Oleg Repin Email & Phone Number

Limassol, Cyprus

Duties:- developing, testing, and managing the implementation of the online advertising management system. Programming languages, technologies, and tools used include but are not limited to TypeScript, Go, NestJS, React, GKE, GCP, Terraform- drafting specifications and internal documentation for various components of the advertising management system- establishing and upkeeping development, test, and production environments, while ensuring seamless continuous integration and delivery for different parts of the advertising management system- investigating appropriate software stacks to fulfill specific project requirements- enhancing and preserving the functionality of current software for advertising management system- offering guidance and recommendations on software architectural design- offering expertise and suggestions regarding software security measures- establishing monitoring systems and alerts for both software performance and business metrics- conducting thorough security assessments of the softwareProject: AI-powered marketing platform for SME and digital agencies, a team of 5 (https://theadtools.com/)Accomplishments:- being a technical leader in a small group I’ve been working as a cloud and software architect, a software reliability engineer (SRE), a software engineering manager (SEM), and a full-stack developer- created skeletons of back-end and front-end parts of the system from scratch at the start- set up developing, staging, and production environments with continuous integration and continuous delivery- hired a development team, led the process of development, introduced DevOps practices, mentored newcomers

London Area, United Kingdom

Duties:- designing, developing, and testing new and existing parts of the analytics platform according to the provided business requirements- modifying and improving existing parts of the analytics platform- creating automated unit, integration, and load tests for core functionality- researching technical solutions to meet the requirements- setting up and maintaining development, testing, and production environments for the new parts along with continuous integration and delivery- setting up monitoring and alerting for the software and business metrics- developing reusable tools, packages, and libraries for internal use- improving the security of the analytics platform and mitigating security risksProject: Real-time events handling system, single developerAccomplishments:- built the entire system from scratch along with an infra and ci/cd process- with small resources the system handles 40M+ daily events (in peak ~1k RPS) and can be autoscaled x10 times- covered with unit-, integration-, and load-tests- implemented the first Go project in the company, made reusable internal libs for other Go projectsTechnologies: Go, Terraform, Kubernetes, Docker, PostgreSQL, InfluxDB, Prometheus, BigQuery, GraphQL, ProtobufProject: Monitoring UI for internal ETL platform, a team of 2 (me and CTO)Accomplishments:- implemented both frontend and backend- increased performance of several SQL queriesTechnologies: TypeScript, Node.js, NestJS, ExpressJS, TypeORM, React, GraphQL, PostgreSQL, Argo, KubernetesProject: API integrations with 3rd party ad platforms, a team of 4 (https://segmentstream.com/integrations)Accomplishments:- implemented API integrations with such platforms as Google Ads, Twitter, and TikTok, built the whole ETL cycle for it- extended legacy integration system to implement various OAuth versionsTechnologies: JavaScript, Node.js, Koa, Sequelize, React, PostgreSQL, Argo

Duties:- collaborate with the teams of analytics, design, exploitation, and testing to define requirements for the development of a new mobile banking application- research and introduce emerging technologies to align with business requirements- formulate and architect the development process and overall system architecture for the mobile banking application using React-Native as a core technology- implement and customize internal corporate standards of development and testing to align with the technological stack adopted for the project- adapt and implement existing internal libraries to ensure compatibility with the company’s ecosystem- establish development, testing, and production environments to support the software development life cycle- configure and optimize existing continuous integration and delivery processes to seamlessly integrate with the new technologies utilized- provide mentorship and guidance to fellow developers within the team, covering aspects of new technologies, usage patterns, best practices, and limitations- prioritize and address security and performance considerations in the design and implementation of the mobile banking applicationProject: Bank for legal entities, a team of 14 (https://apps.apple.com/ru/app/юbusiness/id1536934849, https://play.google.com/store/apps/details?id=ru.yoo.business&hl=ru&gl=US)Accomplishments:- successfully introduced react-native technology (for both platforms: iOS and Android) into the tech giant’s development cycle, taught the team how to work with react-native, how to keep top-notch 60fps UI performance- bootstrapped banking app’s core with navigation, integration tests, custom UI lib, and required native libs integration within a couple of months, set up CI/CD process for mobile app- also participated in the browser UI development and worked on the backend-for-frontend (BFF)Technologies: Typescript, React-Native, Node.js, NestJS

London Area, United Kingdom

Duties:- designing and coding web and mobile applications tailored for online banking using next technologies: React-Native, React, Node.js, TypeScript, etc- configuring and establishing test environments dedicated to mobile applications to ensure robust testing procedures using next technologies: TestFlight, Bitrise, Fastlane- analyzing business metrics, performance logs, and other relevant data to offer recommendations for enhancements, generating reports, and managing incidents within the software engineering context- executing continuous integration and continuous delivery practices specifically for mobile applications- managing the preparation of application releases for deployment on platforms such as AppStore and Google Play- conducting thorough code reviews and providing mentorship to fellow developers in the team, offering expert guidance on solutions that address performance and security requirementsProject: Mobile bank for individuals, a team of 12Accomplishments:- built several core mobile UI features such as transactions’ history and details, chats, installment plans, settings, etc. A lot of complex UI animations using the native driver for 60fps- created an internal Go CLI email templating tool that uses reflection and codegenTechnologies: Typescript, Go, React-Native, Node.js

Duties:- leading and actively participating in the development of both new and existing components of an affiliate marketing platform- collaborating with the Site Reliability Engineering (SRE) team to implement DevOps practices such as continuous integration, continuous delivery, monitoring, alerting, etc.- conducting interviews and providing mentorship to new developers within the team- handling and addressing security issues and incidents within the production environmentProject: Affiliate program, a team of 8 (https://affiliate.iqoption.com/)Accomplishments:- taught the frontend team to work with the backend and made a transition to a self-depended full-stack team, that significantly increased the velocity of new features deployment- built API gateway that allowed the project to be split into microservices- designed and implemented splitting of core service to microservices, which increased stability, maintainability, and velocity of feature deployment of the whole system including the second dev team of this project- built several new critical Go and Node.js microservices, some of them with 3rd party compliance integrations, one of them saved the product from being shut down due to a new financial regulation policy- in one week bootstrapped a mobile app for affiliate managers that allowed communication and affiliates’ management on the go- introduced such technologies as React, Redux, and GraphQL, conducted internal meet-ups on these technologies, consulted colleagues from other departments on choosing the right tech stack for their casesTechnologies: Go, TypeScript, PHP, Node.js, React, React-Native, GraphQL, PostgreSQL, Redis, RabbitMQ, DockerProject: stocks trading app prototype RnD, a team of 6Accomplishments:- implemented billing sandbox backend- built stocks portfolio UI for mobile appTechnologies: TypeScript, React-Native, Node.js, MongoDB, Redis, GraphQLIn November 2018 I moved to a new project with the founder of current company.