Victor Panteleev

Hilversum, Netherlands

Victor Panteleev

Freelance Senior Full Stack Engineer

I build reliable software and make technical work easier to reason about.

I help teams build reliable web applications, APIs and platform features with TypeScript, React, Next.js, Node.js, NestJS and PostgreSQL.

I enjoy working on complex products where quality, scalability, performance and maintainability matter. My experience spans e-commerce, healthcare platforms, SaaS/MVP development and AI-powered products, with a strong focus on clear API contracts, pragmatic architecture and good team collaboration.

View experienceContact me

Selected experience

Senior delivery in product environments where correctness matters.

A condensed view of the roles that best explain the work I can do for clients now.

2022-2024

Talpa eCommerce

Freelance Software Engineer & Team Captain

Worked on auction platforms including vakantieveilingen.nl and slajeslag.nl, serving 3M+ registered users and 5-8k concurrent users during peak hours.

Next.jsNestJSRedisMicroservicesJest
  • Built features where frontend performance and gateway stability were critical.
  • Championed a 6 month long strict typing migration in the NestJS gateway.
  • Coordinated API changes, debugging and gateway behavior across teams.

2017-2020

Ksyos

Full Stack Engineer

Worked on a virtual hospital platform connecting primary care professionals with specialists across a React, Express and PostgreSQL platform.

ReactNode.jsExpressPostgreSQLHealthcare
  • Built software in a privacy- and reliability-critical healthcare setting.
  • Connected service desk and tech workflows for reports and requests.
  • Trained 40+ colleagues and regularly presented sprint demo work.

2024-2025

Odafuro

Co-founder & Full Stack Engineer

Co-founded and built an MVP restaurant management system with a backoffice, floor plan builder, menu builder and mobile app prototype.

Next.jstRPCDrizzleSupabaseRedisReact Native
  • Built a Turborepo monorepo with shared packages and type-safe APIs.
  • Created a performant custom floor plan builder with complex state.
  • Moved caching and revalidation from Server Actions to tRPC and Redis.

2026-present

Rogue Chat

Founder & Full Stack Engineer

Building a WhatsApp-based AI assistant that lets users interact with OpenAI models from the chat app they already use.

Next.jsAWS SQSLambdaOpenAI APIWhatsApp Business Platform
  • Separated WhatsApp webhook handling from AI processing.
  • Queued messages through SQS and processed them with AWS Lambda.
  • Integrated OpenAI models into a WhatsApp-based assistant product.

Services

What I can help with

A more detailed version of the service list above, grouped into the practical outcomes clients usually need.

01

Product Engineering

Full stack delivery for teams building reliable product features

I can take a feature from product discussion to typed APIs, polished React UI, production rollout and follow-up improvements.

02

API & Backend Work

Gateway layers and backend workflows with clear contracts

I work comfortably with NestJS, Express, Next.js route handlers, queues, serverless processing and pragmatic service boundaries.

03

Quality & Direction

Code quality, mentoring, reviews and technical direction

That can mean strict TypeScript migrations, better test coverage, safer data flow, clearer abstractions and more useful reviews.

04

Data & Platform

Data modelling and platform work with PostgreSQL and AWS

I help teams shape database models, performance-sensitive paths, S3/CloudFront flows, SQS/Lambda jobs and observability.

Projects

Selected projects and contributions

Rogue Chat

A WhatsApp-based AI assistant that lets users interact with OpenAI models from WhatsApp.

  • WhatsApp webhooks
  • Queue-based processing
  • OpenAI API integration
  • AWS Lambda/SQS
  • Product/company ownership
View project

Custom Webshop / Voinik

An experimental Shopify-like webshop and backoffice with a server-rendered storefront.

  • Storefront and protected backoffice
  • Product/category management
  • S3 signed uploads
  • CloudFront image delivery
  • Admin workflows designed behind login
View project

Open source & security

Contributions, packages and reports across Auth.js, Kysely/libSQL and next-redux-wrapper.

  • Reported and contributed to an Auth.js Redis adapter vulnerability fix
  • Merged next-redux-wrapper hydration fixes for Next.js Pages Router apps
  • Published a Kysely dialect for libSQL
  • Active Stack Overflow participation before AI tools changed developer support

Stack

Tools I reach for most often

I use Neovim and AI-assisted development tools like Codex and T3 Code, while keeping code review, architecture and delivery decisions firmly human-owned. The map below shows the frontend, backend, testing and infrastructure tools I use most often.

Visual map of Victor's core stack supported by frontend, backend, testing and infrastructure tools.

Education & languages

Academic background and communication

Education

  • MSc Medical Informatics, University of Amsterdam
  • BSc Biomedical Sciences, University of Amsterdam

Languages

  • Dutch native
  • Bulgarian fluent
  • English professional fluency
  • Japanese elementary

Contact

Let's talk.

Available for freelance senior TypeScript full stack and backend roles. Hybrid in the Amsterdam/Utrecht area, remote during Dutch working hours.

Email Victor
Availability: Freelance
me@victorpanteleev.com+31 6 3985 6395Hilversum, Netherlands
LinkedInGitHubStack Overflow

KVK: 78088151

VAT ID: NL003285342B20