// hello world
I'm Daryll
10+ years building and modernizing web applications, APIs, and cloud-based services across fintech, retail, and enterprise platforms.
// 02. about me
Crafting Code
With Purpose
I'm a software engineer with 10+ years of experience designing and delivering production-grade applications across fintech, retail, and enterprise platforms. I thrive at the intersection of clean architecture, developer experience, and measurable business impact — from high-throughput POS systems and security-critical banking portals to GraphQL-driven integration layers and automated cloud data pipelines.
daryll.profile.json
$ git log --oneline --since="10 years ago"
✓ Fintech · Retail · Enterprise · Telco
// 03. tech stack
What I Work With
Frontend
Backend & APIs
Databases
Cloud & DevOps
Testing & Tools
// 04. experience
Work History
Software Engineer
Global IT Consulting Company
Project: Network Management Application
- ▸Built and maintained Apache Airflow DAGs that consumed GraphQL query results and synchronized data to a local MongoDB cache, improving data availability and enabling faster UI access
- ▸Designed GraphQL queries and APIs as an integration layer between ServiceNow and internal applications, simplifying data access and reducing direct system dependencies
- ▸Migrated services from proprietary applications to third-party platforms and APIs while preserving compatibility with existing integrations and workflows
- ▸Automated local environment setup with shell scripts and Docker containers, enabling new engineers to establish functional development environments within their first week of receiving access
- ▸Mentored engineers working with distributed services and created reusable command-line automation that reduced repetitive operational work
Software Engineer
Global Retail Technology Company
Project: Enterprise POS System – APMEA Region
- ▸Improved frontend load performance by up to 30% through component-level code splitting, lazy-loading of routes and assets, and JavaScript bundle size reduction — directly reducing time-to-interactive for POS deployments across the APMEA region
- ▸Enabled successful regional market expansion by delivering localized UI components with RTL support and i18n for Arabic and Spanish, making the POS system production-ready for new markets
- ▸Reduced regression defect rates by establishing comprehensive E2E test coverage using Cypress and Cucumber across diverse POS hardware configurations
- ▸Raised codebase quality and reduced review turnaround time by conducting structured peer code reviews, enforcing scalable and testable patterns
Software Engineer & Scrum Lead
Financial Services Company
Project: Digital Banking Platform
- ▸Spearheaded the frontend migration from Java/Angular to Node.js + Next.js with SSR, transforming a monolithic codebase into modular, reusable components and delivering measurable performance and SEO gains
- ▸Designed and implemented a microservice-based backend architecture, improving service isolation and enabling independent scaling of critical banking workflows
- ▸Strengthened application security by implementing JWT-based authentication and integrating Azure Key Vault for secrets management, eliminating hardcoded credentials
- ▸Streamlined build, test, and deployment workflows by setting up Jenkins CI/CD pipelines, cutting manual release effort and enabling more frequent, reliable deployments
Engineer
Consumer Electronics Company
Project: Enterprise Device Management Portals
- ▸Significantly improved page performance and developer experience by migrating three enterprise portals from PHP/Drupal to Node.js + Next.js, reducing backend complexity and achieving faster load times
- ▸Broadened product accessibility and compliance by implementing WCAG-compliant improvements — keyboard navigation, ARIA roles, semantic HTML — ensuring the platform was usable by a wider global audience
- ▸Expanded market reach by delivering seamless multilingual support via i18n and GeoIP-based language detection across key regions
- ▸Boosted organic search visibility through SSR, structured metadata, and optimized routing for marketing and developer-facing pages
Software Engineer
Financial Trading Company
- ▸Modernized the stock order management system by migrating from Python-Django + PostgreSQL to the MERN stack, delivering a more interactive UI with React and real-time capabilities via Node.js
- ▸Achieved approximately 40% improvement in query response time for document-heavy workloads by migrating from PostgreSQL to MongoDB, enabling a more flexible schema for evolving market data
- ▸Accelerated market data processing by developing a custom parser to transform raw stock exchange feeds into structured, actionable insights consumed by the trading platform
- ▸Improved system responsiveness through asynchronous data loading, lazy-loading modules, and non-blocking I/O, resulting in a faster, more fluid trading experience
Web Developer
Telecommunications Company
- ▸Strengthened API security for the company's virtual PBX system by developing a RESTful API with JWT-based authentication (access/refresh tokens), HTTPS enforcement, CORS policy, and rate limiting — reducing attack surface and ensuring regulatory compliance
Software Engineer
Mobile Gaming & Tech Company
- ▸Improved client support responsiveness by building a real-time web + SMS communication platform using PHP Laravel and third-party SMS APIs, enabling faster response times
- ▸Ensured uninterrupted SMS service delivery by developing a failover SMS API system that automatically rerouted traffic during provider outages, maintaining business continuity
- ▸Improved data performance and schema flexibility by migrating legacy data from MySQL to MongoDB, ensuring integrity through careful field mapping and transformation
// 05. projects
Things I've Built
Featured projects and open-source work.
Section Under Construction
I'm currently working on documenting my projects and preparing case studies. Check back soon to see what I've been building!
// 06. contact
Let's Work Together
I'm open to new opportunities, collaborations, and interesting projects. My inbox is always open.