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LangSmith: Observability & Evaluation for LLM Apps

Master LangSmith to debug, monitor,& evaluate Large Language Model applications with structured traces, real-time analytics & custom feedback loops.
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Course Duration: 10 Hours
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LangSmith – Observability & Evaluation for LLM Apps – Online Course
 
LangSmith: Observability & Evaluation for LLM Apps is a specialized, self-paced course designed for AI developers, data scientists, and prompt engineers building production-grade applications using LLMs (Large Language Models). This course introduces learners to LangSmith, a powerful observability platform developed by LangChain, that enables tracing, debugging, evaluation, and human feedback collection for complex AI workflows.
 
 
 
Course Introduction
As AI and LLM-based apps transition from experimentation to production, there is a growing need for tools that provide transparency, reproducibility, and reliability. LangSmith is at the forefront of this movement, offering robust tools for monitoring LLM behavior, logging intermediate steps, collecting structured evaluations, and rapidly iterating with confidence.
 
What is LangSmith?
LangSmith is a developer platform by LangChain for observability and evaluation of applications powered by Large Language Models. It allows developers to trace execution flows, log inputs/outputs at each step, benchmark different LLM chains, and systematically test prompt performance across datasets.
 
This course takes you through LangSmith’s core functionalities—from simple tracing and logging to automated evaluation pipelines using human or model-generated feedback. You’ll learn to integrate LangSmith with LangChain apps, collect analytics, and debug failures with deep visibility into chain-of-thought logic.
 
How to Use This Course
Whether you're building agents, RAG pipelines, or prompt chains, this course equips you with practical tools and use cases. To get the most out of it:
  • Start with basic concepts like tracing and span visualization.
  • Build hands-on projects to test LangSmith integrations with LangChain.
  • Use real datasets and test cases to evaluate prompt and model performance.
  • Practice human-in-the-loop evaluations for reliability testing.
  • Monitor real-time analytics for deployed LLM apps.
The course is structured to take you from first trace to full production observability using LangSmith.

Course/Topic 1 - Coming Soon

  • The videos for this course are being recorded freshly and should be available in a few days. Please contact info@uplatz.com to know the exact date of the release of this course.

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Course Objectives Back to Top
By the end of this course, you will be able to:
 
  1. Understand the role of observability in LLM application development.
  2. Set up LangSmith with LangChain-based Python applications.
  3. Use LangSmith tracing to monitor each step of multi-component chains.
  4. Perform local and remote debugging using traces and logs.
  5. Create custom feedback functions and evaluations.
  6. Benchmark prompt versions across multiple runs and datasets.
  7. Conduct human-in-the-loop and model-in-the-loop evaluations.
  8. Visualize chain behavior with structured span trees.
  9. Integrate LangSmith with CI/CD pipelines for continuous evaluation.
  10. Use LangSmith for production monitoring of live LLM apps.
Course Syllabus Back to Top
Course Syllabus
 
Module 1: Introduction to LangSmith
  • What is LangSmith and why use it?
  • Key features: tracing, feedback, evaluation
  • Installing and setting up LangSmith SDK
Module 2: LangSmith Fundamentals
  • Tracing chains and agents
  • Spans, parent-child relations, and visualizations
  • Exploring LangSmith UI and trace logs
Module 3: Setting Up LangChain Integration
  • Connecting LangChain to LangSmith
  • Tracing tool usage in Python
  • Debugging workflows in LangChain apps
Module 4: Data Traces and Logs
  • Capturing inputs, outputs, and metadata
  • Logging intermediate steps
  • Filtering and searching through traces
Module 5: Custom Feedback Functions
  • Writing feedback logic with Python
  • Score-based vs binary feedback
  • Collecting structured feedback on model outputs
Module 6: Evaluation Datasets
  • Creating datasets from prompts and responses
  • Using evaluation suites to test model performance
  • Dataset versioning and reproducibility
Module 7: Model and Human Evaluation
  • LLM-as-a-judge methods
  • Human-in-the-loop interfaces
  • Comparative evaluation across prompt chains
Module 8: Building Evaluation Pipelines
  • Automating evaluation using LangSmith
  • Using CI/CD for regression testing
  • Scoring models across test sets
Module 9: Production Monitoring
  • Real-time analytics and alerting
  • Monitoring performance drift
  • Visualizing usage and tracing errors
Modules 10–12: LangSmith Projects
  • Evaluating a RAG pipeline with LangSmith
  • Tracing a multi-agent system
  • Setting up continuous evaluation for prompt experiments
Module 13: LangSmith Interview Questions & Answers
Certification Back to Top

Upon successful completion of the LangSmith: Observability & Evaluation for LLM Apps course, you will receive a Certificate of Completion from Uplatz, verifying your proficiency in debugging, evaluating, and managing LLM applications using LangSmith. This certificate is valuable for AI developers, ML engineers, and teams deploying GPT-based apps, especially those aiming to ensure quality, safety, and performance. It signals both practical skills and architectural understanding in building transparent, trustworthy LLM applications.

Career & Jobs Back to Top
production. Mastery of LangSmith opens new career paths in AI development, especially where reliability, explainability, and user trust are essential.
 
By completing this course, you can pursue roles such as:
  • LLM Engineer
  • Prompt Engineer
  • AI Product Developer
  • AI Evaluator / QA Specialist
  • Applied ML Engineer
  • ML Ops / AI Infrastructure Engineer
LangSmith is widely used by teams building customer support bots, retrieval-augmented generation (RAG) systems, autonomous agents, and document-processing pipelines. With the rise of responsible and production-grade AI, professionals who can monitor and evaluate AI outputs are in high demand. This course empowers you with essential skills to contribute meaningfully in this domain.
Interview Questions Back to Top
1. What is LangSmith and how does it support LLM applications?
LangSmith is a developer tool for tracing, debugging, evaluating, and monitoring applications that use LLMs. It gives visibility into chain execution and enables structured feedback collection.
 
2. How does tracing work in LangSmith?
LangSmith records every function call (span) in an LLM chain, displaying inputs, outputs, metadata, and nested logic. This helps developers trace bugs and understand behavior step-by-step.
 
3. What are feedback functions in LangSmith?
Feedback functions are scripts that assign scores or labels to model outputs, either manually or automatically. They help evaluate the quality or correctness of results.
 
4. Can LangSmith be used with models other than OpenAI?
Yes. LangSmith is model-agnostic. It works with any LLM used in LangChain-based apps, including Anthropic, Cohere, Hugging Face, and others.
 
5. How does LangSmith handle human evaluation?
LangSmith supports human feedback collection through interfaces and APIs, allowing annotators to score or compare LLM outputs across tasks.
 
6. What is the benefit of using datasets in LangSmith?
Datasets help run batch evaluations, compare model or prompt versions, and track performance over time—supporting reproducibility and regression testing.
 
7. What is a span in LangSmith’s trace log?
A span represents a unit of execution—e.g., an LLM call, tool invocation, or function output. Spans can be nested to reflect structured flow.
 
8. How can LangSmith integrate with CI/CD?
LangSmith supports automated evaluation in CI/CD pipelines, allowing teams to run performance tests on prompts and chains before deployment.
 
9. What are typical use cases of LangSmith in production?
LangSmith is used for monitoring chatbot interactions, evaluating retrieval responses, auditing sensitive content, and optimizing prompt performance.
 
10. How does LangSmith improve developer productivity?
By offering detailed traces and evaluation tools, LangSmith helps developers debug faster, test more reliably, and iterate on LLM pipelines with confidence.
Course Quiz Back to Top
Start Quiz
Q1. What are the payment options?
A1. We have multiple payment options: 1) Book your course on our webiste by clicking on Buy this course button on top right of this course page 2) Pay via Invoice using any credit or debit card 3) Pay to our UK or India bank account 4) If your HR or employer is making the payment, then we can send them an invoice to pay.

Q2. Will I get certificate?
A2. Yes, you will receive course completion certificate from Uplatz confirming that you have completed this course with Uplatz. Once you complete your learning please submit this for to request for your certificate https://training.uplatz.com/certificate-request.php

Q3. How long is the course access?
A3. All our video courses comes with lifetime access. Once you purchase a video course with Uplatz you have lifetime access to the course i.e. forever. You can access your course any time via our website and/or mobile app and learn at your own convenience.

Q4. Are the videos downloadable?
A4. Video courses cannot be downloaded, but you have lifetime access to any video course you purchase on our website. You will be able to play the videos on our our website and mobile app.

Q5. Do you take exam? Do I need to pass exam? How to book exam?
A5. We do not take exam as part of the our training programs whether it is video course or live online class. These courses are professional courses and are offered to upskill and move on in the career ladder. However if there is an associated exam to the subject you are learning with us then you need to contact the relevant examination authority for booking your exam.

Q6. Can I get study material with the course?
A6. The study material might or might not be available for this course. Please note that though we strive to provide you the best materials but we cannot guarantee the exact study material that is mentioned anywhere within the lecture videos. Please submit study material request using the form https://training.uplatz.com/study-material-request.php

Q7. What is your refund policy?
A7. Please refer to our Refund policy mentioned on our website, here is the link to Uplatz refund policy https://training.uplatz.com/refund-and-cancellation-policy.php

Q8. Do you provide any discounts?
A8. We run promotions and discounts from time to time, we suggest you to register on our website so you can receive our emails related to promotions and offers.

Q9. What are overview courses?
A9. Overview courses are 1-2 hours short to help you decide if you want to go for the full course on that particular subject. Uplatz overview courses are either free or minimally charged such as GBP 1 / USD 2 / EUR 2 / INR 100

Q10. What are individual courses?
A10. Individual courses are simply our video courses available on Uplatz website and app across more than 300 technologies. Each course varies in duration from 5 hours uptop 150 hours. Check all our courses here https://training.uplatz.com/online-it-courses.php?search=individual

Q11. What are bundle courses?
A11. Bundle courses offered by Uplatz are combo of 2 or more video courses. We have Bundle up the similar technologies together in Bundles so offer you better value in pricing and give you an enhaced learning experience. Check all Bundle courses here https://training.uplatz.com/online-it-courses.php?search=bundle

Q12. What are Career Path programs?
A12. Career Path programs are our comprehensive learning package of video course. These are combined in a way by keeping in mind the career you would like to aim after doing career path program. Career path programs ranges from 100 hours to 600 hours and covers wide variety of courses for you to become an expert on those technologies. Check all Career Path Programs here https://training.uplatz.com/online-it-courses.php?career_path_courses=done

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A13. Learning Path programs are dedicated courses designed by SAP professionals to start and enhance their career in an SAP domain. It covers from basic to advance level of all courses across each business function. These programs are available across SAP finance, SAP Logistics, SAP HR, SAP succcessfactors, SAP Technical, SAP Sales, SAP S/4HANA and many more Check all Learning path here https://training.uplatz.com/online-it-courses.php?learning_path_courses=done

Q14. What are Premium Career tracks?
A14. Premium Career tracks are programs consisting of video courses that lead to skills required by C-suite executives such as CEO, CTO, CFO, and so on. These programs will help you gain knowledge and acumen to become a senior management executive.

Q15. How unlimited subscription works?
A15. Uplatz offers 2 types of unlimited subscription, Monthly and Yearly. Our monthly subscription give you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews each month. Minimum committment is for 1 year, you can cancel anytime after 1 year of enrolment. Our yearly subscription gives you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews every year. Minimum committment is for 1 year, you can cancel the plan anytime after 1 year. Check our monthly and yearly subscription here https://training.uplatz.com/online-it-courses.php?search=subscription

Q16. Do you provide software access with video course?
A16. Software access can be purchased seperately at an additional cost. The cost varies from course to course but is generally in between GBP 20 to GBP 40 per month.

Q17. Does your course guarantee a job?
A17. Our course is designed to provide you with a solid foundation in the subject and equip you with valuable skills. While the course is a significant step toward your career goals, its important to note that the job market can vary, and some positions might require additional certifications or experience. Remember that the job landscape is constantly evolving. We encourage you to continue learning and stay updated on industry trends even after completing the course. Many successful professionals combine formal education with ongoing self-improvement to excel in their careers. We are here to support you in your journey!

Q18. Do you provide placement services?
A18. While our course is designed to provide you with a comprehensive understanding of the subject, we currently do not offer placement services as part of the course package. Our main focus is on delivering high-quality education and equipping you with essential skills in this field. However, we understand that finding job opportunities is a crucial aspect of your career journey. We recommend exploring various avenues to enhance your job search:
a) Career Counseling: Seek guidance from career counselors who can provide personalized advice and help you tailor your job search strategy.
b) Networking: Attend industry events, workshops, and conferences to build connections with professionals in your field. Networking can often lead to job referrals and valuable insights.
c) Online Professional Network: Leverage platforms like LinkedIn, a reputable online professional network, to explore job opportunities that resonate with your skills and interests.
d) Online Job Platforms: Investigate prominent online job platforms in your region and submit applications for suitable positions considering both your prior experience and the newly acquired knowledge. e.g in UK the major job platforms are Reed, Indeed, CV library, Total Jobs, Linkedin.
While we may not offer placement services, we are here to support you in other ways. If you have any questions about the industry, job search strategies, or interview preparation, please dont hesitate to reach out. Remember that taking an active role in your job search process can lead to valuable experiences and opportunities.

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A19. To enroll, click on "Buy This Course," You will see this option at the top of the page.
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e) Start learning: After payment, your course will be added to your profile in the student dashboard under "Video Courses".

Q20. How do I access my course after payment?
A20. Once you have made the payment on our website, you can access your course by clicking on the "My Courses" option in the main menu or by navigating to your profile, then the student dashboard, and finally selecting "Video Courses".

Q21. Can I get help from a tutor if I have doubts while learning from a video course?
A21. Tutor support is not available for our video course. If you believe you require assistance from a tutor, we recommend considering our live class option. Please contact our team for the most up-to-date availability. The pricing for live classes typically begins at USD 999 and may vary.
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