Senior Software Engineer Golang

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 Software Engineer who 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 affiliated with 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. 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!

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What You Will Do

• Design and maintain high-throughput, low-latency backend systems that process and serve massive amounts of data.
• Collaborate across teams to deliver scalable, reliable, and high-performance solutions used by thousands of enterprise customers worldwide.
• Solve complex technical challenges, from optimizing concurrency and synchronization to debugging distributed behaviors and improving system reliability.
• Monitor and optimize key performance metrics — including throughput, latency, and resource efficiency — ensuring our systems always perform beyond expectations.
• Continuously refine performance, recognizing that even small optimizations can have a massive impact when dealing with high-traffic environments.
• Communicate complex ideas clearly, breaking down intricate technical concepts for both technical and non-technical audiences.

What You Will Need

• You have 3–6 years of backend engineering experience, ideally with Go as your main language.
• You’ve built and operated distributed systems and understand the challenges of concurrency, synchronization, and data consistency.
• You care deeply about performance, reliability, and clean code — and you love making measurable improvements.
• You’re experienced with SQL databases (MySQL, PostgreSQL) and caching systems (Redis).
• You’ve worked with any messaging or queue system (e.g., NSQ, NATS, Kafka, RabbitMQ, or similar).
• You follow best practices across the development lifecycle — from design and reviews to testing and deployment.
• You’re fluent in English and communicate effectively in a global team setting.

• Experience with ClickHouse or other analytical databases.
• Familiarity with real-time messaging systems like Kafka, Kinesis, or NATS.
• Hands-on experience with Kubernetes and AWS infrastructure.
• Interest in event-driven architectures, streaming pipelines, or gRPC-based communication.
• A passion for observability, monitoring, and debugging complex distributed systems.

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.

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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.

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