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

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. 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 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 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

• 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

• 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

• Experience with ClickHouse, Kafka, Kinesis, or NATS
• Familiarity with Kubernetes, AWS, and distributed architectures
• Interest in event-driven design, streaming pipelines, or gRPC-based communication
• A passion for debugging, optimizing, and monitoring complex systems

• "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.

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