Senior DevOps Engineer

Railsware is seeking a Senior DevOps Engineer to support Mailtrap's production infrastructure, a multi-region AWS platform for high-volume email sending and testing. The role owns infrastructure reliability, security, cost efficiency, automation, and a strategic partial migration of selected workloads to rented bare-metal or colocation infrastructure. The engineer will design the hybrid platform, lead migration planning and execution, and coordinate cutovers, vendors, and engineering teams.

Responsibilities:

• Operate and evolve AWS multi-account / multi-region infra
• Terraform modules/workspaces
• Ensure safe infrastructure changes across network, storage, and services, with zero-downtime deployments
• ECS services, blue/green deploys, Docker image pipelines
• Reliability: CloudWatch/PagerDuty/Sentry, capacity, cost tags
• Security baseline: IAM, secrets (SSM), Cloudflare edge rules
• Partner with engineers on release automation and production readiness
• Maintain the hybrid estate (AWS and rented bare metal) as one operable platform
• Build the business and technical case for what moves off AWS vs what stays
• Design the rented bare-metal / colo landing zone (compute, network, storage, observability, secrets)
• Produce migration waves, dependency maps, cutover/rollback plans
• Stand up hybrid connectivity and dual-run periods; shift traffic safely (e.g. via Cloudflare)
• Replace or re-home managed services where it pays off (compute, queues, search, cache, MTA nodes)
• Coordinate colo/vendors, timelines, and eng teams; report progress and risk

Requirements:

• • 5+ years DevOps/platform (senior), production ownership
• • Deep AWS (VPC, ECS, IAM, RDS/ElastiCache or equivalents, networking)
• • Terraform at scale (modules, remote state / Terraform Cloud)
• • CI/CD with GitHub Actions, including automated deploys to production (e.g. blue/green deployments)
• • Containers (Docker); comfortable operating services on ECS or K8s
• • Strong Linux networking (DNS, TLS, load balancing, firewalls, VPN/hybrid)
• • Proven experience planning and executing migration to on-prem, colo, or private cloud (partial/hybrid OK — full exit not required)
• • Comfortable owning a multi-quarter infra initiative: TCO, design, vendors, cutover, rollback
• • Comfortable automating operational tasks with shell and/or Python
• • Fluent English (both spoken and written)
• • Colo/bare-metal ops: IPAM (NetBox), Ansible, image-based provisioning (Packer or equivalent), HAProxy/Nginx
• • Replacing managed AWS services with self-hosted (Postgres HA, Redis/Valkey, Kafka, OpenSearch)
• • Email infrastructure (MTA, SMTP, IP reputation, DKIM/SPF/DMARC) — Halon or similar
• • Cloudflare (DNS/WAF/Access)
• • Observability beyond CloudWatch (Prometheus/Grafana/Loki or equivalent)
• • Prior work with multi-region SaaS or EU data residency
• • Cost-driven architecture / FinOps mindset
• • GCP (BigQuery/certificates)
• • Comfortable reading Ruby or Go (used in our services and tooling)
• • AWS Certificates