Nada Sadek - Senior Frontend Engineer (React & TypeScript)

Q: Where is Nada based?

Nada is based in Berlin, Germany .

Q: What languages does Nada speak?

Nada speaks the following languages: Arabic (Native), English (Advanced), German (Intermediate) .

Q: How many years of experience does Nada have?

Nada has at least 10 years of experience. During this time, Nada has worked in at least 5 different roles and for 5 different companies . The average length of individual experience is 2 years and 8 months . Note that Nada may not have shared all experience and actually has more experience.

Q: What is Nada's latest experience?

Nada's most recent position is Freelance Senior Frontend Engineer at Self-Employed .

Q: What companies has Nada worked for in recent years?

In recent years, Nada has worked for Self-Employed , HubSpot , YOC AG , and ReDI School of Digital Integration .

Q: Which industries is Nada most experienced in?

Nada is most experienced in industries like Information Technology , Media and Entertainment , and Education . Nada also has some experience in Advertising .

Q: Which business areas is Nada most experienced in?

Nada is most experienced in business areas like Information Technology , Product Development , and Business Intelligence . Nada also has some experience in Quality Assurance .

Q: Which industries has Nada worked in recently?

Nada has recently worked in industries like Information Technology , Education , and Advertising .

Q: Which business areas has Nada worked in recently?

Nada has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Berlin, Germany

Check rate

Experience

Apr 2026 - Present

3 months

Remote

Freelance Senior Frontend Engineer

Self-Employed

Senior software engineer focused on React, TypeScript and AI-assisted product workflows
Build frontend systems for complex SaaS products, internal tools and operational workflows
Recent work includes AI evaluation tooling, support reliability analysis and developer-focused QA systems
Available for freelance and contract engagements, especially remote-first projects

Aug 2022 - Oct 2025

3 years 3 months

Berlin, Germany

Senior Software Engineer

HubSpot

Owned and delivered complex frontend projects in HubSpot’s Billing domain, from scoping and implementation through testing, rollout and production release.
Led multi-phase refactors of subscription and transaction workflows, reducing frontend complexity and preparing systems for larger platform migrations.
Worked closely with backend, product and design teams on billing flows where frontend behavior affected data correctness, customer experience and support volume.
Improved account and billing experiences through experimentation, UX improvements, safer edge-case handling and metrics-driven product decisions.
Experimented with AI-assisted features using product metrics to evaluate which ideas should be productized.
Mentored engineers through onboarding, PR reviews, growth plans and knowledge sharing in high-risk billing areas.

Apr 2022 - Jul 2022

4 months

Berlin, Germany

Tech Lead

YOC AG

Led and contributed to the development of ad management and delivery systems across frontend and backend.
Built backend services for ad creation and delivery using Node.js, gRPC, REST APIs, GCP and Redis.
Designed and implemented testable UI components for creating, customizing and previewing ads across mobile and desktop formats.
Collaborated with product to plan and ship features for complex advertising workflows.
Mentored engineers and took an active role in engineering hiring, including candidate interviews, technical evaluation and collaboration with HR.

Jan 2020 - Mar 2022

2 years 3 months

Berlin, Germany

Senior Software Engineer

YOC AG

Led and contributed to the development of ad management and delivery systems across frontend and backend.
Built backend services for ad creation and delivery using Node.js, gRPC, REST APIs, GCP and Redis.
Designed and implemented testable UI components for creating, customizing and previewing ads across mobile and desktop formats.
Collaborated with product to plan and ship features for complex advertising workflows.
Mentored engineers and took an active role in engineering hiring, including candidate interviews, technical evaluation and collaboration with HR.

Jan 2019 - Feb 2022

3 years 2 months

Berlin, Germany

JavaScript Instructor

ReDI School of Digital Integration

Taught Introduction to JavaScript.
Supported students throughout the semester.
Interviewed applicants and collaborated with other instructors on course planning.

Jan 2016 - Dec 2019

4 years

Berlin, Germany

JavaScript Developer

SOFTGAMES Mobile Entertainment Services

Built internal tools and dashboards used by different departments to access operational and revenue-related data.
Developed dynamic configuration editors with forms that changed based on user input.
Created reusable React components used across the product.
Visualized revenue and performance data in charts and tables with filters.
Built interfaces that reduced manual operational tasks from hours to minutes.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Media and Entertainment, Education, and Advertising.

Information Technology

Media and Entertainment

Education

Advertising

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, and Business Intelligence.

Information Technology

Product Development

Business Intelligence

Summary

Senior Frontend Engineer with 10 years of experience building complex React and TypeScript applications for SaaS products, internal tools, dashboards, billing workflows and operational interfaces.

I work best on frontend-heavy projects where UI state, backend APIs, product rules and customer-impacting edge cases need to line up correctly. My background includes billing and subscription workflows, refactoring long-lived codebases, improving maintainability, collaborating closely with backend, product and design and shipping production changes safely.

Website: nadasadek.com

Skills

React, Typescript, Javascript, Html, Css/Scss, Accessible And Responsive Frontend Development
Saas Dashboards, Internal Tools, Admin Interfaces And Api-Driven Product Workflows
Billing, Subscription, Entitlement, Account State And Revenue-Critical Frontend Flows
Component Architecture, Design-System Usage, Reusable Ui Components And Complex State Handling
Node.Js, Rest Apis, Graphql, Grpc, Redis, Mysql And Mongodb
Testing With React Testing Library, Jest, Vitest, Cypress, Selenium, Unit, Integration And E2e Tests
Gcp, Netlify, Vercel, Github Actions, Jenkins And Frontend Delivery Workflows

Languages

Arabic

Native

English

Advanced

German

Intermediate

Education

Oct 2010 - Jun 2015

German University in Cairo

Bachelor of Science, Digital Media Engineering and Technology · Digital Media Engineering and Technology · Cairo, Egypt

Statistics

Experience

Total positions 6

Experience in Information Technology 7.5 y

Avg length 2 y 2 m

Longest experience 3 y 11 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Freelance Senior Frontend Engineer, Senior Software Engineer, Tech Lead

Main industries Information Technology, Media and Entertainment, Education

Main business areas Information Technology, Product Development, Business Intelligence

Qualifications

Highest degree Bachelor

Profile

Created

June 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Nada based?

Nada is based in Berlin, Germany.

What languages does Nada speak?

Nada speaks the following languages: Arabic (Native), English (Advanced), German (Intermediate).

How many years of experience does Nada have?

Nada has at least 10 years of experience. During this time, Nada has worked in at least 5 different roles and for 5 different companies. The average length of individual experience is 2 years and 8 months. Note that Nada may not have shared all experience and actually has more experience.

What roles would Nada be best suited for?

Based on recent experience, Nada would be well-suited for roles such as: Freelance Senior Frontend Engineer, Senior Software Engineer, Tech Lead.

What is Nada's latest experience?

Nada's most recent position is Freelance Senior Frontend Engineer at Self-Employed.

What companies has Nada worked for in recent years?

In recent years, Nada has worked for Self-Employed, HubSpot, YOC AG, and ReDI School of Digital Integration.

Which industries is Nada most experienced in?

Nada is most experienced in industries like Information Technology, Media and Entertainment, and Education. Nada also has some experience in Advertising.

Which business areas is Nada most experienced in?

Nada is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Nada also has some experience in Quality Assurance.

Which industries has Nada worked in recently?

Nada has recently worked in industries like Information Technology, Education, and Advertising.

Which business areas has Nada worked in recently?

Nada has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Nada's education?

Nada holds a Bachelor in Digital Media Engineering and Technology from German University in Cairo.

What is the availability of Nada?

Nada is immediately available full-time for suitable projects.

What is the rate of Nada?

Nada's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.