Senior Frontend/Full-Stack Engineer (React, Next.js, TypeScript, Node.js, Express.js)
Aktualisiert am 03.02.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 03.02.2026
Verfügbar zu: 100%
davon vor Ort: 20%
React
Next.js
TypeScript
JavaScript
TailwindCSS
React query
Node.js
Express.js
Frontend Engineering
Full-Stack Engineering
Supabase
Stripe Integration
Prisma
PostgreSQL
English
Muttersprache
German
Grundkenntnisse

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland
möglich

Projekte

Projekte

1 year 1 month
2025-01 - now

Architected and built a multi-tenant financial management

Founder & Software Engineer React Next.js Node.js ...
Founder & Software Engineer
  • Architected and built a multi-tenant financial management SaaS platform for young couples to align on finances. Built primarily to help myself and my wife, but has now grown to 90+ users.
  • Designed the transaction system as the platform?s core data model, powering budgets, accounts, goal tracking, debts, and receivables, with efficient state management and caching using Tanstack Query.
  • Built RESTful APIs with Express.js and Prisma ORM, handling transaction processing, user authentication (JWT), and multi-tenant data isolation at the database level
  • Developed analytics dashboards using Recharts to visualize spending breakdowns, account  growth, net worthtrends, and debt/receivable tracking, with ownership filtering enabling couples to analyze shared and individual finances
  • Implemented CSV import pipelines with column mapping and rule-based auto-categorization, reducing manual categorization effort by ~70%
  • Integrated Stripe API for handling subscriptions, added PWA capabilities for mobile usage, and accelerated feature development using AI-assisted coding tools.
React Next.js Node.js Express.js TypeScript Tanstack Query SaaS Tailwind CSS PostgreSQL JWT Prisma Supabase Recharts Jest Mocha Vercel Render Stripe API integration.
on request
2 years 11 months
2022-05 - 2025-03

Developed and optimized core features

Senior Frontend Engineer Vue.js Python Django ...
Senior Frontend Engineer
  • Developed and optimized core features of an AI-powered B2B multi-tenant conversation intelligence SaaS platform using Vue.js, improving sales team efficiency with a 10% increase in call activity and a 43% boost in conversion rates.
  • Designed and implemented secure, scalable REST APIs with Django Rest Framework, including database modeling, custom serializers, and permissions logic to support platform-wide multi-tenancy.
  • Wrote comprehensive unit tests with Jest and upheld code quality through code reviews and pair-programming, fostering knowledge sharing and engineering best practices.
  • Led the development and maintenance of a Vue-based Chrome extension, enabling seamless integration with CRM systems such as HubSpot, Salesforce, and Microsoft Dynamics, reducing documentation time by 80%
Vue.js Python Django Vuex Docker MicroServices PostgreSQL Jest REST APIs Git Chrome Extensions SCSS Scrum.
bao Solutions GmbH
Munich, Germany
9 months
2023-08 - 2024-04

Designed and implemented

CTO & Co-founder React Next.js Node.js ...
CTO & Co-founder
  • Led and mentored a team of 3 engineers and a product designer, fostering collaboration across frontend and backend teams to deliver high-quality, custom LMS features that increased teacher engagement by 20%.
  • Architected and developed responsive and accessible frontend features using React and Next.js, achieving an SEO-optimized user interface.
  • Designed and implemented backend solutions with Node.js (Express.js) and PostgreSQL, ensuring secure data management and seamless frontend-backend integration.
  • Enhanced system performance and security by leveraging AWS S3 for scalable storage of course materials and Amazon CloudFront for fast, localized access. Implemented AWS-signed URLs to securely stream content without allowing downloads, ensuring both performance and protection of intellectual property.
  • Aligned technical execution with the platform?s mission of making teacher training affordable and accessible, ensuring engineering decisions directly supported educational impact.

React Next.js Node.js Express.js TypeScript React-query Tailwind CSS AWS S3 AWS CloudFront Git PostgreSQL SEO Nanostores Scrum.
on request
9 months
2021-07 - 2022-03

Delivered multiple client projects

Frontend Engineer React Vue.js Nuxt.js ...
Frontend Engineer
  • Delivered multiple client projects, including dashboards, admin portals, and SaaS applications, building responsive and scalable interfaces in React and Vue.
  • Optimized frontend performance by reducing bundle sizes up to 70% and improving load times by 60% across projects.
  • Maintained Top-Rated Plus status on Upwork (top 3% of freelancers globally) through consistent delivery, strong communication, and long-term client satisfaction
React Vue.js Nuxt.js Docker Webpac
6 months
2021-05 - 2021-10

dashboard and design of the website

Frontend Engineer Vue.js Nuxt.js Vuex ...
Frontend Engineer
  • Led the rebuild of the dashboard and design of the website using the Nuxt.js framework, creating responsive UIs across browsers, improving accessibility, and ensuring great user experiences on both mobile and web
Vue.js Nuxt.js Vuex SCSS SEO
1 year 1 month
2020-03 - 2021-03

frontend application using

Frontend Engineer Vue.js Webpack Fusion charts ...
Frontend Engineer
  • Built the v1 frontend application using Vue.js, achieving a Time to Interactive (TTI) of 1.6s and a Lighthouse performance rating of over 80% using advanced optimizations with Webpack, lazy loading, and module scoping.
  • Built real-time IoT dashboards and live map views using Websockets, allowing users to track and monitor their IoT devices in real-time, with zero lag.
Vue.js Webpack Fusion charts Websockets Google Maps API Bootstrap Vuex.

Aus- und Weiterbildung

Aus- und Weiterbildung

3 months
2020-10 - 2020-12

Data Structures

University of California, United States (via Coursera).
University of California, United States (via Coursera).
2 months
2020-08 - 2020-09

Algorithmic Toolbox

University of California, United States (via Coursera).
University of California, United States (via Coursera).
3 years 11 months
2014-09 - 2018-07

Bachelor of Science

Mechanical Engineering, University of Lagos, Nigeria
Mechanical Engineering
University of Lagos, Nigeria

Kompetenzen

Kompetenzen

Top-Skills

React Next.js TypeScript JavaScript TailwindCSS React query Node.js Express.js Frontend Engineering Full-Stack Engineering Supabase Stripe Integration Prisma PostgreSQL

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Senior Frontend Engineer with 6 years of experience building responsive, accessible, and high-performance web applications. Specialized in modern JavaScript frameworks such as React, Next.js, with a focus on scalable SaaS applications and complex, but simple-looking dashboards. Comfortable working across the stack with backend experience using Node.js, Express, and PostgreSQL.


Technical Skills:

  • Frontend: React, Next.js, Redux, Tanstack Query, Tailwind CSS, Bootstrap, Motion.
  • Backend: Node.js, Express.js, PostgreSQL, Supabase, Prisma, RESTful APIs, JWT.
  • DevOps and Tools: Git, Jest, Mocha, Figma, Sentry.
  • Cloud & Hosting: AWS (S3, CloudFront), Vercel, Render.

Programmiersprachen

JavaScript
TypeScript
HTML
CSS
Sass

Branchen

Branchen

FinTech, HealthTech, EdTech and Sales

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland
möglich

Projekte

Projekte

1 year 1 month
2025-01 - now

Architected and built a multi-tenant financial management

Founder & Software Engineer React Next.js Node.js ...
Founder & Software Engineer
  • Architected and built a multi-tenant financial management SaaS platform for young couples to align on finances. Built primarily to help myself and my wife, but has now grown to 90+ users.
  • Designed the transaction system as the platform?s core data model, powering budgets, accounts, goal tracking, debts, and receivables, with efficient state management and caching using Tanstack Query.
  • Built RESTful APIs with Express.js and Prisma ORM, handling transaction processing, user authentication (JWT), and multi-tenant data isolation at the database level
  • Developed analytics dashboards using Recharts to visualize spending breakdowns, account  growth, net worthtrends, and debt/receivable tracking, with ownership filtering enabling couples to analyze shared and individual finances
  • Implemented CSV import pipelines with column mapping and rule-based auto-categorization, reducing manual categorization effort by ~70%
  • Integrated Stripe API for handling subscriptions, added PWA capabilities for mobile usage, and accelerated feature development using AI-assisted coding tools.
React Next.js Node.js Express.js TypeScript Tanstack Query SaaS Tailwind CSS PostgreSQL JWT Prisma Supabase Recharts Jest Mocha Vercel Render Stripe API integration.
on request
2 years 11 months
2022-05 - 2025-03

Developed and optimized core features

Senior Frontend Engineer Vue.js Python Django ...
Senior Frontend Engineer
  • Developed and optimized core features of an AI-powered B2B multi-tenant conversation intelligence SaaS platform using Vue.js, improving sales team efficiency with a 10% increase in call activity and a 43% boost in conversion rates.
  • Designed and implemented secure, scalable REST APIs with Django Rest Framework, including database modeling, custom serializers, and permissions logic to support platform-wide multi-tenancy.
  • Wrote comprehensive unit tests with Jest and upheld code quality through code reviews and pair-programming, fostering knowledge sharing and engineering best practices.
  • Led the development and maintenance of a Vue-based Chrome extension, enabling seamless integration with CRM systems such as HubSpot, Salesforce, and Microsoft Dynamics, reducing documentation time by 80%
Vue.js Python Django Vuex Docker MicroServices PostgreSQL Jest REST APIs Git Chrome Extensions SCSS Scrum.
bao Solutions GmbH
Munich, Germany
9 months
2023-08 - 2024-04

Designed and implemented

CTO & Co-founder React Next.js Node.js ...
CTO & Co-founder
  • Led and mentored a team of 3 engineers and a product designer, fostering collaboration across frontend and backend teams to deliver high-quality, custom LMS features that increased teacher engagement by 20%.
  • Architected and developed responsive and accessible frontend features using React and Next.js, achieving an SEO-optimized user interface.
  • Designed and implemented backend solutions with Node.js (Express.js) and PostgreSQL, ensuring secure data management and seamless frontend-backend integration.
  • Enhanced system performance and security by leveraging AWS S3 for scalable storage of course materials and Amazon CloudFront for fast, localized access. Implemented AWS-signed URLs to securely stream content without allowing downloads, ensuring both performance and protection of intellectual property.
  • Aligned technical execution with the platform?s mission of making teacher training affordable and accessible, ensuring engineering decisions directly supported educational impact.

React Next.js Node.js Express.js TypeScript React-query Tailwind CSS AWS S3 AWS CloudFront Git PostgreSQL SEO Nanostores Scrum.
on request
9 months
2021-07 - 2022-03

Delivered multiple client projects

Frontend Engineer React Vue.js Nuxt.js ...
Frontend Engineer
  • Delivered multiple client projects, including dashboards, admin portals, and SaaS applications, building responsive and scalable interfaces in React and Vue.
  • Optimized frontend performance by reducing bundle sizes up to 70% and improving load times by 60% across projects.
  • Maintained Top-Rated Plus status on Upwork (top 3% of freelancers globally) through consistent delivery, strong communication, and long-term client satisfaction
React Vue.js Nuxt.js Docker Webpac
6 months
2021-05 - 2021-10

dashboard and design of the website

Frontend Engineer Vue.js Nuxt.js Vuex ...
Frontend Engineer
  • Led the rebuild of the dashboard and design of the website using the Nuxt.js framework, creating responsive UIs across browsers, improving accessibility, and ensuring great user experiences on both mobile and web
Vue.js Nuxt.js Vuex SCSS SEO
1 year 1 month
2020-03 - 2021-03

frontend application using

Frontend Engineer Vue.js Webpack Fusion charts ...
Frontend Engineer
  • Built the v1 frontend application using Vue.js, achieving a Time to Interactive (TTI) of 1.6s and a Lighthouse performance rating of over 80% using advanced optimizations with Webpack, lazy loading, and module scoping.
  • Built real-time IoT dashboards and live map views using Websockets, allowing users to track and monitor their IoT devices in real-time, with zero lag.
Vue.js Webpack Fusion charts Websockets Google Maps API Bootstrap Vuex.

Aus- und Weiterbildung

Aus- und Weiterbildung

3 months
2020-10 - 2020-12

Data Structures

University of California, United States (via Coursera).
University of California, United States (via Coursera).
2 months
2020-08 - 2020-09

Algorithmic Toolbox

University of California, United States (via Coursera).
University of California, United States (via Coursera).
3 years 11 months
2014-09 - 2018-07

Bachelor of Science

Mechanical Engineering, University of Lagos, Nigeria
Mechanical Engineering
University of Lagos, Nigeria

Kompetenzen

Kompetenzen

Top-Skills

React Next.js TypeScript JavaScript TailwindCSS React query Node.js Express.js Frontend Engineering Full-Stack Engineering Supabase Stripe Integration Prisma PostgreSQL

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Senior Frontend Engineer with 6 years of experience building responsive, accessible, and high-performance web applications. Specialized in modern JavaScript frameworks such as React, Next.js, with a focus on scalable SaaS applications and complex, but simple-looking dashboards. Comfortable working across the stack with backend experience using Node.js, Express, and PostgreSQL.


Technical Skills:

  • Frontend: React, Next.js, Redux, Tanstack Query, Tailwind CSS, Bootstrap, Motion.
  • Backend: Node.js, Express.js, PostgreSQL, Supabase, Prisma, RESTful APIs, JWT.
  • DevOps and Tools: Git, Jest, Mocha, Figma, Sentry.
  • Cloud & Hosting: AWS (S3, CloudFront), Vercel, Render.

Programmiersprachen

JavaScript
TypeScript
HTML
CSS
Sass

Branchen

Branchen

FinTech, HealthTech, EdTech and Sales

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