Hi, I'm

Jakob Neild.

Full stack developer & software engineer. 12 years shipping web apps, real-time multiplayer systems, data pipelines, and automation tools. I architect, build, test, deploy, and own the outcome.

TypeScript React NestJS Node.js PostgreSQL Docker AWS
See My Work Get In Touch

// about

Full Stack, Full Ownership

I've been building for the web since 2014 — from freelance client work in Nashville to solo-shipping a multiplayer MMO with 600+ automated tests and real-time game state synchronization. I don't just write code. I architect systems, write comprehensive tests, containerize with Docker, deploy to AWS, and monitor production.

Currently a QA Engineer at Serasa Experian, building automated test suites with Cypress and Cucumber for financial applications handling sensitive data. On my own time, I ship games, build data pipelines processing 120K+ records, and create automation frameworks.

I use AI tools daily to accelerate development — from code generation and review to architecture planning and test coverage analysis. I speak English natively, Portuguese professionally, and Spanish conversationally. Based in Brazil, available for remote work.

Languages
TypeScript JavaScript Python Java HTML/CSS
Frontend
React Next.js Astro Tailwind CSS
Backend
NestJS Node.js Express.js REST APIs
Data
PostgreSQL Redis Prisma PostGIS
Testing & QA
Cypress Jest Playwright Cucumber
DevOps & Cloud
Docker AWS EC2 Nginx CI/CD Linux

// projects

What I've Built

Stamp Collector Simulator

Live
stampcollectorsimulator.com →

Designed, built, and deployed a browser-based multiplayer MMO from scratch as a solo developer. Real-time game state synchronization via SSE, distributed background job processing, and a 180+ card game engine with PvP, adversary AI, and prestige systems.

NestJS Next.js TypeScript PostgreSQL Redis Docker AWS
  • Solo-architected full-stack MMO from zero to production
  • 600+ automated tests (420 backend, 189 frontend)
  • Real-time SSE with distributed resolver engine
  • JWT + OAuth, rate limiting, Helmet.js security hardening

Elder Care Facility Database

In Development

Built an ETL pipeline that aggregates ~120K elder care facilities from 5 federal data sources (CMS, NPPES, state registries) into a single deduplicated, geocoded dataset with spatial query support.

Python PostgreSQL PostGIS Docker
  • Processes ~120K records from 5 data sources
  • 5-tier deduplication (exact, fuzzy, Jaro-Winkler)
  • Census Bureau + Nominatim geocoding pipeline
  • 12-point data quality validation framework

Elder Care Lead Intelligence

In Development

B2B sales intelligence platform that identifies and scores hot leads by cross-referencing CMS staffing data, state filings, and industry news to surface operators most likely to buy a data analytics platform.

Python PostgreSQL Docker
  • Weighted lead scoring engine across multiple signals
  • Portfolio analysis: operator sizing & growth detection
  • CMS staffing intelligence: agency spend identification
  • Automated news & acquisition monitoring

Strategy Guide Website

Live
stampcollectorstrategy.com →

Content site with 40+ guides covering game mechanics, card strategy, and progression. Built with Astro for near-zero JavaScript payload and fast page loads.

Astro Tailwind CSS MDX Docker Nginx AWS
  • Static site generation for sub-second loads
  • Consistent cyberpunk design system
  • SEO optimized with structured data

Browser Automation Framework

In Development

Extensible automation framework with a plugin architecture for multi-site adapters. Configurable behavior profiles with session persistence, proxy rotation, and structured logging.

TypeScript Node.js Playwright YAML
  • Plugin-based adapter architecture
  • Configurable persona/behavior profiles
  • Session persistence & proxy rotation
  • Winston structured logging

Job Market Automation

Active Use

Aggregation tool that collects listings from 5 job platforms in parallel, deduplicates results, and produces scored/ranked reports based on configurable profile matching.

Python Playwright BeautifulSoup
  • 5 platform adapters with parallel execution
  • YAML-driven profile matching & scoring
  • Automated deduplication pipeline
  • Report generation with ranked output

Top Browser Strategy Games

Live
topbrowserstrategygames.com →

SEO-optimized static site with Schema.org structured data, FAQ markup, and retro cyberpunk design. Fully responsive, zero-dependency.

HTML CSS JavaScript
  • Schema.org JSON-LD structured data
  • FAQ markup for rich snippets
  • Mobile-first responsive design

// experience

Where I've Worked

QA Engineer

Serasa Experian
2025 - Present

Building automated end-to-end test suites with Cypress and Cucumber for internal financial applications. Validating data flows and integrations between modern frameworks and legacy Java/AngularJS systems handling sensitive financial data. Working fully in Portuguese.

Software Developer

Acceptable Dev Tech
2023 - 2025

Led development of a video-based platform. Collaborated across design and engineering to ship scalable, high-performance digital solutions.

Founding Partner

Couples English Education
2023 - 2025

Co-founded a language education company serving professionals in Brazil. Taught English, Python programming, Excel, and computer science fundamentals.

Chief Operations Manager

DJ Event Solutions
2017 - 2023

Grew revenue 20% annually through sales funnel optimization. Coordinated 160+ events, recruited and managed high-performing teams.

Web Developer

Theramin
2015 - 2017

Built modular web applications with React and Bootstrap. Implemented authentication, security controls, and responsive interfaces. Company tripled in size during tenure.

Freelance Web Developer

Self-Employed
2014 - 2015

Delivered front-end development, graphic design, and video editing for 8+ clients across 2 states using React, Bootstrap, and WordPress.

// contact

Let's Work Together

Looking for a developer who owns problems end-to-end? I'm available for full-time remote roles and contract work.

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