Front-end Developer

Insider One

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Location: Türkiye
Job Type: full-time
Salary: Unknown
Posted: April 28, 2026

Job Description

About us

Insider One is the #1 platform that brings everything marketing and customer engagement teams need in one place so they can reach their peak potential and become unstoppable.

Our story began with six desks and a vision to create a single platform to make industry-first technologies and emerging channels accessible to marketers worldwide. Today, Insider One is powered by 1,500+ team members representing 50+ nationalities across 30+ offices. With AI at its core and an integrated Customer Data Platform (CDP), Insider One unites data, personalization, and journey orchestration across the most extensive set of natively supported channels, including WhatsApp, SMS, Email, Web, App, and Site Search.

We recently raised one of the largest funding rounds in the industry, a $500M Series E led by General Atlantic. We are backed by top-notch investors, including Sequoia Capital, QIA, Riverwood, and Endeavor Catalyst, and trusted by 2000+ customers from high-growth startups to the most prestigious Fortune 500 companies such as Samsung, Nike, L’Oreal, Singapore Airlines, Nestlé, Nissan, Lenovo, Puma, IKEA, Allianz, Domino's, and the list goes on.

Insider One was congratulated for becoming one of the only woman-founded, women-led B2B SaaS unicorns in the world. Loved by customers, recognized by analysts, we are the only vendor recognized as the #1 leader in all the capabilities marketing and customer engagement teams need.

From day one, Insider One’s mission has not only been to build a world-class product company, but also to create one of the most socially progressive technology communities in the world. Through our social responsibility initiatives like 100 Social Responsibility Projects, AI Training for Teachers, Code Academy, SheCodes, SheLeads, and SheMarkables, our community has committed to scaling its impact on our communities across 30+ countries, driving initiatives in health, education, farming, animal rights, and increasing women’s representation in STEM.

Behind all these achievements is an exceptionally talented, visionary team of overachievers that moves fast and agile, creating cutting-edge products, and focuses on making an impact. If you want to be a part of this journey, just keep reading.

And now? Now we are looking for a Front-end Developer, who will help our Web Development Team create and implement a wide variety of web-based products using Go, Node JS, or PHP, and wants to take their career one step further. If you think you are one of those people, here you will have the chance to work with the world's leading brands with Artificial Intelligence & Machine Learning technologies. Right now, while you are reading this, we are sending an average of 2.2 billion requests and almost 2 billion instant notifications to more than 450 servers a day. On the Artificial Intelligence and Predictive side, we have more than 100 TB of historical data. We do not wait for jobs or opportunities to come to our feet, we create them. We have now reached 25% of global users. If all these interests you, read on for more!

Our Engineers and Software Developers always think with an innovative perspective, taking advantage of the inexhaustible power of the digital world. They create impressive and intelligent products like a true artist. Our Product and Development teams are located in our Istanbul office, so we produce and develop the technology we export to the world in our own country. As Insider One, we believe in cooperation and adapting the innovations brought by technology by acting fast. We work closely with other Departments with agile teams, and we are not afraid of getting our hands dirty.

What You Will Do

Participate in the entire project life cycle, from product development and release to maintenance,
Research, evaluate, and share existing and upcoming new technologies with the team,
Provide communication with Product Managers, Designers, Teammates, and co-working teams to write efficient code,
Produce new ideas to develop new features/setups or to improve existing applications and processes, develop POC applications when necessary to show ideas,
Work closely with Back-End Developers to communicate with APIs,
Provide control of error channels to keep product quality at the highest level,
Write code in a reusable, manageable, scalable way,
Responsible for the maintenance and performance of new features in the Front-end,
Aim to maintain the highest standards of code quality and information sharing through daily code reviews.

What You Will Need

Have 4+ years of experience as a Front-end Developer, working with modern tools, libraries (e.g., NPM, Vite, Webpack, Babel), and micro front-end architectures.
Experience working in an Agile team,
Experience with HTML5, CSS3, Javascript, Vue.js,
A deep understanding of Vue.js, including experience with both the Composition API and Options API
Experience with Sass or other compiled CSS languages, and experience in responsive web design,
Stay up-to-date on emerging technologies,
Good knowledge of version control systems (e.g., Git),
Experience in optimizing page performance,
In tune with maintaining, scaling, and monitoring the systems,
Familiarity with the application performance and error tracking apps (e.g., Sentry, Datadog, Site 24x7, etc.),
Ability to write clean and semantical Front-end code
Experience in Unit, Visual, and e2e Testing,
Self-motivated, independent, organized, proactive, and highly responsive when working across multiple teams.
Open to developing and learning new technologies,
Have a visionary mindset,
Knowledge and experience in TypeScript and React.js are a bonus.

What We Offer

Enjoy a monthly meal allowance designed to enhance your daily routine.
Access comprehensive private health insurance.
Feed your curiosity with access to Spotify, LinkedIn Learning, Blinkist, MasterClass, Neoskola, and CloudGuru.
Level up with internal trainings covering AI fundamentals, coding, foreign languages, and a wide range of personal development skills.
Be part of a diverse team that’s as global as it gets, where every voice is heard and 50+ nationalities build together.
Become a Shareowner through our eligibility-based “ESOP” and own a piece of what you build.
Help build the team you want to work with and enjoy rewarding referral bonuses.
Opportunities to give back to your community through volunteering and purpose-driven social impact projects.
From global retreats to team-building activities, expect year-round events that turn into lifelong memories.
Get inspired by the greatest minds in the tech industry through events like our Tech & Dev Talks.
Work from anywhere in Turkey through our fully remote setup.

We aren't just hiring for a position; we are hiring for a mission — a mission to build a lasting legacy that will set the benchmark for the most progressive tech companies out there.

To do this, we are looking for exceptional talent to join a community of good-hearted individuals who take high ownership and are relentlessly driven to go the extra mile.

If this sounds like who you are and where you aspire to be, we are excited to meet you.

We provide equal opportunity in a zero-discrimination workplace and not just welcome but also embrace everyone without regard to sex, race, color, nationality, religion, gender identity, sexual orientation, disability status, citizenship, or marital status.

🎯 Who is this job for?

This role suits a Middle Frontend Developer with strong experience in Vue.js, JavaScript, HTML5, CSS3, and modern frontend tooling. The candidate should be comfortable building scalable web applications, collaborating with backend teams via APIs, optimizing performance, and writing clean, testable code. They should also have experience in Agile environments, participate in full product lifecycle, and contribute ideas to improve features and processes.

💬 Potential Interview Questions

How would you design a scalable front-end architecture for high-traffic applications?
Use modular and micro front-end architecture, ensure component reusability, and optimize asset delivery via CDNs. Focus on maintainability and independent deployments.
What are the differences between Vue Composition API and Options API?
The Composition API provides better logic reuse and organization in large components, while the Options API is simpler and more intuitive for smaller components.
How do you optimize page performance in modern web applications?
Use lazy loading, code splitting, efficient asset delivery, and minimize reflows/repaints. Monitor performance with tools and optimize based on metrics.
What is micro front-end architecture and when would you use it?
It splits a frontend into independently deployable parts owned by different teams. It’s useful in large-scale systems with multiple teams and domains.
How do you ensure code quality in a collaborative Agile environment?
Use code reviews, enforce linting rules, write automated tests, and follow shared standards. Continuous integration helps maintain quality.
How do you handle communication between frontend and backend systems?
Use well-defined APIs (REST/GraphQL), handle errors properly, and ensure consistent data contracts. Collaborate closely with backend teams.
What tools can be used for monitoring and error tracking in frontend applications?
Tools like Sentry or Datadog help track errors and performance issues in real time. They improve debugging and system reliability.
How do you write maintainable and reusable frontend code?
Break UI into small reusable components, follow DRY principles, and keep logic separated from presentation. Use consistent naming and structure.
What types of testing are important for frontend applications?
Unit tests for logic, integration tests for components, and end-to-end tests for user flows. Visual regression testing helps catch UI issues.
How do you stay updated with new frontend technologies and trends?
Follow industry blogs, documentation, and participate in tech communities. Continuously experiment and share knowledge with the team.

📋 Job Summary

Insider One is a global, AI-driven marketing and customer engagement platform trusted by 2000+ brands, helping companies deliver personalized experiences at massive scale . As a Front-end Developer (Mobile Products), you’ll build and optimize high-performance web products using JavaScript, Vue.js, and modern frontend tools, collaborating across teams to deliver scalable, user-focused solutions. This is a fully remote role within Turkey, offering strong benefits, learning resources, and ESOP participation. Join a fast-growing unicorn where you’ll work with cutting-edge AI technologies, impact millions of users, and grow within a highly ambitious, global team.