Victor is available for hire
Hire VictorVictor Bueno
Verified Expert in Engineering
Solution Architecture Developer
Dubai, United Arab Emirates
Toptal member since July 17, 2014
Bio
Victor is a hands-on architect and tech lead with 30+ years of experience building software, much of it for mortgage lenders and fintech companies. He founded Nexel and built Nora, an AI agent that chases loan conditions, validates documents, and files them in the LOS. He builds LLM apps with OpenAI, Gemini, and LangChain on .NET, Go, TypeScript, and Python across AWS and Azure, has led teams of up to 20, and is comfortable in client-facing roles.
Portfolio
Nexel
OpenAI, LangChain, TypeScript, Node.js, PostgreSQL, Blockchain...
Cardone Ventures
Stripe API, Azure, LangChain, OpenAI, Gemini, TypeScript, Supabase...
10X Health System
Azure, Salesforce, HL7, .NET
Experience
- Solution Architecture - 15 years
- Technical Leadership - 14 years
- Cursor AI - 2 years
- Blockchain - 1 year
- Agentic Coding - 1 year
Work Experience
Founder & Lead Engineer
2025 - PRESENT
Nexel
- Founded Nexel and built Nora, an AI agent that chases open mortgage loan conditions with borrowers and third parties.
- Built Nora to validate returned documents with LLMs and file them directly into loan origination systems (MeridianLink, Arive), with Slack and DocuSign integrations.
- Designed a blockchain audit trail that anchors salted SHA-256 document fingerprints on Base for verifiable loan records.
Technologies: OpenAI, LangChain, TypeScript, Node.js, PostgreSQL, Blockchain, Large Language Models (LLMs), Agentic Coding
Technical Lead
2024 - PRESENT
Cardone Ventures
- Developed a platform to integrate orders from different sources like the iOS app and ClickFunnels into Netsuite and Hubspot. Created payment plans/subscriptions in Stripe where necessary. It was built using TypeScript, Deno, Supabase, and Swift.
- Created an AI app that manages close to 400 prompts to generate a Google Slide presentation. Built using Azure Search AI for document processing, OpenAI, and Gemini as the LLMs and LangChain to orchestrate.
- Helped the company adopt best practices in development, GitHub, CI/CD, and a few other standards and procedures.
Technologies: Stripe API, Azure, LangChain, OpenAI, Gemini, TypeScript, Supabase, GitHub Actions, Agentic Coding, WebSockets
Back-end Team Lead
2022 - 2024
10X Health System
- Contributed significantly to the company’s growth, helping it expand from a modest team of 10 to over 150 employees. My primary focus was on managing and scaling the eCommerce platform.
- Led the integration efforts with various labs and service providers. This involved establishing seamless connections between our systems and external partners, which was crucial for streamlining operations and improving service delivery.
- Oversaw the entire order processing and patient result management systems. Ensured that these processes were efficient, reliable, and scalable, which was essential as the company grew.
Technologies: Azure, Salesforce, HL7, .NET
Senior Back-end Developer
2022 - 2022
Rain
- Managed to shift from Windows and .NET to Linux and Go in a few weeks.
- Worked on the data ingestion group implementing several custom integrations to ingest customers' data.
- Provided new ideas and ways to manage ingested data to ensure better usage and availability of that data required to conduct the primary business use case.
Technologies: Go
Technical Lead
2018 - 2020
Pasbridge Ltd.
- Worked on several projects with a team of developers for different international customers creating web apps, mobile apps, back-end architectures, microservices, and more.
- Defined standards and tools to use in projects, led and mentored developers into using those tools, and monitor proper usage.
- Focused on security and performance on the back end using OAuth and Identity Server in several of those projects.
Technologies: Amazon Web Services (AWS), Azure, Artificial Intelligence (AI), .NET
Software Architect
2016 - 2018
The Money Source
- Designed and developed many apps for the company.
- Interviewed and hired developers for the team.
- Managed the team.
- Interfaced with the business to gather requirements, and suggested implementations and kick-off projects.
Technologies: Amazon Web Services (AWS), Azure, .NET
Lead Developer
2015 - 2016
Yeezers Interactive
- Managed several projects in the loan and credit management industry for several clients of Yeezers in the US.
- Led a small group of developers.
- Created both back-end applications, doing ETL, reporting, and data movement to and from different third party systems as well as front-end apps.
Technologies: .NET
.NET Web Developer
2014 - 2015
EasyJet
- Implemented page enhancements on the company's main website, regarded as one of busiest in Europe.
- Worked on the redirection mechanism used internally to avoid certain issues when mixing HTTP and HTTPS.
- Helped the porting of the site to be purely 64 bits to allow the platform to use more memory.
- Worked on several enhancements to the payments module.
- Supported the TeamCity build system to ensure proper deployment of NuGet packages to the correct location.
Technologies: Microsoft SQL Server, ASP.NET
Lead Developer
2013 - 2014
Mintec
- Contributed to the development of the first version of a new costing tool. Handled everything from requirements gathering to final development and testing.
- Implemented usage of a new set of methodologies and tools in the development department.
- Developed a complex multitask calculations engine in charge of calculating the risks and opportunities for retailers based on the their procurement data and Mintec's commodity data.
- Mentored team members in the new technologies and methodologies.
- Helped conduct second round interviews for new senior developers.
Technologies: ASP.NET
Senior .NET Developer, Team Lead
2013 - 2013
Sony
- Helped finalize development of the Windows 8 version of Sony’s online music system.
- Worked with a complex in-house JavaScript architecture requiring extensive JavaScript expertise.
- Dealt with issues in the JavaScript unit testing step arising from Sony's use of Jenkins for continuous integration.
- Learned advanced JavaScript techniques.
- Established close relationships with my coworkers.
Technologies: JavaScript
.NET Architect, Senior Developer, Team Leader
2011 - 2013
Wolters Kluwer
- Supported 15+ applications over a wide range of technologies.
- Introduced best practices to the development team.
- Managed a team with both onsite and offshore (India) members.
- Ensured SLAs regarding support tickets.
- Automated the whole environment with continuous integration and deployment scripts.
Technologies: .NET, C#, Microsoft SQL Server
.NET Architect, Senior Developer, Team Leader
2005 - 2013
Cambridge Assessment
- Involved in the development of many key web and back-end systems for the company.
- Mentored, interviewed, and coached other colleagues.
- Took part in all phases of many projects including estimating, designing, developing, and testing as well as generating automated deployment scripts.
- Introduced the Agile methodology.
- Acquired extensive exposure to the business, developing strong relationships based on trust and confidence in my work.
Technologies: Microsoft SQL Server, JavaScript, ASP.NET
Project History
Candidate Sampling Algorithm
Following a strict set of mathematical functions, we developed the system to "sample" specific candidates from a large list to perform QA on the marking exercise conducted by exam markers. Built in C# and SQL Server at Cambridge Assessment.
Nora - AI Mortgage Document Intake Agent
https://nora.nexel.meBuilt Nora, an AI agent for mortgage lenders that takes open loan conditions, follows up with borrowers and third parties by email, validates returned documents with LLMs, and files them into loan origination systems such as MeridianLink and Arive. Includes Slack and DocuSign integrations and a blockchain audit trail that anchors document fingerprints on Base.
AI Presentation Generator
Built an AI app that orchestrates close to 400 prompts to generate complete Google Slides presentations from company documents, using Azure AI Search for document processing, OpenAI and Gemini as LLMs, and LangChain for orchestration.
Certifications
MARCH 2006 - PRESENT
Microsoft Certified Database Administrator
Microsoft
FEBRUARY 2006 - PRESENT
Microsoft Certified Solution Developer
Microsoft
FEBRUARY 2006 - PRESENT
Microsoft Certified Application Developer
Microsoft
JANUARY 2005 - PRESENT
Microsoft Certified Professional
Microsoft
Skills
Libraries/APIs
REST APIs, Stripe API, Node.js
Languages
C#, JavaScript, SQL, TypeScript, Go, Python
Frameworks
.NET Core, .NET, ASP.NET
Paradigms
Microservices Architecture
Platforms
Azure, Amazon Web Services (AWS), Kubernetes, AWS Lambda, Salesforce, Docker, Blockchain
Storage
Microsoft SQL Server, PostgreSQL
Other
Solution Architecture, API Integration, CI/CD Pipelines, Technical Leadership, Cursor AI, Agentic Coding, Supabase, LangChain, OpenAI, GitHub Actions, WebSockets, Artificial Intelligence (AI), HL7, Gemini, Large Language Models (LLMs)
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