Full-Stack Engineer · 7+ Years · Web & Mobile
Skip the agency.
Hire the engineer.
Idea to production-ready app in 3 months, for $30k. A senior full-stack engineer who's been building real products since before AI could write a for-loop. No account managers. No junior devs. No markup.
What I build
One engineer.
Full product scope.
From architecture decisions to the last pixel of UI, I cover the full stack so you don't end up with 3 contractors who don't talk to each other.
Web Applications
Full-stack web apps built with React, Next.js, and Node.js or Rails backends. Multi-tenant SaaS, dashboards, marketplaces, productivity tools. Designed to scale from day one.
Mobile Apps
Cross-platform mobile with Flutter or React Native. One codebase, iOS and Android. I've shipped apps in production, not just prototypes.
API & Backend Systems
Robust REST or GraphQL APIs. Authentication, payments, third-party integrations, background jobs, and real-time features. Built with clean architecture that doesn't fall apart at scale.
Rescue & Takeover
Got a vibe-coded app that's held together with duct tape and prayers? I audit, refactor, and rebuild the parts that matter without torching what's already working.
The process
Idea to launch
in 3 months.
A structured sprint with clear milestones. You always know exactly what's being built, when, and why. No surprises.
Week 1
Discovery & Architecture
We define scope, data models, and the technical blueprint. You sign off before a single line of code is written.
Week 2-5
Core Build
The engine: authentication, data layer, core features, and API. AI-assisted where it speeds things up, engineered where it matters.
Week 6-10
UI, Features & Integrations
Frontend, user flows, third-party integrations (payments, notifications, analytics). Weekly demos so you stay in the loop.
Week 11-12
Testing, Polish & Launch
QA, performance tuning, documentation, deployment. You get a live product, not a Figma file.
Investment
Clear pricing.
No hidden fees.
Every engagement is fixed scope, fixed price. You know what you're getting and what you're paying before we start.
Rescue & Audit
1-3 weeks
Fix My Existing App
- Full codebase audit report
- Performance & security review
- Prioritized fix roadmap
- Optional: hands-on refactoring
- Handoff documentation
★ Flagship Offer
3 months · Full product sprint
Idea to Production App
- Technical discovery & architecture
- Full-stack web or mobile build
- Up to 8 core feature modules
- Auth, payments, integrations
- Weekly video demos
- Deployment & documentation
- 30-day post-launch support
Ongoing
Monthly retainer · min 3 months
Engineering Partner
- ~40hrs/month dedicated time
- Feature development & iteration
- Bug fixes & maintenance
- Tech strategy & consulting
- Slack access during business hours
Tech stack
I pick the right tool.
Not the trendy one.
7+ years means I've been burned by bad choices before. The stack I use is proven in production, not just popular on Twitter.
TypeScript
React
Next.js
Flutter
Ruby on Rails
Node.js
React Native
PostgreSQL
GraphQL
Prisma
Tailwind CSS
Firebase
Docker
Vercel
Dart
Kotlin
Swift
PostHog
Sentry
StripeWhat people say
Clients remember.
They come back.
Real feedback from real people. Teammates, clients, and colleagues who've seen the work firsthand.
“Well damn, you went above and beyond. Engineer of the day.
“You are the best engineer with design skills that I know.
“2 projects, 2 channels. Legend!
“I worked with Nifemi 4 years ago on a mobile game. When I needed to build a new web game, he was the first — and only — call I made.
Repeat client · 4 years later
Selected work
Real products.
Recognizable names.
From private social networks to AI hiring platforms to luxury fitness apps. Built across teams, industries, and tech stacks.
Social Network · iOS & Android
TAPP Social
Private, invite-only social network built for real privacy: no ads, no public search, no data selling. I led development of the mobile apps across both platforms, building real-time chat with end-to-end encryption, the social feed algorithm, and the core social graph.
Real-time encrypted messaging + feed algorithm. The two hardest things to get right in social apps, shipped in one product.
Health & Wellness · Mobile App
myNutrafol App
Companion mobile app for Nutrafol, the #1 dermatologist-recommended hair growth supplement brand. Built as part of a larger engineering team. The app gives subscribers personalized progress tracking, daily habit tools, expert consultations, and an exclusive rewards system.
Nutrafol is trusted by 1,500+ physicians. The myNutrafol app is their subscriber experience layer, built for scale and consistency.
Fitness Tech · Member App
Midtown Athletic Club
Mobile app for one of the US's premier luxury athletic club chains. Built as part of a larger team. Members use it to book classes, reserve amenities, manage accounts, discover events, and access exclusive offers across multiple club locations.
Multi-location, multi-amenity booking platform serving thousands of premium members across club locations in the US.
AI SaaS · Team Lead
EnergyHire
Led development of the main platform for an AI-powered energy sector talent marketplace. EnergyHire connects energy companies with specialized professionals using ML-driven matching, a job description generator, resume scoring, and candidate-employer fit algorithms.
Team lead on the core platform. AI-driven recruitment built for an industry that generic job boards don't understand.
SaaS · Admin Feature
Preppr.ai
Built a Free Trial Access Management system with full admin controls: approve/deny requests, automated email notifications, access code generation, and a dedicated super admin panel for staff with role-based access.
"Well damn, you went above and beyond. Engineer of the day." - Justin, client
Web Game · Mobile-First
The Movie Chain
Mobile-focused web game built for a repeat client. The same client who hired me 4 years earlier for a native mobile game came back specifically to build this. A trust signal that speaks for itself.
Repeat client, 4 years later. First a native mobile game, then a web game. Same engineer, different platform, same trust.
SaaS · Founder
tem mimo
Multi-tenant loyalty SaaS platform I founded and built from scratch. Handles multiple businesses, multiple loyalty programs, and real user data on one platform. Every architecture decision, product choice, and line of code is mine.
Built as a founder, not a contractor. I know what it costs to own a product, and build accordingly.
Technical Writing · Series
DDD Clean Architecture in Flutter
Published a multi-part technical series on Domain-Driven Design and Clean Architecture in Flutter, covering Presentation, Domain, Infrastructure, and Application layers through to Dependency Injection.
Engineers who write about architecture think about it differently. I don't just build. I understand why the decisions matter.
Rescue service
Vibe coded it.
Now what?
Got an app held together with duct tape and prayers? I audit, refactor, and rebuild the parts that matter without torching what's already working.
Get a Rescue Quote →About Nifemi
The engineer
behind the work.
I'm Nifemi, a senior full-stack engineer and software architect with 7+ years building production software across web, mobile, and backend. I've worked on everything from early-stage MVPs to multi-tenant SaaS platforms serving real users.
At Fetchly Labs, I grew from engineer to architect over 4+ years, owning technical decisions across multiple client products. I also founded tem mimo, a multi-tenant loyalty SaaS platform, so I understand what it means to build something you actually have to maintain and grow.
I use AI tools to move faster. I use engineering discipline to make sure the result is something you can actually trust. That combination is what “AI-accelerated, not AI-replaced” means in practice.
Based in Brazil (GMT-3). I overlap comfortably with US Eastern, Central, Mountain, and Pacific time, as well as UK (GMT) and European (CET) teams.
Get in touch
Let's build
something real.
Tell me what you're building. I'll tell you honestly whether I can help, what the scope looks like, and what it'll cost. No sales pitch. No bait-and-switch.