I'm Hagar Viana Telles, a software engineer and full stack developer based in São Gonçalo, Brazil. I specialize in building scalable systems, modernizing architectures, and automating complex processes to deliver business impact. I enjoy collaborating with cross-functional teams to ship reliable software and continuously improve performance and developer experience. Over the years I’ve led architecture definitions, implemented automation workflows, and driven cloud-native solutions across AWS and Azure. I’m passionate about clean code, robust testing, and crafting delightful user experiences while keeping security and scalability at the forefront.

Hagar Viana Telles

I'm Hagar Viana Telles, a software engineer and full stack developer based in São Gonçalo, Brazil. I specialize in building scalable systems, modernizing architectures, and automating complex processes to deliver business impact. I enjoy collaborating with cross-functional teams to ship reliable software and continuously improve performance and developer experience. Over the years I’ve led architecture definitions, implemented automation workflows, and driven cloud-native solutions across AWS and Azure. I’m passionate about clean code, robust testing, and crafting delightful user experiences while keeping security and scalability at the forefront.

Available to hire

I’m Hagar Viana Telles, a software engineer and full stack developer based in São Gonçalo, Brazil. I specialize in building scalable systems, modernizing architectures, and automating complex processes to deliver business impact. I enjoy collaborating with cross-functional teams to ship reliable software and continuously improve performance and developer experience.

Over the years I’ve led architecture definitions, implemented automation workflows, and driven cloud-native solutions across AWS and Azure. I’m passionate about clean code, robust testing, and crafting delightful user experiences while keeping security and scalability at the forefront.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Advanced
Portuguese
Fluent

Work Experience

Software Engineer at Sirius Support (UK)
July 1, 2025 - December 1, 2025
Technical Lead for a Chrome extension architecture: defined and implemented a corporate extension using HTML5, Tailwind, and JavaScript with a focus on responsive UX and performance. Built orchestration flows via N8N connecting Zendesk, FreeScout, and internal APIs. Implemented data persistence with MongoDB and Redis on AWS, eliminating repetitive manual support work. Refactored a critical Node.js ingestion microservice with clearer architecture, robust validations, and observability. Resolved architectural flaws causing internal DDoS and rate-limit blocks.
Consultant - Full Stack Developer & AI at Arte Ninja
March 1, 2025 - Present
AI-based SDR agent: developed a WhatsApp/Instagram lead qualification and outreach flow that qualified leads and completed a year’s worth of work in 2 months. Orchestrated integrations and applied Prompt Engineering for personalized service. Created high-performance web interfaces using React and Next.js to support sales funnel activities.
Full Stack Developer at DevL an d (Project ESX)
July 1, 2024 - May 1, 2025
Screening Automation: built a profile import system (LinkedIn/PDF) using Azure Functions and Azure OpenAI, reducing candidate registration time by ~90%. Product Engineering & DevOps: refactored PDF generators, implemented caching strategies, and set up CI/CD pipelines in Azure DevOps. Full Stack Development: built a voucher management system and collaborated on a CRM platform using Next.js, TypeScript, and AWS Cognito.
Interaction Expert at Teleperformance - Shopee
June 1, 2023 - January 1, 2025
Provided analytical support to logistics partners and drivers, resolving critical problems with assertive communication in a high-demand environment.

Education

Analysis and Systems Development at University Center IBM R
February 1, 2023 - August 1, 2026
Full Stack Developer Bootcamp at Reco de
June 1, 2023 - March 1, 2025

Qualifications

Libras Academy: Development of a Libras teaching portal for professional inclusion
January 11, 2030 - February 1, 2026
Responsive Web Design
January 11, 2030 - February 1, 2026
Introduction to HTML5/CSS3
January 11, 2030 - February 1, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment