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Systems Engineer
PDS Defense
Moorestown, NJ
The Launchers and C-UAS Integrated Engineering team is seeking a Member of Engineering Staff Systems Engineer to support Launchers and Weapons programs within Lockheed Martin's portfolio.…
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Project Lead, Army PM IS&A
The MITRE Corporation
Aberdeen, MD
…long-range precision fires capabilities. This next generation ground system will utilize advanced analytic tools, including AI/ML to aid soldiers in collecting and interpreting vast volumes…
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MC
Construction Project Manager-26-00066J
MBA CSi
Jersey City, NJ
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00066J
MBA CSi
Columbus, OH
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00066J
MBA CSi
Carol Stream, IL
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00066J
MBA CSi
Denver, CO
- $70,000 to $90,000 USD / year
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Construction Project Manager-26-00072J
MBA CSi
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- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00072J
MBA CSi
Columbus, OH
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00072J
MBA CSi
Carol Stream, IL
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00067J
MBA CSi
Denver, CO
- $85,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00067J
MBA CSi
Plano, TX
- $85,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Junior Human Factors Engineer-26-00079L
MBA CSi
Merrifield, VA
- $75,000 to $80,000 USD / year
Human Factors Engineer – Ergonomics & Usability Engineering
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Construction Project Manager-26-00055J
MBA CSi
Jersey City, NJ
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00055J
MBA CSi
Columbus, OH
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
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Construction Project Manager-26-00055J
MBA CSi
Carol Stream, IL
- $70,000 to $90,000 USD / year
MBA Consulting Services, Inc. is seeking a skilled Project Manager (Architect/Engineer) to lead small design and construction projects for the United States Postal Service’s (USPS)…
Added 1 min ago
C
Data Engineer Consultant
Chartis
Remote, United States
- $75 to $90 USD / hour
- Design, fine-tune, and troubleshoot existing SSIS ETL processes that transform clinical data sets into the OMOP data warehouse schema that is unique to the University of California system
Added 2 mins ago
Linux Engineer
MANTECH
Norfolk, VA
Must possess a current VMware, Windows, or Linux Operating System (OS) certification, or obtain one within 3 months of employment
Added 2 mins ago
Systems Integration Testing, Ground Systems Engineer / Space Programs
Peraton
New Smyrna Beach, FL
Peraton is seeking a mid-level Ground Systems Engineer to support NASA’s Launch Communications Segment at the Kennedy Uplink Station (KUS) at KSC Florida and the Ponce De Leon (PDL)…
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Cloud Infrastructure Engineer
Peraton
Chantilly, VA
Peraton is seeking a Cloud Infrastructure Engineer to support enterprise cloud and infrastructure initiatives within a collaborative, high-performing systems engineering team. This role…
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Senior Software Engineer - Huntsville, Alabama
Davidson Technologies, Inc.
Huntsville, AL
Davidson is actively seeking a skilled Senior Software Engineer in Huntsville, AL.
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Senior Principal Information Security Analyst, Defensive Operations
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10+ years in IT, including 5+ years in security operations or as a monitoring system manager or lead engineer.
Added 5 mins ago
Associate Technology Consultant - Galaxy Graduate Program
Celonis
NC
Make Celonis Business Critical: Transform the platform into the central nervous system of our customers’ operations.
Added 5 mins ago
Associate Technology Consultant - Galaxy Graduate Program
Celonis
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Make Celonis Business Critical: Transform the platform into the central nervous system of our customers’ operations.
Added 5 mins ago
MAP A320 Systems Engineer
Airbus Americas, Inc.
Mobile Area, AL
…or Systems Engineering with 5 years of experience as Systems Engineer, or similar, in the aerospace industry. Experience should include commercial aircraft system trouble shooting and…

Closed listing

LangChain

Senior Backend Software Engineer, AI Observability & Evals Platform (NYC)

New York, NY, United States

$180,000 to $240,000 USD / year

This opening has closed.

The original listing is kept below for reference.

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Job details

Pay: $180,000 to $240,000 USD / year
Experience: 5+ years of professional experience in backend engineering working on highly complex products
Posting language: English
Posted: Nov 2, 2026

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Original job description

Archived listing. The details below describe a past opening.

ABOUT US

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.

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.

Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater.

ABOUT THE TEAM

The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems. From tracing and annotation to run rules, evaluations, and beyond, this team owns LangSmith end-to-end. If you want to define what great AI observability looks like at production scale, this is where that work gets done.

ABOUT THE ROLE

We are looking for a Senior Backend Engineer to join us. In this role you will be building the backend systems that power LangChain’s observability and evals platform. You will work on the core services that allow developers to monitor and evaluate their AI applications at scale. While the focus is on backend feature development, familiarity with fullstack or frontend engineering, performance tuning, and debugging production issues would be extremely valuable.

WHAT YOU'LL DO

Design, develop, and maintain backend services and APIs to support LangSmith’s tracing, monitoring, and evaluation workflows.
Collaborate on architectural decisions to ensure systems are performant and maintainable.
Optimize storage and query performance for high-volume observability and evaluation data.
Ensure system reliability through strong testing, monitoring, and alerting practices.
Troubleshoot and resolve production issues, performing root-cause analysis and implementing long-term fixes.
Create and maintain technical documentation, including system design and API references.
Work closely with full-stack engineers, product managers, and product designers on rolling out new features.

WHAT YOU'LL BRING

5+ years of professional experience in backend engineering working on highly complex products
Proficiency in one or more backend languages/frameworks, ideally Python or Go
Strong understanding of API design and building reliable data services.
Experience with high-throughput or mission-critical systems.
Demonstrated ability to optimize backend services for performance and reliability.
Experience with database systems (Postgres, Redis, Clickhouse), and cloud platforms (AWS, GCP, Azure)
Strong communication skills, with the ability to collaborate cross-functionally
Customer centricity and ownership mentality

Compensation

Annual salary range: $180,000- $240,000

Compensation Philosophy:

We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks.

We are hiring for this role across a range of scope, and the compensation band reflects that. Your offer depends on what we learn about your impact, craft, leadership, and communication during the interview process. We will tell you early where you’re tracking and talk comp with you before offer stage. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations.

BENEFITS

Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.

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Jobs in the United States