Senior Platform Engineer: AI-Driven Fintech SRE

Tangible; Lisboa; On-site; EUR 60,000 - 90,000; Full time

Job summary

Tangible is seeking a Senior Platform Engineer / SRE to own the foundation of a multi-tenant AWS environment, ensuring reliability, security, and cost efficiency. You will write Python and TypeScript, and shape platforms used by AI agents and human engineers alike.

You will define SLIs/SLOs per client, lead incident response, and build guardrails so automation scales without sacrificing safety. This role emphasizes ownership and practical engineering in production.

Qualifications

• 5+ years in platform engineering, SRE or infrastructure roles.
• Deep hands-on AWS experience: compute, networking, IAM, RDS, observability.
• Strong Terraform (or similar) experience, and CI/CD with GitHub Actions.
• Production-grade Python and/or TypeScript/Node.js. You build services, not just glue scripts.
• Solid PostgreSQL operational knowledge: performance, locking, backups and safe migrations.
• Real experience with observability (metrics, logs, traces) and running incidents.
• You already work daily with AI coding agents and can show workflow changes and guardrails.
• Clear written English and startup ownership mindset.

Responsibilities

• Own Tangible's AWS estate end to end (ECS Fargate, RDS Postgres, Redis, S3, ALB, KMS, Lambda), with a separate environment for each client tenant.
• Define SLIs and SLOs per tenant, set error budgets, and build alerting that pages on customer impact, not noise.
• Lead incident response, blameless postmortems and long-term fixes including migrations that take locks.
• Keep everything in Terraform: reproducible environments, drift detection, and rapid tenant environment creation.
• Make costs visible and down, broken out per tenant and per service, including LLM token spend.
• Design environments where AI coding agents can work safely: sandboxed preview environments and short-lived credentials.
• Turn standards into automated checks in CI (policy as code, security scanning, schema-change gates, contract checks).
• Write runbooks and operational knowledge so agents can do first-pass incident triage.
• Build internal tools and services in Python and Node.js/TypeScript that remove manual work for the engineering team.

Skills

Platform engineering

AWS expert

Terraform

GitHub Actions

Python

TypeScript

PostgreSQL

Observability

AI workflows

Security/compliance

Tools

Terraform

AWS ECS Fargate

PostgreSQL

Redis

S3

ALB

KMS

Lambda

Job description

Tangible is seeking a Senior Platform Engineer / SRE to own the foundation of a multi-tenant AWS environment, ensuring reliability, security, and cost efficiency. You will write Python and TypeScript, and shape platforms used by AI agents and human engineers alike.

You will define SLIs/SLOs per client, lead incident response, and build guardrails so automation scales without sacrificing safety. This role emphasizes ownership and practical engineering in production.