Insider.
Insider.

Software Developer – Insider-Testinium Tech Hub Cooperation

June 25, 2025
Full-time
Remote · Greater Istanbul
Not Applicable
Back-end Developer
Apply now

Before we talk about the role and what we are looking for, let us tell you who we are.

About Insider

Insider is a B2B SaaS company that helps global brands grow by creating better customer experiences — at scale.

What makes us different?

We are the world’s #1 AI-native Customer Experience and Marketing Platform. Our platform helps marketers build personalized journeys, grow their business, and work more efficiently — all in one tool.

We recently raised $500M in Series E funding, led by General Atlantic. Before that, we became a unicorn (a startup valued over $1 billion), and one of the few woman-led B2B SaaS unicorns in the world.

Today, we are backed by investors like Sequoia Capital, QIA, Riverwood, and Endeavor Catalyst. Over 1,200 global brands trust us — including Samsung, Coca-Cola, IKEA, Nike, and Virgin, as well as fast-growing startups.

We’ve been recognized as a Leader by Forrester and IDC and listed among G2’s Top 1% software companies in the world, ranking #1 in many categories like Customer Data Platforms, Personalization Engines, and Mobile Marketing.

But our story is not just about numbers! We are also proud of the global community we have built. With programs like SheCodes, SheLeads, and SheMarkables, we support education, sustainability, and inclusion across 27+ countries.

At Insider, we move fast, solve real problems, and build with purpose.

About Testinium Tech Hub

Testinium is our trusted partner in software quality and testing. They offer an open-source-based, enterprise-ready platform for test automation on web, mobile, and desktop. Their headquarters is in Istanbul, with offices in Amsterdam, London, and Berlin. Testinium is now the largest software testing company in Europe and the MENA region, with 950+ employees and 350+ projects.

They work with many respected companies in finance, telecom, and e-commerce, like ING, Allianz, PepsiCo, Turkcell, N11, and Udemy.

What team will you join?

You’ll join our Optimus team as a Software Developer. Optimus (Partner Support Development Team) provides technical support behind the scenes. We solve problems, keep our platform running smoothly, and make sure our partners have the best experience. We work fast, solve complex issues, and focus on both product and partner success. In SaaS, partner support means high-quality service — and that’s what Optimus delivers.

What you will do as a Software Developer:

  • Provide technical support to 800+ global partners using JavaScript, HTML, CSS, and Go
  • Fix complex issues on partner websites
  • Join meetings with international clients and give live support when needed
  • Build user-friendly and high-performance web apps
  • Take action to prevent future technical problems
  • Work with other teams to ensure smooth processes
  • Prioritize tasks based on urgency and partner needs
  • Get hands-on experience with Vue.js, Node.js, React, and Go
  • Work in a fast-paced and agile environment

What we are looking for:

  • A degree in Computer Engineering or a related field (or equivalent experience)
  • Good knowledge of JavaScript, jQuery, HTML, and CSS
  • Basic knowledge of backend development and SQL (advanced knowledge is a plus)
  • A proactive and responsible approach to work
  • Fluency in Turkish and English
  • Good problem-solving and analytical thinking
  • Ability to manage time well and work on multiple projects
  • Curiosity and motivation to always keep learning

What we offer you:

  • Tech Talks with famous people in tech, Dev Talks by our own developers, and events full of new ideas
  • Hackathons, coding challenges, and competitions
  • Free access to Laracasts, Egghead, LinkedIn Learning, Blinkist, Masterclass, and Spotify
  • Private Health Insurance
  • Monthly support for food and bill expenses
  • Fun team activities
  • No dress code — We care about your work, not your style!

Before you apply:

We believe the best ideas come from diverse teams. At Insider, we offer a zero-discrimination workplace. Whoever you are and wherever you come from — you are welcome here.

Want to know more about us?

Follow Insider on LinkedIn, Instagram, YouTube, and Medium.

Ready to take the next step in your career?

Apply now and join our journey.