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Raul PereiraRP
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Raul Pereira

@raulpe7eira

Software Engineer at Arionkoder, improving Amex hotel search with Elixir and end-to-end tracing.

Brazil
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At Arionkoder, I work on the team responsible for the hotel search service for Amex's travel platform. Using Elixir and Phoenix, I’ve improved search latency, observability, and end-to-end tracing.

At CloudWalk, I contributed to JIM, an AI agent for banking operations on InfinitePay, built with Elixir and the BEAM. I standardized observability, built an encrypted image-upload system, and contributed to Kafka integrations and MCP integration.

Through R3M Tech, my own company, I provide software development services as a contractor and take on freelance projects for research centers, mid-sized companies, and startups. My work includes creating, maintaining, and enhancing applications and services, as well as developing prototypes for research.

Earlier, I worked across backend, full-stack, and systems analysis roles, including leading a team delivering microservices for C6 Bank’s mobile apps and back-office systems. I enjoy solving real problems, shipping reliable systems, and working with teams that care about quality and continuous improvement.

Experience

Work history, roles, and key accomplishments

AR
Current

Software Engineer

Arionkoder

Oct 2025 - Present (1 year)

Worked on the hotel search service for Amex's travel platform, aggregating availability, rates, and promotions, ranking results, and personalizing offers. Improved observability, implemented OpenTelemetry context propagation, and built new features.

RT
Current

Founder

R3M Tech

Jun 2012 - Present (14 years 4 months)

Provided software development services as a contractor and took on freelance projects for research centers, mid-sized companies, and startups. Created, maintained, and enhanced applications and services, and developed prototype applications for research.

SM

Fullstack Developer

Supply Midia

Oct 2017 - Feb 2018 (4 months)

Developed and maintained new modules for an EDI system integrating companies with their banks, using Java, JSF/PrimeFaces, and PostgreSQL. Built the landing page for a new product using WordPress.

SO

Fullstack Developer

Sonda

Jun 2017 - Oct 2017 (4 months)

Provided development services to BR Distribuidora, using Java on the backend and AngularJS on the frontend. Responsible for the initial production release of a sales force portal.

AT

Senior System Analyst

Atos

Aug 2007 - Mar 2012 (4 years 7 months)

Worked as a senior system analyst at Atos.

BR

Requirements Analyst

BRQ

Sep 2006 - Jul 2007 (10 months)

Worked as a requirements analyst at BRQ.

TP

Mid-level System Analyst

Tecgraf / PUC-Rio

Apr 2005 - Aug 2006 (1 year 4 months)

Worked as a mid-level system analyst at Tecgraf / PUC-Rio.

DR

Junior System Analyst

Drive

Sep 2000 - Feb 2005 (4 years 5 months)

Worked as a junior system analyst at Drive.

CF

Internship

Caixa Econômica Federal

May 2000 - Aug 2000 (3 months)

Completed an internship at Caixa Econômica Federal.

Education

Degrees, certifications, and relevant coursework

PUC-Rio logoPU

PUC-Rio

Postgraduate, Ergonomics, Usability and Human-Computer Interaction

2006 - 2006

Postgraduate degree in Ergonomics, Usability and Human-Computer Interaction: Ergodesign and Interface Evaluation from PUC-Rio in 2006.

PUC-Rio logoPU

PUC-Rio

Postgraduate, Systems Analysis, Design and Management

2002 - 2004

Postgraduate degree in Systems Analysis, Design and Management from PUC-Rio from 2002 to 2004.

UN

UniverCidade

Undergraduate, Data Processing

1998 - 2001

Undergraduate degree in Technologist in Data Processing from UniverCidade from 1998 to 2001.

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