Portfolio

Lautaro Walther

Software Engineer

I'm a Software Engineer with more than 5 years of experience. Building reliable systems with Node.js and TypeScript, with a focus on production architecture, integrations, and operational clarity.

Node.jsTypeScriptBackend ArchitectureIntegrations
Avatar illustration of Lautaro Walther

Connect

I build backend-heavy products, integrations, and internal systems with a practical fullstack mindset. If you want to see how I work or continue the conversation, these are the best places to reach me.

About me

I started programming at 15 and turned curiosity into product work

My path into software began early. At 15, I was already spending time exploring technology, security, and how systems worked behind the screen. That curiosity quickly shifted into programming, where I found the part of tech I wanted to build my future around.

One of the strongest turning points came when I joined Discord and decided to build a bot for the platform. That project became LovelyBot, and it eventually reached more than 4,000 servers. It taught me how real users, product decisions, maintenance, and scale can change the way you think about software.

Since then, I have kept moving toward backend-focused engineering with fullstack range. What started as self-driven learning became freelance work, professional product delivery, and a long-term interest in building reliable systems that actually help people.

Experience

Open to work
CodigoDelSur logo

CodigoDelSur

Fullstack Developer

Nov 2024 - Present

Working full-time on remote product delivery across backend and frontend surfaces with a backend-first execution style.

  • Develop and maintain scalable APIs using Node.js and TypeScript.
  • Migrate and improve a legacy Java system to Node.js with TypeScript.
  • Use OpenSearch for event logging and monitoring.
  • Implement asynchronous jobs with BullJS and Redis.
  • Optimize performance and debug issues in production environments.
  • Work within a microservices-based architecture.
Node.jsNestJSExpressTypeScriptPostgreSQLRedisAmazon LambdaAmazon S3Amazon EC2Amazon SQSAmazon SNSOpenSearchCloudWatchBullJSDocument AIReact.jsReact Native
SaiLO (Alternativas Inteligentes S.A.) logo

SaiLO (Alternativas Inteligentes S.A.)

Backend Developer

Oct 2022 - Nov 2024

Worked full-time on backend systems and business logic for production applications, with strong focus on API behavior and operational stability.

  • Developed and maintained a SaaS platform.
  • Migrated and improved a legacy PHP/Yii2 system to Node.js/NestJS.
  • Implemented new backend features and maintained APIs.
  • Resolved complex bugs and provided production support.
  • Worked with relational databases and optimized queries.
Node.jsNestJSTypeScriptMySQLPHPYii2
Riveras del Suquia logo

Riveras del Suquia

Software Developer

Sep 2021 - Oct 2022

Worked on development and maintenance of projects for different cooperatives.

  • Built WordPress websites for cooperatives.
  • Developed web and mobile applications using React and React Native.
  • Implemented backend services with Node.js and Express.
  • Managed server infrastructure and deployments for production applications.
Node.jsTypeScriptExpressPHPWordPressReact.jsReact NativeNginxApacheLinuxMySQL

Stack

Backend, frontend, mobile, cloud, and supporting tools

I work backend-first, but the stack around that work matters. These are the technologies I use most often when shipping products end to end.

Backend

Core languages, frameworks, APIs, persistence, and server-side workflows.

Node.jsSocket.IOExpress.jsNestJSPHPPythonAxiosMySQLMongoDBPostgreSQLRedis

Frontend + Mobile

Interfaces, component systems, product-facing web implementation, state management, and cross-platform delivery.

HTMLCSSTailwind CSSJavaScriptTypeScriptReact.jsReact QueryNext.jsBootstrapjQueryReact Native

Cloud

Infrastructure and managed services used to run, store, and process production workloads.

AWSDockerKubernetesFirebaseNginxApacheLinuxDocument AI

Other

Tooling, delivery support, automation, and operational utilities used across projects.

GitGitHubNPMYarnJestMochaPostmanSentryWordPressYii2BullJSOpenSearch