Senior Fullstack Engineer

Before jumping into all the information about the role and what you can bring to the table, let us introduce ourselves real quick.
About us
We are Insider, the fastest-growing global MarTech scale-up and the #1 AI-native Customer Experience and Marketing platform trusted by enterprise brands worldwide. Our story began with six desks and a vision to create a single platform to make industry-first CX technologies and emerging channels accessible to marketers worldwide. Today, with 1500+ teammates across 50+ nationalities, we continue to push the boundaries of what's possible in CX. Our architecture brings together unified customer data, advanced journey orchestration, and comprehensive AI capabilities by seamlessly blending predictive, generative, and agentic AI into a single customer engagement platform that empowers teams to activate customer engagement across 12+ channels.
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 1200+ brands 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 was congratulated for becoming one of the only woman-founded, women-led B2B SaaS unicorns in the world, achieving $200M in CARR (Committed Annual Recurring Revenue). According to Gartner, we are the dominant leader in Multichannel Marketing. Don't just take our word for it — see for yourself. We consistently outperform and continue our leadership, and the results speak for themselves.
From day one, Insider's mission has not been only to build a world-class product company, but also to create one of the most socially progressive technology communities in the world. Through our corporate 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 27+ 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 across 27+ countries 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 Senior Software Engineer who will help our team create and implement a wide variety of web-based products using Go and PHP-Laravel or and , 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 and Ankara offices, so we produce and develop the technology we export to the world in our own country. As Insider, 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. As we said; we do not wait for jobs or opportunities to come to our feet, we create them ourselves. You can check our Tech Stacks here What you'll be doing as a Senior Software Engineer in Insider:

• Build, scale, and maintain backend and frontend services that power Insider's core analytics systems, which process hundreds of thousands of events per second, manage terabytes of data, and serve real-time insights across 9+ global products
• Maintain and evolve large-scale data stores, ensuring fast, reliable access to analytics data at massive scale
• Work on high-throughput, low-latency systems used by both internal teams and customer-facing dashboards
• Contribute to event ingestion pipelines, API development, data enrichment, and metric generation flows
• Collaborate with backend and data engineers to continuously improve performance, reliability, and observability
• Write clean, modular, and testable code using Go and , focusing on building systems that scale

We'd be thrilled to work with you if:

• You have strong backend development experience with Go and/or , PHP Laravel,
• You have strong frontend development experience with 
• You enjoy working on data-heavy systems, especially where performance at scale is critical
• You've worked with databases like PostgreSQL, Redis, or similar
• You love building real-time systems and care about writing clean, maintainable backend code
• You take initiative, communicate clearly, and don't wait to be told what to fix—you go and fix it

Bonus points if you have:Experience with ClickHouse, Kafka, Kinesis, or NATSFamiliarity with Kubernetes, AWS, and distributed architecturesInterest in event-driven design, streaming pipelines, or gRPC-based communicationA passion for debugging, optimizing, and monitoring complex systems While exporting our technology to the world, we offer you:

• "Tech Talks" with famous and groundbreaking people from the software world, "Dev Talks" where our Software Developers talk about their career steps, and many events where groundbreaking ideas are discussed,
• Hackathons we organize inside that push the boundaries, programming challenges, and coding competitions,
• free access to exclusive services such as Laracast, Egghead, LinkedIn Learning, Blinkist, Masterclass, and Spotify,
• Inclusive Private Health Insurance,
• Smart Work Model side benefits to support food and bill expenses,
• The infamous Team Activities that are bursting with fun,
• No Dress code This is a fast and innovative startup, you can wear whatever you want.
• Remote Work Work anywhere you'd like in Turkey.

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.
Please follow Insider on LinkedIn, Instagram, Youtube, and Medium 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.

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