Apr 2022 – Nov 2022 · 7 mos · Remote

• Technologies:
• Solidity, Cairo, Node.js, Starknet, Hardhat, ethers.js, Waffle, OpenZeppelin (Solidity & Cairo contracts)
• Built a staking smart contract solution for $TEMP token holders. After that I pivoted to helping my team build the Nostra money market on Starknet, using Cairo.

Aug 2021 – Mar 2022 · 7 mos

• Technologies:
• Solidity, Node.js, web3.js, ethers.js, Truffle, Hardhat, Infura, Fireblocks
• I was the first engineer in a completely new team working by myself. Built integrations with big Ethereum DeFi projects like Maker and Curve.

Jan 2021 – Mar 2022 · 1 yr 2 mos

• Technologies & Areas: Java 11, Spring Boot, React, Redux, TypeScript, Node.js, PostgreSQL, Redis, DynamoDB, Kafka, Docker, Kubernetes, Helm, AWS, Jenkins, WebSockets, Fireblocks, crypto exchanges (Binance, Huobi, Kraken, Bitfinex etc) integration
• My team and I built the Nexo Exchange and Nexo Prime software products from scratch and I took part in most major features development. I owned my DevOps and testing, mentored junior colleagues and led initiatives. Was in charge of a team of three people, one of them working remotely, for a quarter and accomplished best team performance for that particular quarter.
• Notable features built/contributed to:
• Liquidations engine for loans
• TWAP execution
• Smart Order Routing
• Assets rebalancer for our blockchain wallets infrastructure
• Boosters (retail margin trading)
• Triangulated pairs execution
• Market making
• Integration with various exhanges (Bitfinex, Binance etc)

Nov 2019 – Dec 2020 · 1 yr 1 mo · Sofia City, Bulgaria

• Team: vRealize Automation SaaS - a cloud-agnostic tool for declarative-based cloud resources provisioning
• Technologies & Areas: Java 8 & 11, Xenon, Spring, AWS, PostgreSQL, Liquibase, Bash, Docker, Kubernetes, Helm, Jenkins, JUnit, Mockito, Groovy, Git, Gerrit, REST API, CI/CD, testing (unit, integration, E2E), low level system design
• The software has a complex asynchronous architecture, designed following best cloud native practices - containers, microservices, automation-first approach, CI/CD, distributed tracing, timeout & retry mechanisms. I worked on the core services that integrate with cloud providers (AWS, Azure, GCP). Their CI/CD pipelines were very big, loaded with lots of unit, integration and API & UI E2E tests. The pipelines were owned by everyone in the team and I put a lot of time into supporting them aside from my feature development duties.
• Some things I am proud of are that I used entirely new for me technologies, tools and frameworks successfully (was up to the speed of a regular team member) in just a week. I always delivered features tested and on time, with ownership up to Production environment. I improved the way service mocking was done in testing which resulted in a major performance and simplicity boost. Managed to be the top bug resolver for 3 consecutive months in a very competitive team, optimized pipelines & cloud resources usage and also did a few knowledge sharing tech talks.

Jan 2019 – Oct 2019 · 9 mos · Sofia City, Bulgaria

• First team (two months): consulting an IoT company, product was solar panels
• Second team (eight months): consulting a fintech company, product was internal financial system
• Technologies & Areas: Java 8, Spring Boot, Amazon Cognito, Prometheus, Docker, WebSockets, JMeter, Jolokia, jvisualvm, ELK stack, Performance tuning & testing, Authentication & Authorization
• This was my first job building client-facing software. My biggest accomplishments were that I had code in production on the second week, I created performance testing suite and integrated AWS services with Java code.

Oct 2017 – Sep 2019 · 1 yr 11 mos · Sofia, Sofia City Province, Bulgaria

• I taught the practical courses of Programming Fundamentals, Object-oriented Programming and Data Structures & Algorithms to the younger students. I prepared classes, exercises, homework & exam tasks. The technology was C++, so there were a few interesting concepts like pointers and memory management.