What I built, solo.
Built the entire platform solo, end to end
Sole engineer on the product: architecture, NestJS backend, Next.js dashboard, infrastructure and CI/CD, all of it.
Hexagonal / DDD backend across ~24 modules
Use cases over Drizzle ORM with domain entities and a repository pattern, CQRS-lite reads, and RBAC (role, project and client scopes) enforced by guards on the presentation layer.
End-to-end type safety with ts-rest
Shared contracts in one package are the single source of truth for client and server, so a backend change that breaks the frontend fails at compile time, not in production.
Tested and shipped on CI
Vitest integration tests against a real Postgres in Docker, Playwright E2E, and GitLab CI/CD.
Integrated three marketplaces
Wildberries, Ozon and Yandex.Market: encrypted API credentials, nightly stats pipelines and orders ledgers on BullMQ crons.
Built the attribution engine
Links each publication to a marketplace article card from three sources (manual, parsed-from-caption, and Wildberries substitute-article resolution via search.wb.ru), unified behind one SQL view.
Funnels, uplift and three-tier reports
Sales funnels, organic-vs-promo uplift and heatmaps, surfaced as role-based reports (admin, manager, client) with Excel export.
BullMQ pipelines with an adaptive scheduler
Metric collection, caption parsing and nightly marketplace refresh run as queued workers; the metric scheduler adapts polling frequency to a publication's age.
Cost-controlled scraping
The paid metrics provider bills per request including 404s, so a deleted post goes terminal after the first 404 instead of spamming paid calls; spend is tracked in Redis with low-balance alerts.
Observability and resilience
Sentry and Prometheus, proxy rotation, dead-letter handling, and encrypted nightly Postgres backups to a separate bucket.
BullMQ render pipeline
Generates short videos end to end: ElevenLabs TTS voiceover, Whisper ASR for word-timed subtitles, and an ffmpeg render on dedicated workers with S3 presigned uploads.
Sub-3s job cancellation
A render job can be cancelled mid-flight: the worker polls job status and aborts the active ffmpeg process within three seconds.
What Massposting does.
Used by SMM agencies, Marketplace sellers.
Private commercial project. Screenshots use demo data; the live product and source are available on request.