HI, I'M

HosseinNasiri

Senior Software Engineer | Backend & Applied AI

AI Engineer, Agents & Harness Tooling Tehran, Iran | Open to Relocation Open to new roles

7+ years building backend, platform, and high-scale product systems. Independently built MergeScout, an AI code-review agent adopted across 50+ Tapsi projects, and now contribute to Ripple, Tapsi’s customer data platform.

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About & how I work

What I bring to a project

I build backend, platform, and high-scale product systems. My work spans AI-enabled developer tooling, event-driven data platforms, and the infrastructure needed to operate them.

I independently built MergeScout from problem framing through rollout, and contribute to Ripple’s SDK, ingestion, event-definition, and Kafka-routing work. Earlier work includes real-time systems, developer tooling, and measured web performance improvements.

Applied AI & Developer Tooling

AI Agents LLM Evaluation MergeScout Cost Controls DX

Tool-using code-review agents, LLM evaluation, confidence filtering, and token-cost controls built for developer workflows.

Backend & Data Platforms

Golang Kafka gRPC PostgreSQL Redis

Go services, SDK integration, event definitions, ingestion gateways, and Kafka routing for high-scale product systems.

Platform & Observability

Kubernetes Docker GitLab CI/CD Prometheus Grafana

Kubernetes, Docker, GitLab CI/CD, Envoy Gateway, Prometheus, Grafana, and production reliability practices.

Product Systems & Performance

WebSockets Workbox TypeScript React Web Vitals

Real-time systems, web performance, and independently deployable applications, supported by a foundation in TypeScript and React.

Experience

Where I've worked

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Tapsi | Data Platform & AI · Proficient Software Engineer

Proficient Software Engineer

Tapsi

July 1, 2023 — Current

Built MergeScout, an AI code-review agent adopted across 50+ projects, and contribute to Ripple, Tapsi’s customer data platform.

+Independently built and rolled out MergeScout, an AI code-review agent adopted across 50+ projects averaging 15 reviewed merge requests per week
+Build features across Ripple’s customer data platform, including SDK integration, event definitions, the Go ingestion gateway, and Kafka routing
+Led Daberna, a real-time multiplayer game that reached 400K peak WebSocket connections with sub-100ms p50 latency and 99.9% availability across 110 live episodes
+Improved production p75 LCP from 4.2s to under 3s and INP from 800ms to 300ms through Workbox and responsive-image work
+Reduced production build time from 200s to under 40s and cold development start-up from 60s to 7s for a 15-engineer team
+Designed a same-origin micro-frontend architecture across 10+ services, enabling independent Kubernetes deployments

Featured work

A few things I've shipped

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ai nestjs postgresql redis fsrs kubernetes

Vocabify

July 1, 2026

An AI-assisted vocabulary-learning product with structured card generation and an opinionated FSRS learning experience.

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ai developer-tools gitlab-ci golang postgresql kubernetes

MergeScout

June 1, 2026

An advisory AI code-review agent for GitLab CI, built to find high-signal issues before merge while keeping humans in control.

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portfolio tanstack-start kubernetes

HossInCode

January 1, 2026

A bilingual English and Persian portfolio and technical blog built for maximum SEO and performance on Kubernetes.

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real-time websockets concurrency performance redis kubernetes

Daberna

January 1, 2023

A real-time multiplayer game for Tapsi that reached 400K peak WebSocket connections during live episodes.

View case study

Writing

From the blog

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A Type-Safe Content Pipeline with Zod and Content Collections

2 min read760

Available for new opportunities

Have an interesting problem? Let's talk.

I'm currently open to Senior Software Engineer roles and impactful engineering initiatives, especially in backend systems, developer platforms, applied AI, and data infrastructure.

Email me Download résumé