Experienced Full Stack Developer for Self-Hosted E-Mail Server Needed

We’re an experienced US-based team building production-grade AI web apps in business, finance, and productivity. We’re looking for an experienced full stack developer who enjoys taking on responsibility for a wide variety of projects, and who can ship features, fix errors quickly, while also keep systems secure and reliable.

You’ll design, build, and operate a multi-tenant, self-hosted email/CRM MVP centered on listmonk + PostgreSQL, integrating an outbound MTA stack (Postfix or ZoneMTA) with Rspamd, OpenDKIM, and OpenDMARC to ensure deliverability and compliance.

Responsibilities include wiring APIs and a lightweight tenancy gateway, implementing automated domain/IP warm-up and provider-aware throttling, automating DNS (SPF/DKIM/DMARC, tracking CNAMEs) and TLS/ACME, and handling bounce/FBL ingest via webhooks into global/tenant suppressions.

You’ll craft segments (partial SQL), templates (Go templates/MJML pipeline), and the end-to-end send path (render, track, rate-limit), plus a small admin UI for quotas, pools, and health. You’ll setup observability (Prometheus/Grafana/Loki), logs and alerts for bounces/complaints/deferrals, security of keys/secrets, and List-Unsubscribe/one-click compliance. Strong Docker/Compose, Postgres performance, and Go and/or Node for services are expected, along with clear documentation and readiness to troubleshoot deliverability at the ISP/provider level.

We are looking for experienced candidates for this role. If this sounds like a good fit for you, please apply with:

1. Your name and background

2. Links to your related email work (repos, shipped apps, references/case studies)

3. Your availability and hourly rate