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AI Platform Engineer

Remote, Europe·Added 2 days ago (last checked 30 Oct)

JustMarkets

74 open roles

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Our summary

Work mode: Remote (Europe)
English: Required
Experience: 5+ years
Education: University degree
Benefits: Private health insurance, gym access

Visa options

The ad doesn’t mention sponsorship
Not a refusal, but not a yes. Worth asking in your first message.
May fit the digital nomad visa
A remote job for a company outside Spain: you apply yourself, no sponsor needed. It asks for about €2,849 a month in remote income.

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Skills

Requirements

What we're looking for

5+ years of experience in backend development.
Strong proficiency in Python or another modern backend language (Go, TypeScript, Rust), with a willingness to work with Python as our primary platform language.
Deep understanding of distributed systems (async queues, rate limiting, retries, circuit breakers, failover mechanics).
At least 1 year of hands-on experience working with AI/LLM-based solutions.
Practical experience with LLM APIs (OpenAI, Anthropic, Gemini): streaming, tool calling, context management, and rate limits.
Hands-on experience building AI agents or agentic workflows.
Solid knowledge of observability (metrics, logs, tracing),
Experience with Docker, Kubernetes, and Cloud (AWS or GCP).
Strong logical thinking, high ownership, initiative, and product mindset.
English - Intermediate or higher.

Nice to have

Experience building developer platforms, internal tooling, API Gateways, or SDKs.
Hands-on experience with MCP (Model Context Protocol), RAG pipelines, or vector databases.
Experience with LLM observability and evals tools (Langfuse, LangSmith, OpenTelemetry).
Active personal AI adoption (demonstrated use of AI tools/agents to automate own workflows).
Degree in Computer Science, Software Engineering, or a related field.

Pay & benefits

What you'll get

20 paid vacation days per year
10 paid sick leave days per year
Public holidays as per the company's approved Public holiday list
Medical insurance
Professional education budget
Language learning budget
Wellness budget (gym membership, sports gear and related expenses)

The role

We are looking for a Senior AI Platform Engineer to build and own our company-wide AI platform from the ground up - a reliable, secure, and cost-transparent foundation that empowers every team to leverage LLMs and delegate work to autonomous AI agents. In this role, you will take full ownership of the platform's core architecture and drive internal adoption across the entire company. You will lead the delivery of our internal LLM gateway as the single entry point for all model providers - complete with team quotas, cost tracking, and automated failovers - while establishing an observable shared platform with monitoring and alerting. In parallel, you will ship native internal SDKs for our primary tech stacks, deploy an Agent Control Plane enabling teams to orchestrate and track autonomous workflows, and partner directly with internal squads to turn high-impact business use cases into production-grade solutions.

What you'll do

Architect, build, and operate the internal LLM Gateway, including routing, rate limiting, quotas, cost tracking, and automated fallbacks.
Design and build the agent control plane, covering agent creation, context management, task execution, and state tracking.
Build and maintain internal SDKs to simplify LLM integration across teams.
Implement platform observability, monitoring, alerting, tracing, and evaluation of LLM and agent workflows, including latency, token usage, costs, and failovers.
Implement security and governance for LLM usage and AI agents.
Collaborate with internal teams to translate business needs into working AI solutions and drive AI adoption.
Evaluate build-vs-buy options and integrate relevant open-source tools where appropriate.

How you'll work

Opportunity to work remotely

Hiring process

Application review, one or more interviews, then an offer; described as fast and easy 1 interview

Applications are reviewed quickly and candidates are kept informed at every step.

About JustMarkets

JustMarkets is a global fintech company operating in the multi-asset brokerage space, providing retail and institutional clients with access to trading in forex, commodities, indices, and shares. The company has grown into an international brand with a significant presence across multiple regions, including Europe, Asia, and Latin America, and is known for its proprietary trading platforms and customer-centric approach.

In Spain, JustMarkets has established a dedicated hub to support its growing client base and expand its European footprint. The company's Spain office is a key part of its global operations, offering roles in engineering, product, design, marketing, and finance. For international professionals, JustMarkets presents opportunities to work in a fast-paced, multicultural environment, with a strong emphasis on technology and data-driven decision-making, making it an attractive option for those looking to build a career in the fintech sector in Spain.

Industry: Fintech
Founded: 2012
Employees: 500–1,000
Headquarters: Limassol, Cyprus
In Spain: Madrid

Good to know if you are moving

The company's global HQ is in Limassol, Cyprus, but its Spain office in Madrid is a key hub for European operations, offering a range of roles in tech, product, and marketing.
JustMarkets is a global fintech company, so English is likely the working language, making it accessible for international professionals.
The company offers a modern tech stack and data-driven approach, which can be appealing for engineers and data specialists.
Roles in Spain span a wide range of functions, from engineering and design to finance and HR, indicating a multi-disciplinary environment.
As a regulated broker, the company offers a stable and compliance-focused work environment, which is a plus for professionals from the financial sector.

All open roles at JustMarkets