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Seif Ghezala

Fullstack web developer

Can work in or around Berlin

  • 52.517
  • 13.3888
  • Suggested rate €720 / day
  • Experience 2-7 years
  • Response rate 100%
  • Response time A few days
Propose a project The project will begin once you accept Seif's quote.
Propose a project The project will begin once you accept Seif's quote.

Location and workplace preferences

Berlin, Germany
Can work onsite in your office in
  • around Berlin and 50km


Project length
  • ≤ 1 week
  • ≤ 1 month
  • Between 1-3 months
  • Between 3-6 months
  • ≥ 6 months
Business sector
  • Aviation & Aerospace
  • Digital & IT
  • Agriculture
  • Architecture & Urban Planning
  • Arts & Crafts
+46 autres
Company size
  • 1 person
  • 2-10 people
  • 11 - 49 people
  • 50 - 249 people
  • 250 - 999 people
+2 autres


Freelancer code of conduct signed
Read the Malt code of conduct

Verified email



Github : siffogh siffogh
  • 42 Repos
  • 12 Gists


  • English

    Native or bilingual

  • French

    Native or bilingual

  • Arabic

    Native or bilingual


Skills (17)

  • Languages
  • Beginner Intermediate Advanced
    Omar Benseddik
  • CSS
    Beginner Intermediate Advanced
    Omar Benseddik
  • Beginner Intermediate Advanced
  • Beginner Intermediate Advanced

Seif in a few words

Senior full-stack web developer specialized in frontend with a focus on React.

I have experience in companies such as Zalando (top e-commerce in Europe) and Ahrefs (the top SEO tool in the market).

I am also the co-founder of Tinloof, a web development, and design agency based in Berlin, Germany.


Tax Advisor

Digital & IT

Senior frontend developer

Berlin, Germany

January 2022 - February 2022 (1 month)

Tax Advisor is a directory of hundreds of tax consultants in Germany. Users can filter and search by location and languages spoken. We built it with Next.js, Typescript and Sanity.

The content is managed on Sanity, a headless CMS from which we can change text, SEO attributes, and the displayed tax advisors.

As usual, we make sure to attain the highest scores on Google Lighthouse, and this was no exception. The scores are 100 in all categories for both mobile and desktop.

Sendinblue - Sendinblue Global

Digital & IT

Senior Frontend Developer

Berlin, Germany

August 2021 - Today (11 months)

Sendinblue is a marketing tool used for email marketing, CRM, Facebook ads, retargeting, and SMS marketing.

We've joined their team to improve Core Web Vitals and implement Next.js projects, like the Carbon Footprint landing page.

We've built the page with Core Web Vitals and Lighthouse optimizations in mind, and managed to secure 90+ scores.

Aside from the Carbon Footprint project, we've also supported Sendinblue's engineering team in multiple projects:

-Main website
-Partners directory
-Competitors landing pages
-Components library

Our involvement was varied in nature and involved consultancy, fixing bugs, and creation of new features.


Digital & IT

Senior fullstack developer

City of London, United Kingdom

August 2021 - Today (11 months)

Case study page:

Zego is a commercial motor insurance provider that powers opportunities for businesses to self-employed drivers and riders.

They approached me to help them better manage their content by migrating it to Sanity and rebuilding the website to leverage that.

The scope of work included:

- Re-implement the website with Next.js.
- Setup Sanity CMS.
- Write a script to migrate thousands of blog posts to Sanity CMS.
- Add support for custom blocks (Quick Estimate forms, Youtube videos, etc.) in the blog.
- Integrate Sanity CMS with the wesbite.
- Save 3 months of engineering work by making it possible for marketers to create, preview, and publish landing pages without any engineering help.
- Make it possible to create any website page through Sanity CMS.
- Make it possible to split-test (A/B testing) pages through Sanity and LaunchDarkly
- Come up with an architecture that makes it possible for the old website and the one to co-exist on the same domain until all website pages are migrated to the new setup.
- Help deploy Sanity CMS and the website on Zego's infrastructure.
- Provide consulting on how to improve Zego's infrastructure to optimize developer experience and time to go live.

LAK Gallery

Arts & Crafts

Senior Fullstack Developer

Berlin, Germany

June 2021 - October 2021 (4 months)

LAK Gallery is an international art gallery that displays limited edition contemporary work in furniture, ceramics, and sculpture.

We've built the eCommerce from scratch with Next.js, TypeScript, Vercel, and Sanity.

By focusing on Core Web Vitals and Lighthouse scores, we've optimized the site to be fast, accessible, and properly structured for search engines to crawl.


Entertainment & Leisure

Senior fullstack developer  - As a freelancer

Berlin, Allemagne

April 2021 - June 2021 (2 months)

Loop Create is an event for music makers to discover new ideas and inspire their creative practice.

Given the confidential nature of this project, I can't dive into specifics.


Energy & Utilities

Senior fullstack developer  - As a freelancer

Berlin, Germany

September 2020 - December 2020 (3 months)

Led the development of Illuminem, an Energy News Aggregator. The project consisted of a Sanity CMS, a Next.js frontend, and a Java articles crawler.

I did the following:
- Came up with an architecture that allowed the client to see posts crawled from 14 different sources but also add their own posts.
- Integrated Sanity CMS to make everything in the app editable.
- Used Next.js static regeneration technique to create static pages that rebuild dynamically when data changes.
- Implemented views and ranking system using Sanity.
- Created responsive carousels from scratch.
- Created a blog for the client where articles are written in the CMS.
- Used accessibility best practices to achieve a lighthouse score of 100.
- Used SEO best practices to achieve a lighthouse score of 100.
- We have the following lighthouse scores: performance (97), accessibility (100), best practices (100), SEO (100).


Digital & IT

Frontend Developer (Remote)  - As a freelancer

Berlin, Germany

April 2020 - Today (2 years2 years and 3 months)

Creating a design system to be used across all Ahrefs tools.

Zalando SE

Digital & IT

Frontend Developer

Berlin, Germany

June 2019 - April 2020 (10 months)

- Integrated Contenful CMS with Zalando API in order to serve static landing pages.
- Created several landing pages using React.
- Created features in a Node API for landing pages.


Digital & IT

Frontend Developer

Berlin, Germany

August 2018 - July 2019 (10 months)

- Built product features from requirements to discussions with the product manager and UX/UI designers.
- Contributed to improving the team code review and testing process.
- Created a NodeJS open source library: Camunda external task client.
- Contributed to an open source ElectronJS project: Camunda modeler.
- Maintained and developed open source and enterprise features for Camunda BPM Platform with AngularJS.
- Maintained and developed features for various Camunda open source projects (e.g. Camunda commons ui).


Digital & IT

Full-Stack JavaScript Developer

Dubai, United Arab Emirates

October 2016 - July 2017 (9 months)

- Maintained a NodeJS API serving as a backend for ads visited by thousands of users daily. Implemented features for these ads using LiveScript, HTML, and CSS.
- Contributed to the implementation of a NodeJS API for gaming and education products.
- Helped as well build their frontends using React and Redux both in JavaScript and LiveScript.
- Created internal tools for marketing teams using React and CSS.

Ideal Soft

Digital & IT

Software Developer (Internship)

Dubai, United Arab Emirates

August 2015 - Today (6 years6 years and 11 months)

An internship where I worked as a full-stack developer.

Federico Stella - Illuminem


Great guy to work with. He possesses outstanding design, content creation and technical skills, while also having very useful perks, like a strong project management attitude, and providing advice and insights on how to make the product better. I worked with him on a very big project, so the perks I mentioned were particularly useful and important.

Niels Van Beek - Product & Service Designer


Seif is undoubtedly an incredibly driven, knowledgeable and skilled developer, project and product leader. I would trust him with any topic or team. I worked as a UX/UI designer together with Seif on a web product for the energy sector for three months. His honest cross-functional leadership and ability to manage and connect with the client, in addition to managing the entire product development and launch process easily qualifies him to be the best guy for almost every challenge. He might not always say what’s most convenient however ultimately this will help to get the best results. Seif navigates and translates between the worlds of business, tech and user experience - and lives the wise humbleness to seek advice of others in their fields of expertise.

Info Illuminem - Illuminem


Tinloof is capable of building amazing products. Seif, Omar, and their collaborators were entitled to build from zero a complex website, from the back-end architecture, to the CMS and the front-end. The project lasted 4 months, and Tinloof has demonstrated compelling IT hard-knowledge (JavaScript, CSS, Python, etc.) to construct anything required and the ability to outclass in project management, communication and front-end skills. The project consisted of developing a hub of information, aggregating multiple sources automatically, and displaying selected posts across different sections in the platform. Given the high level of automation, together with the customization via CMS, the job involved a complex architecture and many challenges. Tinloof excelled in critically resolving any problem faced while assuring quality and effective solutions. Accordingly, within the project's scope, almost everything was possible thanks to the breadth and depth of their IT skills. Tinloof surprised in project management skills. Upon contract signature, they promised to be the partner to trust to manage different people involved (from other developers to designers). Not only they did so, but further brought efficiency to the project development by being the "light-house" of the wider IT team. Thus, never lagging-behind, they pushed the project management to the next level. As regards to communication, by using Trello, video calls, and instant messaging, they were transparent in showing their pipeline of work and demonstrated instant availability (a call away at any time!) to respond to every request. Despite the best-practises, we faced once a misalignment on a decision. To avoid this in the future, Tinloof acted proactively by proposing to send memos after the meetings to track decisions and ensure that both parties were aligned. A particular note is for their front-end skills. We echo what their website says: "Front-end experts". The platform performs at cutting-edge levels in performance (1.3 seconds to load the heaviest page), SEO (lighthouse score of 98%), accessibility and responsiveness (mobile is particularly excellent). After product validation, our users were amazed by the UI/UX design, something looking "professional, even better than dominant incumbents in the market". Thus, we maintain that Tinloof's problem solving, reliability, project management, communication and front-end skills set them apart. After 4 months of journey, they proved to be capable of building amazing products. 

Abdelillah Hassam - IT++


I worked closely with Seif during these past months crafting a product from Scratch. Seif demonstrated strong expertise in front-end development especially with JS stacks technologies (React, NextJS). He always aims to deliver scalable, performant solutions. I also want to highlight his skills in project management within a team with different roles and backgrounds which he led successfully. He has eased to grasp technical as well as functional subjects in projects.

Omar Benseddik - Tinloof


Seif is an experienced and strong software developer that led the project Illuminem (energy news aggregator) from 0 to 100. We worked closely on each feature and he managed the project with great attention to detail and a very organized workflow using tools like Trello and Notion. Seif is an expert at JavaScript, React and CSS. He also masters the framework NextJS and managed to boost the Lighthouse performance of the project to 100. He built complex features, integrated the project with Sanity CMS and supported both the backend developer and designer. Working with Seif is a pleasure. He is direct, knowledgeable, available and very effective in his approach.