Join a fast moving AI startup building tools that scale growth effortlessly.
At Deep Matter AI, we’re reimagining how marketing and sales teams operate. Founded in June 2024, we build AI powered tools that automate campaigns, manage leads, and integrate seamlessly with the platforms businesses already use, from ad networks to CRMs, social media, and generative AI.
We're now looking for an API Developer to join us on this journey.
About the role
You’ll help us develop a centralised SaaS platform that connects to a wide range of third party services, enabling end to end marketing and sales automation with minimal human input. Your work will directly shape the backbone of our platform.
You'll be responsible for:
* Integrating external APIs from platforms like Google Ads, Meta, LinkedIn, Instagram, and others
* Connecting with CRM and marketing tools, AI services (e.g. language models, voice tools, generative content platforms), and social channels
* Building and maintaining internal APIs to support our platform's core functions
* Handling authentication flows (OAuth 2.0), webhooks, and scalable data pipelines
* Supporting our automation workflows using tools like n8n
* Implementing and optimising integrations with multiple CRM systems
* Working with large language models (LLMs) and multimodal AI tools for text, image, and video generation
* Integrating voice agents and speech tools such as ElevenLabs and related platforms
What we’re looking for
* Strong experience with RESTful APIs, OAuth, and webhook based systems
* Comfortable working with multiple third party APIs and handling edge cases
* Familiar with automation platforms (e.g. n8n, Zapier, Make) and event driven systems
* Solid knowledge of backend development (language flexible, but JavaScript/TypeScript or Python preferred)
* Hands on experience with LLM integration and prompt orchestration for text, image, and video use cases
* Practical experience with voice agents and speech synthesis APIs
* A self starter who thrives on autonomy and enjoys solving real world problems with clean, practical solutions
* Ideally based in the UK or a similar timezone, and able to work in person from our London office
Why join Deep Matter AI?
* Build meaningful systems from the ground up in a lean, ambitious team
* Work with cutting edge AI tools and a modern automation first tech stack
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* Enjoy the freedom to shape how things are built and see your work have real impact fast
* London based with flexible working hours and a culture that values trust, clarity, and momentum
Sound like your kind of role? Let’s talk.
Drop us a message or apply directly. We’d love to hear from you.
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