Senior Fullstack Engineer - Go​/PHP​/Node.js & Vue.js - Europe

About Us

We are Insider, the fastest-growing global Mar Tech 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, She Codes, She Leads, and She Markables, 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.

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 Node.js and Vue.js.

• 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 Node.js, focusing on building systems that scale.

• You have strong backend development experience with Go and/or Node.js, PHP Laravel.
• You have strong frontend development experience with Vue.js.
• You enjoy working on data‑heavy systems, especially where performance at scale is critical.
• You’ve worked with databases like Postgre
  
  SQL, 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 Click House, 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,…