Alexander Marra Moncks
Tech Lead / Full Stack Developer
Senior Full Stack Developer
25+ years building enterprise web applications using .NET Core and Angular. Recently delivered solo full-stack project achieving 85%+ test coverage and zero critical bugs in 6 months.
25+
Years Experience
50K+
Users Served
$670K+
Annual Savings
99%+
Avg Uptime
38+
Projects Delivered
85%+
Test Coverage
Quick Highlights
- 🎯 CSN Project: 500+ users, 99.6% uptime, $285K total savings
- 🎯 J&J Big Data: 54 data sources, $2.1M revenue impact, 99.7% reliability
- 🎯 Via Varejo: 15,000+ users, $18M incremental revenue, 40% warranty increase
- 🎯 Honda Connected Car: 5,000+ vehicles, 99.8% uptime, IoT platform
- 🎯 Tech Stack: .NET Core 8, Angular 18, RXJS, Azure DevOps, SQL Server
Skills Cloud
Interactive visualization of my core technical competencies. Larger = More experience.
.NET Core 8 Angular 18 C# TypeScript RXJS SQL Server Azure DevOps Entity Framework REST APIs Microservices Git TDD Agile/Scrum Jest xUnit Moq Docker Kubernetes Oracle PostgreSQL Redis CI/CD SOLID DDD CQRS Postman Power BI Hadoop Spark Python Java Spring Boot Node.js Xamarin React SASS/CSS3 OAuth 2.0 JWT SAFe 5
Career Timeline
Ago 2024 - Fev 2025
Senior Full Stack Developer
Stefanini | CSN Industrial Platform
Solo-developed complete full-stack solution: 26 RESTful APIs (.NET Core 8), 40+ Angular 18 components, Azure DevOps CI/CD with 85%+ test coverage. serving 500+ users with 99.6% uptime.
$285K Savings 99.6% Uptime 0 Critical Bugs
Nov 2023 - Ago 2023
Product Developer
Fale Paco | Remote Team
Architected products for financial, telecom and clients, and specific solutions using N8N for Coca-Cola.
15+ Microservices 45% Incident Reduction
Feb 2022 - Nov 2023
Senior Software Engineer
AgileEngine | Distributed Teams
Architected 15+ microservices using .NET Core 6 and Azure. Mentored 8-12 engineers on clean code, TDD, and API design. Reduced production incidents by 45%, improved velocity by 28%.
15+ Microservices 45% Incident Reduction
Nov 2020 - Dec 2022
Senior Developer
Stefanini | Honda Connected Car
Contributed to IoT platform for 5,000+ connected vehicles. Implemented circuit breaker patterns, OAuth 2.0, Redis caching reducing API response time by 72% (340ms to 95ms).
5,000+ Vehicles 99.8% Uptime 72% Response Improvement
Apr 2019 - Oct 2020
Senior Developer
Stefanini | Via Varejo Rewards Platform
Built enterprise rewards system for 15,000+ sales associates across 600+ stores. Achieved 40% warranty increase and 25% high-margin sales boost contributing $18M revenue.
$18M Revenue Impact 15,000+ Users 2M+ Daily Transactions
Mar 2017 - Dec 2019
Senior Full Stack Developer
Stefanini | Johnson & Johnson
Delivered 4 mission-critical healthcare solutions including Blue Amazon Big Data platform (54 data sources, 99.7% reliability), generating $2.1M additional revenue.
$2.1M Revenue 54 Data Sources $350K Savings
Jun 2011 - Present
Founder & Principal Developer
MMSoft Digital
Founded digital consultancy serving 20+ clients. Created proprietary LMTagScript language generating $180K licensing revenue. Revenue growth: $180K → $520K (189% increase).
$520K Revenue 92% Retention 95% Success Rate
Key Projects
🏭 CSN Industrial Platform
Jan 2024 - Mar 2025 | Stefanini
Solo full-stack delivery: .NET Core 8 backend (26 APIs), Angular 18 frontend (40+ components), 85%+ test coverage. Delivered .
$285K Savings 99.6% Uptime 500+ Users
📊 Blue Amazon Big Data
Aug 2018 - Dec 2019 | J&J
Lambda Architecture consolidating 54 data sources across 12 countries. Hadoop, Spark, Talend ETL processing 200GB+ daily.
$2.1M Revenue 54 Sources 99.7% Reliability
🎁 Via Varejo Rewards
Apr 2019 - Oct 2020 | Stefanini
Enterprise rewards platform for 15,000+ sales associates. .NET Core 3.1, CQRS, processing 2M+ daily transactions.
$18M Revenue 40% Warranty Increase 15,000+ Users
🚗 Honda Connected Car
Nov 2020 - Dec 2022 | Stefanini
IoT platform for remote vehicle control. Java Spring Boot, Kubernetes, OAuth 2.0, serving 5,000+ vehicles with 99.8% uptime.
5,000+ Vehicles 99.8% Uptime 2.5M+ Monthly Requests
📱 Bariatrics Mobile App
Mar 2017 - Jul 2018 | J&J
Xamarin cross-platform app for 200+ medical reps. 82% code sharing, 50K+ monthly sessions, 4.6★ rating.
$120K Savings 50K+ Sessions 4.6★ Rating
🤖 LMTagScript Language
2023 - Present | MMSoft Digital
Proprietary scripting language for LLM guardrails and prompt engineering. 2,400 LOC Python-based parser, 40-page documentation.
$180K Licensing 3 Enterprise Clients 50% Faster Deployment
Career Achievements
💰 Business Impact
- ✓ $670K+ annual cost savings documented across clients
- ✓ $30M+ in incremental revenue and cost reductions
- ✓ 75% average manual workload reduction
- ✓ 20+ FTE positions eliminated through automation
🎯 Technical Excellence
- ✓ 38+ production projects delivered
- ✓ 95% on-time/on-budget success rate
- ✓ 85%+ average test coverage (TDD)
- ✓ 99%+ average uptime across all systems
🚀 Innovation
- ✓ Created LMTagScript proprietary language
- ✓ 40% faster delivery with AI-assisted development
- ✓ Pioneered AI integration services ($240K ARR)
- ✓ 60% development time reduction via low-code
👥 Leadership & Mentoring
- ✓ Mentored 15+ engineers (8 promoted to senior/lead)
- ✓ 100% team retention on managed projects
- ✓ Trained 50+ engineers on DevOps practices
- ✓ Established hiring standards adopted company-wide
⚡ Process Improvement
- ✓ 70% deployment time reduction via CI/CD
- ✓ 65% production incident reduction
- ✓ 30% team velocity improvement (Agile)
- ✓ 11x deployment frequency increase
🏆 Certifications
- ✓ SAFe 5 Certified (Scaled Agile Framework)
- ✓ DevOps Essentials Professional Certificate
- ✓ MBA Executive in Administration (FGV)
- ✓ Empretec Entrepreneurship (Sebrae)
Let's Connect
Open to exciting opportunities in Full Stack Development, Technical Leadership, and Software Architecture. Let's build something amazing together!
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Quick Facts
Location
📍 São José dos Campos, SP, Brazil
Experience
⏱️ 25+ Years
Languages
🌎 Portuguese (Native), English (Fluent)
Availability
✅ Open to Opportunities
Areas of Expertise
Full Stack Development Microservices Architecture Cloud Solutions (Azure, AWS) DevOps & CI/CD Big Data & Analytics AI Integration Enterprise Software Mobile Development Technical Leadership Agile/Scrum