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JasonTeixeira/README.md

Jason (Sage) Teixeira

AI Automation & AI Software Developer | Python, TypeScript, SQL & API Integrations | Fintech

I build software that connects applications, data, and everyday business processes. My work includes fintech dashboards, trading tools, AI workflows, and voice-enabled learning applications. I like figuring out where a process breaks, building a useful feature, and checking what happens when the inputs are messy.

At Nexural, I build trading applications and work on the APIs and data services behind them. Previously, I developed fintech dashboards and market-data workflows at HighStrike in a 14-person remote team. My Computer Science and Finance education helps me work through both the code and the business questions.

Engineering portfolio · LinkedIn · Email

Start with these projects

Watch the 77-second Supplier Update Triage walkthrough. It shows actual captured n8n configuration, AI output, validation rules, SQLite records, and the outage path. It is an edited walkthrough of a local capstone with fictional emails, not a new live run.

Project What to inspect Scope
Supplier Update Triage Actual n8n workflow, custom Ollama prompt, Python validation, SQLite output, manual review, and duplicate handling Local capstone using fictional supplier emails. The current checkout passed 42 automated tests on November 2, 2026.
LLM Evaluation Gate Golden cases, Promptfoo assertions, a pass-rate floor, and GitHub Actions Seven baseline mock cases passed; deliberately broken mock responses failed all seven. These runs check the evaluation setup, not live-model accuracy.
Nexural Automation Trading research tools, example data, integration components, and testing workflows An engineering and research lab. Simulation results are separate from live trading performance.
Engineering Portfolio Interactive examples, project notes, source links, and captured quality checks A starting point for discussing implementation choices and limitations.

My cloud work also includes Terraform/AWS modules. I am reviewing their validation, security checks, and deployment assumptions before presenting them as deployment-ready examples.

How I work

I keep AI extraction separate from business-rule validation, make uncertain cases visible, and test failure paths alongside successful ones. I document decisions so another person can understand the implementation and reproduce the result.

Before focusing on software, I managed client projects at Sage Ideas. Coordinating budgets, schedules, subcontractors, and issue resolution taught me to ask clear questions, communicate changes, and follow through. I bring that approach to development.

Tools I use

  • Software: Python, JavaScript, TypeScript, React, Next.js, SQL, REST APIs, Git, Docker.
  • Automation and evaluation: n8n, Make, Zapier, Ollama, Promptfoo, GitHub Actions.
  • Current development: cloud applications, deployment practices, and Terraform/AWS examples.

Background

  • Founder & Lead Developer, Nexural: January 2024-present.
  • Senior Analyst & Full-Stack Developer, HighStrike: January 2021-January 2026.
  • Project Manager & General Contractor, Sage Ideas: January 2016-January 2021.
  • B.S. Computer Science, Full Sail University (2012); B.S. Finance, Kean University (2010).
  • TripleTen AI Automation program: in progress.

Work with me

I am based in Orlando, Florida and seeking remote, hands-on software development, AI automation, or API integration work. I am also open to technical implementation and application support roles that use these skills. I am a US citizen and do not require US work sponsorship.

I speak fluent English and Portuguese, with conversational Spanish. For international remote opportunities, I work from the United States.

I am happy to walk through the code and decisions behind my projects. Contact sage@sageideas.org or connect on LinkedIn.

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  1. Nexural_Automation Nexural_Automation Public

    Safety-first NinjaTrader 8 automation engineering lab: executable Academy, NinjaScript bridge, risk kernel, fault recovery, research, and evidence gates.

    TypeScript 9 1

  2. jt-portfolio jt-portfolio Public

    Jason Teixeira — AI Automation × QA/LLM-Eval engineer portfolio. The site runs its own QA: the proof strip on the page is generated by this repo's test suite.

    HTML

  3. llm-eval-gate llm-eval-gate Public

    Your first green LLM eval gate in 10 minutes — zero API keys to start. Golden sets + Promptfoo + a CI gate that can say no. From the engineer behind an 85-runner QA platform.

    JavaScript

  4. tripleten-ai-automation-portfolio tripleten-ai-automation-portfolio Public

    AI automation projects, workflow designs, analyses, and presentations completed during the TripleTen AI Automation program.

    HTML