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Daniel Lytvyn Address: Cherkasy, UA | Date of birth: 08-11-2001 | Phone [open contact info](look above in the "contact info" section)
Full-stack Software Developer LinkedIn: daniilly | Email: [open contact info](look above in the "contact info" section) | GitHub profile: github.com/lytvynda

Full-stack developer, 4 years, backend focus. Shipped across ERP, edtech, real estate, live streaming, and AI
platforms - greenfield MVPs to legacy revival. Background in applied physics.

Experience

ProtoQ | Full-stack developer Cherkasy, UA | Mar 2025 - Apr 2026

Contract role across three Node.js products (construction ERP, real-estate due-diligence, AI ad-generation).
Teams of 2–6 engineers; owned features end-to-end with independent architectural calls. Scoped incoming
initiatives with WBS and estimates; mentored two juniors.

Real-estate due-diligence platform

● Cut a critical dashboard query from 3.5s to 60ms.
● Migrated tenants from a shared S3 bucket to per-tenant buckets with automated provisioning —
compliance-driven, zero downtime.
● Designed a filtering protocol shared between backend declarations and the frontend table,
eliminating a recurring class of contract drift.
● Bootstrapped a NestJS microservice for protected-document access; set up New Relic alerting.

WhatsApp + web RAG chatbot

● Owned ingestion and retrieval quality; implemented weighted retrieval.
● Drove Meta Business verification end-to-end.
● Stood up a self-hosted n8n instance now used team-wide.

Construction-site ERP — scheduling

● Sole owner of the scheduling story inside a large Angular Nx monorepo.
● Owned scheduling architecture inside a large Angular Nx monorepo; integrated a third-party
scheduling system across multiple ERP modules with isolated datasource and caching logic.
● Reduced redundant API traffic by redesigning the request batching layer for parallel fetches.
● Shipped image categorization across a federated GraphQL gateway.

AI ad-generation platform

● Split a single firehose RabbitMQ queue into per-purpose queues.
● Added endpoint-level caching; cleared a backlog of cross-pipeline bugs.

InterLink | Full-stack developer Cherkasy, UA | Nov 2022 - Feb 2025

Four projects across backend infrastructure, video streaming, and edtech. Scoped new initiatives with WBS and
estimates. Delivered public technical talks on RxJS and modular application architecture.

Virtual labs launcher (solo revival)

● Educational platform provisioning per-student containerized lab environments from
teacher-supplied Docker images. Built by a 3–4 engineer team, then shelved — brought back to
life solo.
● Migrated from cloud Docker Swarm on GCP to on-prem Kubernetes across 4 client clusters.
● Replaced large Ansible/Terraform modules with a Heroku-style deploy script.

● Cut provisioning time by 98%; saved up to ~$3,000/month per cluster.

API generation tool (legacy revival)

● Platform exposing dozens of heterogeneous backends (DBMSs, email, file systems, git, etc.)
behind one standardized API layer. Parked long enough that Laravel 6, drivers, and most
dependencies were end-of-life.
● Led the upgrade to Laravel 9: picked compatible drivers, debugged each service to green,
cleaned out deprecated dependencies project-wide.
● Rebuilt a legacy test infrastructure into Jest with 1,000+ test cases and modular execution per
service, significantly improving contributor workflow.

24/7 live streaming platform (MVP)

● Built a platform letting creators maintain persistent simultaneous streams to YouTube, Twitch,
and Facebook. Stack: Angular, Spring Boot, ffmpeg.
● The core problem was stream survival: graceful handling of platform disruptions, reconnection,
automatic continuation across edge cases.
● First paying users within 3 months; ~50 creators onboarded at launch.

Multi-tenant OpenEdX fork (migration)

● Helped migrate a multi-tenant OpenEdX deployment — hundreds of active students, full service
stack and databases — from GCP to an on-prem Kubernetes cluster.
● Coordinated downtime windows with clients and sequenced the cutover with DevOps so
learners weren't disrupted.

Internship | Full-stack developer Cherkasy, UA | Jul 2022 - Nov 2022

Selected as 1 of 4 hires from 100+ applicants; offered a full-time role at the end of the program. Built a React.js
task tracker and integrated it into the company's HR platform via microfrontend architecture.

Education

Bohdan Khmelnytsky National University | Bachelor’s coursework in Applied physics and nanomaterials
Cherkasy, UA | 2019 - 2022

Bachelor’s coursework in Applied Physics and Nanomaterials. Three years of physics, advanced mathematics,
and computational modeling, including physics simulations built in Delphi and Pascal.

Skills

● Primary: TypeScript, Node.js, NestJS, PostgreSQL, Angular, Docker, Kubernetes.
● Also experienced with: GraphQL, Nx, Python/Django, PHP/Laravel, Spring Boot, Ruby on Rails, React,
Vue, ffmpeg, RAG/vector DBs, n8n.
● Infrastructure & Messaging: RabbitMQ, Redis, Terraform, Ansible, AWS, GCP, Linux, DNS.
● Languages: English (professional), Ukrainian & Russian (native).

Interests

Weightlifting, calisthenics, cooking, neovim tinkering, and a side project building a custom ERP for a local
business.