DEV Community: juan pablo abadia medina

Before Adding AI or Blockchain, Define the Verification Layer

juan pablo abadia medina — Fri, 13 Nov 2026 03:31:26 +0000

A system can generate an answer, store a record, and display a successful transaction while still failing the user.

Before selecting an AI model or deploying a smart contract, developers should define where the information originates, who can validate it, how errors are corrected, and what happens when an external dependency fails.

Consider a certificate verification application. A blockchain can help establish that a particular record existed at a given point in the workflow. It cannot independently prove that the institution entered truthful information.

Likewise, an AI assistant can summarize a certificate, but its response should not replace authoritative verification.

A practical architecture starts with trusted inputs, explicit permissions, audit logs, correction procedures, and human review. Only then should the team decide which components benefit from AI or decentralized infrastructure.

The best technical decision is sometimes not to use the most fashionable technology.

What verification failure would you design against first?

Blockchain Sin Filtros: An English Guide to All 52 Episodes

juan pablo abadia medina — Thu, 12 Nov 2026 22:51:07 +0000

Language note: All videos are in Spanish. This guide provides English titles and short summaries for all 52 episodes.

Blockchain Sin Filtros is a podcast by Juan Pablo Abadía Medina about blockchain, crypto security, digital government, and technology education in Colombia. The episodes below are listed in order, from the first season to the latest episode in this guide.

Listen to Blockchain Sin Filtros on Spotify (in Spanish)

Season 1 — Blockchain fundamentals and crypto security

EP01 · EVMs, Data, Wallets, and Crypto Scams — An introduction to Ethereum-compatible networks, blockchain data, wallets, stablecoins, and common crypto scams.
EP02 · Tokens, Cryptocurrencies, and Stablecoins — How these categories overlap and what each term tells you about a digital asset.
EP03 · How to Create and Secure a Crypto Wallet — What seed phrases and private keys do, and why they matter when you manage your own wallet.
EP04 · The Virtual Machine Behind Ethereum, Polygon, BNB, and Scolcoin — What the Ethereum Virtual Machine does and why different networks use it.
EP05 · How to Spot a Crypto Ponzi Scheme — Warning signs to look for when a blockchain project promises investment returns.
EP06 · Public vs. Private Blockchains — How the two models differ in who can access and participate in the network.
EP07 · What Is a Blockchain Node? — What nodes do in Bitcoin and Ethereum-compatible networks.
EP08 · Bitcoin Whales and Market Movements — How large holders can influence market activity and what that can mean for smaller traders.
EP09 · AI and Blockchain in 2026 — Where artificial intelligence and blockchain could intersect.
EP10 · Modern Scams Involving Deepfakes, Fake Apps, and AI — How scammers use impersonation, lookalike apps, and AI to make fraud more convincing.
EP11 · Stablecoins and the U.S. Economy — The host’s perspective on stablecoins and their potential role in changes to the U.S. financial system.
EP12 · The Story of Scolcoin — Juan Pablo’s account of the origins of Scolcoin, a Colombian blockchain project.
EP13 · Smart Contract Traps That Can Drain Wallets — The risks of interacting with malicious smart contracts.
EP14 · Blockchain and Elections in Colombia — How blockchain might change the way election processes are documented and verified.
EP15 · Season Finale: Getting Started With Crypto — A beginner-focused wrap-up on entering crypto and avoiding costly mistakes.

Season 2 — Digital government and public oversight

EP16 · Digital Government and Politics 4.0 — What digital government could mean for states with limited resources.
EP17 · Colombia 4.0 and the Power of Digital Government — How digital systems can shape public services and the way institutions exercise power.
EP18 · Transparency in Local and Regional Government — Where data, AI, and chatbots could fit in Colombia’s local and regional administrations.
EP19 · Small Contracts, Large Losses — How oversight gaps in small municipal contracts can expose public funds to misuse.
EP20 · The Digital Evolution of Public Procurement — How digitization could change contracting and competitive bidding in Colombia.
EP21 · Making Congress Easier to Follow — How digital tools could help people follow legislative decisions and the process of making laws.
EP22 · Departmental Assemblies and Public Transparency — Why citizens should be able to follow the decisions of Colombia’s regional assemblies.
EP23 · Why Municipal Councils Matter — How local council decisions affect everyday life.
EP24 · Colombia’s Territorial Planning Councils — The role of these councils in participatory planning and the challenges they face.
EP25 · Community Action Boards and Local Administrative Boards — How Colombia’s JACs and JALs connect neighborhood participation with local government.
EP26 · Technology for Preventive Public Oversight — How technology could help Colombia’s Procuraduría identify problems earlier.
EP27 · Can Blockchain Make Public Audits More Timely? — A proposal to use blockchain records to support earlier, more automated oversight by the Comptroller’s Office.
EP28 · Prosecutors, Blockchain, and Privacy — Whether blockchain could support accountability in Colombia’s prosecution service while protecting privacy.
EP29 · Police and Military Logistics in Colombia — A look at logistical challenges in public security and defense institutions.
EP30 · Season Finale: What the State Can See — How gaps in government information can delay oversight and accountability.

Season 3 — GovTech, public infrastructure, and digital services

EP31 · What If Colombia Were Managed Like a Well-Run Company? — A thought experiment about applying management practices and GovTech tools to public administration.
EP32 · Digital Twins, the Metaverse, and Smart Cities — What these concepts have in common and how they might apply to Colombian cities.
EP33 · Ponwi and Digital Identity for Public Services — A proposal for how digital identity could change interactions with the Colombian state.
EP34 · What Could Become Colombia’s Next Oil? — A look at blockchain and AI as potential drivers of Colombia’s economy.
EP35 · Public-Sector Digital Mining, Bitcoin, and AI — A proposal that explores digital mining and computing as part of Colombia’s economic future.
EP36 · The State as a Startup Incubator — What Colombia could learn from Israel’s approach to developing talent and supporting innovation.
EP37 · How Students Could Earn Before Graduation — How digital education could help young people apply their skills and earn income while studying.
EP38 · AI, Blockchain, and Preventive Healthcare — How digital tools could support prevention and earlier intervention in Colombia’s healthcare system.
EP39 · Tokenized Infrastructure and Regional Accountability — How tokenization could make regional infrastructure projects easier to track.
EP40 · Blockchain and AI for Public Works — How digital records and automated checks could help monitor public construction projects.
EP41 · Smarter Taxes and Less Paperwork — Ideas for simplifying tax administration and interactions with Colombia’s tax authority, DIAN.
EP42 · Government as a Platform: A National API — A proposal for connecting government systems and services through shared APIs.
EP43 · Data as a National Asset — Why data matters as an economic resource in Colombia’s digital economy.
EP44 · Public Transparency Without Persecution — How public institutions might improve visibility while protecting people from persecution.
EP45 · Colombia 4.0 and the Country’s Digital Future — A season wrap-up on how Colombia could use technology to build new capabilities.

Season 4 — Colombia 5.0, talent, and building projects

EP46 · Colombia 5.0: Exporting Talent — How education and hands-on work could prepare Colombian talent for international opportunities.
EP47 · From a Company to a Web3 Ecosystem — How Ponwi, Ponwi Academy, mentoring, and Scolcoin fit together. Watch Part 1 · Watch Part 2.
EP48 · Turning What You Learn Into a Real Project — How Ponwi Academy connects learning with building a practical project.
EP49 · From Learning Blockchain to Building With It — Two Shorts on what you can build with blockchain and how traceability connects to the Ponwi Academy blockchain program. Watch Part 1 · Watch the traceability Short.
EP50 · Blockchain Bootcamp: Learn by Building — A Short introducing project-based learning in the blockchain bootcamp.
EP51 · Technology Showroom: Demonstrate What You Can Build — A Short on using a demonstration to show what a technology project can do.
EP52 · Blockchain Masterclass: Learn From Experience — A Short on applying lessons from experience to practical blockchain solutions.

Which topic would you like to see explored in a full English article? Share the episode number and the question you would want it to answer.

Five Checks Before Calling a Web3 Prototype Production-Ready

juan pablo abadia medina — Thu, 12 Nov 2026 20:30:44 +0000

A successful smart contract deployment is not the same as a production-ready application.

Before release, I would want the team to demonstrate five things:

Network identity. Confirm the expected chain ID, deployment address, contract bytecode, and configuration.
Reproducibility. Show that another developer can repeat the deployment and verification process in a controlled environment.
Failure handling. Test RPC timeouts, failed transactions, delayed confirmations, and unavailable external services.
Access control. Verify privileged operations, key management, permission boundaries, and recovery procedures.
Data integrity. Document how off-chain information is collected, validated, and connected to on-chain records.

These checks do not guarantee security. They make important assumptions visible and create a starting point for independent testing.

A useful technical write-up should include the environment, test procedure, expected result, observed result, and known limitations.

Which of these checks has revealed the most unexpected problems in your projects?

Building with Blockchain and AI: What I’m Here to Share

juan pablo abadia medina — Tue, 10 Nov 2026 20:17:46 +0000

Hi, DEV! I’m Juan Pablo Abadía Medina, a full-stack developer and technology entrepreneur from Valle del Cauca, Colombia.

I founded Blockchain Technology S.A.S. and created Ponwi and Ponwi Academy. My work brings together software development, blockchain, AI, and technology education.

For my first post, I want to introduce the questions I’ll explore here—and hear what other developers are working on.

From an idea to a maintainable application

An idea can sound straightforward: verify a certificate, automate a report, or help people understand public information.

Building it raises more questions:

Where does the information come from?
Who can create, change, or verify a record?
What happens when an external service becomes unavailable?
How will someone correct a mistake?
Who will maintain the application after launch?

I’m interested in the decisions behind those answers, including the tradeoffs that rarely appear in a product demonstration.

What I’ll write about

Blockchain and Web3

Smart contracts, application integration, verification workflows, and the practical responsibilities of operating blockchain infrastructure.

I want to explain what each component contributes and which assumptions still depend on people or organizations.

AI and automation

Workflows that reduce repetitive work, with attention to input quality, human review, and failure handling.

For example, an assistant that drafts a report still needs a clear source of information and a way for someone to check its output.

Full-stack development

The connections between interfaces, APIs, databases, and infrastructure—and the debugging that happens between them.

I plan to share focused examples, explain implementation choices, and document limitations.

Public innovation and citizen participation

I’m also interested in software that helps people understand information and contribute to public processes.

A useful starting question is: can a person understand what the application shows, take a meaningful action, and find out what happened afterward?

A small exercise before starting a project

Here is a project brief I find useful:

We are helping [a specific user] complete [a specific task].

Today, they struggle with [an observable problem].

We will evaluate progress through [a measurable outcome].

The first version will include [a limited scope].

Someone will be responsible for [review, support, and maintenance].

Consider a hypothetical reporting tool:

We are helping a small business owner prepare a weekly sales summary. Today, they manually combine several spreadsheets. We will measure preparation time and correction requests. The first version will import one agreed file format and produce a draft for review. The owner will approve the report before sharing it.

That brief gives a developer something concrete to investigate. It also creates room to decide whether the task needs a script, a conventional web application, an AI component, or another approach.

Let’s connect

I’m here to exchange ideas, learn from other builders, and contribute practical explanations.

What are you building right now—and which technical decision has been hardest to make?

You can find my work here: