SOFTWARE STUDIO • SENIOR FULL STACK ENGINEERING

High-performance software engineering without bureaucracy.

Accelerated, refined engineering for scalable APIs, React Native mobile apps, perfect-score Web Vitals landing pages e complete SaaS products. You talk and negotiate directly with the engineer writing the code.

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100% Web Vitals

Ultra-fast pages < 1.0s

React Native & Expo

iOS & Android in a unified codebase

APIs & Microservices

Sub-millisecond latency with Bun & Node

Senior Engineer

1-on-1 communication & agile delivery

WHAT WE DO

Specialties crafted with technical mastery

Surgical focus on four key domains where an experienced solo developer outperforms entire teams in agility, cost, and delivery quality.

Scalability & Resilience

High-Performance APIs & Backend

Robust, secure architectures with sub-millisecond latency

Development of microservices, RESTful and GraphQL APIs engineered for heavy workloads, featuring intelligent caching, enterprise-grade security, and interactive Swagger/OpenAPI documentation.

What's included:

Scalable cloud microservices and serverless architectures (AWS / GCP)

Strongly-typed RESTful and GraphQL APIs

Asynchronous event processing with queues (RabbitMQ & Kafka)

Optimized relational & in-memory data modeling (PostgreSQL / Redis)

Container orchestration with Docker and Kubernetes

Rigorous JWT, OAuth2, and RBAC authentication

NestJSElysiaGraphQLRabbitMQKafkaAWSGCPKubernetesPostgreSQLRedis

Quote APIS

iOS & Android

Mobile Apps with React Native & Expo

100% native feel for iOS and Android in a single codebase

Fluid mobile applications with offline-first support, 60/120fps hardware-accelerated animations, native device integrations, and end-to-end publishing on the Apple App Store and Google Play Store.

What's included:

Agile file-based routing with Expo Router

Butter-smooth animations with Reanimated & Gestures

Push notifications, geolocation, and biometric authentication

Automated EAS Build pipelines and store submissions

React NativeExpoTypeScriptZustandEAS Build

Quote MOBILE

Time to Market

End-to-End SaaS Products

From database and billing to a polished user interface ready to scale

Rapid delivery of MVPs and full-scale SaaS platforms: multi-tenant architecture, automated subscription billing with Stripe, interactive analytical dashboards, webhooks, and modern administration consoles.

What's included:

Recurring payment processing and seamless checkouts

Interactive data visualization dashboards and analytics

Scalable multi-tenant infrastructure

Comprehensive administrative management console

Next.jsReactVitePostgreSQLStripeTailwind CSS

Quote SAAS

100% Web Vitals & SEO

Conversion Landing Pages & Websites

Minimalist design, 100% Google Web Vitals, and sales-focused

Instant loading pages (< 1.2s), technical SEO tuned for top Google rankings, visually captivating copy, and lead generation forms integrated directly into your sales pipeline.

What's included:

Perfect 100/100 Lighthouse performance score

Structured OpenGraph and Schema.org metadata

High-converting micro-interactions that engage visitors

Static pre-rendering with global CDN edge caching

Next.jsTailwind CSSMotionVercel / Cloudflare

Quote LANDING

PRODUCTS & SUCCESS STORIES

Real-world software in production

Explore solutions crafted by tamagolabs. Focused on clean code, ultra-performant local-first architectures, and applied artificial intelligence.

Engineer's Personal Portfolio

OFFICIAL PRODUCT • IN PRODUCTIONMobile App • React Native & AI

GymUp

Gamified fitness mobile application powered by generative AI (Google Gemini)

A comprehensive, high-performance mobile app architected local-first with SQLite and React Native via Expo. Features intelligent custom workout generation using Google Gemini 3.8 Flash, an algorithmic Smart Overload progressive overload engine, full gamification with XP and achievement badges, PDF progress reports, and in-app subscriptions powered by RevenueCat.

60 FPS Native

Performance

Local-First (SQLite)

Architecture

Google Gemini 3.8

Intelligence

RevenueCat IAP

Monetization

React NativeExpo 57React 19TypeScriptGoogle Gemini AIExpo SQLiteRevenueCatBiomeFirebase

View on Google Play Store Request a Custom App

Proprietary Software

Engineering Highlights & Features

Intelligent workout generation and muscle split design powered by Google Gemini 3.8 Flash

100% offline-first architecture with secure Expo SQLite persistence and memory caching

Gamification system: Level progression, discipline streaks, and unlockable achievements

Smart Overload: Progression algorithm analyzing previous workouts for safe weight increases

PDF Reports: Visual export of training analytics for nutritionists and personal trainers

Freemium Monetization: In-app subscriptions integrated with RevenueCat for App Store and Google Play

Architecture: Local-First100% Offline Ready

TAILORED DEVELOPMENT FOR YOUR BUSINESS

Need a Mobile App, SaaS, API, or Landing Page?

GymUp showcases the code quality, speed, and craftsmanship of tamagolabs. To review the complete portfolio of software systems built by Bruno Fukumori over the past 10+ years, visit his individual portfolio.

Request a Quote View Dev Portfolio

THE SOLO FOUNDER ADVANTAGE

Why Hire a Senior Solo Engineer Over an Agency?

Cut through traditional agency bureaucracy. Collaborate directly with an engineer who possesses a holistic product vision and the technical rigor to deliver.

100% Direct Communication

Traditional Agencies:Endless meetings with account managers who relay messages to POs, who then pass them to junior devs.

With tamagolabs:You talk directly with the engineer who architects and writes every line of code. Zero noise and zero miscommunication.

Decisions made in minutes, not weeks.

Learn more

Startup-Level Execution Velocity

Traditional Agencies:Bureaucratic red tape, sluggish approvals, and months just to get an MVP deployed.

With tamagolabs:Continuous delivery in rapid sprints. From initial commit to production in record time with Bun, Next.js, and Expo.

Up to 60% faster time to first launch.

Learn more

Senior Architecture & Craftsmanship

Traditional Agencies:Projects handed off to inexperienced interns or revolving outsource contractors.

With tamagolabs:Consistent senior quality from start to finish. Clean, strongly-typed, modular code ready for team expansion.

Zero hidden technical debt.

Learn more

Real Cost Efficiency

Traditional Agencies:You pay for fancy agency offices, executives, sales commissions, and management overhead.

With tamagolabs:You invest purely in high-output, top-tier software engineering hours.

Significantly higher return on investment (ROI).

Learn more

TECHNOLOGIES & TOOLING

Full Stack, Cloud & Modern Engineering Ecosystem

Curated technologies chosen for rapid development velocity, peak runtime performance, and effortless long-term maintainability.

Next.jsfrontend

App Router, Server Actions, SSR/SSG and Turbopack

Reactfrontend

Modern components, advanced hooks, and ecosystem

React Nativemobile

Native iOS & Android with Expo and Reanimated

TypeScriptfrontend

Strict typing, interfaces, and solid architecture

NestJSbackend

Enterprise modular architecture, decorators, and dependency injection

Elysiabackend

Ultra-fast Bun framework with end-to-end type safety

GraphQLbackend

Efficient queries, typed schemas, and graph-oriented architecture

RabbitMQinfra

Asynchronous messaging, AMQP task queues, and resilient pub/sub

Apache Kafkainfra

Distributed event streaming, high-throughput processing, and logs

AWSinfra

Scalable cloud architecture (ECS, Lambda, S3, RDS, CloudFront)

GCPinfra

Google Cloud Platform (Cloud Run, GKE, Cloud SQL, and BigQuery)

Kubernetesinfra

Microservices orchestration, auto-scaling, and resilience

Bunbackend

High-speed runtime, package manager, and bundler

Node.jsbackend

Asynchronous APIs, microservices, and payment integrations

Vitefrontend

Blazing fast build tooling and modern bundling for SPAs

Tailwind CSSfrontend

Performant design systems and fluid interfaces

PostgreSQLinfra

Relational modeling, indexing, and optimized queries

Redisinfra

Low-latency in-memory cache and async queues

Expo EASmobile

Automated build pipelines, credentials, and app store deployment

Dockerinfra

Containerization, isolated and reproducible environments

Stripebackend

Recurring subscriptions, checkouts, and secure webhooks

Motionfrontend

Hardware-accelerated declarative animations

bun run --filter @tamagolabs/studio build:production

100% Type-Safe Zero-runtime bloat Edge Ready

SOFTWARE ENGINEER

WHO BUILDS YOUR PROJECT

Bruno Fukumori

Senior Full Stack Software Engineer & Founder

Over a decade of experience translating complex requirements into lightweight, scalable architectures and refined user experiences. Direct engineering from databases and APIs to store-ready mobile apps. At tamagolabs, you don't deal with account intermediaries or rotating agency staff. I personally guide the technical strategy and execute end-to-end with radical transparency.

Full Personal Portfolio GitHub LinkedIn

THE BRAND CONCEPT

Why "tamagolabs"?

In Japanese, Tamago (卵) means egg. To us, it represents the incubation of digital products: we take your embryonic idea, structure every architectural layer with precision and care, until it hatches and emerges into the market as robust, scalable, high-converting software.

Ideation & IncubationSolid EngineeringHatching & Scale

tamagolabs mascot - Kitten inside high-tech egg

FREQUENTLY ASKED QUESTIONS

Everything you need to know before we begin

Total transparency from day one. If your question isn't answered here, feel free to reach out via WhatsApp.

100% yours. Upon completion of each project milestone, all GitHub/GitLab repositories, documentation, and cloud infrastructure are fully transferred to your ownership. Zero agency lock-in.

LET'S TALK

Ready to turn your idea into real software?

Fill out the form below to receive a technical breakdown and estimate, or reach out directly through your preferred channel today.

Quick Contact Channels

Prefer an informal conversation without filling out forms? Feel free to pick whichever channel suits you best.

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Response time:< 2 hours

Location:São Paulo, Brazil • Global Delivery

Engagement Model:Fixed Scope or Retainer