Pureza de María School
León, Nicaragua · Secondary education
2011–2016 · 5 yearsLearn, build and keep evolving.Never a master, always a student.
Full Stack .NET developer and Information Systems Engineer with more than three years of professional experience across six company and technology-project roles. I build web, mobile, SaaS and IoT solutions for business, industrial and agricultural environments. My background in software and mechatronics allows me to work from interfaces, APIs and databases to Raspberry Pi, ESP32 and automation systems operating in the field.
in progress
ACADEMIC_TIMELINE
Education, engineering and continuous learning.
National Autonomous University of Nicaragua · UNAN-León
Information Systems Engineering
2017–2023 · 6 yearsUniversidad Tecnológica La Salle · ULSA
CURRENTMechatronics and Control Systems Engineering
2023–Present · Fourth yearMaster's in Databases
Next academic goal
Coming soon...learning.log
$load academic path
✓information systems completed
›mechatronics · fourth year in progress
○database master's · next goal
Capabilities
The tools behind the systems I build.
A hands-on technology stack shaped by real software, industrial, IoT and business projects. Drag the windows to arrange the workspace.
jeremy@kali
SYS READY
WS-02┌──(jeremy㉿portfolio)-[~/skills]
DRAG WINDOWS TO REORDER
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Desktop & Enterprise
Business and industrial software development with C#, VB.NET, Windows Forms, DevExpress and GUNA. Experience building ERP and CRM systems with MVC, layered architectures and operational reporting with Crystal Reports.
C#VB.NET.NETWinFormsDevExpressGUNACrystal ReportsERP / CRM
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Frontend
Modular and responsive interfaces with React, Angular and Astro, using reusable components, maintainable structures and TypeScript. Strong foundation in JavaScript, HTML, CSS and Tailwind CSS.
ReactAngularAstroTypeScriptJavaScriptHTMLCSSTailwind CSS
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Mobile
Cross-platform applications with Flutter, Dart, Xamarin and React Native. REST API integration, local persistence, offline-first workflows and maintainable project structures.
FlutterDartXamarinReact NativeRESTOffline-first
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Backend & Architecture
REST API and backend development with ASP.NET Core and .NET, from modular monoliths to microservices. Clean Architecture, MVC, layered systems, JWT, RBAC, SignalR and multi-tenant platforms.
ASP.NET Core.NETREST APIClean ArchitectureMicroservicesJWTRBACSignalR
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Data & Databases
Database design, administration and querying with SQL Server, PostgreSQL, MySQL and SQLite. ETL processes, stored procedures, functions, subqueries, CTEs, temporary tables and query optimization.
SQL ServerPostgreSQLMySQLSQLiteETLCTEStored ProceduresSQL
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IoT & Edge Systems
IoT solutions with ESP32, Raspberry Pi, sensors and actuators. Local networks, data acquisition, remote control and real-time communication for systems deployed directly in the field.
ESP32Raspberry PiSensorsActuatorsRESTLocal NetworksRealtime
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Cloud & Deployment
Application deployment and infrastructure using Cloudflare, Supabase and AWS Lambda for serverless workloads. Experience with Docker, Git, Linux command-line environments, SSH and remote service administration.
CloudflareAWS LambdaSupabaseServerlessDockerLinuxGitSSH
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Analytics & Business Tools
Analysis, reporting and operational dashboards with Excel and Power BI. Business reporting with Crystal Reports and DevExpress Reports, plus web measurement with Google Tag Manager and Google Analytics.
ExcelPower BICrystal ReportsDevExpress ReportsTag ManagerGoogle Analytics
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Industrial Automation
Industrial control logic and automation with Siemens LOGO! Soft Comfort and TIA Portal. Integration between PLC environments, field devices and .NET applications for monitoring and process control.
LOGO! Soft ComfortTIA PortalSiemensPLCS7.Net PlusIndustrial Networks
Personal projects
Project library.
A library of technology projects I have developed for personal use, experimentation, and as solutions or services built around real needs.
Multi-tenant SaaS POS
A multi-tenant point-of-sale platform built with React, .NET and PostgreSQL. It applies Clean Architecture to centralize sales, inventory, purchasing, cash management and accounts receivable while keeping each organization's data isolated.
TECHNOLOGIES & TOOLS
React.NETPostgreSQLClean ArchitectureMulti-tenantJWT
KEY FEATURES
Open live project- Logical isolation per organization
- Modular business workflows
- Secure access with JWT and roles
Collection Management SaaS
A hybrid platform for lending and field collection operations, combining a React web portal, a .NET API and an offline-first Flutter application. Operational data is stored in a local SQL Server database and synchronized over LAN, while licenses are managed independently in PostgreSQL.
TECHNOLOGIES & TOOLS
FlutterReact.NETSQL ServerPostgreSQLOffline-first
KEY FEATURES
- Offline-first field application
- LAN synchronization with the local server
- Independent license database
Engineering Formula Catalog
A Flutter utility for organizing equations and formulas by category, saving frequently used references and performing quick calculations. SQLite provides fully local persistence for favorites, history and custom formulas.
TECHNOLOGIES & TOOLS
FlutterDartSQLiteLocal persistenceOffline
KEY FEATURES
- Searchable formula catalog
- Local favorites and history
- Quick calculations without Internet
S7-1200 Web Control Lab
An integration laboratory that connects TIA Portal and PLCSIM with NetToPLC, a .NET API and a web interface. It makes it possible to test sensors, pumps, digital inputs and outputs while validating control logic for an S7-1200 PLC before physical deployment.
TECHNOLOGIES & TOOLS
TIA PortalPLCSIMNetToPLC.NET APIS7-1200Industrial I/O
KEY FEATURES
- Remote activation of sensors and pumps
- Digital input and output testing
- Safe validation of PLC logic
Experience
Building software inside real businesses.
Professional experience across startups, manufacturing, industrial operations, business systems, automation and connected IoT infrastructure.
01
export const experience = {
02
company: "AgroTronic S.E.",
03
role: "Software & IoT Integration Developer / Co-founder",
04
period: "Nov 2025 — Present",
05
location: "Ciudad Darío, Matagalpa, Nicaragua",
06
summary: "End-to-end software and IoT solution development for agricultural operations, combining mobile applications, REST APIs, administrative platforms and autonomous edge infrastructure.",
07
contributions: [
08
"Designed and implemented a distributed client-server IoT architecture, building RESTful APIs with ASP.NET Core .NET 8, a Flutter/Dart mobile application and MySQL persistence, integrating ESP32 and Raspberry Pi devices for sensor acquisition, monitoring and real-time actuator control.",
09
"Developed services for irrigation traceability, production cycles, system states and events, implementing .NET Background Services and real-time communication through SignalR to enable automatic updates without interface reloads.",
10
"Configured and administered autonomous local infrastructure on Raspberry Pi and Linux, integrating the application server, database, local network, router and Wi-Fi access point to guarantee offline operation without dependency on external services.",
11
"Developed an administrative web platform with ASP.NET Core MVC and PostgreSQL for inventory, Bill of Materials (BOM), CRM, finance, projects, payments, reports and invoicing, centralizing the company’s operational and administrative processes.",
12
"Designed, developed and deployed the corporate landing page using Astro and Tailwind CSS, configuring delivery through Cloudflare and traffic measurement with Google Tag Manager and Google Analytics.",
13
],
14
technologies: [
15
".NET 8""ASP.NET Core""MVC""Flutter""Dart""SignalR""Background Services""MySQL""PostgreSQL""ESP32""Raspberry Pi""Linux""Astro""Tailwind CSS""Cloudflare""Google Tag Manager""Google Analytics"
16
]
17
}
TSRemoteStartupCiudad Darío, Matagalpa, Nicaragua
01
export const experience = {
02
company: "DemeTECH Corporation",
03
role: "Programming Technician",
04
period: "Mar 2025 — Jul 2026",
05
location: "Managua, Nicaragua",
06
summary: "Software development and technical support for industrial operations, working with ERP systems, databases, web applications, ETL processes, production monitoring and automation.",
07
contributions: [
08
"Maintained and supported an industrial desktop ERP built with an N-Layer architecture using VB.NET, Windows Forms, DevExpress and Azure SQL, developing reports, module integrations and data processes for business operations.",
09
"Optimized SQL queries and processes using CTEs, temporary tables, functions and stored procedures, significantly reducing processing times and eliminating database-load timeout errors.",
10
"Improved the packaging-label generation flow of a desktop application integrated with Adobe InDesign and the database, dynamically generating barcodes, QR codes, Data Matrix, Code 128 and EAN-13 labels to improve process scalability.",
11
"Supported the migration and consolidation of two databases into one through an ETL process, improving information centralization and availability.",
12
"Developed three web solutions with REST APIs in ASP.NET and Angular frontends for maintenance/ticket control, IT supplies inventory and transfer packing lists with label generation and scanning.",
13
"Contributed to web-application containerization using Docker.",
14
"Designed the electrical diagram in Cade Simu and implemented a Siemens LOGO! PLC system for monitoring, process control and production counting, integrated with an API to reflect production flow in real time.",
15
],
16
technologies: [
17
"VB.NET""Windows Forms""DevExpress""Azure SQL""SQL""CTEs""Temporary Tables""Stored Procedures""ETL""ASP.NET""Angular""Docker""Adobe InDesign""Siemens LOGO!""Cade Simu""QR / Data Matrix / EAN-13"
18
]
19
}
TSOn-siteIndustrial companyManagua, Nicaragua
01
export const experience = {
02
company: "Yazaki Nicaragua [P5]",
03
role: "Software Developer",
04
period: "Jul 2024 — Mar 2025",
05
location: "León, Nicaragua",
06
summary: "Software development for manufacturing operations, focused on supply flow, quality, operator control and operational calculations for production supervision.",
07
contributions: [
08
"Implemented a supply system for KoMAX cable-cutting machines with Windows Forms (VB.NET) and SQL Server, mapping internal database information to anticipate the next required cable type and facilitate requests to the supply department.",
09
"Digitized the final quality-inspection checklist (Firewall) through a desktop system using Windows Forms and SQL Server, incorporating images and critical points by line, reducing manual completion time by 70% and decreasing the bottleneck of products pending review.",
10
"Developed a desktop system in Windows Forms and SQL Server for operator control by line using employee cards, attendance and certification records, facilitating absence detection and rapid personnel reassignment.",
11
"Developed a Xamarin mobile application for supervisors with operational calculations based on production KPIs, including downtime and hourly production.",
12
],
13
technologies: [
14
"VB.NET""Windows Forms""SQL Server""Xamarin""KoMAX""KPIs""Quality Control""Production Operations"
15
]
16
}
TSOn-siteManufacturingLeón, Nicaragua
01
export const experience = {
02
company: "Alpha Technology",
03
role: "Junior Web Developer",
04
period: "Mar 2024 — Jul 2024",
05
location: "León, Nicaragua",
06
summary: "Web development, business-process digitization and internal infrastructure support for a technology-services company.",
07
contributions: [
08
"Developed and deployed a corporate landing page with Astro, Tailwind CSS, HTML5 and JavaScript to promote the company’s services, deploying it on Netlify.",
09
"Digitized collections and due-date tracking through an AppSheet mobile application integrated with Google Sheets, synchronizing client and payment information and helping the supervisor monitor employees and sales.",
10
"Provided support for network connections and switch configuration to ensure continuity of the internal infrastructure.",
11
],
12
technologies: [
13
"Astro""Tailwind CSS""HTML5""JavaScript""AppSheet""Google Sheets""Netlify""Switching""Networking"
14
]
15
}
TSHybridTechnology servicesLeón, Nicaragua
01
export const experience = {
02
company: "Ferretería Luz",
03
role: "Junior Desktop Developer",
04
period: "Aug 2023 — Dec 2023",
05
location: "El Viejo, Chinandega, Nicaragua",
06
summary: "Development, configuration and deployment of a desktop ERP adapted to the operational needs of a hardware-store business.",
07
contributions: [
08
"Developed, configured and deployed a basic desktop ERP using C#, Windows Forms (GUNA plugin), an N-Layer design pattern and MySQL, covering invoicing, inventory, returns, delivery notes and purchasing.",
09
"Implemented dynamic purchasing and Kardex inventory reports and charts, customized according to the client’s requirements, improving stock visibility and operational decision-making.",
10
"Configured a thermal printer for generating customized company invoices.",
11
],
12
technologies: [
13
"C#""Windows Forms""GUNA""MySQL""N-Layer""Kardex""Reporting""Dynamic Charts""Thermal Printing"
14
]
15
}
TSRemoteProject-based contractEl Viejo, Chinandega, Nicaragua
01
export const experience = {
02
company: "CUKRA Industrial S.A.",
03
role: "Junior Developer",
04
period: "Jul 2022 — Dec 2022",
05
location: "León, Nicaragua",
06
summary: "Desktop-software and database-solution development for quality control, raw-material management and industrial operations.",
07
contributions: [
08
"Developed a desktop system in C# (Windows Forms, DevExpress) and SQL Server for the quality-control evaluation process, reducing data-capture time by 50% through reports and dynamic charts that improved result tracking and registration.",
09
"Centralized out-of-standard damage and contamination information in a database, incorporating automated calculations to speed up analysis.",
10
"Supported the development of a desktop system in Windows Forms for stock and raw-material control in the operations area, creating functional modules and stored procedures in SQL Server.",
11
"Performed preventive maintenance on PCs and printers and provided support in router-connection installation and RJ45 Cat 5 network-cabling assembly.",
12
],
13
technologies: [
14
"C#""Windows Forms""DevExpress""SQL Server""Stored Procedures""Quality Control""Reporting""RJ45 Cat 5""Technical Support"
15
]
16
}
TSOn-siteProfessional internshipLeón, Nicaragua
Certifications
Continuous technical development.
Training in databases, data analysis, business intelligence, cybersecurity, artificial intelligence and agile practices.
Universidad Autónoma de Nicaragua - UNAN León
SQL Server: Database Administrator
Edutin Academy
SQL Server
W|E · Microsoft Partner Network
Applied Power BI
W|E · Microsoft Partner Network
AWS Fundamentals
Commit Academy
SQL Intermediate
Sololearn
Python, AI and Cybersecurity Applied to Industry
IngeLearn
SCRUM Fundamentals
AICS
Introduction to Cybersecurity
Cisco Networking Academy
Contact
Let's build something useful.
Have a software product, IoT system or engineering problem worth solving? Let's talk.