Reinaldo Araque

Senior Full Stack Engineer

8+ years building customer-facing web applications in B2B/B2C SaaS, FinTech, and EdTech

Stockholm, Sweden

About Me

I'm a versatile Full-Stack Engineer with 8+ years of experience building customer-facing web applications in B2B/B2C SaaS, FinTech, and EdTech. Currently at Mentimeter AB in Stockholm, where I've revamped onboarding experiences for 400K+ monthly sign-ups and led AI feature development.

I have a passion for crafting intuitive user experiences and scalable backend services, with expertise in JavaScript/TypeScript, React, Node.js, and cloud platforms. I thrive in fast-paced, cross-cultural environments and startup-style teams, contributing to interesting product experiences at companies that value craft and product thinking.

Experience

Senior Full-Stack Engineer

Mentimeter AB

Feb 2024 - Present

Planned and revamped the initial onboarding experience for 400K+ monthly sign-ups. Led frontend efforts for AI Builder feature with real-time UX patterns. Improved A-B-C testing strategies with ~2 experiments per month using Split.IO and MixPanel.

ReactTypeScriptSplit.ioMixPanelSnowflakeA/B Testing

Senior Software Engineer

Billhop AB

Sep 2023 - Dec 2023

Developed features for banking partners enabling payment categorization and processing. Focused on product-tech discussions, code reviews, and peer programming with fresh engineering practices.

Node.jsMongoDBReactGCPTerraform

Senior Software Engineer

Klarna Bank AB

Apr 2021 - Aug 2023

Led Partner Onboarding Experience and Transaction Banking initiatives. Built back-office tools for operator processes and money-flow reconciliation. Developed distributed backend services and enhanced component library for financial dashboards.

TypeScriptAWS LambdasDynamoDBSQSSNSMulti-regional deployments

Senior Software Engineer

Apptegy

Mar 2020 - Mar 2021

Developed core business features for CMS solution. Implemented development quality-of-life tools and best practices. Ongoing Ruby on Rails training for API updates including translations service caching for Google Translate API.

Vue.jsNuxt.jsVuexRuby on RailsJestESLintPrettier

Application Developer Sr Analyst

Accenture

Sep 2017 - Mar 2020

Led teams of 5+ developers across insurance and logistics projects. Developed 10+ Node.js services using HapiJS and re-implemented web applications with Angular 4+. Created POC systems with GraphQL and Spring Boot.

Node.jsHapiJSAngular 4+GraphQLSpring BootReactReduxTypeScript

Developer Profile

Inspired by Stack Overflow Developer Survey • Honest preferences and experience

🚀 Most Admired Technologies

TypeScriptReactNext.jsNode.jsPostgreSQLTerraformJest

🎯 Want to Work With

RustGoSvelteDenoEdge ComputingKubernetesWebAssembly

⚡ Most Popular in My Stack

JavaScriptTypeScriptReactNode.jsPostgreSQLGitVS Code

☁️ Cloud & Infrastructure

AWSGCPDockerGitHub ActionsTerraformVercelNetlify

💼 Previous Roles

Senior Full-Stack EngineerSenior Software EngineerApplication Developer Sr AnalystFull-Stack Developer

🏢 Industries Worked In

SaaS/Interactive PresentationsFinTech/BankingEdTech/EducationInsuranceLogistics

Projects

E-Commerce Platform

Full-stack e-commerce solution with React, Node.js, PostgreSQL, and Stripe integration. Features include user authentication, product catalog, shopping cart, and order management.

ReactNode.jsPostgreSQLStripeJWTRedux

Cloud Infrastructure Automation

Infrastructure as Code using Terraform and AWS. Automated CI/CD pipelines with GitHub Actions, Docker containerization, and Kubernetes orchestration.

TerraformAWSDockerKubernetesGitHub ActionsHelm

Real-time Analytics Dashboard

React-based dashboard with real-time data visualization using D3.js, WebSockets, and Redis for caching. Displays KPIs and metrics from multiple data sources.

ReactD3.jsWebSocketsRedisNode.jsChart.js

Contact

Let's connect! I'm always interested in new opportunities and collaborations.