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Lucas Costa

Lucas Costa

AI Engineer · Full Stack Systems Architect & Software Developer

Five products I own and run.

OpenLimiter website

OpenLimiter

Visit

Local first quota meter for AI coding subscriptions.

Bashertz website

Bashertz

Visit

An AI Shadchan for marriage minded Jewish singles.

Perpeta website

Perpeta

Visit

Legal AI for Brazilian lawyers, citations checked against the source.

RagnarokBR website

RagnarokBR

Visit

A Brazilian Ragnarok Online server, back with the original crew.

BizAdemy website

BizAdemy

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Websites, ads, search and AI assistants run as one lead system.

AI systems that run in production.

OpenLimiter is open source if you want to read my code.

AI concierge voice agents

Real time voice agents answer customer service and reservation calls, with fallback and escalation built in. They handle real customers daily.

CallerAgentTools

Multi LLM routing architecture

Dynamic model selection weighs cost, latency and task complexity, with fallbacks across providers. Inference costs fell 40 percent or more with quality held.

RequestRouterProviders

RAG knowledge systems

Ingestion workflows turn unstructured documents into searchable stores for the agents. Answers became more accurate and reliable.

DocumentsIndexAnswer

Sites that run real businesses.

Healthcare staffing, jewellery, remediation, carpentry and septic treatments, across Canada.

Zadel Jewellery Studio website

Zadel Jewellery Studio

Custom engagement rings from a Granville Island studio.

Bespoke jewellery · via BizAdemy

Leader Construction website

Leader Construction

Decks, fences and kitchens by a Red Seal carpenter.

Custom carpentry · at Seasmoke

Septicsol website

Septicsol

Enzyme septic treatments sold at Canadian Tire.

Enzyme septic treatments · Direct

What I do, as a system.

Software, AI systems, automation and infrastructure, built to work as one.

SoftwareAI systemsAutomationInfrastructureClientTypeScriptReactBackendNode.jsPHPAgentsMCPTool useModel routerOpenRouterOpenAIKnowledgeVector searchIngestion pipelinesAutomationn8nVapiInfrastructureVercelCloudflareSoftwareAI systemsAutomationInfrastructureClientTypeScriptReactBackendNode.jsPHPAgentsMCPTool useModel routerOpenRouterOpenAIKnowledgeVector searchIngestion pipelinesAutomationn8nVapiInfrastructureVercelCloudflare

Twenty years, São Paulo to Vancouver.

From a school website in São Paulo to AI engineering in Vancouver, with nearly a decade at Seasmoke along the way.

  1. Seasmoke Hospitality

    Vancouver, BC, Canada2017 to Present9 years and counting

    1. 2025 to Present

      AI Engineer

      Leads all AI engineering across Seasmoke's products, workflows and client systems, and moved the company from traditional web development to AI driven systems, products and workflows.

      Architected and shipped five or more production systems as the sole architect, lead developer and deployment engineer: real time voice agents on Vapi, ElevenLabs and LiveKit that take customer service and reservation calls, chat agents, RAG pipelines over Markdown and vector retrieval, and n8n automation workflows wired into APIs, databases and CRMs.

      Designed the multi LLM routing on OpenRouter that weighs cost, latency and task complexity per request, cutting inference spend by 40 percent or more at the same quality, and brought MCP servers and agentic workflows to the team with hands on training for non technical staff.

    2. 2017 to 2025

      Senior Web Developer

      Built and maintained 35 plus WordPress websites for luxury resorts across Central America and the Caribbean, with booking engine integrations on WordPress, PHP, JavaScript, React and Next.js.

      Owned the platform around every site: hosting, DNS, SSL certificates, themes, plugins, SEO and performance, so each property stayed fast and online.

      Ran the Google Ads, Facebook Ads and LinkedIn campaigns and the promotional graphics behind them, driving direct bookings and revenue for the resorts.

  2. EnrollmentResources.com

    Victoria, BC, Canada2015 to 2016

    1. 2015 to 2016

      Web Designer and Developer

      Created and developed WordPress websites for universities across the USA and Canada, from fully responsive themes to the custom plugins their enrollment platforms needed.

      Managed each project end to end: analysis and review of the work, client communication and quality assurance before delivery.

  3. Officepools.com

    Victoria, BC, Canada2014 to 2015

    1. 2014 to 2015

      Front end UI and UX Developer

      Responsible for the whole front end of the Officepools product, the website and the system's interface alike.

      Designed and built the new UI and UX components and features the platform shipped, from layout to interaction.

  4. NeoAssist.com

    São Paulo, SP, Brazil2009 to 2014

    1. 2009 to 2014

      Web Designer and Developer

      Developer chief of the front end for NeoAssist's multi platform customer service tools, the multimedia servicing of enterprise customers.

      Analysed and reviewed projects for the company's clients, and created websites and platforms for international accounts including Walmart, Nike, Kraft Foods, Unilever and Sephora.

  5. Colégio Dimensão

    São Paulo, SP, Brazil2005 to 2006

    1. 2005 to 2006

      Technical support and web

      Supported students upgrading their skills in Photoshop, HTML and CSS.

      Designed, built and maintained the front end of the school's website, and created the graphic advertisements for its events and activities.

  6. Universidade Presbiteriana Mackenzie

    São Paulo, SP, Brazil2010 to 2014

    Four years of Computer Science coursework.

Lucas Costa

AI Engineer · Full Stack Systems Architect & Software Developer

Open to AI engineering and senior full stack roles, hybrid in Vancouver or remote.

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