Senior Fullstack Engineer, AI Observability & Evals
Candidate
LangChain is seeking a Senior Fullstack Engineer for LangSmith to shape the technical direction of our observability and evals platform, collaborating with enterprise customers and internal stakeholders. You will own critical features across Go, Python, and TypeScript and mentor teammates. The role emphasizes API design, scalable architectures, and delivering high-quality, maintainable code in a fast-paced environment. Salary and equity reflect seniority in a US-based product team. #J-18808-Ljbffr Candidate
$180k - $240k
...foundation for agent engineering in the real world, helping... ...to production-ready AI agents that teams can... ...includes LangSmith (Observability, Evaluation,... ...We're looking for a Senior Fullstack Engineer for our commercial... ...an observability and evals platform. In this role...SeniorWork at officeFlexible hours- LangChain, Inc. in San Francisco is seeking a Senior Fullstack Engineer for LangSmith, our observability and evals platform. You will shape the technical direction across Go, Python and Typescript, and work closely with enterprise customers and internal teams. You should...Senior
$175k - $240k
...build the foundation for agent engineering in the real world, helping... ...to production-ready AI agents that teams can rely on... ...product for LLM application observability, testing, and debugging. What... ...and browsers Collaborate with fullstack and backend developers and UX...SeniorWork at officeFlexible hours$175k - $240k
LangChain in San Francisco, CA is seeking an experienced frontend engineer to advance LangSmith, our enterprise platform for LLM observability, testing, and debugging. You will build user-facing features with React and TypeScript, translate designs into high-quality code...Senior$145k - $217k
...ambition by building products rooted in AI, automation, and intelligent customer... ...a human connection.We’re seeking a Senior Fullstack Engineer to help build Solve — an AI-powered... .... Maintain high quality via testing, observability, and performance improvements across...SeniorFull timeRemote work- ...building Worthy builds AI-enabled reasoning... ...To solve this, Worthy engineers data pipelines to detect... ...know when they're unsure, evals to catch regressions before... .... Reliability, observability, and deployment safety... ...good fit looks like Senior-level full-stack experience...SeniorWork at officeLocal areaFlexible hours3 days per week
$130k - $196.5k
...innovators. As consumers embrace new AI-driven experiences, the LiveRamp data... ...DescriptionLiveRamp is looking for a Senior Software Engineer to help shape the next generation of Data... ...partner integrations.Improve reliability, observability, performance, and operational...SeniorWorldwide- ...Our client is building AI coworkers for IT teams: a security... ...- and systems-heavy founding engineering role where \"full-stack\" means... ...execution (validation, evals, release gates); build isolated... ...agents (reproducible state, observability, resource controls, safe teardown...SeniorFull timeH1bWork at officeVisa sponsorshipMonday to Friday
- ...Inflection Point And We’re Looking For Senior Or Staff Engineers To Help Scale Us To a $XXM+ In ARR.... ...our authorization, customizability, observability, security, and so on. Tech stack We... ...At An All-time High And We Love Our AI Tooling (e.g. Claude Code, ChatGPT, Cursor...SeniorWork at office
$228k - $363k
...entertainment company and the leader in AI music. We are backed by... ...make the song. We're hiring Senior / Staff Full-Stack / AI Engineers to build the backend, data and evals behind it, working alongside... ...language: services at scale, observability and on-call ownership. ~...SeniorFull timeWork at officeLocal area$206.55k - $280.8k
...move at the speed of life. Engineering at Gametime Join a team where... ...re also investing heavily in AI. From internal engineering tools... ...Opportunity We\'re hiring Senior and Staff Full Stack... ...Improve system performance, observability, and developer productivity....SeniorFlexible hours$220k - $280k
# Senior Fullstack EngineerFull-timeSan Francisco, CA · Hybrid$220,000–$280,000/yr## About the role###... ...RoleKunya is building an all-in-one AI platform: chat, images, video, voice,... ...We’re looking for a **Senior Fullstack Engineer** who can build fast, think clearly, and...SeniorRemote work$150k - $205k
...a living asset that helps people and AI agents do their best work.We're growing... ...people do work.About the roleAs a Senior Fullstack Engineer, you'll own a product area end to end... ...practices: code review, test coverage and observability.Ship features end to end, from...SeniorFull timeTemporary workWork at officeHome officeFlexible hours$141.9k - $190.3k
...is a global organization of engineers, product developers, designers... ...Disney+, ESPN, and others.As a Senior Full Stack Software Engineer... ...and to manage risk.Use AI tools responsibly to improve... ...latency microservices.Enhance observability with metrics, monitoring, and...SeniorWork experience placementWork at office$148.5k - $223.9k
...SalesforceSalesforce is the #1 AI CRM, where humans with agents... ...Salesforce.Job Description: Senior Member of Technical Staff (... ...On-SiteRole Level: Software Engineering Senior MTSTeam: Infrastructure... ...segments receive the same level of observability and reliability as our public...SeniorFull time- ...SoLo Funds SoLo Funds is a full-stack, AI-powered community banking platform,... ...the Role SoLo Funds is building the engineering function of the future: one engineer, operating... ...). Track record building CI/CD, observability, or evaluation systems for code or agent...SeniorRemote work
$159.2k - $301.6k
...the next generation agentic AI platform working with a research... ...like a startup founding engineer while having the resources of... ...Reliability: Contribute to monitoring, observability, and evaluation frameworks... ...grasp of latency, cost, evals, and fallbacks in production...SeniorFull timeTemporary workLocal areaWorldwide$130k - $180k
...San Francisco, CA).About the RoleWe're seeking a Senior Full Stack Engineer to join our remotely distributed AI full stack team, someone who builds with quality... ....Proven track record designing and owning observability/alerting for critical systems.Mastery in building...SeniorH1bWork at officeImmediate startRemote workFlexible hours- ...combines software, data, and service into a seamlessly integrated, AI-driven platform that simplifies these complex reimbursement... ...reimbursement journey. About the Role We're hiring a Senior Fullstack Engineer to join Pivotal's Case Execution team. This team owns...SeniorRemote workFlexible hours
- ...com addresses.About the Financial AI Product TeamRippling’s Financial... ...speed, confidence, and accuracy.As a Senior Software Engineer on this team, you will help... ...inconsistent provider formats.Develop evals, testing harnesses, observability, and feedback loops to measure AI...SeniorWork at office3 days per week
$210k - $240k
...a customer, from enterprise organizations to teams of engineers to individual developers working with AI agents, this team plays a central role in defining and evolving those experiences. We’re looking for a Senior Engineer who is excited to build and improve product journeys...SeniorFull timeWork at officeFlexible hours3 days per week$175k - $230k
A leading technology company in San Francisco is seeking a Senior Fullstack Engineer to join their innovative team. You will work in a hybrid model, focusing on building cutting-edge user interfaces and contributing to a dynamic engineering culture. Candidates should have...Senior- Commure is building an AI Operating System for healthcare, enabling ambient AI, AI-driven billing automation, and clinical intelligence across 60+ EHRs. Join a fast-moving team delivering real impact in patient care and healthcare operations. You will contribute to real...Senior
- ...instantly accessible. By combining AI, robotics, and the world’s largest continually... .... The Role We are seeking a Senior Full Stack Software Engineer to build the software that turns... ...definitions into reliable, observable robotic execution. Work closely with...Senior
$180k - $230k
# Senior Software Engineer, Backend (Agentic AI)SiftSan Francisco, CA (Hybrid)Full-time$180,000 – $230,000 / yearAI... ...agent evaluations and production observability for quality, latency, cost, and failures... ...loops, context management, and evals• Designed tool ecosystems for...SeniorPermanent employmentFull timeRemote work$2,000 per month
...type: FULL TIMEPosted: 2026-10-16Amplitude is the leading AI analytics platform, helping over 5,200 customers—including... ..., and put our customers at the center of everything we do.Senior Fullstack Software Engineer , Enterprise Foundationhybrid- San Francisco, California or...SeniorHome office- A software development company is seeking a Mid-Senior Software Engineer - Backend/Fullstack to work from their San Francisco HQ. The role involves building and scaling their core AI product, particularly focusing on Python backend systems. Ideal candidates have 5+ years...SeniorFull time
$266k
...the organization by applying cutting-edge AI models to real-world challenges,... ...organization. From customer operations to engineering, we develop an ecosystem of automation products... ...heavy domains to help to design and build an evals infrastructure that measures the quality...InternshipWork at officeLocal areaFlexible hours- Sawmills.ai in San Francisco is looking for a Senior Full Stack Engineer to help build our Telemetry Data Management Platform. You will design scalable backend... ...reliable, open-source-friendly solutions and robust observability capabilities. #J-18808-Ljbffr Sawmills.AI Inc.
- ...We are looking for strong Full Stack Engineers to work on large-scale systems. Serving... ...Kubernetes and CI/CD. Good understanding of observability, monitoring and production debugging.... ..., engineers, product leaders, and AI practitioners. Continuous learning: Work...Senior
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