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William.

Senior AI Software Engineer

William Moreira da SilvaSenior AI Software Engineer | Software Architecture | AWS

I work with intent: I understand the problem, keep the purpose in sight, and build solutions with real impact.
Professional photo of William
years of software engineering
11+
professionals mentored
75+
fewer merge conflicts
−60%
legal document production time
−50%

About me

Engineering with purpose, leadership with presence

My journey spans over 11 years in software engineering, evolving from hands-on implementation to architecture, technical leadership, and building AI-powered products. Along the way, I helped reduce integration conflicts across teams by 60%, mentored more than 75 professionals, and led solutions that cut legal document production time by up to 50%. What drives me is understanding the problem behind the request and connecting the right technology to business goals. As a leader, I believe in bringing strategy and execution closer together, developing people, and growing new leaders who can multiply knowledge and deliver sustainable results.

From tailored solutions to enterprise platforms, the thread is the same: understand the problem before building.

Leadership principles

  1. 01Purpose before execution

    Understand the problem and the why before deciding how to solve it.

  2. 02Building together

    Solve complex problems alongside the team, valuing different perspectives.

  3. 03Bridging business and technology

    Translate strategic goals into clear priorities for execution.

  4. 04Developing people

    Teach, share knowledge, and prepare professionals to take on bigger challenges and become new leaders.

  5. 05Long-term vision

    Make sustainable decisions without trading quality and future evolution for short-term results.

Experience

Experience in software architecture and AI

AI Engineer · Lunar IA

Jul 2026 — Present · Remote
  • Lead the architecture and development of AI-powered products and intelligent automation solutions, connecting AI capabilities with real-world business processes.
  • Architected and led the implementation of an AI-powered legal solution that reduced legal document production time by up to 50% through process automation and intelligent document workflows.
  • Architected and led the development of an AI-powered virtual SDR for dental clinics, automating lead qualification, scheduling, and commercial follow-up while reducing response time and increasing conversion rates.
  • Designed an event-driven legal application integrating RPA and automated research workflows to support legal and case-law discovery and automated document generation.
  • Architected and implemented a serverless Legal RAG platform on AWS, using Amazon Bedrock, Python, AWS Lambda, Amazon S3, PostgreSQL and pgvector to ingest, chunk, embed and semantically retrieve content from legal books, generating context-grounded responses with document and page-level citations.
  • GenAI
  • RAG
  • AWS
  • Serverless
  • Golang
  • Event-driven architecture
  • Python
  • Bedrock
  • Lambda
  • pgvector
  • n8n

Senior Software Developer · Compass.UOL

Sep 2024 — Jun 2026 · Remote
  • Engineered enterprise digital products for clients including Vivo, Hospital Albert Einstein, and Poliedro, working across backend engineering, cloud-native architecture, AI-assisted development, frontend, and data technologies.
  • Designed and evolved cloud-native solutions on AWS using serverless architectures and Infrastructure as Code with Terraform, contributing to scalable and maintainable production systems.
  • Led engineering quality initiatives by establishing linting standards, automated testing practices, and Clean Code guidelines, reducing integration conflicts by 60%.
  • Served as a technical reference through code reviews, mentoring, and engineering enablement, supporting the development of more than 75 software engineers.
  • Contributed to architectural and technical decisions across distributed applications using Node.js/NestJS, React, SQL/NoSQL databases, and AWS services.
  • AWS
  • Terraform
  • Python
  • Node.js
  • NestJS
  • React
  • SQL/NoSQL
  • Mentoring
  • Code Review

Senior Software Engineer · Btime

Nov 2020 — Jul 2024 · Remote
  • Engineered and evolved a SaaS platform focused on backend systems, distributed architectures, cloud technologies, and scalable software services.
  • Contributed to microservices architectures that improved domain decoupling and enabled independent evolution of business capabilities.
  • Designed and implemented distributed applications across multiple technology stacks, including Elixir, React, React Native, GraphQL, and SQL.
  • Improved engineering reliability through code reviews, automated testing, continuous delivery, and API-based system integrations.
  • Elixir
  • React
  • React Native
  • GraphQL
  • SQL
  • Microservices

Projects

From Problem to Product

Solutions I architected as an independent engineer, from diagnosis to delivery.

2024Independent engineering

Coingems

Project lead, developer and architect

I designed and built Coingems, a news platform for cryptocurrency investors available on Android and iOS. I led the technical direction and the communication between multidisciplinary teams, ensuring integration across every component of the solution.

Outcome

I designed and implemented the core features, improving the user experience and the efficiency of delivering crypto news.

  • Android
  • iOS
  • React
  • Expo
  • Next.js
  • Firebase
  • AWS
2022Independent engineering

Refresca Cuca

Project lead, developer and architect

I led the creation of Refresca Cuca, an application built to streamline post-sales processes and boost sales for companies in the screen printing industry. I worked directly with stakeholders and led a team of three, including two front-end developers.

Outcome

I drove the development of a robust system that significantly improved post-sales efficiency for the companies it served.

  • Web
  • React
  • Elixir
  • GraphQL
  • PostgreSQL
  • Heroku
2020Personal project

Sonata — Schedule for Violinists

Developer and architect

I conceived and built Sonata from scratch, in partnership with a violin teacher. The app, formerly available on Google Play, helped violinists organize their practice sessions and track the evolution of their technique.

Outcome

I built an intuitive, tailor-made mobile app for the violin community, bringing technology and music together.

  • Android
  • Flutter

Shall we build something together?

Have a problem that deserves a purposeful solution? Let's talk.

Get in touch

Skills

What I do best

Artificial Intelligence

  • Generative AI
  • LLMs
  • RAG
  • AI agents
  • Embeddings
  • Vector search
  • Prompt engineering
  • Intelligent automation
  • Amazon Bedrock
  • n8n
  • AI-assisted software engineering

Backend & languages

  • Python
  • Elixir
  • TypeScript
  • JavaScript
  • Node.js
  • NestJS
  • Go
  • Java

Architecture & engineering

  • Software architecture
  • System design
  • Distributed systems
  • Microservices
  • Event-driven architecture
  • REST APIs
  • GraphQL
  • Cloud-native
  • Serverless

Cloud & infrastructure

  • AWS
  • Lambda
  • Bedrock
  • S3
  • API Gateway
  • Terraform
  • Infrastructure as Code
  • CI/CD

Data

  • PostgreSQL
  • pgvector
  • SQL
  • MongoDB

Leadership & business

  • Technical leadership
  • Architectural decision-making
  • Connecting strategy to execution
  • Mentoring
  • Developing professionals
  • Engineering quality
  • Clean Code
  • Automated testing
  • Code review
  • Products driven by real problems

Community

Mentoring, talks & projects

Multiplying knowledge is part of the job: mentorships, internal tech chapters, talks, and university outreach.

  • Mentoring

    Scrum Master — Scholarship Program

    Compass.UOL

    Team coaching, software engineering, best practices, code quality, technical decision-making, and career growth.

    Date
    2025 - 2026
    Audience
    75+ software professionals supported through mentoring, code reviews, and technical guidance
  • ChapterParts 1 & 2

    Elixir

    Compass.UOL

    Elixir fundamentals and applications

    Date
    2025
    Audience
    60+ employees
  • ChapterParts 1, 2 & 3

    Event-Driven Architecture (EDA) with AWS

    Compass.UOL

    Event-driven architecture on AWS

    Date
    2026
    Audience
    60+ employees
  • Talk

    Functional Programming with Elixir and the BEAM Concurrency Model

    IX Academic Week of Engineering and Technology (SAET)

    Date
    2025
    Audience
    students and academic community
  • Workshop

    Distributed & Serverless Architecture on AWS

    X Academic Week of Engineering and Technology (SAET)

    Concepts and applications of distributed architecture and serverless computing with AWS services.

    Date
    2025
    Audience
    students and academic community
  • Outreach

    Digital Document Signer

    UTFPR

    A technology solution for digital document signing, built in Java.

    Date
    2025

Want to invite me to speak or mentor?

Sharing knowledge is part of what I do. Tell me about your event or team.

Get in touch

Education

Education & certifications

  1. Executive MBA in Leadership and Strategic Negotiation

    Descomplica Faculdade Digital

    expected: Nov/2026In progress

  2. Technology Degree in Internet Systems

    UTFPR

    2026

  3. B.Sc. in Computer Engineering

    Descomplica Faculdade Digital

    2026

  4. AWS Certified Developer – Associate (DVA-C02)

    Amazon Web Services

    Verify credential
    2025AWS Certification

  5. Technical Degree in Computer Networks

    SENAI-PR

    2015

Beyond the code

What moves me outside of tech

Outside of technology, I enjoy exploring interests that combine learning, discipline, and artistic expression. I go hiking, I have an interest in classical music and instruments such as violin and cello, and I appreciate traditional calligraphy with pen and inkwell. I'm curious about learning new things and exploring different fields.

Hiking

Walking trails and landscapes — discipline, endurance, and time in nature.

Classical music

An interest in classical music and instruments such as violin and cello.

Where music became code: meet Sonata →

Calligraphy

The art of traditional writing with pen and inkwell — precision and patience.

Contact

Shall we build something with purpose?

Open to opportunities, projects, mentoring, and talks. Pick whichever channel you prefer.

Download résumé (PDF)