React developer h1.location_city

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React developer • oakland ca

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Developer Productivity

LangChain, IncSan Francisco, CA, United States

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At LangChain, our mission is to make intelligent agents ubiquitous.We build the foundation for agent engineering in the real world, helping developers move from prototypes to.We began as widely ado...[internal_linking.show_more]

Python Developer

PRIMIS, Inc. DefunctSan Francisco, CA, United States

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Fullstack Software Engineer, AI Document Generation (Contract – 3 months).San Francisco | Onsite 5 days/week.Read the overview of this opportunity to understand what skills, including and relevant ...[internal_linking.show_more]

Senior React Web Developer*

Strategic EmploymentSan Francisco, CA, United States

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Our client, a San Francisco-based ecommerce startup led by the founder of multiple highly-successful Bay Area technology companies, is seeking a Senior Web Developer to join their rapidly growing t...[internal_linking.show_more]

WordPress and React Developer

Elegant ThemesSan Francisco, CA, US

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About Our Company ElegantThemes.WordPress Theme & Plugin Development.We have been building the top premium WordPress themes and plugins for the past 14 years and we maintain the largest customer ba...[internal_linking.show_more]

Mobile Developer (React Native): 24-02669 (No C2C)

Akraya IncSan Francisco, California, United States

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[filters_job_card.quick_apply]

React Native (Expert), Mobile Development (Proficient), AWS (Intermediate), JavaScript (Intermediate).We are seeking a Mobile Development Engineer - React Native to join the Client's Music Communit...[internal_linking.show_more]

Software Engineer, Front-end (React, Javascript)

Apero HealthSan Francisco, CA, United States

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Ex-NSA, Ex-Google Engineers Building Healthcare Payments Platform.We're an early stage startup in healthcare bringing transparency to the system, and one of the top startups from Y Combinator.We've...[internal_linking.show_more]

Senior Fullstack Engineer (Ruby / Python / React)

crewAISan Francisco, CA, United States

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We are looking for an experienced Fullstack Engineer to join our dynamic team at crewAI.You will be instrumental in advancing our crewAI+ platform, a Ruby on Rails application that heavily leverage...[internal_linking.show_more]

Developer Advocate

TelnyxSan Francisco, CA, United States

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Telnyx is an industry leader that's not just imagining the future of global connectivity-we're building it.From architecting and amplifying the reach of a private, global, multi-cloud IP network, t...[internal_linking.show_more]

Web Developer

CPJ RecruitmentSan Francisco, CA, United States

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Our goal is to provide innovative and accurate engineering solutions that improve infrastructure and promote sustainable development.Backed by a team of skilled professionals dedicated to excellenc...[internal_linking.show_more]

React JS Developer

Cynet SystemsSan Leandro, CA

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Web Content Accessibility Guidelines (WCAG) 2.SDL Tridion content management system experience.Strong expertise in working with Node JS, WebPack and other tools related to React Front End Development.[internal_linking.show_more]

Senior Software Engineer - Mobile (React Native)

BitGo, Inc.San Francisco, CA, United States

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Senior Software Engineer - Mobile (React Native).BitGo is the leading infrastructure provider of digital asset solutions, delivering custody, wallets, staking, trading, financing, and settlement se...[internal_linking.show_more]

iOS Developer

Adidev Technologies IncSan Francisco, CA, United States

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IT consulting firm delivering top-notch iOS and Android Developer solutions to industry giants including Delta, Google, Apple, Spotify, US Bank, FedEx, and more.We're not just a software consulting...[internal_linking.show_more]

. NET Developer

Arete Technologies IncSan Francisco, CA, United States

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Consulting and Outsourcing services, bridging the gap between requirements and outputs of various dexterous and facile companies worldwide.The thrust of providing global deliverables with focus on ...[internal_linking.show_more]

Senior Developer

University of California, RiversideOakland, CA, United States

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The Student Information Systems, Campus Integration Applications team is recruiting an experienced Senior Developer to lead the technical design and development of our enterprise-grade software sol...[internal_linking.show_more]

Salesforce Developer

SonSoftOakland, CA, United States

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USA based corporation duly organized under the laws of the Commonwealth of Georgia.Software Development, Software Consultancy and Information Technology Enabled Services.Build low level design for ...[internal_linking.show_more]

React

YochanaSan Leandro, CA, United States

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Unit testing with JEST / Enzyme / RTL / Jasmine / Mocha.BS/BA degree or higher in technology.HackerRank test mandatory for TP1/TP2.[internal_linking.show_more]

Software Developer

E-SolutionsSan Francisco, CA, United States

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As part of the Digital Risk Management team, you will be working in a startup-like environment.In this role, you'll serve as a senior software developer for our B2B and B2C SaaS.This is a great opp...[internal_linking.show_more]

Salesforce Developer

RIT Solutions, Inc.San Francisco, CA, United States

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Title: Salesforce Developer (Mid-level role , but they need genuine candidate, again LinkedIn recommended candidates will be the first choice).One onsite interview and that's it.Margin share $4-$5 ...[internal_linking.show_more]

iOS Developer

Syntricate TechnologiesSan Francisco, CA, United States

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BS degree in Computer Science or related field.Strong technical background and analytical abilities in Software Design, implementation and troubleshooting.OS)Experience writing Full Stack Native iO...[internal_linking.show_more]

Developer Productivity

LangChain, IncSan Francisco, CA, United States

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About LangChain

At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.

Today, LangChain, LangGraph, LangSmith, and Agent Builder are used by teams shipping real AI products across startups and large enterprises. Millions of developers trust LangChain to power AI teams at companies like Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.

With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we're at a stage where we're continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world.

About the Team:

The Infrastructure team builds and maintains the systems that power LangChain's developer platform, including LangGraph Cloud and LangSmith. The team focuses on reliability, scalability, and developer productivity across the stack, working closely with backend, frontend, and platform engineers to ensure services are deployed, tested, and operated with confidence.

About the Role:

We're hiring a Software Engineer to join the Infrastructure team and own developer productivity across our LangGraph Cloud/Platform and LangSmith products. You'll work closely with Infrastructure, Backend, and Frontend teams to ship with confidence across Kubernetes-based services, APIs, and UI flows. You'll also help pioneer quality practices specific to LLM applications, such as prompt regression testing and evaluation suites.

Location: In person 5 days/week in San Francisco, CA or New York, NY

What You'll Do:

Own test strategy end-to-end across APIs, services, UI, data, and infrastructure (Kubernetes, Terraform, Helm)
Stand up ephemeral test environments in Kubernetes for pull requests and release candidates; seed test data and run hermetic test suites
Shift quality earlier in CI/CD pipelines (GitHub Actions) through parallelization, caching, deterministic seeds, flake tracking, and quality gates
Build observability into testing workflows with rich failure artifacts such as logs, traces, and dashboards
Establish performance and reliability baselines for critical paths, including SLIs, SLOs, and regression detection
Partner on incident workflows by reproducing issues, adding targeted regression tests, and improving runbooks and postmortems
Write documentation including test plans, playbooks, and contributor guidelines for writing high-quality tests

Example projects you might own

A pull-request ephemeral end-to-end testing harness that deploys a minimal LangSmith stack in CI and runs Playwright and API suites against seeded tenants
A k6 performance scenario that simulates multi-tenant traffic and surfaces p95/p99 latency regressions per release
A flake-budget system that automatically quarantines flaky tests, opens issues with artifacts, and tracks time-to-deflake

What You'll Bring:

3+ years of experience as a software engineer or infrastructure engineer
Strong hands-on experience with Python and testing frameworks such as pytest
Experience working with CI/CD systems (GitHub Actions preferred) and improving pipeline performance and reliability
Solid understanding of API testing, mocking/stubbing, and data setup/teardown
Comfort defining quality standards, writing test plans, and driving cross-team execution

Nice to Have:

Experience with load and performance testing tools such as k6
Familiarity with observability tooling such as Datadog or OpenTelemetry
Experience testing services running on Kubernetes and containerized environments
Basic infrastructure experience with Helm, Terraform, Kubernetes networking, or secrets management
SQL fluency for validating data (Postgres, ClickHouse, BigQuery)
Familiarity with Go, Node, or React for targeted white-box tests and improving system testability

Compensation & Benefits

We offer competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance. Actual compensation will vary based on role, level, and location. For team members in the EU and UK, we provide locally competitive benefits aligned with regional norms and regulations.
Annual salary range: $160,000- $225,000 USD