backend developer

frontend developer

java developer

fullstack developer

senior frontend developer Jobs in Istanbul

senior frontend developer

javascript developer

HaloScape

<div>
 
 
 About HaloScape
 
 
 
 
 Powered by AI. Built for life.
 
 
 
 
 
 
 HaloScape is a next-generation digital health companion designed to simplify and empower personal wellness. It combines sleep, stress, blood test insights, daily habits, and wearable data into one smart, personalized app helping users see the full picture of their health, take action, and build healthier lives.
 
 
 
 
 
 As part of the HaloScape team, you'll work on the design of a product that isn't just another wellness tracker it's
 
 a health super app
 
 redefining how individuals understand and manage their well-being.
 
 
 
 
 
 
 Role
 
 
 
 
 
 
 As a
 
 Web Developer at HaloScape
 
 , you will be responsible for developing and maintaining
 
 HaloScape&rsquo;s websites and panel ecosystem
 
 . You will ensure high-quality, secure, and scalable web applications that deliver excellent user experiences. You&rsquo;ll work closely with designers, backend developers, and product managers to implement new features and optimize performance.
 
 
 
 
 
 
 What You&rsquo;ll Do
 
 
 
 
 
 <ul>
 <li>
 Develop, maintain, and optimize HaloScape&rsquo;s websites and panel ecosystem
 </li>
 <li>
 Implement responsive, user-friendly interfaces with modern frontend frameworks
 </li>
 <li>
 Integrate web applications with backend APIs, authentication systems, and third-party services
 </li>
 <li>
 Collaborate with designers to deliver visually polished and intuitive interfaces
 </li>
 <li>
 Write clean, modular, and testable code following best practices
 </li>
 <li>
 Ensure cross-browser compatibility, accessibility, and performance optimization
 </li>
 <li>
 Support deployment, monitoring, and continuous improvements of web applications
 </li>
 <li>
 Stay up to date with the latest web technologies and best practices
 </li>
 </ul>
 
 
 
 
 
 What You&rsquo;ll Bring
 
 
 
 
 
 <ul>
 <li>
 Bachelor&rsquo;s degree in Computer Engineering, Software Engineering, or a related field
 </li>
 <li>
 Strong proficiency with JavaScript/TypeScript and experience in React.js, Next.js etc.
 </li>
 <li>
 Solid understanding of HTML5, CSS3, and responsive design principles
 </li>
 <li>
 Experience integrating RESTful APIs and third-party SDKs
 </li>
 <li>
 Familiarity with state management libraries
 </li>
 <li>
 Knowledge of authentication systems
 </li>
 <li>
 Experience with testing frameworks is a plus
 </li>
 <li>
 Familiarity with CI/CD pipelines, Git, and version control workflows
 </li>
 <li>
 Experience with cloud platforms is a strong plus
 </li>
 <li>
 Strong problem-solving skills, attention to detail, and ability to work in cross-functional teams
 </li>
 <li>
 Proficiency in English; additional languages are a plus
 </li>
 </ul>
 
 
 
 
 
 Ready to Shape the Future of Health?
 
 
 
 
 
 
 If you&rsquo;re a
 
 Web Developer
 
 who wants to go beyond building apps and instead help create an intelligent health companion that improves lives we&rsquo;d love to meet you.
 
 
 
 
 
 Learn more about HaloScape: haloscape.health
 
</div>

Web Developer

Crs Soft

<div>
 
 
 Who we are?
 
 
 
 
 
 
 It&rsquo;s time to turn on bright mode. Let&rsquo;s meet!
 
 
 We are a software company that produces niche technologies with an innovative, dynamic, and added-value understanding to the leading companies in its field, serving in different sectors in Turkey and abroad. For starters, the first thing you should know is that Crs is an umbrella organization. Our e-transformation brand, e-d&uuml;nya, offers digital solutions on a single platform. Our game brand Corvus Jay provides players of all ages and backgrounds with captivating, humorous, and artistic games that transcend the ordinary and deliver unforgettable experiences with its open-minded, humorous, creative, and vibrant world of pop art. We are excited to expand our investment areas and the sectors we are involved in. Our focus is on innovative research, exploring Big Data Processing, AI, machine learning, and game development. As one of the top 500 IT companies in Turkey, we are one of the fastest-growing technology companies selected by Deloitte Turkey for the 6th time in a row. Our route is always the same, the future!
 
 
 
 
 
 
 Job Description
 
 
 
 
 
 
 As a Software Developer, you will participate in agile software development process, drive development of large-scale, distributed web-based applications, and develop innovative web applications in a .NET environment. You should bring and share sufficient process experience in Agile/Scrum methodology, emphasizing collaboration and teamwork in application to large enterprise software development projects.
 
 
 
 
 
 
 Experience &amp; Skills
 
 
 
 
 
 
 The ideal candidate will have:
 
 
 
 
 <ul>
 <li>
 BS or MS degree in computer engineering, computer science or equivalent experience
 </li>
 <li>
 0-2 years experience in software projects
 </li>
 <li>
 Programming experience in one of the followings; C#, Java, Javascript
 </li>
 <li>
 Web programing experience in ASP.NET, ASP .NET MVC
 </li>
 <li>
 Experience in working with SQL and the use of database design techniques
 </li>
 <li>
 Basic understanding of web markup, including HTML5 and CSS3
 </li>
 <li>
 Knowledge about Data Structures and Algorithms (i.e. selecting and implementing an algorithm, using data structures to solve a problem.)
 </li>
 <li>
 Experience with open source platforms, including contributions on open source platforms is a plus
 </li>
 <li>
 Innovative point of view and passioned in learning new things and developing him/her self
 </li>
 <li>
 Good analytical skills, and being eager to develop and take on responsibility
 </li>
 <li>
 Fluency in English.
 </li>
 </ul>
 
 
 
 
 
 
 
 
 Perks &amp; Benefit
 
 
 
 
 
 <ul>
 <li>
 Buffet breakfast in the office every morning
 </li>
 <li>
 Comprehensive private health insurance package
 </li>
 <li>
 Meal card &amp; commute compensation,
 </li>
 <li>
 Lots of events and celebrations (check out @crssoft on Instagram)
 </li>
 <li>
 Education fund to support learning and development opportunities
 </li>
 <li>
 Paid birthday off to spend time with your loved ones
 </li>
 <li>
 A gift book on your birthday
 </li>
 <li>
 All the technical equipment and licenses you need
 </li>
 <li>
 Marriage leave (5 days)
 </li>
 <li>
 No dress code!
 </li>
 </ul>
 
 
 
 
 
 Join Us
 
 
 
 
 
 
 Work hard play hard. 😊 At Crs Soft, we benefit from the power of technology and science, and we achieve the best with our creative and innovative team. Lifelong learning, open-mindedness and leadership are part of our culture. We celebrate all our achievements and special moments together, and we know how to have fun.
 
 
 
</div>

Software Engineer

SETCARD

<div>
 
 
 &ldquo;Setcard&rsquo;da Gelecek Seninle &Scedil;ekillenecek!&rdquo;
 
 
 
 
 
 
 25 y&inodot;ll&inodot;k deneyimimiz, g&uuml;&ccedil;l&uuml; finansal altyap&inodot;m&inodot;z ve teknolojiye olan yat&inodot;r&inodot;mlar&inodot;m&inodot;zla gelece&gbreve;i birlikte tasarl&inodot;yoruz.
 
 
 
 
 
 Setcard olarak; yemek kart&inodot;, esnek yan haklar (Flexlife), filo y&ouml;netimi, yak&inodot;t ve konaklama &ccedil;&ouml;z&uuml;mleri ile 60.000&rsquo;den fazla &uuml;ye i&scedil;yerine, binlerce kurumsal m&uuml;&scedil;teriye ve y&uuml;zbinlerce kullan&inodot;c&inodot;ya hizmet sunuyoruz.
 
 
 
 
 
 Kurumlara tasarruf ve verimlilik, &ccedil;al&inodot;&scedil;anlara ise esneklik ve kolayl&inodot;k sa&gbreve;layan bu dijital ekosistemin par&ccedil;as&inodot; olmak ister misiniz?
 
 
 
 
 
 Bilgi Teknolojileri Departman&inodot;m&inodot;z&inodot;n Yaz&inodot;l&inodot;m Geli&scedil;tirme ekibimizde g&ouml;rev alacak &ldquo;
 
 Senior FrontEnd
 
 
 Developer&rdquo;
 
 pozisyonu i&ccedil;in yeni ekip arkada&scedil;lar&inodot;m&inodot;z&inodot; ar&inodot;yoruz.
 
 
 
 
 
 
 
 
 
 Ki&scedil;isel Nitelikler
 
 
 
 
 
 <ul>
 <li>
 Bilgisayar M&uuml;hendisli&gbreve;i, Yaz&inodot;l&inodot;m M&uuml;hendisli&gbreve;i veya ilgili alanlarda Lisans/Y&uuml;ksek Lisans mezunu olmak.
 </li>
 <li>
 React.js ile en az
 
 4&ndash;5 y&inodot;l
 
 aktif geli&scedil;tirme deneyimine sahip olmak.
 </li>
 <li>
 Kurumsal projelerde mimari sorumluluk alm&inodot;&scedil; veya teknik liderlik yapm&inodot;&scedil; olmak.
 </li>
 <li>
 Modern JavaScript (ES6+) ve TypeScript konusunda uzman olmak.
 </li>
 <li>
 React mimarileri (component-based yap&inodot;, lazy loading, code splitting, SSR/CSR/hydration) konusunda deneyim sahibi olmak.
 </li>
 <li>
 Redux Toolkit, Zustand, React Query gibi state management ara&ccedil;lar&inodot;nda ileri d&uuml;zey bilgiye sahip olmalk.
 </li>
 <li>
 Next.js, Vite, Webpack gibi modern framework ve build ara&ccedil;lar&inodot;na h&acirc;kim olmak.
 </li>
 <li>
 Jest, React Testing Library gibi ara&ccedil;larla unit ve component testi yazabilmek.
 </li>
 <li>
 Storybook, TailwindCSS, Styled Components gibi UI sistemleriyle &ccedil;al&inodot;&scedil;m&inodot;&scedil; olmak.
 </li>
 <li>
 REST API&rsquo;leriyle &ccedil;al&inodot;&scedil;m&inodot;&scedil;, tercihen GraphQL deneyimine sahip olmak.
 </li>
 <li>
 CI/CD s&uuml;re&ccedil;lerine a&scedil;ina, Git ve Git Flow konusunda yetkin olmak.
 </li>
 <li>
 Web performans&inodot;, eri&scedil;ilebilirlik (a11y) ve SEO konular&inodot;nda bilgi sahibi olmak.
 </li>
 <li>
 Kod inceleme s&uuml;re&ccedil;lerini y&ouml;neten, teknik standartlar&inodot; olu&scedil;turma konusunda tecr&uuml;beli olmak.
 </li>
 <li>
 Tak&inodot;m y&ouml;netimi, planlama, teknik d&ouml;k&uuml;mantasyon ve ileti&scedil;im konular&inodot;nda g&uuml;&ccedil;l&uuml; olmak.
 </li>
 <li>
 Teknik dok&uuml;mantasyonu takip edebilecek d&uuml;zeyde &Idot;ngilizce bilgisine sahip olmak.
 </li>
 </ul>
 
 
 
 
 
 
 
 
 G&ouml;rev Tan&inodot;m&inodot;
 
 
 
 
 
 <ul>
 <li>
 React ile kurumsal d&uuml;zeyde modern web uygulamalar&inodot; geli&scedil;tirmek,
 </li>
 <li>
 Frontend mimarisini kurmak, optimize etmek ve teknik karar s&uuml;re&ccedil;lerinde liderlik etmek,
 </li>
 <li>
 Performans ve kullan&inodot;c&inodot; deneyimini (UX) iyile&scedil;tiren &ccedil;&ouml;z&uuml;mler &uuml;retmek,
 </li>
 <li>
 UI/UX ekipleriyle yak&inodot;n &ccedil;al&inodot;&scedil;arak component-based yap&inodot;lar geli&scedil;tirmek,
 </li>
 <li>
 Kod kalitesi, test kapsam&inodot; ve code review s&uuml;re&ccedil;lerine &ouml;nc&uuml;l&uuml;k etmek,
 </li>
 <li>
 Junior ve Mid-Level frontend geli&scedil;tiricilere teknik mentorluk sa&gbreve;lamak,
 </li>
 <li>
 G&uuml;ncel frontend teknolojilerini ve trendlerini takip ederek tak&inodot;ma entegre etmek,
 </li>
 <li>
 Backend ekipleriyle entegrasyon ve API s&ouml;zle&scedil;melerini y&ouml;netmek.
 </li>
 </ul>
 
 
</div>

Senior Frontend Developer

Seven Apps

<div>About the role:
As a React Developer, you will be instrumental in designing and developing responsive web applications. You will work closely with our design, development, and product teams to implement new features, ensure optimal performance, and deliver an outstanding user experience. 
 
**This is a full on-site position in Levent.**
Responsibilities: 
<ul>
<li>Develop robust web applications using React.js, ensuring high performance and responsiveness.</li>
<li>Collaborate with UI/UX designers to translate designs into functional web interfaces.</li>
<li>Integrate with RESTful APIs to manage data flow between the backend and frontend.</li>
<li>Conduct code reviews and help improve overall code quality and development processes.</li>
</ul>Requirements<ul>
<li>Proven experience as a React Developer with a strong portfolio of web applications.</li>
<li>Experience with Typescript, TailwindCSS, Tanstack Query is required.</li>
<li>Experience with NextJS, specifically App Directory and Server Actions paradigms.</li>
<li>Experience with state management libraries such as Zustand.</li>
<li>Knowledge of RESTful APIs and modern front-end build pipelines and tools.</li>
<li>Familiarity with version control systems such as Git.</li>
<li>Excellent problem-solving skills and attention to detail.</li>
<li>Ability to work collaboratively in a team environment.</li>
</ul>Benefits
<ul><li>Private Health Insurance: Stay covered with our comprehensive health plan.</li>
<li>Meal &amp; Transportation Allowance: Fuel your commute and appetite, stress-free!</li>
<li>Snacks &amp; Cozy Office Vibes: Work in a chill space stocked with treats you&rsquo;ll love.</li>
<li>Learning Stipend: Invest in yourself&mdash;we&rsquo;ll cover part of your growth journey!</li>
<li>Marriage Support: Celebrate your big day with our special financial contribution to mark the occasion.</li></ul></div>

React Developer - Web (Onsite)

Codeway

<div>
 
 About Codeway
 
 
 Codeway is a global consumer tech company with more than 400M users worldwide.
 
 
 Since 2020, we&rsquo;ve built and scaled 60+ mobile apps across creativity, productivity, wellness, language learning, and entertainment.
 
 
 Our flagship apps &mdash; Retake AI, Cleanup, Learna, and DramaPops &mdash; and many of them lead their categories globally. In 2024, we became the most downloaded app publisher on iOS, driven by cutting-edge AI research, sharp data-driven execution, and a relentless focus on product and marketing.
 
 
 We&rsquo;re a team of 300+ people across &Idot;stanbul and Barcelona who bring curiosity, passion, trust, and ownership to everything we build. Recognized as a #1 LinkedIn Top Startup and a Great Place to Work in Europe, Codeway is where ambitious people do their life&rsquo;s best work.
 
 
 We&rsquo;re building the next generation of consumer tech and reimagining what mobile apps can be.
 
 
 This is Codeway. This is our way. Join us.
 
 
 
 POSITION
 
 
 
 We are looking for Full-stack Developers to join our team. As a Full-stack Developer, you will work on web projects, on both back-end and front-end.
 
 
 
 WHAT YOU&rsquo;LL BE DOING?
 
 
 
 
 <ul>
 <li>
 Analyze, implement, and deliver new features while monitoring and maintaining to offer high-quality software solutions.
 </li>
 <li>
 Take full accountability for your work, from start to finish, by identifying any issues and improving our products.
 </li>
 <li>
 Maintain a sense of curiosity regarding emerging technologies and trends in the industry, continuously improving your technical skills and knowledge.
 </li>
 <li>
 Engage in code reviews to guarantee code quality, performance, and compliance with coding standards.
 </li>
 <li>
 Recognize challenges that affect the entire company and strive to elevate the quality standards organization-wide.
 
 
 
 
 </li>
 </ul>
 
 WHAT YOU&rsquo;LL BRING?
 
 
 
 
 <ul>
 <li>
 B.Sc. in Computer Science or a similar discipline.
 </li>
 <li>
 Experience with NodeJS.
 </li>
 <li>
 Experience with JavaScript, HTML, CSS, as well as frameworks like Vue or React.
 </li>
 <li>
 Experience with designing and implementing RESTful APIs.
 </li>
 <li>
 Experience with version control system(e.g., Git).
 </li>
 <li>
 Knowledge of unit/integration testing.
 </li>
 <li>
 Good communication and collaboration skills in English, with the ability to work effectively in a team environment.
 
 
 
 
 </li>
 </ul>
 
 GOOD TO HAVE:
 
 
 
 
 <ul>
 <li>
 Experience in relevant Google Cloud Products (e.g., Pub/Sub, Functions, App Engine).
 </li>
 <li>
 Experience with Vue3 and Firestore.
 </li>
 <li>
 Experience with caching strategies(e.g., Redis, Memcached).
 
 
 
 
 </li>
 </ul>
 
 WHAT&rsquo;S IN IT FOR YOU?
 
 
 
 
 <ul>
 <li>
 Great Place to Work. As our top team member, you'll be a part of a fast-growing startup and have the privilege to enjoy our accredited &ldquo;BEST WORKPLACES&rdquo; environment, ranked first among all workplaces.
 </li>
 <li>
 A Competitive Compensation Package. Long story short, we take care of you.
 </li>
 <li>
 A Meal Compensation that is actually enough for a decent &amp; nutritious lunch, we&rsquo;re not following the industry standard.
 </li>
 <li>
 Full Health Benefits. To keep you away from all the trouble, we provide unlimited private health insurance and cover the HPV vaccine.
 </li>
 <li>
 Pet Adoption Support. We cover the primary healthcare expenses, parasite vaccinations, and microchip costs that may arise within the first year after employees adopt a pet.
 </li>
 <li>
 Cool Tech Stack. Macbook, iPhone 15 Pro, magic mouse, magic keyboard; an adjustable desk with a 4K screen and any other gadget you may need in your job.
 </li>
 <li>
 Sport Activities Support. We care about your physical wellbeing and support your gym membership.
 </li>
 <li>
 Learning Never Ends! Training budget to help you grow in your role, gain new skills, and learn new things!
 </li>
 <li>
 Udemy Free Pass. An unlimited Udemy subscription.
 </li>
 <li>
 Flexible Schedule &amp; Unlimited Vacations. This isn&rsquo;t a &ldquo;clock in, clock out&rdquo; company. We care about your productivity, not tracking every minute you&rsquo;re on site. It&rsquo;s up to you to always be responsible with your work, no matter where you are or what schedule you&rsquo;re keeping.
 </li>
 <li>
 English Course Support. Be more global and perform best at your work.
 </li>
 <li>
 Comprehensive Well-being Support. Through our partnership with Meditopia, we now offer free psychological counseling, along with additional services like dietitian, personal trainer, parenting consultant, physiotherapist, child &amp; adolescent therapist, and face-to-face counseling for employees in Istanbul.
 </li>
 <li>
 A Top-Notch Office. Located at the heart of Istanbul, right next to Levent Metro Station at Ferko Signature.
 </li>
 <li>
 Codebrew. Yes, you&rsquo;ve heard it right: We love coffee so much that we&rsquo;ve built our own coffee shop inside our office, where we also provide healthy snacks at certain hours.
 </li>
 <li>
 Free Breakfast. At Codebrew - every morning at 9:30 AM.
 </li>
 <li>
 No Dress Code. Dress as you like.
 </li>
 <li>
 Happy Hours Every Friday. Every. Single. Friday. When it&rsquo;s 5 PM: Screens off, party on! (Check out Codeway on Instagram)
 </li>
 <li>
 Dream Team. Average Codeway member is young, talented, and passionate - which makes our working environment extremely dynamic. Need proof? Take a look at our Instagram.
 </li>
 <li>
 Gaming Area. Whenever you need to take a break from hard work and relax with your favorite games, our PS5 corner will be waiting for you.
 </li>
 <li>
 Software Support. Subscription to any software you might need to perform at your best.
 </li>
 <li>
 Public Transportation Support. Daily public transportation support is on us, covered by an additional monthly compensation.
 </li>
 <li>
 Parent Support. Becoming a parent is a big moment, and Codeway celebrates it with you. We offer a one-time grant to support our new parents.
 </li>
 <li>
 Massage Room. When you need a moment to recharge and unwind, our massage chair room will be ready to offer you a relaxing break.
 
 
 
 
 </li>
 </ul>
 
 THE RECRUITING PROCESS
 
 
 
 We are committed to keeping our recruitment process short and transparent. Here&rsquo;s how it looks like:
 
 
 
 <ul>
 <li>
 Application: Send us your CV or LinkedIn profile. You can also just write a few words about yourself.
 </li>
 <li>
 Case Study: We might send you a task to solve.
 </li>
 <li>
 Talent &amp; Culture Interview: Let&rsquo;s talk about your experience &amp; expectations and see what we can achieve together.
 </li>
 <li>
 Technical Interview: You will meet with future team lead to go over the case and your technical capabilities in detail.
 </li>
 <li>
 Reference Check: We will contact your references to gain insights into your past experiences and work ethic.
 </li>
 <li>
 Welcome Aboard! You are now a part of the team.
 
 
 
 
 </li>
 </ul>
 
 Your personal data that will be collected through your applications made due to this advertisement will be processed automatically by the data controller Codeway in accordance with the Personal Data Protection Law No. 6698 ("KVKK") and relevant legislation for the purpose of conducting job application processes. You can access detailed information on this matter from the
 
 
 
 "Candidate Information Notice"
 
 
 
 page at
 
 
 https://www.codeway.co
 
 
 . Codeway processes the personal data of job applicants in accordance with relevant legislation. "
 
 
 
 Privacy Notice for Employee Candidate
 
 
 "
 
 summarizes the data processing procedures during the application process.
 
 
 
 
 Bu ilan sebebiyle yapaca&gbreve;&inodot;n&inodot;z ba&scedil;vurular arac&inodot;l&inodot;&gbreve;&inodot;yla toplanacak ki&scedil;isel verileriniz veri sorumlusu Codeway taraf&inodot;ndan 6698 say&inodot;l&inodot; Ki&scedil;isel Verilerin Korunmas&inodot; Kanunu (&ldquo;KVKK&rdquo;) ve ilgili mevzuat kapsam&inodot;nda i&scedil; ba&scedil;vuru s&uuml;re&ccedil;lerinin y&uuml;r&uuml;t&uuml;lmesi amac&inodot;yla otomatik yollarla i&scedil;lenecektir. Detayl&inodot; bilgiye
 
 
 https://www.codeway.co
 
 
 adresindeki
 
 
 
 "Aday Ayd&inodot;nlatma Metnimizin"
 
 
 
 sayfas&inodot;ndan ula&scedil;abilirsiniz. Codeway, i&scedil; ba&scedil;vurusu yapan adaylar&inodot;n ki&scedil;isel verilerini, ilgili mevzuat &ccedil;er&ccedil;evesinde i&scedil;lemektedir.
 
 
 
 "&Ccedil;al&inodot;&scedil;an Aday&inodot; &Idot;&ccedil;in Gizlilik Bildirimi"
 
 
 
 ba&scedil;vuru s&uuml;recindeki veri i&scedil;leme s&uuml;re&ccedil;lerini &ouml;zetler.
 
 
 
 We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
</div>

Fullstack Developer

Lokalde

<div>
 
 We&rsquo;re growing fast and forming our core team.
 
 
 At Lokalde, we move fast, break limits, and build what others are still imagining.
 
 
 
 
 
 What you&rsquo;ll do
 
 
 
 
 <ul>
 <li>
 Design, build, and ship production-grade experiences across: React Native (iOS &amp; Android) and Modern Web (React / Next.js)
 </li>
 <li>
 Turn high-fidelity Figma designs into scalable, maintainable, and reusable UI systems
 </li>
 <li>
 Own pixel-perfect execution, performance, accessibility, and interaction quality
 </li>
 <li>
 Make frontend architecture decisions and set quality standards
 </li>
 <li>
 Collaborate closely with product, design, and backend teams to ship fast without cutting corners
 </li>
 </ul>
 
 
 
 
 What we expect
 
 
 
 
 <ul>
 <li>
 5+ years of professional experience with React Native in real-world products
 </li>
 <li>
 A portfolio or live products you can clearly walk us through (apps, web products, git or shipped store links)
 </li>
 <li>
 Deep expertise in React, TypeScript, JavaScript, and modern frontend tooling
 </li>
 <li>
 High standards for code quality, UX detail, and product polish
 </li>
 <li>
 A builder mindset: initiative, curiosity, and a strong sense of responsibility for the product
 </li>
 </ul>
 
 
 
 
 You&rsquo;ll stand out if
 
 
 
 
 <ul>
 <li>
 You care deeply about motion, micro-interactions, and visual detail
 </li>
 <li>
 You&rsquo;ve worked on AI-powered features, data-heavy interfaces, or mobile-first products
 </li>
 <li>
 You have production experience with Next.js (SSR / SSG)
 </li>
 <li>
 You have shipped multiple apps on App Store / Google Play
 </li>
 </ul>
 
 
 
 
 What you get
 
 
 
 
 <ul>
 <li>
 Flexible hours &mdash; results matter more than meetings
 </li>
 <li>
 Access to premium tools, AI credits, and digital memberships
 </li>
 <li>
 Direct impact on a fast-growing product
 </li>
 </ul>
 
 
 
 
 If you&rsquo;re passionate about mobile, AI, and building products that scale &mdash; we should talk.
 
 
 We love shipping real things that make a difference and we&rsquo;re building with people who do too.
 
 
 
 
 
 Think you can keep up?
 
 
 Drop us a line:&nbsp;jobs@lokalde.com
 
 
 
 
 
 We review every application carefully and reply to everyone who reaches out.
 
 
 Thanks for your interest, we truly appreciate the effort you put into applying.
 
</div>

Senior Lead Frontend Developer (Web & Mobile)

BiBuyTech

<div>
 
 BiBuyTech A.&Scedil;. olarak kendi b&uuml;nyemizde geli&scedil;tirdi&gbreve;imiz, AI Agent Otonom tabanl&inodot;,&nbsp;Stratejik Sat&inodot;n Alma ve BI &Idot;&scedil; Zek&acirc;s&inodot;&rdquo; Cloud &uuml;r&uuml;n&uuml;m&uuml;z&uuml;n geli&scedil;tirilmesinde, belirli s&uuml;reli, kontratl&inodot; uzaktan &ccedil;al&inodot;&scedil;acak freelance Senior Frontend Developer aray&inodot;&scedil;&inodot;m&inodot;z vard&inodot;r.
 
 
 
 
 
 
 (&Ouml;zet Profil)
 
 
 
 
 &bull; B2B SaaS&rsquo;ta veri-yo&gbreve;un ve ger&ccedil;ek-zamanl&inodot; aray&uuml;z tecr&uuml;besi; Next.js App Router (SSR/ISR), React + TS&rsquo;te uzman. TanStack Query, RHF + Zod, WebSocket/SSE, ECharts/benzeri, Playwright ve A11y/i18n pratiklerini &ldquo;&uuml;r&uuml;nle&scedil;ebilir FE mimarisi&rdquo; i&ccedil;inde uygular. Design tokens ve perf budget ile &ccedil;al&inodot;&scedil;&inodot;r.
 
 
 
 
 
 
 
 &Uuml;r&uuml;n zihniyeti y&uuml;ksek; trade-off konu&scedil;ur, &ldquo;okunabilir mimari + net data-flow&rdquo; kurar.
 
 
 
 
 
 
 
 Zorunlu Yetkinlikler (Must-Have)
 
 
 
 
 &bull; React + TypeScript + Next.js (App Router, SSR/ISR), Suspense/streaming ve cache invalidation stratejileri.
 
 
 
 
 
 
 
 &bull; State/Data: TanStack/RTK Query, global state (Zustand/Redux), optimistic update.
 
 
 
 
 &bull; Ger&ccedil;ek-zamanl&inodot;: WebSocket/SSE; reconnection + last-known-good-state; stale-less UI.
 
 
 
 
 &bull; Form &amp; &Scedil;ema: React Hook Form + Zod (kompleks RFQ/CLM formlar&inodot;).
 
 
 
 
 &bull; Grafikler: ECharts/Highcharts/D3 ile b&uuml;y&uuml;k veri &uuml;zerinde interaktif paneller.
 
 
 
 
 &bull; Test: Jest/RTL + Playwright e2e (kritik ak&inodot;&scedil;lar); Lighthouse/Web Vitals oda&gbreve;&inodot;.
 
 
 
 
 &bull; A11y &amp; i18n: WCAG 2.1 AA, RTL/LTR; tr-en. ￼
 
 
 
 
 &bull; G&uuml;venlik &amp; Yetkilendirme: OAuth2/OIDC, RBAC, XSS/CSRF bilin&ccedil;li UI.
 
 
 
 
 
 
 
 Art&inodot;lar: Micro-frontend (Module Federation), Storybook + tasar&inodot;m sistemi, Tailwind/MUI, NextAuth/OAuth, BI domain bilgisi.
 
 
 
 
 
 
 
 Ana Sorumluluklar
 
 
 
 
 &bull; RFQ kar&scedil;&inodot;la&scedil;t&inodot;rma, E-&Idot;hale canl&inodot; ak&inodot;&scedil; (latency hedefleriyle), BI dashboard (SSE/WebSocket).
 
 
 
 
 &bull; Design system ve token mimarisi; RBAC g&ouml;r&uuml;n&uuml;rl&uuml;k/i&scedil;lem guard&rsquo;lar&inodot;; perf &amp; observability. ￼ ￼
 
 
 
 
 
 
 
 G&uuml;n Ba&scedil;ar&inodot; Kriterleri (KPI)
 
 
 
 
 &bull; : Design system + auth/guard iskeleti + RFQ tablo MVP (statik). ￼
 
 
 
 
 &bull; : Canl&inodot; RFQ (WebSocket) + AI a&ccedil;&inodot;klama paneli + BI v1 (KPI widget&rsquo;lar&inodot;). ￼
 
 
 
 
 &bull; : E-&Idot;hale canl&inodot; ak&inodot;&scedil;, raporlar, perf budget, e2e hatt&inodot;, observability. ￼
 
 
 
 
 &bull; S&uuml;rekli hedefler: Lighthouse +, p95 TTFB &lt;500ms (SSR), p95 WS RT &lt;150ms, A11y ihlali &ldquo;0&rdquo;.
 
 
</div>

Explore 102+ Javascript developer in Istanbul this December. Find roles across top companies and apply now to boost your career.

102 javascript developer jobs IN Istanbul

Web Developer

Software Engineer

Senior Frontend Developer

React Developer - Web (Onsite)

Fullstack Developer

Senior Lead Frontend Developer (Web & Mobile)

Senior Frontend Developer