Frontend Developer - React.js

ablefy

Location: Germany
Job Type: full-time
Salary: Unknown
Posted: October 9, 2025

Job Description

About us

At ablefy, we believe that passion can turn into a career for anyone! With our cloud-based SaaS platform solution, ablefy.io, we offer an easy and efficient way for everyone to create and sell digital products and online courses. More than 70,000 entrepreneurs have already placed their trust in our expertise!

Our story began in 2015, and for the first five years, we grew organically, becoming a profitable company with a team of around 60 employees. Then, in September 2021, we raised $38 million in series A funding led by Target Global, with participation from Partech Ventures and Avid Ventures. Since then, we've doubled in size!

Since then, our company size, products, features, and services have doubled and we have become Germany's No. 1 platform for coaches, consultants, speakers, and service providers. We continue to grow to this day – that's why we're looking for you.

Our core values are crucial to our success:

Ownership - Lead by Example, Accountability, Mission first
Be Curious & Drive Change - Embrace Change & Growth, Never Assume, Lead with a Vision for Change
Customer-Obsessed - Champion Customer-Centric Decision-making, Deliver Meaningful Value, Go Above and Beyond
As One Tribe - Embrace Differences, Collaboration over Hierarchy & Competition, Build Trust through Honesty, Integrity & Respect

Diversity & Inclusion

At ablefy, we embrace our differences, as they are our greatest strength. We recognize that everyone has a unique perspective based on their experiences, identities, and thought processes, and we strive to create an inclusive environment for all. Discrimination based on race, religion, color, national origin, gender identity or expression, sexual orientation, age, marital status, disability status, or any other aspect that makes you unique is not tolerated at ablefy. We aim to make growth accessible to everyone!

We know that no candidate checks every single box, and that’s okay! If you’re excited about this role and think you can bring something valuable to our team, we encourage you to apply—even if you don’t meet every requirement. We’d love to hear from you!

Description

We’re looking for a skilled Frontend Developer to join our team and help build seamless, secure, and user-friendly payment experiences. You’ll work closely with product managers and backend engineers to create intuitive interfaces that power our core payment features. If you’re passionate about performance, usability, and modern web technologies, we’d love to hear from you!

Responsibilities

Use markup languages like HTML to create user-friendly web pages.
Maintain and improve website.
Optimise applications for maximum speed.
Design mobile-based features.
Collaborate with back-end developers and web designers to improve usability.
Get feedback from, and build solutions for, users and customers.
Write functional requirement documents and guides.
Create quality mockups and prototypes.
Help back-end developers with coding and troubleshooting.
Ensure high quality graphic standards and brand consistency.
Stay up-to-date on emerging technologies.

Requirements

Min 5 years work experience as a Front-end developer.
Experience with Server-Side Rendering (SSR).
4 years of experience with React.
Hands on experience with markup languages.
Experience with JavaScript, CSS and jQuery.
Familiarity with browser testing and debugging.
In-depth understanding of the entire web development process (design, development and deployment).
Understanding of layout aesthetics.
Knowledge of SEO principles.
Familiarity with software like Adobe Suite, Photoshop and content management systems.
An ability to perform well in a fast-paced environment.
Excellent analytical and multitasking skills.
BSc degree in Computer Science or relevant field.

** This role can be based in our Berlin office in a hybrid setup for candidates located in Berlin, or offered as a fully remote role for those based within ±2 hours of Central European Time (CET).

Benefits

Paid Time Off - 30 vacation days.
A competitive salary.
A personal Training & Development budget of € 1,500 per year.
Responsibility and trust from day 1.
Individual coaching and further training to support you in your development.
A free BVG ticket.
Employee discounts at numerous companies (e.g. at the gym or in online stores).
Pension Program with company match.
A Culture of equity and Inclusion where you are appreciated for the person you are.

🎯 Who is this job for?

This role is ideal for a Senior Frontend Developer with 5+ years of experience, especially in React.js and Server-Side Rendering. Strong skills in JavaScript, CSS, HTML, debugging, and performance optimization are essential. The candidate should be comfortable collaborating with cross-functional teams and building scalable, user-friendly web interfaces in a fast-paced SaaS environment.

💬 Potential Interview Questions

What is Server-Side Rendering (SSR) in React and why is it beneficial?
SSR is the process of rendering React components on the server rather than in the browser. It improves performance, SEO, and initial load times.
How do you manage state in a large-scale React application?
For large-scale apps, I use a combination of local state (with useState, useReducer) and global state management libraries like Redux or Zustand, depending on complexity.
What are some common performance optimizations in React?
Techniques include memoization (React.memo, useMemo, useCallback), lazy loading components, code splitting, and optimizing rendering with key props.
How would you ensure cross-browser compatibility in your frontend code?
By using tools like Babel and Autoprefixer, running tests in different browsers, and avoiding non-standard APIs unless properly polyfilled.
What are the key differences between CSS-in-JS and traditional CSS?
CSS-in-JS scopes styles to components and supports dynamic styling via JavaScript, while traditional CSS uses global stylesheets and class-based rules.
How do you handle forms and validation in React?
I use controlled components with useState or form libraries like Formik or React Hook Form for scalability and validation schema integration.
How would you debug a UI issue in production?
I'd use logging tools like Sentry, browser developer tools, and network analysis to trace the issue and reproduce it locally with test data.
How do you collaborate with backend developers on APIs?
I work with OpenAPI specs or Postman collections, define clear contracts, and use tools like Axios or Fetch with async/await for API integration.
What SEO practices do you follow for a React-based web app?
I implement SSR or use Next.js, set meta tags dynamically, generate sitemaps, and ensure semantic HTML is used correctly.
Can you describe your experience with responsive and mobile-first design?
I use CSS media queries, Flexbox/Grid, and design with mobile breakpoints first to ensure seamless experiences across devices.

📋 Job Summary

Join ablefy, Germany’s leading platform for coaches and digital entrepreneurs, as a Frontend Developer (React.js) and help shape seamless, user-friendly payment experiences. You'll work with modern web tech (React, SSR, JavaScript, HTML/CSS) in a collaborative, fast-paced environment. The role is fully remote within ±2h CET or hybrid in Berlin, offering a competitive salary, €1,500 annual training budget, and 30 vacation days. With over 70,000 customers and strong Series A backing, ablefy is growing fast—now’s the time to make your impact.