Open to opportunities

Guilherme Delfino Narciso

@guilhermenarciso

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Mid-level backend software engineer with 3+ years building Java/Spring Boot and Go microservices across AWS and Azure.

Brazil

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What I'm looking for

I’m looking for a backend-focused role where I can build Java/Go microservices and distributed systems, working with cloud platforms (AWS/Azure), strong observability, and an Agile Scrum team that values reliable delivery.

I’m a mid-level Software Engineer with 3+ years of backend experience, specialized in Java (Spring Boot) and Go. I focus on microservices architecture, distributed systems, and cloud environments—built through delivery work at Accenture and Netcracker.

At Netcracker, I’m part of the first Brazilian team for Netcracker’s NDO OSS product, supporting global Tier 1 operators. I’ve worked on backend features and production fixes, including tracing a critical Google Fiber timeout via Graylog and re-indexing an ArangoDB query to cut execution time from 40s+ to 6s.

Earlier at Accenture, I delivered platform features for RaiaDrogasil using Spring Boot microservices and React/Next.js, along with RabbitMQ and OracleDB. I also built the Click & Collect experience and integrated inventory systems through microservices, adding testing and observability (Datadog) to keep delivery reliable.

Before that, as a Systems Analyst Intern, I built a BFF with Node.js/NestJS and GraphQL, using MongoDB caching to reduce latency. I enjoy engineering that balances performance, correctness, and operational visibility in Agile Scrum teams.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Netcracker

Jan 2025 - Present (1 year 3 months)

Developed and maintained Netcracker NDO OSS features for global Tier 1 operators, fixing production issues and implementing backend changes. Resolved a critical Google Fiber go-live timeout by tracing bottlenecks with Graylog and re-indexing an ArangoDB query, reducing execution time from 40s+ to 6s across 2M+ active records.

Java Go Spring Boot Microservices Kubernetes Kafka Docker ArangoDB Graylog Distributed Systems

Systems Analyst

Accenture

Aug 2023 - Jan 2025 (1 year 5 months)

Delivered backend and feature development for RaiaDrogasil, supporting a platform with 47.6M active customers using Spring Boot microservices and Next.js. Built Click & Collect integrations with inventory microservices and implemented Circle K real-time communication via a Java socket server and cloud-native Azure services.

Java Spring Boot Microservices Next.js RabbitMQ azure monitor Socket Programming Observability

Systems Analyst Intern

Accenture

Aug 2022 - Aug 2023 (1 year)

Built a Node.js/NestJS BFF using GraphQL and MongoDB caching to reduce latency by avoiding direct calls to third-party providers. Implemented RabbitMQ-based microservices with Redis caching and async workflows, covering hundreds of queues with unit testing via JUnit and Mockito.