dcoder.
Bespoke digital products · senior-led delivery
DCODER turns complex operations into bespoke digital products, bringing strategy, architecture, experience and engineering under one senior, accountable direction.
// what we build
From critical decisions to
reliable operation.
We plan, design, build and evolve each product as one coherent operation, with senior direction from the first decision through continuous improvement.
Web apps · systems & SaaS · automation · AI agents · integrations · e-commerce · cloud & DevOps
Products built for real operations.
Selected cases that demonstrate responsibility across product decisions, complex engineering and long-term operation.
Canoe
Marketplace for boat tours in Brazil with Stripe Connect payments, PWA, and multi-role management.
Amachains Orde
Industrial carbon footprint platform with React Flow visual modeling, ISO 14044 allocation, real-time collaboration and forward/reverse traceability.
ChatMood
Real-time Twitch chat sentiment analysis with AI, live dashboards and subscription billing.
Rede Capanema
Multi-vendor marketplace with MercadoPago split payments and AI product creation.
Quinta do Sol
Two custom websites connecting hotel booking, property presentation and fleet service operations.
Strategy, design and engineering under one direction.
André Defrémont
Founder & Technical Director
DCODER is a bespoke software studio responsible for turning complex needs into coherent digital products. Planning, architecture, UI/UX and engineering work as one operation, with clear ownership from discovery through launch.
Over 13 years of experience, we have turned business-critical needs into dependable systems. Today, six clients operate products built by DCODER, including payment marketplaces, industrial platforms and AI-assisted operations.
Product planning
Discovery, requirements, priorities, product definition and delivery roadmap.
Architecture & integration
System design, APIs, data, payments, ERP and CRM integrations.
UI/UX & frontend
User flows, interface design, responsive experiences and modern web applications.
Engineering & operation
Backend, cloud, AI automation, quality, launch, monitoring and continuous evolution.
// technical_leadership
Experience and education timeline
Experience and education timeline
13+ years progressing from technical support to studio leadership, product architecture and national-scale distributed systems.
2025 — Present
DCODER
Founder & Senior Full-Stack Engineer
Leads custom products and AI automation for recurring business clients, from planning and architecture through deployment, transparency and ongoing support.
Mar 2020 — Present
Amachains
Chief Information Officer & Full-Stack Engineer
Owns technical direction, architecture and roadmap while coordinating a small engineering team and stakeholders across web, blockchain, AWS and Kubernetes delivery.
Apr 2024 — Feb 2026
RNP
Blockchain Software Engineer
Built and maintained national-scale distributed-ledger infrastructure with Hyperledger Fabric, Besu, Bevel, Ethereum, Kubernetes and Helm.
Jul 2019 — Mar 2020
Equilibrium Web
Full-Stack Software Engineer
Developed user-centered digital solutions, evolved AngularJS applications and optimized a Java legacy system for reliability and performance.
Apr 2018 — Jul 2019
XIFIX Tecnologia
Full-Stack Software Engineer
Built and maintained React.js and Node.js applications, C# systems and PHP websites for content and marketing platforms.
Jan 2017 — Jan 2018
UFPA
Web Software Engineer
Developed and maintained Joomla websites supporting academic programs and university community engagement.
Jun 2012 — Jul 2016
XIFIX Tecnologia
Software Engineer
Progressed from technical support into software development, contributing to applications and features with Node.js, React.js, C# and PHP.
// education
2021 — 2023 · UFPA
M.Sc. in Computer Science
Computer Systems Networking & Telecommunications, focused on Blockchain and Sustainability.
2013 — 2017 · UFPA
B.Sc. in Information Systems
Computer Systems Networking & Telecommunications, with a thesis on Blockchain Technology.
Founder & Senior Full-Stack Engineer
DCODER
Leads custom products and AI automation for recurring business clients, from planning and architecture through deployment, transparency and ongoing support.
Chief Information Officer & Full-Stack Engineer
Amachains
Owns technical direction, architecture and roadmap while coordinating a small engineering team and stakeholders across web, blockchain, AWS and Kubernetes delivery.
Blockchain Software Engineer
RNP
Built and maintained national-scale distributed-ledger infrastructure with Hyperledger Fabric, Besu, Bevel, Ethereum, Kubernetes and Helm.
Full-Stack Software Engineer
Equilibrium Web
Developed user-centered digital solutions, evolved AngularJS applications and optimized a Java legacy system for reliability and performance.
Full-Stack Software Engineer
XIFIX Tecnologia
Built and maintained React.js and Node.js applications, C# systems and PHP websites for content and marketing platforms.
Web Software Engineer
UFPA
Developed and maintained Joomla websites supporting academic programs and university community engagement.
Software Engineer
XIFIX Tecnologia
Progressed from technical support into software development, contributing to applications and features with Node.js, React.js, C# and PHP.
M.Sc. in Computer Science
UFPA · Education
Computer Systems Networking & Telecommunications, focused on Blockchain and Sustainability.
B.Sc. in Information Systems
UFPA · Education
Computer Systems Networking & Telecommunications, with a thesis on Blockchain Technology.
Trust earned through delivery
"Excellent professional, exceeded expectations. Delivered far beyond what was agreed upon with impeccable quality. Very helpful with demands and adjustments."
MikroTik Hotspot · 2026
"One of the most talented and dedicated professionals I have ever collaborated with. His expertise in Node.js, React.js, blockchain, and Web3 technologies is impressive. His ability to manage both front-end and back-end is remarkable."
Web3 & Blockchain projects · Amachains
"I really liked André's work. Completed on time, excellent communication, full support and even did more than expected! I would hire again without a doubt!"
WordPress Migration · 2021
"As project manager, I saw firsthand his strong technical skills and commitment as a mobile developer. He not only met all requirements but also collaborated effectively. I highly recommend André for any development role."
Museu Goeldi Digital · UFPA
"I was always impressed by his professional vision, constantly ahead of its time. André is proactive, with a clear strategic vision and a unique talent for solving complex problems with efficiency and creativity."
XIFIX Tecnologia
"Excellent professional. Service fully delivered, within the established deadline!"
WhatsApp & SharePoint Bot · 2026
"Dedicated and highly skilled in software development. His strong work ethic and ability to learn quickly stood out. He approached challenges with a problem-solving mindset, ensuring the team's success."
RNP · Blockchain Infrastructure
"Everything excellent!!"
PDF Form Filler · 2026
"His abilities as a developer have always impressed me. I followed his journey in research, during which he completed his master's in Computer Science with a focus on Blockchain. He is certainly a great professional to have on the team."
Amachains · Product Team
"Very professional and helpful."
Web Scraping · 2021
"Exercises technical leadership that inspires reaching new heights of technology and innovation."
Cross-team collaboration
"Excellent professional! Without a doubt, I recommend!"
Landing Page
"Excellent professional, exceeded expectations. Delivered far beyond what was agreed upon with impeccable quality."
MikroTik Hotspot · 2026
"One of the most talented and dedicated professionals I have ever collaborated with. His expertise in Node.js, React.js, blockchain, and Web3 technologies is impressive."
Web3 & Blockchain · Amachains
"Completed on time, excellent communication, full support and even did more than expected! I would hire again without a doubt!"
WordPress Migration · 2021
"I was always impressed by his professional vision, constantly ahead of its time. André is proactive, with a unique talent for solving complex problems with creativity."
XIFIX Tecnologia
"Excellent professional. Service fully delivered, within the established deadline!"
WhatsApp Bot · 2026
"Exercises technical leadership that inspires reaching new heights of technology and innovation."
Cross-team collaboration
What you need to know before moving forward.
Clear answers about scope, collaboration and continuity, so you can decide whether DCODER is the right partner for the project.
What kind of software does DCODER build?
Custom web applications and SaaS, AI agents and automation, ecommerce, systems integrations, APIs and cloud infrastructure.
How does a project start?
It starts with a short conversation about the problem, priorities, integrations and ideal timeline. Within one business day, you receive the recommended next step and, when the scope is clear, a written plan and estimate.
Does DCODER work with contracts and invoices?
Yes. DCODER is a Brazilian registered business, CNPJ 61.928.134/0001-61, and works with a formal contract and NF-e for Brazilian clients.
Can DCODER work with an existing product or internal team?
Yes. Engagements can cover a complete product or a focused stage such as architecture, integration, performance, automation, technical leadership or delivery support alongside your team.
Is post-launch support available?
Yes. Projects can include monitoring, maintenance, incident support and continuous product evolution after launch, according to the agreed operating model.
Initial review · reply within one business day
Strategic projects should start with the right conversation.
Share the context, priorities and current constraints. We will assess the opportunity and recommend the most appropriate next step.
Serving clients remotely worldwide