ALAN JAHNEL / Software engineering
~/profile01 / INTRO

Senior Software Engineer

Alan Henrique
Jahnel

I build backend services and full-stack products with Node.js, TypeScript, NestJS, and React.

My work spans APIs, integrations, and legacy modernization. I enjoy simplifying complex systems and taking work from technical design through delivery and production support. Based in Brazil, I’ve collaborated remotely with teams in Brazil and the US, in Portuguese and English.

portraitALAN / JAHNEL
Cyberpunk portrait of Alan Jahnel with cyan and magenta lighting.
Backend & full-stack engineering
Based in
Brazil
Languages
Portuguese / English

[02] Work

Professional experience

My roles across backend, full-stack products, cloud infrastructure, and software modernization.

View my experience on LinkedIn

ROLE / 01National Carwash Solutions

Senior Software Engineer

Jun 2025 – Aug 2026Remote · United States

I built Node.js and NestJS backends for an operational insights product and contributed APIs, integrations, and reporting to a Java/Spring ERP. Working daily with US-based teams, I also delivered production BI reports with Sigma and Snowflake and prototyped incremental modernization paths.

  • Node.js
  • TypeScript
  • NestJS
  • Java / Spring
  • PostgreSQL
  • Sigma / Snowflake
ROLE / 02NextIp

Senior Software Engineer

Jun 2023 – Jun 2025Remote

I migrated Express services to NestJS, simplified a multi-service application into a modular monolith, and built customer integrations for a multichannel support platform. I also moved the frontend to React/Vite, worked on real-time messaging, and took on Tech Lead responsibilities for approximately four months.

  • Node.js
  • NestJS
  • TypeScript
  • React / Vite
  • Redis
  • WebSocket
  • AWS SQS / SNS
ROLE / 03OnlineBR.net

Technical Consultant

Apr 2023 – Sep 2023Part-time · Remote

I provided part-time technical consulting on Azure infrastructure, troubleshooting, observability, and operational reliability. I helped the team resolve more complex technical issues and supported infrastructure improvements during periods of higher demand.

  • Azure
  • Datadog
  • Observability
  • Infrastructure
ROLE / 04Amplimed

Tech Lead

Dec 2022 – Jun 2023On-site · Chapecó, Brazil

I led frontend modernization from jQuery to React, creating the foundation for a production micro-frontend architecture. I supported a team of up to five developers with planning, code review, architecture decisions, and incident response while staying involved in implementation.

  • React
  • TypeScript
  • Micro-frontends
  • Code review
  • Healthcare SaaS
ROLE / 05Amplimed

Software Engineer

Feb 2022 – Dec 2022Chapecó, Brazil

I developed and maintained healthcare SaaS features across medical records, prescriptions, scheduling, financial workflows, and mobile. I contributed to new React interfaces, maintained legacy workflows, and supported incident response and day-to-day product stability.

  • PHP
  • MySQL
  • JavaScript
  • TypeScript
  • React
  • React Native
ROLE / 06Self-employed

Freelance Developer

Nov 2018 – Dec 2022Freelance · Alongside employed roles

I delivered small web, backend, and mobile projects before and during the beginning of my formal engineering career. I built APIs and interfaces, maintained and troubleshot existing applications, and managed client communication and project delivery independently.

  • Node.js
  • React
  • React Native
  • REST APIs
  • Mobile development
ROLE / 07G3 Sistemas de Informática

Software Engineer

Nov 2019 – Feb 2022On-site · Palmitos, Brazil

I helped modernize an agricultural cooperative ERP from COBOL toward Java/WildFly and EXT.js, and contributed production microservices with Quarkus and PostgreSQL. I also built web and mobile features, stabilized a field-service app with reliable ERP synchronization, improved GitLab CI/CD pipelines, and mentored junior developers.

  • Java
  • Quarkus
  • PostgreSQL
  • COBOL
  • React
  • Flutter
  • GitLab CI/CD

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