Tech Lead — Platform

About Loop
The Loop builds LoopOS, the ERP for circularity: trade-in, refurbishment and recommerce operations for leading European retailers. Our platform runs mission-critical operations under contractual SLAs — real stores, real warehouses, real devices moving through it every day. We're entering a new phase: transforming how we do software engineering for an AI-accelerated world, and scaling how fast we bring new clients live.
About Role
You'll be the technical owner of the current LoopOS platform — a multi-app estate of ~15 repositories (Rails backends + React frontends) running on Kubernetes/AWS — and the person who leads its evolution into agentic engineering. This is a hands‐on technical leadership role (~60% of your time in code and infra), not a people‐management role. The team — 4 engineers and 2 delivery/business analysts — keeps its current reporting lines; what you own is the technical direction and the way we work. You'll partner directly with the CTO.
Responsibilities
Own the platform end‐to‐end — architecture, production infrastructure, dev environments, observability, documentation and release cycles across the LoopOS estate.
Operate it reliably — availability and performance KPIs at enterprise clients with contractual SLAs: monitoring, incident response, debugging across code and infra, shipping fixes fast.
Ship — develop new functionality when needed, respond to bugs, manage release cycles.
Accelerate implementations — pair with the delivery/implementation team to bring new clients live on LoopOS, and make each implementation faster than the last (tooling, templates, automation, documentation).
Lead the agentic transformation — introduce AI-accelerated workflows across development, SRE, support, debugging and implementation: agent‐assisted coding, agentic code review, bug‐to‐PR loops, context engineering for our repos. You'll have carte blanche and budget — and you'll be measured on real, adopted change in how the team ships, not on theoretical plans.
Be the technical voice with clients — join implementation and pre‐sales discussions at the technical layer (mostly remote; occasional travel).
Requirements
A senior engineer who has owned production platforms end‐to‐end — architecture, infra, reliability
ideally across Rails/React or comparable full‐stack estates.
Strong on Kubernetes, AWS, infrastructure‐as‐code and observability; comfortable being accountable for SLAs. Already AI‐native: agentic coding tools (Claude Code, Cursor or similar) are part of your daily work, and you have opinions from practice, not from posts about what works.
A pragmatic change leader: you bring a team along by shipping improvements they feel, not by mandating process.
A clear communicator in English, comfortable in technical client conversations. Portuguese is a plus.
Bonus: ERP / retail / logistics domain, multi‐tenant SaaS, release management of client‐specific deployments.
Tech stack : Ruby on Rails · React · Kubernetes · AWS · Terraform · Helm · GitLab CI/CD · Datadog · Sentry