At Wingify, we're building the future of experimentation. Millions of users interact with products powered by VWO every day, and our SDKs help thousands of developers run feature experiments, feature rollouts, and personalization experiences at scale.
We're looking for an engineer who enjoys building developer-facing platforms, crafting reliable SDKs, and shipping AI-powered product capabilities. You'll work across multiple programming languages, own critical infrastructure used by customers worldwide, and help shape how AI enhances experimentation and decision-making.
What You'll Do
Build and Own Developer SDKs
- Design, build, and maintain VWO's customer-facing SDKs across multiple languages, including Node.js, Java, Python, PHP, Go, and Ruby.
- Own the complete SDK lifecycle—from API design and implementation to versioning, backward compatibility, release management, and developer documentation.
- Continuously improve SDK performance, reliability, usability, and developer experience.
- Partner closely with product and backend teams to deliver robust integrations and platform capabilities.
Develop AI-Powered Product Experiences
- Build AI-driven features that help customers experiment faster, automate workflows, and make better product decisions.
- Integrate and evaluate LLM-based capabilities using commercial and open-source models.
- Contribute to AI workflows, prompt engineering, evaluation frameworks, and product intelligence initiatives.
Drive Quality and Reliability
- Build and maintain automated testing frameworks for SDKs and product features.
- Develop unit, integration, end-to-end, and performance test suites.
- Improve release quality through automation, CI/CD practices, and observability.
- Investigate customer-reported issues, troubleshoot production problems, and leverage modern AI-assisted development tools to accelerate resolution.
What We're Looking For
Required
- 2+ years of professional software engineering experience with a strong backend or platform engineering focus.
- Experience building or maintaining SDKs, developer tools, libraries, APIs, or platform infrastructure.
- Strong programming skills in at least one of Node.js, Java, PHP, Python, or Go.
- Solid understanding of REST APIs, distributed systems fundamentals, and software design principles.
- Hands-on experience integrating LLMs or GenAI capabilities into applications using platforms such as OpenAI, Anthropic, or open-source models.
- Experience writing automated tests, including unit, integration, and end-to-end tests.
- Practical experience with databases and infrastructure technologies such as MySQL, Redis, Docker, and BigQuery.
- Strong engineering fundamentals around code quality, debugging, performance, testing, and CI/CD.
Nice to Have
- Experience building and maintaining public SDKs with a focus on backward compatibility, version management, and developer experience.
- Experience with AI developer tooling such as LangSmith, LangFuse, evaluation frameworks, or agent workflows.
- Familiarity with feature flagging, A/B testing, experimentation platforms, or progressive rollouts.
- Experience building features behind feature flags and measuring rollout success through experimentation metrics.
- Experience developing cross-platform SDKs or contributing to open-source projects.
- Exposure to cloud-native environments, containerized systems, and observability platforms.
- Experience with performance optimization, monitoring, and production reliability engineering.
- Comfort working in fast-moving product environments with evolving requirements and high ownership.
Why Join Wingify?
Own Meaningful Problems
Operate with the speed and autonomy of a startup while benefiting from the scale and stability of an established product company.
Build Products Developers Love
Your work will power SDKs and experimentation infrastructure used by thousands of developers worldwide.
Work at the Intersection of AI and Experimentation
Help define how AI improves experimentation, automation, decision-making, and product development workflows.
End-to-End Ownership
Take ideas from concept to production, interact directly with customers, and influence product direction.
Learn from Strong Peers
Work with a highly experienced team that values craftsmanship, simplicity, technical excellence, and customer impact.