Apps Cristãos
A family of Christian apps — Bible, hymnal, lesson, study and devotional resources for churches, families and people seeking biblical reading and spiritual practice.
Praia Grande · Brazil
I build systems that have to survive the real world.
Senior software engineer with 14 years on the clock. Rails and backend at scale, my own products past 100k downloads, and a second life writing and speaking for the community.
Numbers that matter
14+years in engineering
100K+Play Store downloads
24K+public reviews
30+published articles
4TDC talks
200+engineers interviewed
Now
Engineering at Topia, on global mobility. Interviewing at Nexton. After hours I ship apps through AKlaus Tecnologia and keep the Christian app family that has passed 100k installs.
What I actually do
I modernize legacy Rails without a downtime circus.
I get product out the door — web, Android, and iOS when it earns it.
I mentor, interview and write. Engineering is also conversation.
Brands
AKlaus Tecnologia
A personal studio for turning ideas into apps and websites — on Play Store and the App Store. Health, finance, sports, games, productivity and AI.
Allan Klaus
The first Play Store publisher account, where the Adventist Bible and the multilingual hymnal started to grow.
Featured products
All appsBíblia Adventista
A complete Bible with hymnal, weekly lesson, meditations, Ellen White books, studies and a virtual pastor. The widest-reaching app I have shipped.
Adventist Bible
International edition with multiple translations, a version comparer, hymnals and Hope Channel.
MindGarden
Emotional journal, mood charts, guided micro-therapies and a space to talk things through.
Alocação Inteligente
A finance app for investors: asset performance, portfolio growth, holdings and dividend tracking, calculators, and an AI assistant for analysis and decisions that match the investor profile.
Pieces that still hold
All articles6 Ruby tips you should know
Published on iMasters. Six Ruby and Rails shortcuts for daily work — following the PHP piece readers already liked.
Why contribute to open-source projects
Published on iMasters and selected in the 2018 Best of the Year series, Open Source category. A way into large codebases — and into working with people better than you.
On stage
All talksBoost your career with open-source projects
Diversity, Accessibility and Careers Lounge
Monitor and guarantee your application’s quality
DevOps Tools track