JUANCHI

Software Architect, Senior Full Stack, Applied AI

Currently Head of Architecture at Lakaut

I design and modernize real systems: digital signatures, identity, external integrations, Java legacy, Next.js, PostgreSQL, and AI automation.

View technical cases Talk about a senior role

Architecture: digital signatures, identity, integrations
Leadership: code review, mentoring, standards
Full Stack: Next.js, Java, PostgreSQL, Docker
AI Engineering: LLMs, agents, automation

I do not sell hours: I reduce technical risk and speed up hard decisions.

My edge is connecting architecture, development, infrastructure, and product when teams need to modernize without breaking production.

Legacy modernization

Domain separation, explicit contracts, gradual migrations, and decisions that respect the business already running.

Java, Spring, domain services, integrations, and controlled technical debt.

Product architecture

Stack decisions, security, scalability, DX, technical documentation, and explicit trade-offs.

Current experience making cross-cutting architecture decisions.

AI applied to real workflows

LLM automations, internal pipelines, human-approved agents, and tools that help teams ship.

Content systems, audits, assisted generation, and human-in-the-loop flows.

Senior full stack execution

Internal products, dashboards, auth, APIs, databases, and production frontend with operational judgment.

Next.js, React, TypeScript, PostgreSQL, Prisma, Docker, and Railway.

What I am looking for, and what is not a fit.

What I am looking for

Senior or staff roles with architecture, modernization, and real technical ownership.
Teams that need to connect product, backend, frontend, security, and infrastructure.
Work where public evidence, quality, and operations matter more than technical theater.

What is not a fit

Purely junior roles, repetitive support, or maintenance with no decision space.
Cultures that value ticket volume above technical judgment and learning.
Offers without clear role context, modality, stack, or compensation range.

Public evidence of how I think and build.

These projects show architecture, security, tooling, product judgment, and the ability to finish usable software.

GreenGate

Human-approved agents with Auth0 CIBA and Gemini. The agent proposes, the phone approves before data changes.

DEV Weekend Challenge winner: Best Use of Auth0 for Agents.

Auth0 CIBA · Gemini · Next.js · PostgreSQL

Read full architecture case study →Evidence & code Let’s discuss GreenGate

Post-Quantum Signing

Software HSM with ML-DSA and SLH-DSA to explore post-quantum digital signatures through a swappable interface.

Benchmark and migration pattern for modern keys and signatures.

TypeScript · ML-DSA · SLH-DSA · Crypto-agility

Read full architecture case study →Evidence & code Let’s discuss Post-Quantum Signing

juanchi.dev

Personal full-stack platform with CMS, admin, analytics, auth, bilingual content, and AI-assisted generation.

A real production system, not a template or static landing page.

Next.js 16 · Prisma · PostgreSQL · Coolify

Read full architecture case study →Evidence & code Let’s discuss juanchi.dev

CertView / X.509 tooling

Tooling for inspecting certificates from VS Code and JVM apps, connecting security, DX, and infrastructure.

Public tools for concrete technical workflows.

TypeScript · VS Code API · X.509 · Kotlin

Read full architecture case study →Evidence & code Let’s discuss CertView / X.509 tooling

Contact about a senior role View LinkedIn View GitHub View all technical case studies →

Recent recognition

GreenGate won Best Use of Auth0 for Agents

DEV selected GreenGate in the Weekend Challenge: Earth Day for using Auth0 CIBA to keep a human in the loop: the agent proposes an action, and phone approval is required before data changes.

Official announcement Read the post

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