Infrastructure Tech Lead

What You'll Do

• Ship features across the stack, back end and front end, in your first months to learn the product, the codebase and the teams

• Lead architectural and infrastructure initiatives end to end, from design to production: modernizing our mature PHP monolith,  into microservices architecture , converting background processing to (TypeScript/Python) serverless on AWS, improving observability, and scaling our analytics on ClickHouse

• Make key technical decisions and set best practices: system design, data models, code quality and testing, and when to bring in new technologies

• Shape our agentic SDLC: how we plan, build, review and test with AI coding agents, and the guardrails around it

• Write and review critical code across the stack, front end included, and mentor engineers through design and code reviews

• Share ownership of production, including the on-call rotation

• Work closely with Product, team leads and engineers across R&D to turn business needs into sound technical plans

What We're Looking For

• 8+ years of hands-on software development, building and running web applications at scale

• 2+ years as a tech lead, architect or in a similar role, leading the design and delivery of cross-cutting projects

• Strong experience with at least one backend language (PHP, TypeScript/Node.js, Python, Java, C# or similar)

• Hands-on experience with an agentic SDLC: using AI coding agents (Claude Code, Codex, Cursor or similar) to plan, write, review and test code

• Experience evolving a large legacy codebase: refactoring, upgrades and incremental migrations while the product keeps shipping

• Deep experience with MySQL or another relational database, including data modeling and performance at scale

• Hands-on experience with AWS

• Hands-on experience with infrastructure as code (CloudFormation, Terraform, Pulumi or similar)

• Excellent communication skills and the ability to work across teams and departments

• Fluent English

A Plus If You Have

• Experience with PHP

• Experience with more than one backend ecosystem, such as PHP alongside TypeScript or Python

• Experience with a modern front-end framework, especially Vue.js

• Experience designing and running serverless systems on AWS (Lambda, SQS, EventBridge, Step Functions, DynamoDB, OpenSearch Serverless)

• Experience with analytical databases (ClickHouse or similar)

• Experience with NoSQL, search and in-memory stores (CouchDB, OpenSearch, Redis or similar)

• Experience with event-driven architecture and background processing at scale

• Experience building LLM-powered product features

• Experience working on complex B2B SaaS applications