Full-stack Software and Database Engineer
Las Vegas, NV | steven.tomlinson@gmail.com |
steventomlinson.dev
github.com/steven-tomlinson | https://github.com/lockb0x-llc

Hands-on Full Stack Developer with 20+ years of experience delivering and maintaining enterprise .NET applications across finance, healthcare, government, and SaaS environments. Strong background in C#, ASP.NET MVC/Core, SQL Server, and front-end technologies, with a practical, delivery-focused approach to building, supporting, and improving production systems.

Core Skills Enterprise Tools and Skills

• DotNet: C#, VB.NET, ASP.NET MVC & ASP.NET Core
• ADO.NET, LINQ, Entity Framework Core
• AI Prompt Engineering, Agent Instruction and Rule Management, AI Tool and MCP Server implementation and strategic use.
• Model selection based on requirements, task, and context.
• RESTful Web APIs, SOAP services, background services
• Microsoft SQL Server, Azure SQL Database, stored procedures, indexing, query optimization
• PostgreSQL Database experience including PL/SQL (reporting, integrations, legacy systems)
• Visual Studio 2015–2022, Azure DevOps / TFS
• Windows Services, Windows Task Scheduler

UI & Front-End Development

• HTML5, CSS3, JavaScript (ES5/ES6)
• jQuery for DOM manipulation, AJAX workflows, and legacy UI support
• Bootstrap 3 & 5 and Tailwind CSS for responsive enterprise UI design
• Blazor or React for modern SPA development

Quality & Delivery

• Test-Driven Development (TDD) and unit testing practices (xUnit / MSTest) for maintainable codebases.
• Experienced with all versions of Microsf tVisual Studio, Visual Studio Code, Google Antigravity IDE, MS-SQL and PostrgeSQL cloud or om-premises administration and development.
• Experience writing and maintaining automated tests integrated into CI/CD pipelines.
• Strong focus on code maintainability, documentation, and long-term system support.

Other Technical Capabilities

• Full Stack Engineering: DotNet, C#, Razor/MVC, T-SQL/PLSQL, NoSQL, Python, Node.js, Docker, REST & GraphQL
• AI/ML & Data: LLM fine-tuning, RAG pipelines, multimodal agent use.
• ID and CLI AI Agent Workflow Development using Specification-Driven and Test-Audited iterative techniques.
• AI Agent Tool and MCP Server selection and implementation.
• Infrastructure & DevOps: Azure, Linux VMs, CI/CD, Terraform

Recent Projects

Founder & Architect - Lockb0x Protocol + Pakana | 2022-Present
(Revised bullets added to signal hands-on development and delivery)

• Designed and implemented ASP.NET Core and MVC applications supporting CRUD workflows, role-based access control, and high-volume transactional data.
• Built data access layers using Entity Framework Core and Dapper, optimizing queries and stored procedures in SQL Server.
• Developed and maintained RESTful Web APIs consumed by web and internal systems.
• Implemented background processing and scheduled jobs using Windows Services and Task Scheduler equivalents.
• Performed hands-on debugging, performance tuning, and production issue resolution.
• Architected and deployed Lockb0x Codex: a decentralized IPFS-based content registry linked to blockchain transaction anchors.
• Developed Stellar Razor & Blazor Components to integrate Web3 functionality into .NET web applications.
• Led design of agentic AI tools for compliance tracking, deliverable validation, and user-guided workflows.

**Technical Advisor / Consultant (Freelance)

2020-Present**

• Delivered technical solutions for small businesses, civic tech startups, and fintech orgs seeking custom backend and integration systems.

Experience

• 7/2022 – Present – Building Pakana.net, a Title and IP Asset Lien/Release/Title Management SaaS Application utilizing decentralized ledgers and storage. Designed SQL schema, Entity Framework ORM layer (Dapper), DotNet codebase, and Razor UI/UX. Assisted by CoPilot, ChatGPT Codex, and Gemini,
• 6/2023 - 11/2025 - Architected enterprise application strategy for family office’s holding company. Designed architecture and technology specification for M365, internal HR, Payroll, etc.
• 3/2023 - 9/2023 - Designed, proposed, and awarded a grant to build the Stellar Identity Framework, enabling blockchain identity, ledger operations, and federated identity resolution via Razor Pages. Designed SQL Server schemas, views, indexes, and stored procedures supporting enterprise reporting and high-volume transactional systems.
• 8/2022 - 2/2023 - Designed, proposed, and awarded a grant to develop the Stellar Razor Component Library, a set of UI/UX components to abstract blockchain operations.
• 9/2018 - 2/2022 - Developed Three Lock Box, a lien-release and disbursement application built with DotNet Razor, PostgreSQL, and deployed to Azure App Service via GitHub CI/CD. Performed query optimization and performance tuning for high-volume datasets to maintain system performance and stability.
• 10/2017 - 5/2018 - Optum (United Healthcare) Enterprise Business Intelligence Architect. Delivered several data-driven MSB and Excel-based SharePoint dashboard components. Maintained and enhanced existing MS SQL Server Stored Procedures, Views, and Report Queries. Configured enterprise data sources within enterprise policies and procedures.
• 6/2015 - 6/2016 Alogent - Core banking software GL and Accounts migration and ETL engineer. Developed specifications and built enterprise data migration environments for credit unions and banks to implement Alogent’s Azure DotNet Core Banking Software. Developed custom ETL applications using VB.NET for each client to implement data clean-up, normalization, and migrations and integrations across Microsoft SQL Server, PostgreSQL, Oracle systems, including PL/SQL or T-SQL as needed.
• 10/2010 - 6/2015 Various Consulting Projects:
  • Elevate Digital - opened a Las Vegas satellite office for Chicago-based digital media company. LEad project to implement smart-city technologies for Caesars properties. Built and deployed a network of free-standing interactive, touch-screen kiosks across The Linq, Paris, Flamingo, and Bally’s resorts on the Las Vegas Strip. Developed integrations with Facebook and twitter to allow people to take a selfie using the kiosk which would insert a custom background and post to social media. Developed a VB.NET and MS-SQL Server driven Hotel; Check-In Touch-Screen Kiosk for The Linq. It allowed arriving guests to scan their ID or passport, then it would look up their reservation in the hotel reservation system, offer to add upgrades and amenities, then encode a plastic room key-card and dispense it.
• 8/2009 - 9/2010 URS (E.G\&G.) – Enterprise Database Administrator. Migrated several disparate stand-alone legacy enterprise applications in a high-security sensitive national defense-sensitive environment (TS-SCI) into a new MS-SQL Server 2008 R2 Enterprise database cluster and schema for the enterprise CostPoint implementation. Included implementation of Cognos BI reporting features, and integration of enterprise report templates. Migration and development of site-specific Excel and other types of custom reports to Cognos BI Reports.
• 1/2009 - 8/2009 - Furniture Expressions - Developed master template website and backing data layer using C# and T-SQL to build a platform powering 9 online furniture e-commerce sites.
• 9/2007 - 12/2008 - Opened and operated a beachfront breakfast and barbecue café in Laie, Honolulu, Hawaii. Built a custom point-of-sale and inventory system using VB.NET and MS-Access.
• 1/2004 - 8/2007 - Worked with a team of retired engineers and the Department of Veteran Affairs in a federal technology transfer program. Highlights include porting the VA’s VistA/CPRS Electronic Healthcare Records from its proprietary MUMPS implementation to open-source GT.M and released OpenVista, a full-featured open-source Electronic Healthcare Record System. Developed several other applications using VB 6 for use by administrative and clinical staff. For example, an early foot-switch activated video otoscope image capture program.
• 1/2003 - 12/2003 - State of Hawaii Department of Commerce and Consumer Affairs - Forensic Investigator III. Worked with Department Leadership to define and develop a set of tools for analyzing business filings and flag specific anomalies, disallowed filers, etc. Developed document scanning operations to allow clerks to OCR filed documents then verify the data before committing the record to the database and saving the scanned image to a CD storage array (jukebox). Used MS-SQL Server and VB5/6.
• 6/1999 - 12/2002 - Designed, developed, and built a city-wide WiFi network in Honolulu using early (2MBps) WiFi technology. Developed a custom ASP.NET website with VB.NET and MS-SQL Server to accept payments using Authorize.net, then using Active Directory with DHCP allocate routable IP addresses to allow public Internet access via WiFi in downtown Honolulu and Wiaikiki. Sold to Oceanic Time-Warner.
• 1/1998 - 12/1998 - Designed and implemented a high-speed airline ticket scanning, OCR, and data validation system for Hawaiian Airlines.Built with VB5
• 1992 - Developed a Correspondence and Contact Management Application for The Governor’s Office of Hawaii using Visual Basic 3 and an MS-Access (MDB) database file.
• 1990-1995 - RadioShack Tandy Computer Center Assistant Manager, Honolulu, HI

Education & Credentials

• Microsoft Certified Professional (MCP)
• Azure AI Foundry Certification
• Google Al for Leaders Certification
• DeFi Specialization – Duke University (Coursera)
• Nevada Escrow Agent Pre-Licensing Education: Escrow Agent Essentials
• Ongoing continuous learning in generative AI, blockchain, data governance, and secure protocol development.