

Senior Software Engineer designs and optimizes distributed systems for Alluxio's data orchestration platform, focusing on caching, metadata management, I/O performance, and fault-tolerance in multi-cloud environments. Requires strong experience in Java/C++/Go and distributed storage technologies like Spark, Hadoop, and Kubernetes.

Salary not listed
HybridBackend Engineering
Runpod

Senior Software Engineer

RunpodUnited States

Senior Software Engineer building and scaling cloud infrastructure for AI/ML workloads on distributed systems across global data centers. Requires 3+ years experience with strong Go skills; distributed systems, containerization, and ML deployment experience preferred.

150k – 200k/yr
Remote5+ YOEBackend Engineering
Finch

Staff Software Engineer, Backend

FinchSan Francisco, CA +1

Leads design, build, and maintenance of backend services for high-volume data processing and employment system integrations. Requires 10+ years backend experience, strong system design, NodeJS/PostgreSQL/Redis expertise, and leadership in ambiguous, high-growth environments.

Salary not listed
Hybrid10+ YOEBackend Engineering
Letta

Software Engineer, Agent Platform

LettaSan Francisco, CA

Builds scalable backend services, APIs, and OSS framework for production AI agent systems. Requires strong Python expertise, service architecture, SQL databases, and AI tooling familiarity; in-person in San Francisco.

Salary not listed
On-siteBackend Engineering
Complete

Senior/Staff Backend Engineer

CompleteSan Francisco, CA

Builds and scales backend systems for compensation platform, owning business lines end-to-end. Works autonomously on enterprise challenges like authorization, security, and observability using Python/Django and GraphQL.

Salary not listed
On-siteBackend Engineering
Flex

Senior Software Engineer, Backend

FlexUnited States

Senior backend engineer owning large domains in card processing, ledgering, and financial services. Architects scalable services, mentors team, and drives end-to-end projects with 4+ years experience in Node.js/TypeScript and cloud platforms.

150k – 220k/yr
Remote4+ YOEBackend Engineering
Zoox

Senior/Staff Software Engineer - Behavior Capabilities

ZooxFoster City, CA

As a Senior/Staff Software Engineer on the Fail Operational Planning team, you will develop behavioral and motion planning algorithms to improve robot operation and customer experience. This role involves creating algorithmic improvements, collaborating cross-functionally, and architecting scalable solutions.

242k – 349k/yr
Hybrid7+ YOEBackend Engineering
Elicit

AI Engineer

ElicitOakland, CA

Builds backend systems integrating LLMs for AI research tools like living documents, focusing on prompting, model management, scalability, and fault-tolerance. Requires strong backend skills in Node/Python/K8s and enthusiasm for language models.

Salary not listed
HybridBackend Engineering
Alluxio

Staff Software Engineer

AlluxioFoster City, CA

Staff Software Engineer designs and implements core components of Alluxio's distributed data orchestration platform, optimizing caching, metadata, and I/O for large-scale AI/ML workloads across multi-cloud environments. Requires strong distributed systems expertise in Java/C++/Go and technical leadership.

Salary not listed
HybridBackend Engineering
OpenAI

Software Engineer, Collective Communication

OpenAISan Francisco, CA

Designs and implements custom networking collectives using C++ and CUDA for efficient AI model training on supercomputers. Requires expertise in low-level performance-critical software, RDMA distributed algorithms, and GPU/CPU code.

380k – 555k/yr
HybridBackend Engineering
Harmony Intelligence

Blockchain Engineer

Harmony IntelligencePalo Alto, CA

Develops secure, scalable blockchain systems, operates large node networks, and optimizes high-throughput performance. Requires CS bachelor's, 5-10 years experience including startups, and kernel/data structures expertise.

Salary not listed
On-site5+ YOEBackend Engineering
Palantir

Backend Software Engineer - Application Development

PalantirNew York, NY

Builds scalable backend services, robust APIs, and distributed systems for data and AI platforms. Collaborates cross-functionally to optimize performance and user workflows, requiring strong coding in Java, Python, Rust, or Go and backend expertise.

Salary not listed
HybridBackend Engineering
Palantir

Backend Software Engineer - Infrastructure, Foundations

PalantirNew York, NY

Builds performant, scalable infrastructure including distributed systems, search/indexing, and container orchestration for Palantir's Foundry and Gotham platforms. Requires strong coding in backend languages like Java/Rust/Go and familiarity with data processing/storage systems.

Salary not listed
HybridBackend Engineering
Svix

Rust Backend Engineer

SvixSan Francisco, CA

Build performant backend services in Rust for scalable message delivery at high availability. Focus on rapid deployment of production code and exceptional developer experience in a fast-paced startup environment.

130k – 180k/yr
On-siteBackend Engineering
Lightning Labs

Assets Protocol Engineer (Remote)

Lightning LabsPalo Alto, CA

Designs and implements core features of the Taproot Assets Protocol on Bitcoin, contributes to Go-based cryptocurrency daemons, and collaborates on protocol evolution. Requires strong Bitcoin protocol knowledge, distributed systems expertise, and Go programming experience.

Salary not listed
RemoteBackend Engineering
Finch

Senior Software Engineer, Backend

FinchSan Francisco, CA +1

Builds and maintains scalable backend services and APIs for data integrations in a high-growth startup. Leads cross-team product initiatives with 7+ years of backend experience, strong system design, and NodeJS/PostgreSQL expertise.

180k – 215k/yr
Hybrid7+ YOEBackend Engineering
Cape

Software Engineer

CapeNew York, NY +1

Builds secure, privacy-focused telecommunications infrastructure including signaling firewalls, fake base-station detection, and anti-spam systems. Requires 4+ years backend experience with Golang/Rust/Java/Python, distributed systems, and strong CS fundamentals.

175k – 230k/yr
Hybrid4+ YOEBackend Engineering
Ambience Healthcare

Staff Software Engineer, Product

Ambience HealthcareSan Francisco, CA

Designs, builds, and maintains core AI platform infrastructure for healthcare providers, focusing on observability, reliability, and scalability. Leads major technical initiatives end-to-end with 5+ years experience in distributed systems and modern stacks.

250k – 300k/yr
Hybrid5+ YOEBackend Engineering
Secureframe

Staff Software Engineer

SecureframeNew York, NY

Lead technical design, implementation, and architecture for compliance automation platform. Requires 8+ years backend experience including 6+ years with Ruby, strong CS fundamentals, and experience building public APIs.

220k – 320k/yr
On-site8+ YOEBackend Engineering
Revefi

Senior Backend Engineer - Seattle, WA

RevefiSeattle, WA

Build and scale backend services for a cloud-native SaaS platform focused on data reliability and cost optimization. Requires 3-9 years experience in backend development with Java/C++/Python/Golang and expertise in distributed systems and cloud technologies.

Salary not listed
Hybrid3+ YOEBackend Engineering
Sound.xyz

Staff Software Engineer, Backend

Sound.xyzNew York, NY

Leads technical direction and architecture for backend systems supporting music economy platform with web3 features like NFTs and blockchain data pipelines. Requires 6+ years experience, North American timezones, and individual contributions to scalable infrastructure.

Salary not listed
Remote6+ YOEBackend Engineering
Runway

Member of Technical Staff, Backend Engineer, API

RunwayUnited States

Builds and scales backend APIs handling millions of users, focusing on TypeScript services, async workflows, database optimization, and AWS infrastructure for AI platform reliability.

240k – 290k/yr
RemoteBackend Engineering
Hive

Staff Software Engineer - Backend

HiveSeattle, WA +1

Builds and improves scalable backend systems including REST APIs, microservices, data processing, and distributed task systems. Requires 8+ years experience with highly-available systems, Bachelor's in CS, and strong communication skills.

Salary not listed
On-site8+ YOEBackend Engineering
Hive

Software Engineer - Backend

HiveSeattle, WA

Builds and maintains scalable backend systems including REST APIs, microservices, data processing, and distributed task systems using Node.js. Requires Bachelor's degree, experience with web apps, distributed systems, and Postgres; emphasizes code quality, security, and best practices.

Salary not listed
On-site2+ YOEBackend Engineering
Hive

Senior Software Engineer - Backend

HiveSeattle, WA +1

Builds and maintains scalable backend systems including REST APIs, microservices, data processing, and distributed task systems. Requires 5+ years experience, Node.js proficiency, distributed systems design, and Postgres expertise.

Salary not listed
On-site5+ YOEBackend Engineering
Lightning Labs

Lightning Protocol Engineer (Remote)

Lightning LabsPalo Alto, CA

Designs and implements core Lightning Network protocols and algorithms for Bitcoin's layer-2 scaling. Contributes to Go-based peer-to-peer cryptocurrency daemons, conducts research, and engages with open source community. Requires strong systems engineering with distributed systems and crypto expertise.

Salary not listed
RemoteBackend Engineering
Hive

Senior Software Engineer - Backend

HiveSan Francisco, CA +1

Builds and maintains scalable backend systems including REST APIs, microservices, data processing, and distributed task systems. Requires 5+ years experience with Node.js, Postgres, distributed systems, and strong engineering practices.

Salary not listed
On-site5+ YOEBackend Engineering
Hive

Staff Software Engineer - Backend

HiveSan Francisco, CA

Designs and builds scalable backend systems including REST APIs, microservices, and data processing pipelines. Requires 8+ years experience with distributed systems, Bachelor's in CS, and strong security practices.

Salary not listed
On-site8+ YOEBackend Engineering
Supermove

Software Engineer, Backend & Integrations (Remote)

SupermoveUnited States

Build scalable backend systems, integrate with 3rd party services like payments and CRMs, and optimize GraphQL performance for a moving industry platform. Requires 2-5 years experience with Python/Flask, GraphQL, PostgreSQL, and AWS.

Salary not listed
Remote2+ YOEBackend Engineering
Confluera

Software Engineer (Backend)

ConflueraPalo Alto, CA

Build scalable distributed systems and APIs for cybersecurity data processing and anomaly detection. Requires Java/Python proficiency, Kafka/Spark familiarity, and distributed systems experience.

Salary not listed
On-siteBackend Engineering
dYdX

Senior Software Engineer - Backend

dYdXNew York, NY

Build high-performance backend systems for decentralized finance trading platform, including order matching engines, APIs, and blockchain integrations. Requires 5+ years experience with TypeScript, Node.js, databases, and strong CS fundamentals.

210k – 270k/yr
Hybrid5+ YOEBackend Engineering
dYdX

Software Engineer - Backend

dYdXNew York, NY

Build low-latency backend systems for high-volume crypto trading, including order matching engines, blockchain protocol code, and APIs. Requires 2+ years experience, strong coding skills, and Bachelor's in CS or related.

180k – 240k/yr
Hybrid2+ YOEBackend Engineering
Hive

Software Engineer - Backend

HiveSan Francisco, CA

Builds and maintains scalable backend systems including REST APIs, microservices, and data processing pipelines using Node.js. Requires a few years of web app experience, distributed systems knowledge, and a CS bachelor's degree.

Salary not listed
On-site2+ YOEBackend Engineering
Metabase

Software Engineer (Backend)

MetabaseUnited States

Builds and ships major backend features in Clojure and JavaScript/TypeScript, tackling complex issues. Requires Clojure experience or eagerness to learn, proven track record with complex products, and strong CS fundamentals.

Salary not listed
RemoteBackend Engineering