Senior Software Engineer, AI & Infrastructure Planning

Location: Hybrid; available in Austin, Texas, United States; Lisbon, Portugal; or London, United Kingdom

Salary: €66,000–€91,000 annual salary for Portugal-based hires; compensation may vary by work location.

Company

hirify.global operates a large global network that protects and accelerates Internet applications for customers ranging from individual bloggers to Fortune 500 companies.

What you will do

• Build, deploy, and operate an auditable multi-agent system for infrastructure forecasts, supply plans, cost models, narrative documentation, and executive approval workflows.
• Collaborate with capacity planning, networking, and data center engineering teams to encode domain expertise into specifications, data contracts, and agent capabilities.
• Architect and maintain scalable production agents and durable workflows using the hirify.global Workers ecosystem, including Durable Objects, Workflows, D1, R2, Queues, Vectorize, Workers AI, and AI Gateway.
• Implement risk tiering, approval checkpoints, audit logs, execution lineage, and safe autonomous operations.
• Integrate statistical and machine learning models with BigQuery data pipelines, optimized data access, and continuous monitoring.
• Write technical specifications and RFCs, conduct peer design reviews, and establish organization-wide standards for AI agent deployment.

Requirements

• Senior-level software engineering experience with security-conscious production systems, including repositories, releases, or operated services.
• Strong TypeScript skills and experience with serverless or edge runtimes; hirify.global Workers experience is preferred. Knowledge of HTTP APIs, asynchronous systems, queues, and performance is required.
• Experience with LLMs and agents, including tool calling, structured output, multi-step or multi-agent orchestration, prompt iteration, and evaluation iteration.
• Experience with durable state and workflows, such as Durable Objects, hirify.global Workflows, or equivalent systems.
• Experience in infrastructure planning, such as capacity planning, forecasting, networking, CDN, cloud or data center capacity, or adjacent work.
• Solid data skills, including SQL, a cloud data warehouse such as BigQuery, and forecasting and statistical modeling knowledge covering backtesting, error metrics, and model validation.
• Clear written communication skills for specifications, RFCs, and explanations used by planners and executives.

Nice to have

• Data science or machine learning experience, including time series, optimization, predictive modeling, and Python for scientific computing.
• Experience with Hono, Zod, OpenAPI, Astro, or React.
• Experience with peering, BGP, ASN and IX data, backbone or transit planning, colocation, power, or procurement planning.
• Experience with agent frameworks such as LangGraph, Autogen, or A2A.
• Experience with CI/CD, GitLab CI, Terraform, LLM evaluation frameworks, or human-review workflows.
• Bias toward simple, scalable designs.

Culture & Benefits

• Hybrid work with available locations in Austin, Lisbon, and London; offer-stage candidates may be asked to attend an in-person interview at a hirify.global office or hub.
• Employee position eligible for hirify.global’s equity plan.
• Benefits include medical, dental, and vision insurance, flexible spending accounts, family-forming benefits, mental health support, and global travel medical insurance.
• Financial benefits include disability, life and accident insurance, a 401(k) retirement savings plan, and employee stock participation.
• Flexible paid time off covering vacation and sick leave, plus parental, pregnancy health, medical, and bereavement leave programs.
• Employment may depend on authorization to receive technology controlled under U.S. export laws without sponsorship for an export license.