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dz.

Product EngineerMunich

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Dzmitry Zubakin.

I build web and mobile products at Tools for Humanity, from the interface to the systems behind it.

LLM apps & agent workflows

I also build LLM applications and agentic systems, with Claude Code and Codex as part of my development workflow.

MCP · Tool calling · RAG · Structured outputs

AI & agents

Experience

  1. Senior Software Engineer

    Oct 2023 — now

    I build user-facing features for the Operator and Enterprise apps, including device management, onboarding and account workflows.

    Key-page LCP improved from ~5.5s to 2.1s.

    Device management

    I build the flows operators use to order and set up devices. I work with the Orb Software team on the app side of features such as Network Center.

    Enterprise workflows

    Onboarding, account linking and user-management interfaces that reflect each person’s role. I also work on Zoom integration, audit logs and the notification delivery system.

    Orb on Demand

    A feature for booking a verification visit. I built the frontend and serverless backend on AWS, including booking and calls between users and operators without sharing personal phone numbers.

    Application architecture

    I work with backend-for-frontend (BFF) APIs shaped around the client’s needs, and server-driven UI (SDUI), where the backend defines how screens are composed.

    In production

    Real-user monitoring helped me find and fix loading bottlenecks. I added Datadog logging for Next.js services and PostHog analytics, and investigate incidents as part of the on-call rotation.

    Since October 2023

    I started on these products through Ottofeller in October 2023 and joined Tools for Humanity directly in October 2024.

  2. El Pixel

    May — Oct 2023

    Full Stack Developer

    I worked on a tire store’s React storefront and serverless backend, including catalog imports and data exports.

  3. Godel Technologies Europe

    Nov 2022 — May 2023

    Software Engineer

    I worked on operational dashboards and reporting, improving large-table rendering with virtualization.

  4. Sourcemates

    Jun 2020 — Nov 2022

    Software Developer

    I built web and mobile features for client projects, including e-commerce and payment integrations.

Tools I use

Interfaces
TypeScriptReactNext.jsReact NativeTanStack Query
Backend
Node.jsHonotRPCGraphQLPostgreSQL
Infrastructure
AWSDockerGitHub Actions
UI & quality
Tailwind CSSFramer MotionStorybookVitest

AI & agents

LLM apps
Application development with Claude, GPT, and open-weight models.
Agents
Agentic systems and multi-agent orchestration, built around a context → action → verify loop.
Integration
Model Context Protocol (MCP), tool and function calling, and structured outputs.
Context
RAG, prompt engineering, and context management.
Workflow
Claude Code and Codex for implementation, refactoring, and review.

Away from the IDE

Selected city: Vitebsk

I have a soft spot for Italy and Scotland. I love taking photos with my Sony α7 III, and I’m interested in history, philosophy, and Botticelli’s paintings.

Contact