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Senior AI Engineer - Growth en España, España - Jobeax

Senior AI Engineer - Growth en España, España is listed on Jobeax. Browse 80,000+ vacancies available.

Building the Future of Open Finance

Payward - the parent company behind Kraken, NinjaTrader, Breakout, xStocks, Payward Services and CF Benchmarks - has spent the last 15 years building one of the most modern and globally accessible financial infrastructure platforms in the industry, built to advance an open, global financial system.

Before you apply, we encourage you to explore our culture page to understand what drives us and how we work.

The team

Founded in 2011, Kraken is one of the world's longest-standing crypto platforms, trusted by over 10 million individuals and institutions across the globe. It offers spot trading, margin, futures, staking, and OTC services, with products built for both individual investors and institutional clients.

You’ll work directly with the AI Growth Infrastructure Lead, the Growth Workflow Specialists across channels, and the domain experts who spec the workflows you build. You’ll operate within the Growth Foundations Group — the centralized team that builds the engine every product team in the business runs on.

The Role

We’re building an AI-native growth engine — one where agents make distribution decisions, creative is generated and iterated at scale, and the system compounds intelligence across every product simultaneously. This is not automation bolted onto existing workflows. It is a new model entirely.

As AI Engineer, Growth, you will be the second builder on this engine. Working alongside our lead architect, you execute — building, shipping, and iterating the agent orchestrations, automated workflows, and system integrations that power every growth work-stream: paid growth, lifecycle, organic search, CRO, incentives, referrals, and beyond.

This role is for someone who moves fast, builds from specs without needing hand-holding, and cares deeply about the quality of what they ship. If you’ve spent your career wanting to build systems that actually run growth rather than just support it — this is that role.

What You’ll Build

Agent orchestration workflows across growth use cases — automating the decisions and executions that today require human intervention across paid media, lifecycle messaging, organic content, conversion optimization, incentives, and other growth levers
Integrations between our AI reasoning layer, growth execution platforms, data infrastructure, experimentation systems, and analytics tools
Shared agent infrastructure components — reusable workflow patterns, prompt libraries, and integration clients that every growth workstream draws from
Monitoring and audit logging — ensuring every agent action is traceable, versioned, and queryable for governance and continuous improvement
Creative and content generation pipelines — automating the brief-to-variant-to-distribution loop across growth channels

What You’ll Own

Build velocity across new growth workstreams — you are the person who gets workflows from spec to production
Integration reliability — connections between systems work, handle errors gracefully, and are maintained as tools evolve
Workflow documentation — every workflow you build is documented clearly enough that a domain specialist can understand, tune, and improve it without your involvement

What You Bring

3+ years building automation workflows, integrations, or agentic systems — using AI orchestration platforms, workflow automation tools, or equivalent technologies
Strong understanding of API integrations — REST, webhooks, authentication patterns, and error handling at scale
Experience working with LLM APIs — prompt engineering, structured outputs, tool use, and agent chaining
Comfort working from a spec — you can take a workflow design and build it accurately without the architect in the room
Growth or marketing context — you understand what you’re building toward, not just how to build it
Speed and quality in balance — you ship fast and you care what you ship

Nice to haves

Experience with paid media platforms, marketing automation, CRM, or lifecycle messaging systems
Familiarity with data warehouse query patterns and event tracking infrastructure
Background in a high-growth fintech, consumer tech, or multi-product technology environment
Experience designing multi-agent architectures or complex agent-to-agent workflows

Our commitment

Payward is powered by people from around the world and we celebrate the diverse talents, backgrounds, contributions, and unique perspectives that everyone brings to the table. We hire based on merit, seeking out people with the right abilities, knowledge, and skills for the job. We encourage you to apply for roles where you don't fully meet the listed requirements, especially if you're passionate or knowledgeable about crypto.

We may ask candidates to complete job-related skills or work-style assessments as part of our hiring process. These assessments evaluate competencies relevant to the role and are applied consistently across candidates for similar positions. Results are considered alongside experience and interviews, and are not the sole basis for any employment decision.

As an equal opportunity employer, we don't tolerate discrimination or harassment of any kind, whether based on race, ethnicity, age, gender identity, citizenship, religion, sexual orientation, disability, pregnancy, veteran status, or any other protected characteristic as outlined by federal, state, or local laws.

Unless a specific application deadline is stated in the job posting, applications are accepted on an ongoing basis.

Please note, applicants are permitted to redact or remove information on their resume that identifies age, date of birth, or dates of attendance at or graduation from an educational institution.

We consider qualified applicants with criminal histories for employment on our team, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.

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