Allan Castrence
Senior Software Engineer | 8+ Years Experience
Currently working on Full-Stack focused on AI, ASP.NET, Blockchain Web3 and Mobile projects for clients remotely. Available for premium work.
Professional Journey
Transforming complex business challenges into elegant software solutions across healthcare, fintech, and enterprise domains
Years of Experience
Building enterprise-grade solutions
Junior Developer
Started Career
Software Engineer
Nuxify Inc.
Senior Developer
DAV Philippines
Senior Software Engineer
Healthera London
Last Role
Senior Software Engineer at Healthera
Led the development of enterprise healthcare solutions for a London-based technology company, designing scalable systems used across the UK healthcare ecosystem. Built and integrated AI-driven capabilities while ensuring full compliance with HIPAA and industry security standards.
50K+
Active Users
99.9%
Uptime SLA
15+
Integrations
Core Competencies
Mastery across modern technology stack with proven track record in enterprise-scale implementations
Full-Stack Development
Web Development
10+ enterprise applications
AI Agents & ML
Artificial Intelligence
2+ AI-powered features
Blockchain Development
Web3 & Crypto
3+ DeFi applications
ASP.NET Core
Backend Framework
5+ enterprise APIs
Java & Spring Boot
Backend Framework
5+ microservices
Python & Django
Backend Framework
10+ data-driven apps
Technology Stack
Career Timeline
Progressive career growth from developer to senior engineer with measurable impact at every stage
Healthera
Senior Software Engineer
Leading development of enterprise healthcare solutions serving 50,000+ users across UK healthcare ecosystem
Key Achievements
- Architected microservices infrastructure reducing API response time by 60%
- Implemented AI-driven prescription management system processing 10K+ daily transactions
- Led team of 5 developers in agile environment with 99.9% uptime SLA
- Established CI/CD pipeline reducing deployment time from 4 hours to 15 minutes
Technologies Used
Notable Projects
Patient Portal Redesign
Complete overhaul of patient-facing application with modern UI/UX
Impact: 40% increase in user engagement, 25% reduction in support tickets
Pharmacy Integration Hub
Real-time integration with 500+ pharmacies across UK
Impact: Processing 15K+ prescriptions daily with 99.95% success rate
DAV Philippines
Senior Developer
Developed fintech solutions and blockchain applications for international clients
Key Achievements
- Built DeFi platform handling $2M+ in daily transactions
- Implemented smart contracts with zero security vulnerabilities
- Reduced transaction processing time by 75% through optimization
- Mentored 3 junior developers in blockchain development
Technologies Used
Notable Projects
Crypto Trading Platform
Real-time cryptocurrency trading with advanced charting
Impact: 5,000+ active traders, $50M+ trading volume
NFT Marketplace
Full-featured NFT minting and trading platform
Impact: 10,000+ NFTs minted, 2,000+ active users
Nuxify Inc.
Software Engineer
Developed web applications and mobile solutions for diverse client portfolio
Key Achievements
- Delivered 15+ client projects with 100% on-time completion rate
- Implemented responsive designs supporting 10+ device types
- Reduced application load time by 50% through optimization
- Established coding standards adopted company-wide
Technologies Used
Notable Projects
E-commerce Platform
Full-stack e-commerce solution with payment integration
Impact: 1,000+ daily orders, 99.8% payment success rate
Inventory Management System
Real-time inventory tracking for retail chain
Impact: 30% reduction in stock discrepancies
Education & Credentials
Strong academic foundation in computer science with continuous professional development
Bachelor of Science in Computer Science
University of Batangas
Relevant Coursework
Academic Highlights
- Dean's List - 6 consecutive semesters
- Best Capstone Project Award - E-commerce Platform
- Programming Competition Winner - Regional Level
Professional Certifications
AWS Certified Solutions Architect
Amazon Web Services
2023
Microsoft Certified: Azure Developer
Microsoft
2022
Certified Blockchain Developer
Blockchain Council
2021
Oracle Certified Java Programmer
Oracle
2020
Project Portfolio
Showcasing enterprise-grade solutions with measurable business impact and technical excellence
Healthera Patient Portal
Enterprise healthcare platform serving 50,000+ patients across UK with real-time prescription management, appointment scheduling, and medical records access.
DeFi Trading Platform
Decentralized finance platform enabling cryptocurrency trading with advanced charting, real-time market data, and secure wallet integration.
NFT Marketplace
Full-featured NFT minting and trading platform with smart contract integration, royalty management, and IPFS storage.
E-commerce Platform
Scalable e-commerce solution with payment gateway integration, inventory management, and real-time order tracking.
AI Chatbot Assistant
Intelligent chatbot powered by natural language processing for customer support automation with multi-language support.
Payment Gateway Integration
Secure payment processing system with multi-currency support, fraud detection, and PCI DSS compliance.
Client Testimonials
Trusted by industry leaders and innovative startups for delivering exceptional results
"Allan transformed our healthcare platform with exceptional technical expertise. His ability to architect scalable solutions while maintaining code quality is outstanding. The patient portal he built now serves 50,000+ users with 99.9% uptime."
Michal Wrochna
CEO
Stacash
All testimonials verified on LinkedIn
Pricing & Consultation
Transparent pricing with flexible engagement models to fit your project needs
Consultation
$25/hour
₱1,400/hour
- Technical consultation
- Code review
- Architecture planning
- Technology recommendations
- Best practices guidance
Development
$30/hour
₱1,700/hour
- Full-stack development
- API integration
- Database design
- Testing & QA
- Documentation
- Code deployment
Enterprise
$40/hour
₱2,200/hour
- All Development features
- Architecture design
- Team leadership
- DevOps setup
- Performance optimization
- Security audit
- 24/7 support
Project Cost Estimator
Estimated Project Cost
$8,000 - $15,000
Final cost depends on specific requirements and complexity
Free 30-Minute Consultation
Discuss your project requirements, get technical recommendations, and receive a detailed proposal
Start Your Project
Let's discuss how I can help bring your vision to life with expert software engineering
Project Inquiry Form
Contact Information
Location
Pampanga, Philippines
Available for remote work worldwide
Availability
Available for new projects
Response time: Within 24 hours