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Nicolas CostaNC
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Nicolas Costa

@nicolascosta2

Senior software engineer at Softo building LLM gateways, RAG audit pipelines, and fullstack products.

Brazil
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At Softo, I implemented a multi-tenant LLM gateway with per-customer API keys, usage governance, cost observability, and fallback. I also worked on Revla’s conversation-audit pipeline, integrating Zendesk tickets and migrating orchestration from AWS Glue to AWS Step Functions.

On Revla, I integrated RAG with PostgreSQL metadata and OpenSearch vector search. I led a fullstack platform restructure, moving the backend from Python serverless services to NestJS and the frontend from Vue.js to React.

At Idiomus, I led the technical development of Teacher Poli, a virtual language teacher whose content was entirely generated by OpenAI LLMs. I developed its Input module, including LLM-generated text, audio, and questions, and introduced automated frontend and backend tests.

At Fretebras (Deal Technologies), I redesigned the password-recovery flow to eliminate account-takeover vulnerabilities and developed Go services connecting a WhatsApp chatbot to internal systems. Across my work, I’ve built APIs and data pipelines with PHP, TypeScript, Python, and Go, and completed postgraduate study in Information Security.

Experience

Work history, roles, and key accomplishments

ID

Engenheiro Fullstack

Idiomus

May 2024 - Jun 2025 (1 year 1 month)

Led technical development of Teacher Poli, a virtual language teacher with content fully generated by OpenAI LLMs. Designed and developed the Input module end-to-end, fixed bugs reducing refund requests by 25%, and created CI pipeline with automated tests.

CA

Engenheiro Backend

Canalfy

May 2021 - Mar 2022 (10 months)

Led modernization of an affiliate marketing platform MVP, developing backend in Laravel and frontend in Next.js with automated tests, CI/CD, and AWS. Conducted technical interviews for candidates.

WI

Engenheiro Fullstack

Weef Interativa

Jul 2020 - May 2021 (10 months)

Worked on Infection Surveillance Service (Qualis) for hospital infection prediction, and on Zukese apps (Ionic) integrated with Django and GraphQL. Maintained and evolved web and mobile applications for clients like Santander, Experience Club, and RH Health.

CS

Engenheiro Fullstack

Codificar Sistemas

Jul 2019 - Jan 2020 (6 months)

Developed fullstack applications using Laravel, Vue.js, and Ionic, including KomatsuApp for heavy machinery inspection and Darkflix for streaming.

LD

Engenheiro Mobile

Lab3 DVLP

Feb 2019 - Apr 2019 (2 months)

Developed mobile applications using React Native and Adonis.js.

CT

Engenheiro Fullstack

Coding_ Tecnologia

Dec 2017 - Dec 2018 (1 year)

Developed fullstack applications using Laravel, Ionic, and Python/PySide, leading projects like Bera+ (audiological exam) and EvenTUDO QReader.

Education

Degrees, certifications, and relevant coursework

IP

IPOG

Pós-graduação, Computação Forense e Segurança da Informação

2021 - 2022

Pós-graduação em Computação Forense e Segurança da Informação.

UN

UNCISAL

Tecnólogo, Sistemas para Internet

2017 - 2019

Tecnólogo em Sistemas para Internet.

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