Senior Platform Engineer – AI Developer Experience

Location: Default in-person at the office in Barcelona

Company

hirify.global operates digital marketplaces across Europe and beyond, including Kleinanzeigen, Leboncoin, Marktplaats, Subito, and mobile.de.

What you will do

• Build secure execution environments for agents, including sandboxing, runtime isolation, network policies, secrets management, RBAC, approvals, and auditability.
• Develop adapters and gateways for source control, CI/CD, ticketing, documentation, cloud, and observability systems across multiple marketplaces.
• Create evaluation pipelines with golden tasks, graders, regression tests, and release gates to measure agent correctness.
• Implement observability and cost controls covering traces, telemetry, token usage, cost per workflow, rate limits, and failure handling.
• Build durable orchestration with persisted state, checkpointing, retries, timeouts, cancellation, pause/resume, and recovery after failures or deployments.
• Turn marketplace pilot patterns into reusable templates, starter kits, wrapper scripts, and workflow automation adopted by engineering teams.

Requirements

• Experience building internal developer platforms or developer tooling used by real teams, with users, SLAs, and on-call rotations.
• Production-scale experience designing and operating secure execution environments, including sandboxing, runtime isolation, RBAC, secrets, and audit logging.
• Experience shipping integrations across source control, CI/CD, ticketing, documentation, cloud, and observability systems in polyglot environments.
• Experience building or operating tool gateways, adapters, or MCP-style agent integrations, or equivalent pre-agent systems, with an understanding of their failure modes.
• Experience with traces, telemetry, cost-per-workflow measurement, and evaluation pipelines.
• SRE mindset with focus on reliability, rollback, rate limiting, graceful degradation, and cost control.
• Experience delivering reusable templates and starter kits that engineering teams adopt.
• Experience building or operating durable workflow systems, including persisted state, retries, idempotency, and recovery from partial failures and human approvals.
• Comfort with containers, AWS or equivalent cloud platforms, infrastructure as code, CI/CD, APIs, and scripting languages; experience supporting multiple engineering teams.

Culture & Benefits

• Founding, day-zero position on an ExCo-backed platform team with funding and authority to shape the platform.
• Freedom to choose model providers, integrations, and partners without experimentation gates.
• Engineering teams serve as close internal customers, providing real users from week one.
• Compensation and incentive structure will be shaped according to role seniority, talent requirements, and location.
• Default working mode is in person at the Barcelona office.

Hiring process

• Apply with a CV and a short note; a cover letter is not required.
• Describe the internal platform you are proudest of, including its users, purpose, and what you would change now.
• Explain your view of the right v0 for an agentic platform in a multi-stack, multi-cloud organisation and identify one point in the specification you would challenge.