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The #1 platform that brings everything marketing and customer engagement teams need in one place, to become unstoppable.
The Role
Design, implement, and maintain scalable backend APIs and services using Go/PHP/Node.js. Integrate AI-powered developer tools into workflows, experiment with emerging AI approaches, mentor teammates, monitor and optimize system performance, and uphold strong engineering practices (testing, observability, documentation).
Summary Generated by Built In
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 PHP and Go or Node.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 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 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!
What You Will Do
- Use AI-powered development tools as part of your daily engineering workflow to improve how you design, implement, test, debug, document, review, and ship software.
- Designing, implementing, and maintaining APIs, services, and backend systems with a strong focus on scalability, reliability, and maintainability.
- Experimenting with emerging AI development approaches and helping the team adopt practical, high-impact engineering workflows.
- Identifying and solving complex technical challenges creatively and effectively.
- Nurturing a team culture that fosters collaboration, high performance, continuous learning, and responsible experimentation.
- Providing guidance and support to team members, helping them develop their technical skills and improve their modern engineering practices.
- Monitoring and optimizing key system and product performance metrics.
What You Will Need
- You've had 4+ years of designing highly scalable and highly available systems, most of it in Go.
- You have practical experience using AI-powered developer tools such as Claude Code, GitHub Copilot, ChatGPT, OpenAI Codex, Cursor, or similar.
- You can apply AI tools effectively across design, implementation, testing, debugging, refactoring, documentation, and code review.
- You take pride in your engineering practices.
- Quality, testing, observability, and documentation are not an afterthought for you.
- You are comfortable working in ambiguous, fast-moving technical areas where best practices are still evolving.
- You are a good communicator and fluent in English.
- Experience with agentic AI development patterns such as tool/function calling, RAG, multi-step workflows, human-in-the-loop systems, agents, skills, hooks, or plugins.
- Experience with LLMs, prompt engineering, Agent SDKs, or AI orchestration frameworks such as Strands Agents, LangChain, LlamaIndex, or similar.
- Experience evaluating emerging AI developer tools and translating useful practices into team-wide engineering standards.
Preferred Qualifications:
Bonus points if you have previous mobile experience.
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.
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.
Please follow Insider One on LinkedIn, Instagram, X, Facebook and Medium!
Skills Required
- 4+ years designing highly scalable and highly available systems, most of it in Go
- Experience building and maintaining backend APIs, services, and systems with focus on scalability, reliability, and maintainability
- Practical experience using AI-powered developer tools (examples: Claude Code, GitHub Copilot, ChatGPT, OpenAI Codex, Cursor)
- Ability to apply AI tools across design, implementation, testing, debugging, refactoring, documentation, and code review
- Strong engineering practices including quality, testing, observability, and documentation
- Comfortable working in ambiguous, fast-moving technical areas and strong communication skills (fluent English)
- Experience with agentic AI patterns, LLMs, LangChain, LlamaIndex, Agent SDKs, RAG, or AI orchestration frameworks
- Previous mobile development experience
Insider One Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Insider One and has not been reviewed or approved by Insider One.
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Fair & Transparent Compensation — Pay sentiment trends generally positive overall, with pay described as competitive in some roles and markets. Recent role-specific ranges and compensation benchmarks suggest market-aligned pay bands in several functions.
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Strong & Reliable Incentives — Bonus structures and performance-linked earnings potential appear to meaningfully increase total compensation, particularly in commercial roles. Variable pay and commission mechanics are portrayed as providing upside when targets are achieved.
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Leave & Time Off Breadth — Time-off policies are described as generous, including an unlimited PTO approach and in some cases additional holiday time. Flexible working hours also contribute to perceived time-off and flexibility value.
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The Company
What We Do
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. 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. Insider One provides the ultimate vendor experience, proven in fifteen industries and more than 30 countries for more than a decade, to help teams be first, be focused, and be progressive, redefining what it means to lead in customer engagement. Trusted by 2,000+ customers, including some of the world’s most loved brands like Samsung, L’Oréal, Unilever, Allianz, ING Group, Toyota, Singapore Airlines, and GAP, to accelerate growth, build customer love, and become a market leader. Loved by customers, recognized by analysts, Insider One is the only vendor recognized as the #1 leader in all the capabilities marketing and customer engagement teams need, including AI, Customer Data Management, Cross-Channel Journey Orchestration, and Personalization, offering brands unrivaled product excellence within a single consolidated platform. Accolades include: - Leader in the IDC MarketScape: Worldwide AI-Enabled Marketing Platforms for Enterprise Companies 2025 - Leader in the Gartner Magic Quadrant for Personalization Engines, 2025 - #1 Customer Choice: 2025 Gartner Voice of the Customer for Personalization Engines - Leader in the Forrester Wave for Experience Optimization Platforms, Q4 2024 - The Gartner Customers’ Choice for Multichannel Marketing Hubs in 2025 - The #1 G2 Leader in 11 categories, including CDP, Personalization Engines, Mobile Marketing, Customer Journey Analytics, SMS Marketing, WhatsApp Marketing, eCommerce Search, and eCommerce Personalization, with a perfect 100/100 user satisfaction score.
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