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### Arc.dev profile
Senior backend engineer / DevOps / SRE roles. Ex-Google, years of experience working as a freelance developer.
### Codementor profile
I studied an MEng in Computer Science in Spain, and moved to Ireland to work at Google as a Site Reliability Engineer for five years. Them I moved in Argentina, to teach in the country’s biggest University.
* I have wide experience teaching how to program, and in explaining the foundational concepts of Computer Science.
* I can also help delving into more low-level topics like network programming and operating system internals.
* Finally, Data Science & Machine Learning is an area of interest, and I can help you in courses that touch these topics.
Being a software developer is more than just learning to program in a computer language. I have been building .NET web apps for years and multiplayer games since 2015, using Unity 3D using Photon Fusion (server-authoritative). I have also designed and/or worked on enterprise web sites from concept to deployment, some high-profile projects. I have served as a Senior or Lead Developer for years, mentoring other developers and encouraging them to use the latest technologies and best practices. For tutoring, I would focus on teaching design patterns, using events and encapsulation when designing applications and reinforcing the need to keep your skillset current as new technologies are released. I can give advice on how to focus your learning efforts to target specific types of development positions, and interviewing advice for finding a position within a software company. I had been a developer in C++ for about 10 years prior to using C# and focused on web technologies prior to working with Unity 3D.
While I have primarily been using Unity 3D and Microsoft .NET / C# recently, I have also utilized legacy technologies like Classic ASP, VB and [VB.NET](http://vb.net/), COM/DCOM, worked with Linux/PHP/MySQL from time to time, and worked with the Microsoft SQL Server/Express/CE products for 10+ years. I also have formal SCRUM training, which is used by many companies for handling team project management.
For Unity 3D multiplayer networking projects I typically work with and recommend Photon Fusion along with PlayFab integrations, PlayFab Matchmaking, and PlayFab GameServers.
If your college project is a "Concept to POC" type of project where the Proof of Concept is the working software required for a grade, then I will also teach you to use a Git repository to manage the project (or Plastic/UVCS for Unity projects).
I can help you document the Project Scope, Functional Specs, create Design Documents, and build the presentation for your college project. We can build completed projects in a short time, both the user interface and the server components as needed.
My focuses are Unity 3D, Photon Fusion, PlayFab, C#, .NET Core, [ABP.io](http://abp.io/) backend (Blazor/.NET MVC/SQL Server)
Always learning and always yearning, I sincerely believe that we can achieve greater heights by collaborating on our problems. I love to be involved with technical communities in different capacities and enjoy solving issues. I have had more than 50 mentoring sessions on HackHands ( http://www.hackhands.com/hiren ). Currently I run my own business, which is into mobile apps and websites.
I am a long-time [open-source contributor and Linux enthusiast](https://www.archlinux.org/people/developer-fellows/#schiv). In the past I spent most of my time staring at black screens with green text scrolling endlessly for hours and days. I am now a practitioner of [Knowledge Science](https://www.infoworld.com/article/3448577/who-should-be-responsible-for-your-data-the-knowledge-scientist.html), an emerging subdiscipline of Computer Science allied with the goals of [explainable](https://www.forbes.com/sites/forbestechcouncil/2019/12/30/explainable-ai-the-rising-role-of-knowledge-scientists/#395937a2603f), ["semantic"](https://www.poolparty.biz/semantic-ai/) artificial intelligence (AI). With a background in the [Semantic Web](https://www.dataversity.net/semantic-web-and-semantic-technology-trends-in-2020/#) and traditional [symbolic AI](https://en.wikipedia.org/wiki/Knowledge_representation_and_reasoning), I am a graph database specialist fully invested in data modelling and programming with semantic technologies.
While as a Computer Scientist I am inclined on research and development (R&D), nothing gives me more satisfaction than building or leading a software technology project from inception to production, especially so at the bleeding-edge. I regret that I may be time-constrained, but you are welcome to check in with me for quick consultations.
I'm a **Senior Software Engineer with 10+ years of experience** designing, building, and deploying production applications, APIs, SaaS platforms, and AI-powered products.
I specialize in **full-stack development, AI agents, and LLM-powered applications**, combining years of hands-on software engineering experience with modern AI technologies.
I'm an active software engineer who also enjoys helping other developers. Although I'm no longer mentoring full-time, I'm available for occasional **1-on-1 coding sessions, debugging, architecture guidance, and code reviews**.
### 🤖 AI Engineering & Agents
- **LLMs:** OpenAI, Anthropic Claude, Google Gemini, Groq, AWS Bedrock, and local models (Ollama, LLaMA)
- **AI Frameworks:** Vercel AI SDK, Google ADK, LangChain, CrewAI, AutoGen
- **AI Agents:** Tool/function calling, MCP (Model Context Protocol), multi-agent systems, autonomous workflows
- **Voice AI:** LiveKit, real-time voice agents, telephony integration, browser-based voice calls
- **RAG & Knowledge Bases:** Vector search, embeddings, MongoDB Atlas Vector Search, retrieval pipelines
- **LLM Engineering:** Prompt engineering, structured outputs, evaluations (evals), testing, observability, and reliability
### 🚀 Full-Stack Software Development
- **JavaScript & TypeScript:** React, Next.js, React Native, Expo, Astro
- **Backend:** Node.js, Express, Fastify, REST APIs, GraphQL
- **Python:** FastAPI, Flask, automation, API development
- **Databases:** MongoDB, PostgreSQL, Redis
- **Frontend:** HTML, CSS, SCSS, Tailwind CSS
- **Testing:** Playwright, Vitest, Jest
### ☁️ Cloud, DevOps & Infrastructure
- **Cloud Platforms:** AWS, Google Cloud, Vercel, Cloudflare, DigitalOcean
- **Linux & Containers:** Ubuntu, Debian, Docker, Bash
- **Serverless:** AWS Lambda, Cloudflare Workers, Vercel Functions
- **CI/CD & Monitoring:** GitHub Actions, Jenkins, Sentry, New Relic
### 💡 How I Can Help
Whether you're debugging a React application, building a backend API, integrating an LLM, developing an AI voice agent, or planning the architecture of a new product, I can help you work through the challenges.
I bring **real-world engineering experience** to mentoring sessions, focusing on practical solutions, clean architecture, and understanding the trade-offs behind technical decisions.
I have also spent years teaching and mentoring developers, helping beginners and experienced engineers improve their skills and confidence.
❤️ **Open source enthusiast:** [github.com/gianpaj](https://github.com/gianpaj)
**Stuck on a problem or need a second opinion?** Click **Let's Chat** and tell me what you're working on.
IT specialist / Developer with Master's degree in MIS now cumulating about 17 years of experiences which includes an in depth knowledge and experiences in programming languages such as Java , C, C++, databases programming.
I also have excellent experiences working with web technologies AngularJS, NodeJS, JQuery, HTML5, CSS, Javascript, Java, PHP Mysql, Linux, DNS ..
Throughout my career I had the opportunity to work with various industries such as Energy, Non profit , Banking and Governmental Organizations. I had performed numerous roles as Developer, Manager and Tech Lead in which I helped lead many projects to completion.
My experiences includes a very rich set of topics with proven results such as :
Application development, database programming, data analysis, marketing, Business development, Report development, project management, system design, system administration, web and scripting languages
As an expert in my field, I have achieved excellent problem solving, deep thinking and analytical skills that have helped me achieved most of my goals.
See the power of our Network administration tutors through glowing user reviews that showcase their successful Network administration learning journeys. Don't miss out on top-notch Network administration training.
“Seriously, Adrian solved my issue that I had been banging my head against for hours over the course of over a week in under 20 minutes. Dude's a rock star“
Kevin / Feb 2025
Adrian Segui
Network administration tutor
“Brian is a great resource for any programming needs, he is attentive to details, straight to the solution and create absolute clarity on the coding problems and path to solution with ease.“
J T / Dec 2022
Brian Olson
Network administration tutor
“Amazing, he helped with cisco routers and switches. He was so patient with the problem i had, he made me understand it better Thank you eric“
Ill Jasmine / Nov 2020
Eric Bescona
Network administration tutor
“Dejan was very knowledgeable about the industry, what interviews are like, and had a good idea of how to approach a problem you hadn't seen before. His plan for me to reach my goals is intriguing and I look forward to working with him more!“
Javamouse / Sep 2026
Dejan B.
Network administration tutor
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We'll help connect you with a Network administration tutor that suits your needs.
Find the most suitable Network administration tutor by chatting with Network administration experts.
Arrange regular session times with Network administration tutors for one-on-one instruction.
Frequently asked questions
How to learn Network administration?
Learning Network administrationeffectively 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 Network administration. 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 Network administration, 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 Network administration 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 Network administration through forums and online communities. This engagement offers support, new learning resources, and insights into industry practices.
Build real-world projects: Apply your Network administration skills to real-world projects. This could be anything from developing a simple app to contributing to open source projects. Using Network administration in practical applications not only boosts your learning but also builds your portfolio, which is crucial for career advancement.
Stay updated: Since Network administration 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 Network administration?
The time it takes to learn Network administration 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 Network administrationtypically 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 Network administration’s more advanced features and best practices.
Advanced level: Achieving proficiency or an advanced level of skill in Network administration generally requires at least 2 years of consistent practice and learning. This includes mastering sophisticated aspects of Network administration, contributing to major projects, and possibly specializing in specific areas within Network administration.
Continuous learning: Technology evolves rapidly, and ongoing learning is essential to maintain and improve your skills in Network administration. Engaging with new developments, tools, and methodologies in Network administration 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 Network administration tutor on Codementor?
The cost of finding a Network administrationtutor 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 Network administration 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 Network administration 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 Network administration with a dedicated tutor?
Learning Network administration 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 Network administration, 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 Network administration 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 Network administration 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 Network administration in a structured, supportive, and effective environment.
How does personalized Network administration mentoring differ from traditional classroom learning?
Personalized Network administration 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 Network administration.