Razvan – Golang, PHP, Solidity

The platform reveals the Influencers who have already bought from stores. To better understand the relationship with a specific customer, each has a profile where you can see their history and some basic stats (orders, average order value, total revenue, etc.). It enables the shop owner or marketing director to contact the influencers for collaboration purposes directly. The app automates the discount code generation with different options, depending on the use case, and presets for multiple approaches. It also emphasizes their power in social media by showing their stats (engagement rate, reach, estimated fees, etc.).

• Led internal team and external team who worked with another legacy app;
• Built the architecture of the entire application;
• Developed dashboard service (Symfony + MySQL + Redis);
• Developed discovery microservice (Go + MySQL + Redis);
• Setup Docker local environment for development;
• Setup deployment procedure;
• Developed a distributed synchronization solution for parallel computing of multiple data streams;
• Delivered continuous improvement of parallelism and concurrent data processing;
• Researched and implemented proxy rotating solutions taking care of costs, reliability, and performance;
• Researched and implemented clustering solutions for Instagram profiles location approximation;
• Implemented a scoring mechanism for the proper match between a customer and social media account and tweaking for removing false-positive matches;
• Managed Shopify integration (data import, discount code generator, etc.);
• Managed reverse engineering Instagram API;
• Delivered sentry integration for monitoring and alerts;
• Investigated questions for client interviews;
• Found features for Product-Market Fit.

It is a Web3 "fit to earn" lifestyle ecosystem that delivers an online concept through a semi-decentralized app, which includes fitness, nutrition, personal development, and mindfulness, that will further develop in a hybrid concept with offline sports events, boot camps, and competitions. It is built on the Elrond blockchain with game-fi elements that have the goal of helping people to become better versions of themselves and get rewarded while achieving their goals.

• Developed staking contract;
• Developed vesting contract;
• Managed to develop NFT and fragmented NFT for Gyms;
• Created blockchain architecture and shared knowledge with teammates.

In the fast-evolving world of digital currencies, the ability to accept multiple cryptocurrencies has become increasingly important. To address this need, Razvan has created a minimal yet effective solution that enables viewers of live streamers to donate using various cryptocurrencies.

• Developed front-end (Bootstrap + web3.js + Wallet connect);
• Researched and developed solutions for OBS integration like real-time data sending (WebSockets);
• Researched and developed solutions for blockchain integration;
• Created Ethereum/Polygon/BSC on-chain data store + off-chain local data;
• Setup deployment.

It is a front-running bot for decentralized exchanges (Pancakeswap, Uniswap), which gets the pending transactions from a low-latency node, and signing and submits a new transaction with a higher tx fee, therefore getting prioritized. It benefits from getting a better rate for trading some coins based on volatility, liquidity pool size, and other aspects.

• Researched and reversed engineering blockchain for better understanding;
• Developed a simple solution for frontrunning other wallets;
• Re-iterating for optimizations and higher reliability;
• Integrated with a low-latency node to watch the mempool for pending transactions.

It is one of the largest e-commerce platforms in Eastern Europe. The main AI recommender system was processing vast amounts of data triggered by various customer events on the platform's website, such as adding or removing products from their cart or wishlist.

• Rewrote Python consumers to Go;
• Redesigned the pipeline;
• Maintained API documentation in Swagger;
• Participated in code reviews and contributes to the overall code health;
• Worked using multithread programming;
• Used Neo4J for graph database;
• Developed using event-driven design.

It is an analytics platform for Social Media. The primary differentiator is the ability to track campaigns, therefore having stats to conclude about the quality of the influencer's audience, return on investment, etc. The most important idea was the ability to track each post's statistics (engagement, reach, etc.) and also e-commerce URL tracking (sales, clicks). The main features are a real-time analytics system, public-sharing for collaborations, a co-working system, ROI tracking, etc.

• Developed platform (Symfony + PHP + MySQL + Redis);
• Setup Docker local environment for development;
• Helped in creating a strategy for SaaS marketing;
• Managed clients interviews;
• Helped in competitor analysis;
• Did a Facebook and Instagram API integration.

It is a business intelligence application for stores, highlighting insights about the most valuable customers and actions that must be taken. Explore is a CRO (conversion rate optimization) platform. It allows the creation of different variations of the website serving them to multiple segmentation of visitors (A/B testing, advanced segmentation, etc.).

• Developed the Dashboard app;
• Created the core microservice for data processing;
• Researched for concurrent and parallel processing;
• Researched and prepared Clickhouse environment, mainly for sharding and replication, because of high RPS;
• Developed ETL (MySQL -> Clickhouse);
• Rewrote queries (MySQL -> Clickhouse);
• Optimized queries and microservice for big data.

I played a key role in developing the pioneering first Ethereum Liquid Staking protocol incorporating Distributed Validator Technology (DVT) to enhance resilience, self-healing, and redundancy. My duties encompassed the development of DVT, exploration of Merkle trees for EVM validator data (related to EIP-4788), utilization of libp2p for Diva network communication, implementation of BLS secret keys splitting through Shamir Secret Sharing, and the application of actor model concurrency. Proficient in GRPC servers, smart contract integration, and advanced blockchain event monitoring, I also made significant contributions to consensus algorithm research and implementation within the Nektar network. Additionally, I possess expertise in slashing protection and considerations related to epoch finality.

developing Diva protocol (P2P network, DHT, gossipsub) developing Distributed Validator Creation developing Distributed Validator Signing mechanism developing safety mechanisms (slashing protection) debugging Ethereum validators behaviour