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### Lead Software Engineer | Mentor | Innovator
With over 15 years of experience in software engineering, I have contributed to renowned organizations such as Verizon Media/RYOT, Danske Bank, and ISSUU, along with recent work in health-tech, AI, and large-scale e-commerce, including two years as Lead Engineer for Fashion Nova, one of the top 3 stores on Shopify. My expertise spans developing web-based 3D modeling tools, architecting backend systems from the ground up, building HIPAA-compliant healthcare software, building headless Shopify commerce at scale, and developing AI-powered platforms including RAG systems, document intelligence, and LLM integrations. I am proficient in technologies including JavaScript, TypeScript, React, React Native, Node.js, Python, AWS, Shopify (Storefront API, Shopify Plus), and D3.js, and I'm ranked in the top 1% of TypeScript engineers globally.
As a mentor, I am passionate about fostering continuous learning and excellence. I take pride in sharing knowledge, supporting fellow developers, and contributing to the tech community. My ability to demystify complex concepts, coupled with a proactive attitude and leadership skills, makes me a valuable asset in any learning environment.
### Professional Experience
\- **Toptal** (August 2022 - Present): Lead Software Engineer
\- **Verizon Media/RYOT** (July 2020 - August 2022): Lead Software Engineer
\- **ISSUU** (July 2019 - July 2020): Senior Software Engineer
\- **Danske Bank** (February 2018 - July 2019): Senior Software Engineer
### Recent Highlights
* Built an agentic RAG platform that indexed over 10 million pages and scored 100% on the Vectara RAG benchmark
* Spent 2 years as Lead Engineer at Fashion Nova, one of the top 3 stores on Shopify with over 100 million orders, where I built their React Native mobile app on the Shopify Storefront API and led search and collections work on Shopify Plus.
* Led HIPAA-compliant healthcare development with secure audit logging, role-based access controls, and data protection aligned with ISO 27001 and SOC 2 standards
### Testimonials
* "Sachin is incredibly insightful with full stack development help. He's been helping me for months now and I highly recommend him."
* "Sachin provided exceptional guidance in our assessment of operations and strategic recommendations for the infrastructure at hand."
* "Sachin had the unique ability to interpret our specifications and deliver exactly what we were looking for."
* "As a developer myself, I was stuck on a tricky issue and going nowhere. Sachin provided much-needed help to pinpoint the source of the problem and persevered to resolve the issue. A pleasure to deal with."
* "Sachin is extremely efficient and highly experienced; I highly recommend him for his exceptional skills in communication and debugging."
### Achievements
* Ranked in the top 1% of TypeScript engineers globally on Algora.
* Ranked in the top 0.1% of over 500,000 users on Interviewbit.
* Member of the Toptal network, which selects only the top 3% of freelance talent.
### Connect with Me
\- **Website**: [sachinmour.com](https://sachinmour.com/)
\- **LinkedIn**: [linkedin.com/in/sachinmour](https://linkedin.com/in/sachinmour)
\- **Algora**: [algora.io/profile/sachinmour](https://algora.io/profile/sachinmour)
\- **GitHub**: [github.com/sachinmour](https://github.com/sachinmour)
**Innovating at the intersection of technology and creativity, I am driven by the pursuit of elegant solutions to complex problems.**
Hi! My name is Sam! I'm passionate full-stack developer. I'm a mentor. Have been mentoring for 3 years already. Worked on projects such as https://youstreamer.com, https://cut-out.com.
In free time I try to implement this theory in real algorithms and problems using many python libraries.
Aside from working on the web, I like to play with some new modern technologies like Machine Learning, Blockchain, microcontrollers and so on.
I am a full-stack engineer and engineering leader with over 25 years of experience across big tech, startups, and research organizations. I have worked at Google, Microsoft, Salesforce, Tableau, T-Mobile, and Bill Gates’ think tank, the Institute for Disease Modeling at IV Labs, which later merged into the Bill and Melinda Gates Foundation.
Most recently, I led engineering for Gemini Code Assist at Google, helping take an AI coding assistant from early development to adoption by millions of developers using VS Code and IntelliJ. My work focused on backend systems, developer tooling, platform architecture, and AI-assisted development, with an emphasis on performance, scalability, and real-world developer workflows.
I have also founded startups, served as a CTO, raised venture funding, and taken products from prototype to production and through acquisition. I enjoy working across the stack, wearing multiple hats, and solving ambiguous problems.
I mentor engineers at all stages, from complete beginners to senior candidates preparing for technical interviews. My approach is practical and structured, focusing on strong fundamentals, clear thinking, and building confidence. My primary technical focus today is JavaScript, TypeScript, Node.js, platform engineering, and AI-driven developer tools, with experience across many other languages as needed.
I've helped multiple organizations with moving their applications/infrastructure from POC to production.
Writing applications and solving challenging problems is therapeutic for me. Some of the technologies that I am deeply passionate about includes Typescript, AWS, Serverless, Nodejs and Golang.
Currently I'm working with a fortune 100 client as a tech lead to help them scale their team and project. The tech stack includes AWS, Nodejs, Go, DynamoDB, React.
I am **US-based** and have **30+ years experience** during which I have been an AI user, a software engineer, a programming trainer, a marketer and an entrepreneur.
My current focus is in **long term tutoring** professional in using **AI**, **software development**, and/or **CI/CD DevOps**
Specifically:
1. I specialize in teaching **Claude Code** to non-developers who want to build software
1. I specialize in **Go** and **Bash** but can handle any language; e.g. Python, TypeScript, etc.
2. I love **API**s and can teach you how to call them with command line Bash tools
3. I can teach you how to write API **servers** in Go, and also how to call APIs in Go.
4. I have 25+ years in **SQL** and can teach SQLite, MySQL, or Postgres
5. I can teach you to configure **macOS** and **Linux** for programming
6. I can teach **CI/CD** with **GitHub Actions**, Jenkins, GitLab, or others
7. I can teach using **Docker** containers and/or how to build them
8. I can how to write **Kubernetes** controllers and operators in Go
9. I can teach you how to work with **Digital Ocean** or basics in **AWS**.
I can also teach you many other things. While I don't use Windows daily, I have used it in the past and am familiar with PowerShell and Windows System for Linux so I can help with those if need be.
ALSO, I am great at learning on the fly so if you are interested in me helping you learn something I have not listed I will consider giving a discount for topics that allow me to learn new things while teaching, especially related to AWS.
An accomplished and high-motivated IT professional with 6+ years experience of IT leadership involved in web development, application development and System & Solution Architecture. My main competency is in building rich client-side applications, on both sides back-end and front-end. I strongly believe in TDD as the only way to build a bullet-proof code that makes everyone happy and it allows me to rest at night. Reaching 100% test coverage is my passion.
**SKILLS:**
✅ Specialities: Computer Engineering, Software Engineer, Web Development, Mobile development, Open Source
✅ Languages:Ruby(6 years), Javascript(4 years), Nodejs(1 year), Elixir(1 year)
✅ Backend Frameworks: Ruby On Rails(6 years), Phoenix(1 year)
✅ Frontend Frameworks: AngularJS(4 years), ReactJS(2 years)
✅ Relational database:Postgresql(6 years), MySQL(6 years)
✅ NoSql databases:Elasticsearch(4 years), Redis(3 years), MongoDB(3 years)
✅ Other technologies:Rabbitmq, Redux, Universal rendering, HTML, CSS, SCSS,
BEM, Docker, AWS, Google Cloud Platform, Webpack, Git, Progressive web apps
**LINKS:**
https://github.com/mpospelov
https://stackoverflow.com/users/2460416/mpospelov
https://codementor.io/mpospelov
https://www.upwork.com/o/profiles/users/_~0182077648cc549f21/
https://www.toptal.com/resume/mikhail-pospelov
See the power of our Browser Extensions tutors through glowing user reviews that showcase their successful Browser Extensions learning journeys. Don't miss out on top-notch Browser Extensions training.
“ilyas is absolutely an expert in Chrome extensions. I had been having this issue for weeks and no idea on how to fix it. He's a great listener and was able to figure out the problem expediently. I'll be definitively asking for his help in the near future.“
Moises E. Jaramillo / Nov 2023
ilyas shabi
Browser Extensions tutor
“Femi helped me immensely with the basics of uploading a repo to Github through Visual Studio Code. He was very patient with all my questions, walking me through the process one step at a time. He also was very accommodating of my autism-related communication difficulty, by using text chat and one-way phone call to explain the process.“
Hilary Tsai / Jul 2019
Femi Oladeji
Browser Extensions tutor
“Salako was incredibly helpful and reassuring, answering my many questions and follow-up questions with his expertise. He really helped me weigh each option and weigh the pros and cons of each one. Thank you!“
Aaron A / May 2026
SALAKO TESLIM
Browser Extensions tutor
“Erick has been great at explaining system architecture for Python and Flask, as well as teaching me JavaScript. He is patient, knowledgeable, and explains everything clearly using a variety of tools and examples. I’ve really appreciated his teaching style and support.“
C / May 2026
Erick Alpizar Rivera
Browser Extensions tutor
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Frequently asked questions
How to learn Browser Extensions?
Learning Browser Extensionseffectively takes a structured approach, whether you're starting as a beginner or aiming to improve your existing skills. Here are key steps to guide you through the learning process:
Understand the basics: Start with the fundamentals of Browser Extensions. You can find free courses and tutorials online that cater specifically to beginners. These resources make it easy for you to grasp the core concepts and basic syntax of Browser Extensions, laying a solid foundation for further growth.
Practice regularly: Hands-on practice is crucial. Work on small projects or coding exercises that challenge you to apply what you've learned. This practical experience strengthens your knowledge and builds your coding skills.
Seek expert guidance: Connect with experienced Browser Extensions tutors on Codementor for one-on-one mentorship. Our mentors offer personalized support, helping you troubleshoot problems, review your code, and navigate more complex topics as your skills develop.
Join online communities: Engage with other learners and professionals in Browser Extensions through forums and online communities. This engagement offers support, new learning resources, and insights into industry practices.
Build real-world projects: Apply your Browser Extensions skills to real-world projects. This could be anything from developing a simple app to contributing to open source projects. Using Browser Extensions in practical applications not only boosts your learning but also builds your portfolio, which is crucial for career advancement.
Stay updated: Since Browser Extensions is continually evolving, staying informed about the latest developments and advanced features is essential. Follow relevant blogs, subscribe to newsletters, and participate in workshops to keep your skills up-to-date and relevant.
How long does it take to learn Browser Extensions?
The time it takes to learn Browser Extensions depends greatly on several factors, including your prior experience, the complexity of the language or tech stack, and how much time you dedicate to learning. Here’s a general framework to help you set realistic expectations:
Beginner level: If you are starting from scratch, getting comfortable with the basics of Browser Extensionstypically takes about 3 to 6 months. During this period, you'll learn the fundamental concepts and begin applying them in simple projects.
Intermediate level: Advancing to an intermediate level can take an additional 6 to 12 months. At this stage, you should be working on more complex projects and deepening your understanding of Browser Extensions’s more advanced features and best practices.
Advanced level: Achieving proficiency or an advanced level of skill in Browser Extensions generally requires at least 2 years of consistent practice and learning. This includes mastering sophisticated aspects of Browser Extensions, contributing to major projects, and possibly specializing in specific areas within Browser Extensions.
Continuous learning: Technology evolves rapidly, and ongoing learning is essential to maintain and improve your skills in Browser Extensions. Engaging with new developments, tools, and methodologies in Browser Extensions is a continuous process throughout your career.
Setting personal learning goals and maintaining a regular learning schedule are crucial. Consider leveraging resources like Codementor to access personalized mentorship and expert guidance, which can accelerate your learning process and help you tackle specific challenges more efficiently.
How much does it cost to find a Browser Extensions tutor on Codementor?
The cost of finding a Browser Extensionstutor on Codementor depends on several factors, including the tutor's experience level, the complexity of the topic, and the length of the mentoring session. Here is a breakdown to help you understand the pricing structure:
Tutor experience: Tutors with extensive experience or high demand skills in Browser Extensions typically charge higher rates. Conversely, emerging professionals might offer more affordable pricing.
Pro plans: Codementor also offers subscription plans that provide full access to all mentors and include features like automated mentor matching, which can be a cost-effective option for regular, ongoing support.
Project-based pricing: If you have a specific project, mentors may offer a flat rate for the complete task instead of an hourly charge. This range can vary widely depending on the project's scope and complexity.
To find the best rate, browse through our Browser Extensions tutors’ profiles on Codementor, where you can view their rates and read reviews from other learners. This will help you choose a tutor who fits your budget and learning needs.
What are the benefits of learning Browser Extensions with a dedicated tutor?
Learning Browser Extensions with a dedicated tutor from Codementor offers several significant benefits that can accelerate your understanding and proficiency:
Personalized learning: A dedicated tutor adapts the learning experience to your specific needs, skills, and goals. This personalization ensures that you are not just learning Browser Extensions, but exceling in a way that directly aligns with your objectives.
Immediate feedback and assistance: Unlike self-paced online courses, a dedicated tutor provides instant feedback on your code, concepts, and practices. This immediate response helps eliminate misunderstandings and sharpens your skills in real-time, making the learning process more efficient.
Motivation and accountability: Regular sessions with a tutor keep you motivated and accountable. Learning Browser Extensions can be challenging, and having a dedicated mentor ensures you stay on track and continue making progress towards your learning goals.
Access to expert insights: Dedicated tutors often bring years of experience and industry knowledge. They can provide insights into best practices, current trends, and professional advice that are invaluable for both learning and career development.
Career guidance: Tutors can also offer guidance on how to apply Browser Extensions in professional settings, assist in building a relevant portfolio, and advise on career opportunities, which is particularly beneficial if you plan to transition into a new role or industry.
By leveraging these benefits, you can significantly improve your competency in Browser Extensions in a structured, supportive, and effective environment.
How does personalized Browser Extensions mentoring differ from traditional classroom learning?
Personalized Browser Extensions mentoring through Codementor offers a unique and effective learning approach compared to traditional classroom learning, particularly in these key aspects:
Customized content: Personalized mentoring adapts the learning material and pace specifically to your needs and skill level. This means the sessions can focus on areas where you need the most help or interest, unlike classroom settings which follow a fixed curriculum for all students.
One-on-one attention: With personalized mentoring, you receive the undivided attention of the tutor. This allows for immediate feedback and detailed explanations, ensuring that no questions are left unanswered, and concepts are fully understood.
Flexible scheduling: Personalized mentoring is arranged around your schedule, providing the flexibility to learn at times that are most convenient for you. This is often not possible in traditional classroom settings, which operate on a fixed schedule.
Pace of learning: In personalized mentoring, the pace can be adjusted according to how quickly or slowly you grasp new concepts. This custom pacing can significantly enhance the learning experience, as opposed to a classroom environment where the pace is set and may not align with every student’s learning speed.
Practical, hands-on learning: Mentors can provide more practical, hands-on learning experiences tailored to real-world applications. This direct application of skills is often more limited in classroom settings due to the general nature of the curriculum and the number of students involved.
Personalized mentoring thus provides a more tailored, flexible, and intensive learning experience, making it ideal for those who seek a focused and practical approach to mastering Browser Extensions.