shapkarin

Staff Level Full Stack Engineer

I’m a Staff-Level Full-Stack Engineer with 10+ years in production development across ML/AI, biotech, fintech, edtech, Web3 and distributed systems. I build end-to-end solutions from architecture and implementation to performance, security and CI/CD. I was working also on telecom and DRM video-straming, ML projects in marketing and previously in biotech. I prioritize system integrity and software supply chain security, actively employing tools like Docker, LavaMoat, StepSecurity and Socket.dev, plus pnpm security features. Those tools help to harden CI/CD pipelines and local development. I know Go lang, Node.js (NestJs, Prisma, Express, Koa), Redis and React (Next.js, react-router, redux, zustand and jotai). I used MQ: BullMQ and RabbitMQ. Wonder to try Kafka in production. Alongside hands-on engineering, I bring technical leadership, mentoring teams on secure development practices for the blockchain and fintech sectors. 





Key Achievements
1. Architect, integration, and profiling of the MCP server that any agent can understand and AI-chat under the hood using SSE and custom (safe!) router for LLM providers.
2. Led end-to-end development of a multi-chain non-custodial launchpad (EVM + Solana), implementing deterministic token issuance flows.
3. I won this Meteora tiny bounty https://x.com/meteoraag/status/2029467320775766297 (and several other bounties)
4. Architected a unified wallet abstraction layer across MetaMask, WalletConnect, Phantom, and Solflare, ensuring seamless cross-language interactions and cross-ecosystem signing flows.
5. Designed and implemented robust CI/CD pipelines achieving a 4x delivery improvement while maintaining strict security gates for wallet-related deployments. GithubAction, Docker, AWS (mostly EC2, RDS and S3 with CDN), CDK and Oracle with Terraform.
6. Built a non-custodial browser extension and web wallet for the BitSong blockchain from scratch, featuring secure key handling and mnemonic generation.
7. Integrated advanced supply-chain protection (LavaMoat, pnpm permission controls) to harden build pipelines against dependency attacks, critical for financial software. Used also StepSecurity and Socket.dev GitHub Actions and APIs for the analysis and warnings to prevent various attacks.
8. Led multiple projects and teams simultaneously, handling both technical side and team management.
9. Added DRM for video streaming, UI and integrated partners API.
10. Delivered meaningful improvements to products and workflow.






Experience: 11 years

Yearly salary: $106,000

Hourly rate: $65

Nationality: 🇰🇿 Kazakhstan

Residency: 🇩🇪 Germany


Experience

Staff Software Engineer
SideQuest Meta LTD
2024 - 2026
• Leading several cross-functional teams • PRDs, sprint planning, code reviews, architect with C4 • Led full-stack development across two SocialFi products and two teams: a multi-chain non-custodial launchpad and mass-adoption Web2.5 platform. • Designed and developed a multi-chain SocialFi launchpad (EVM, opBNB, Solana) with token issuance flows and non-custodial Web3 auth and interactions. • Built a Web2-oriented SocialFi product with custodial wallet integration and rich backend workflows. • Architected scalable frontend systems for high iteration speed. • Integrated MetaMask, WalletConnect, Phantom, Solflare with unified safe interaction patterns. Including auth with non-custodial wallets to use custom private API using SIWE • Implement CI/CD delivery speed which increases delivery by 4× through GitHub Actions, Docker and AWS. • Implemented supply-chain protection using LavaMoat and pnpm permission controls. • Mentored engineers and guided architectural decisions.
Senior Software Engineer
evmOS
2023 - 2023
Integrated multiple wallets auth including MetaMask, Keplr and Walletconnect. Implemented staking, IBC transfers, DAO interactions with pretty UI. Improved UX, stability and rendering efficiency across complex components. High-performance dApp. Contributing to the Go backend. dApp web archive historical snapshot link upon request. The project currently operates within the Ethereum ecosystem and remains active, including its DAO.
Senior Full-Stack Engineer
Non-web3
2022 - 2023
• Built full-stack features using Node.js, Koa, Express, PostgreSQL and React. • Designed backend endpoints and optimized data-access patterns. • DRM usage. • Two projects for famous major companies.
Software Engineer
xora
2020 - 2021
• Developed a non-custodial browser extension and web crypto wallet from scratch with secure key handling for the BitSong blockchain. • Built staking, IBC transfers, and client-side transaction construction. Built a copy-trading MVP (Swap Tok) integrating CEX and DEX execution with deterministic order state machines.
Senior Full-Stack Engineer
Avallain
2020 - 2021
Big EdTech Swiss company Developed cross-platform mobile using Qt/QML and React Native. Maintained enterprise-level frontend systems with strict security requirements.
Senior Front-End Developer
æternity blockchain
2017 - 2020
Core developer on Superhero Wallet, a multi-chain non-custodial wallet supporting AE, ETH, and BTC. Built the Superhero SocialFi dApp platform with wallet-authenticated interactions. Created superhero-utils SDK for third-party integration.

Skills

ci-cd
cosmos
docker
ethereum
golang
solana
full-stack
english
polish