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Jakub Pogorzelski

@jakubpogorzelski

Message

Senior full-stack Web3 engineer building scalable, cross-chain applications with TypeScript.

Poland

Message

What I'm looking for

I’m looking to build high-throughput Web3 and full-stack systems with a focus on security, performance, and developer experience—leveraging TypeScript, React/Next.js, SDKs, cross-chain execution, and strong observability to ship reliably.

I’m a senior software engineer with 10+ years of experience designing scalable distributed systems, high-performance frontend platforms, and blockchain-integrated applications across fintech and Web3 ecosystems. I focus on performance, security, and developer experience when bridging traditional backend systems with decentralized infrastructure.

I build cross-chain decentralized applications, SDK architectures, and real-time transaction systems using modern TypeScript-based stacks including React, Next.js, and state-driven orchestration frameworks like XState. In production, I’ve engineered multi-chain transaction flows with sub-second UI responsiveness and deep observability to debug cross-chain states and bottlenecks in real time.

From NEAR Protocol intent systems and secure enclave computation to MPC-based signing workflows, I deliver production-grade, reusable modules that external DApps can integrate. I also ship full-stack platform capabilities end-to-end—across APIs, state machines, databases, and cloud-native deployments—backed by CI/CD, testing, and secure API design.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Speednet

Aug 2021 - Present (4 years 7 months)

Engineered a high-throughput decentralized frontend platform with sub-second UI responsiveness across EVM and non-EVM networks. Built cross-chain intent execution layers and a production-grade NEAR SDK, and implemented XState-based RFQ state machines plus MPC signing workflows to improve determinism and reduce edge-case transaction failures.

React Next.js TypeScript XState NEAR Protocol SDK State Machine Flow

Full Stack Engineer

Cronn GmbH

Mar 2018 - Jul 2021 (3 years 4 months)

Designed AI-powered recommendation engines for enterprise dashboards and built anomaly detection systems for financial transaction monitoring to strengthen fraud identification workflows. Developed multi-tenant backend services in Node.js and Python with AWS/Docker deployments and CI/CD pipelines, integrating NLP-based automation into React interfaces.

Node Python Microservices AWS Docker CI CD Machine Learning Anomaly Detection NLP React

Full Stack Developer

Execon ITS

Aug 2016 - Feb 2018 (1 year 6 months)

Built responsive React and TypeScript web applications using modular UI components and reusable design systems. Developed Node.js/Express REST APIs, implemented JWT/OAuth2 authentication for multi-user platforms, optimized MySQL queries for performance, and delivered features end-to-end from requirements to deployment.

React TypeScript Node Express REST APIs JWT OAUTH2 MySQL Design Systems

Junior Software Developer

Eo Networks

Mar 2015 - Jul 2016 (1 year 4 months)

Developed early-stage frontend UI components for internal business applications, improving usability and accessibility. Supported frontend-to-backend integration with REST APIs and improved UI consistency through reusable styling patterns.

HTML CSS JavaScript Frontend REST APIs Usability Accessibility Reusable Styling Patterns