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

Before jumping into all the information about the role and what you can bring to the table, let us introduce ourselves real quick.

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 Whats App, 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, She Codes, She Leads, and She Markables
, 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 Node.js and Vue.js, 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 this interest you, read on for more!

• Build, scale, and maintain backend and frontend services that power Insider One’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…