Senior Platform Software Engineer

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Senior Platform Software Engineer in Others

Preply
Full time
Email

Others
09/19/2026
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Barcelona, Spain

Responsibilities

Design and build AI agents and their supporting harnesses using Python.
Build reusable agent capabilities, tools, and integrations connecting AI systems with codebases, engineering systems, internal tools, and organizational knowledge.
Develop agentic workflows for Engineering, Product, Design, and Data teams across the software development lifecycle.
Prototype, validate, measure, and scale new AI automation approaches.
Design context management, orchestration, verification, and human-in-the-loop mechanisms for reliable automation.
Measure agent usage and value through data and feedback, and continuously improve the systems.
Identify appropriate uses of AI while preserving essential human judgment.
Collaborate with engineering, design, product, and data teams to understand workflows, drive adoption, and identify automation opportunities.

Requirements

Approximately 8 years of experience designing and building complex backend software systems.
Strong production software engineering experience with Python.
Hands-on experience building AI agents, agentic workflows, or platforms that enable others to use AI-powered capabilities.
Strong understanding of context management, tool use, orchestration, and evaluation or verification for agentic AI systems.
Experience integrating AI systems with APIs, MCPs, internal tools, codebases, and other engineering systems.
Experience turning experiments or proofs of concept into robust, scalable solutions.
Ability to work with ambiguity, iterate quickly, and use data and feedback to evaluate results.
Good understanding of distributed systems and backend architecture for reliable AI-powered systems.
Strong product thinking and ability to connect technical solutions to measurable outcomes.
Strong communication skills and minimum C1 English proficiency.

Benefits

Open, collaborative, dynamic, and diverse culture.
Monthly allowance for Preply lessons, a Learning & Development budget, and time off for self-development.
Competitive financial package including equity, leave allowance, and health insurance.
Attractive relocation package for joining the Preply Barcelona Hub if located elsewhere.
Access to free mental health support platforms.
Access to Gympass-partnered wellness and gym centers throughout Spain.
Opportunity to support learners and tutors through language learning in 175 countries.
The role is based in the Barcelona Hub, with relocation support available for candidates outside Barcelona.

Salary: Competitive

Preply

Preply builds an online marketplace that connects learners with human tutors for live language lessons, supported by AI tools. Consumers book 1:1 sessions and ongoing courses, while organizations use Preply Business for corporate language training; revenue comes from commissions and subscriptions...

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