Hi, I'm

Jakob Neild.

Solutions engineer. 12 years owning products end-to-end. System design, data pipelines, DevOps, and production infrastructure.

TypeScript React NestJS Node.js PostgreSQL Docker AWS
Jakob Neild

// about

End-to-End Ownership

I've shipped production systems across SaaS, gaming, education, and data intelligence, owning architecture, infrastructure, testing, and deployment at every stage. I've solo-shipped a multiplayer MMO, built ETL pipelines processing 120K+ federal records, and designed automation frameworks. I operate wherever the problem needs solving.

Currently a QA Engineer at Serasa Experian, defining test strategies for financial applications handling sensitive data. I've led product development for SaaS platforms, managed production infrastructure on AWS, and coordinated cross-functional teams.

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

Architecture & Design
System Design API Design Real-Time Systems Data Modeling
Infrastructure & DevOps
Docker AWS EC2 Nginx CI/CD Linux SSL/TLS
Data Engineering
PostgreSQL Redis PostGIS Prisma ETL Pipelines
Testing & Quality
Cypress Jest Playwright Cucumber
Languages & Frameworks
TypeScript Python Java React NestJS Next.js

// projects

What I've Built

Stamp Collector Simulator

Live
stampcollectorsimulator.com →

Solo-shipped a production multiplayer MMO, owning every layer: game design, system architecture, CI/CD, and production monitoring. Real-time 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-owned full product and deployment lifecycle
  • Real-time SSE with distributed resolver engine
  • Dockerized infrastructure with Nginx reverse proxy on AWS
  • JWT + OAuth, rate limiting, Helmet.js security hardening

Browser Strategy Games

Live
browserstrategygames.com →

SEO-optimized directory of the top 10 free browser strategy games. Data-driven Astro site with individual game pages, structured JSON-LD, FAQ schema, and a sitemap — built to rank and funnel traffic to niche strategy titles.

Astro TypeScript Nginx AWS EC2
  • Data-driven static pages via Astro content templates
  • Schema.org VideoGame + FAQ structured data for rich results
  • Full SEO stack: canonical URLs, OG tags, sitemap, robots.txt
  • 301 redirect handling for legacy .html URLs

English by Jake

Live
englishbyjake.com →

Solo-built a full-featured ESL platform for Brazilian learners with adaptive placement testing, 6 interactive exercise types, gamification with XP and streaks, and Stripe payments supporting PIX, Boleto, and cards. 26 pages, 50 components, 23 API routes, and a Portuguese-localized interface.

Next.js TypeScript PostgreSQL Prisma Stripe NextAuth AWS
  • Full platform: auth, payments, learning modules, admin panel
  • Adaptive placement test that calibrates CEFR level
  • Stripe with PIX + Boleto Bancário for Brazilian payments
  • PT-BR localization with 370+ translation keys

Elder Care Data Intelligence

In Development

Designed a data platform to surface high-value B2B sales opportunities from fragmented federal datasets. Aggregates ~120K elder care facilities from 5 sources, deduplicates with multi-tier fuzzy matching, geocodes with spatial query support, and scores leads using CMS staffing and financial signals.

Python PostgreSQL PostGIS Docker
  • End-to-end pipeline: ingestion → dedup → geocoding → scoring
  • 5-tier deduplication (exact, fuzzy, Jaro-Winkler)
  • Weighted lead scoring with portfolio & staffing analysis
  • Census Bureau + Nominatim geocoding pipeline

Castle Smash

Completed

Co-led development of a multiplayer Roblox PvP game over 370+ combined hours, managing the full production pipeline: task planning, team coordination, weekly standups, and asset creation alongside client-server game architecture.

Lua Roblox Studio GIMP
  • Managed full production pipeline across 2-month sprint
  • Client-server architecture with real-time multiplayer
  • Hundreds of custom rasterized game assets
  • Team coordination: task tracking, standups, personnel management

Pixel Grid

Completed

Built and deployed an MVP in under 12 hours: requirements, design, implementation, and deployment. Pixel-based advertising grid inspired by the Million Dollar Homepage with dynamic cell claiming and automatic image processing.

Next.js Supabase Vercel
  • Concept to deployed MVP in under 12 hours
  • Full ownership: requirements → design → ship
  • Image upload with automatic crop and resize
  • Mobile-responsive design

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

// experience

Where I've Worked

QA Engineer

Serasa Experian
2025 - Present

Defining and executing end-to-end test automation strategy for internal financial applications. Architecting test suites across modern frameworks and legacy Java/AngularJS systems, validating data integrity flows for sensitive financial data at scale. Working fully in Portuguese.

Software Developer & Technical Lead

Acceptable Dev Tech
2023 - 2025

Led product development for a video-based SaaS platform. Owned technical architecture decisions, managed the development roadmap, and coordinated across design and engineering to deliver production releases. Separately managed a 3-month SaaS project for a São Paulo-based client.

Founding Partner

Couples English Education
2023 - 2025

Co-founded a language education company serving professionals in Brazil. Built and maintained the full technology platform while managing curriculum, client relationships, and business operations.

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, and owned end-to-end operational delivery.

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.

// community

The Pipeline Dev Group

A community of developers, engineers, founders, and technology enthusiasts dedicated to learning, sharing knowledge, and exploring the technologies shaping our world. Every two weeks, we host technical discussions led by industry professionals on topics including software engineering, AI, cloud infrastructure, cybersecurity, systems architecture, data engineering, and entrepreneurship.

// recent discussions

  • Introduction to Linux

    Distributions, filesystems, permissions, package management, and command-line fundamentals.

  • Building Octagon Analytics

    Deep dive into analytics platforms, data pipelines, automation, infrastructure, and production system design.

// upcoming

June 24, 2026

Modern Memory Allocation

Presented by Andre Fontenele. How modern languages approach memory management: garbage collection, ownership models, performance tradeoffs, and building safe, efficient software in 2026.

// contact

Let's Work Together

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

LinkedIn