Ethereum Blockchain Smart contracts developer

Lviv · $3000 · 6 years of experience · Upper Intermediate

Ethereum Smart Contracts developer starting from 2017. I use newest technologies and solutions for development, like Solidity, Truffle, web3, OpenZeppelin, ZeppelinOS (for upgradable smart contracts), Ganache, Remix, unit tests. I have enough experience in developing smart contracts on Ethereum blockchain. Mostly I was working on ICOs and custom ERC tokens. Also there were gambling projects - games on Blockchain. I also have 5+ years professional experience in iOS, MacOS, Android and cross-platform application development.

Blockchain, OpenZeppelin, Smart Contracts, Solidity, Truffle, ZeppelinOS, Git

1. CTO at ImpressoLabs 2. ICO projects for Impressolabs, Mercato, GDP 3. Blockchain Lead

I am looking for blockchain smart contracts vacancies. Interested in companies, projects, startups etc.


Senior Ruby Engineer

Lviv · $5000 · 5 years of experience · Upper Intermediate

Software engineer with out-of-the-box thinking. Self-motivated, result-oriented, team player as well as solo performer. Have commercial mentor experience.

Ruby, Ruby on Rails, SOLID, PostgreSQL, Scrum, Sidekiq, REST API, JavaScript, React, Git, RSpec, Redis, Capybara, Vue.js

Took part in development of almost all crucial products in my previous company, on different stages. Implemented authentication layer which was used across the whole company. During the last year was the top contributor to the company's product which was the main revenue generator. Zero tasks failed over the 3 years. Wrote database obfuscation tool on Golang, which was used across the company.

An ability to have real impact on product and technical decisions is very desired. Also considering the option of part-time consulting.


COO / Product management / Product owner

Kyiv, Lviv, Rovno · $2000 · 3 years of experience · Beginner/Elementary

PM/COO Продолжительность трудоустройства 1 мес. Implementation of the SCRUM methodology Performing the role of SCRUM master Implementing documenting of company products Implementation of process management in the company Team management (content manager, Designers, front-end developer, back-end developer, QA) Robots with internal customers (CEO, founder, CTO, support team lead, marketing management) Software Product Manager Продолжительность трудоустройства 1 г. 3 мес. Implementation of the SCRUM methodology Performing the role of SCRUM master Implementing documenting of company products Implementation of process management in the company Team management (content manager, Designers, front-end developer, back-end developer, QA) Robots with internal customers (CEO, founder, CTO, support team lead, marketing management) Свернуть Head of projects and programs in the field of material (non-material) production Продолжительность трудоустройства 9 мес. Conducting the project management process of the company Certification of the company to ISO 9001 standards Implementation and development of the company's web direction Analyst Продолжительность трудоустройства 7 мес. - Creating competitive analyzes - Project Management - Work with outsourcing companies Manager for organizational development Продолжительность трудоустройства 2 г. 6 мес. Organizational Development Specialist Продолжительность трудоустройства 1 г. Development of normative documentation (business processes, procedures, job descriptions), analytical processing of information, development and implementation of business processes, the formation of instructions, formation and implementation of KPI Свернуть

Product management, Project Management, Agile, Scrum, Jira, Business Analysis, CRM, Business development, Confluence, Google Analytics, Team management, User Experience, Kanban, MVP, Product research, Prototype, Waterfall, Operations Management, Product Development, Analytical Skills, COO, Delivery management

25 January

JavaScript Developer

Remote work, Ukraine · $1000 · More than 10 years of experience · Pre-Intermediate

angular.js (1!!!), vue, jquery, yui, extjs, dojo, d3 Phonegap/Cordova/Ionic nodejs, express.js mongodb, redis, arangodb, couchdb

AJAX, Angular.js, VUE, Bootstrap, JavaScript, jQuery, JSON, Linux, MVC, Node.js, XML, async, cordova/phonegap/ionic, D3, ExtJS, YUI, CSS3, Dojo, HTML5, jasmine.js, MongoDB, chai.js, mocha.js, phantom.js, PostgreSQL, Python

Читаю лекции про Node.js

Тяжелый проект, желательно с нуля или с горящими сроками. В команде или одиночная работа. По договору

24 January

Fullstack Developer, Lead, Architect 

Remote work, Ukraine · $5000 · 9 years of experience · Upper Intermediate

Available immediately! - - - If any of the points below gives you a PTSD attack, I can help you: - Every new feature breaks two old features; - Everything was fine until you released to production and the whole world felt apart; - There is just no room to add more meetings, but nothing can get done; - You spend great amount of time on sprint estimation but deadlines are still being missed; - Developers beg you for time for some "technical work" but no one is able to explain you what has to be done and how long it will take; - Two developers developed two features in parallel, and now they can't integrate them; - It feels like business and development speak on two different languages; - etc. Those are some of the real phrases I heard from the clients: - "Now we deliver once a week instead of once a quarter" - "Wtf, developers are happy to automate their tests?" - "QA persons finally have time to breath!" (that's a direct quote) - "We don't have to work on weekends anymore" If you want someone to completely take the burden of technical decisions off your shoulders, so you can focus on the business part, while the app is just magically delivered to production - here I am! I started to learn programming when I was 13, and 16 years later (9 of which is commercial experience) I can say I know a few things about how to deliver value to users in a *regular and reliable manner*. Along this way I've discovered and mastered several practices you have probably heard about, but never seen working well in a "real world setup", like tests automation which allows the team to deliver new features without breaking old ones, continuous delivery which makes deployments a routine, agile practices which give you the mythical flexibility, and so on. Contact me even if you're interested but still not sure - I'll try to answer any of your questions.

JavaScript, React, Cucumber, Selenium, CI/CD, TDD, PHP, Python, Ruby, Elixir, Mobx, Apollo GraphQL, Laravel, Django, Ruby on Rails, Redux, Jest, Cypress, TypeScript, Prisma, Hasura, Docker, Dokku, Agile, Kanban, Lean, Git, Linux, MySQL, PostgreSQL, OOP, Scrum, Redis, MongoDB, REST API, Jira

- Wrote an adapter from Dojo Toolkit to React, that enabled gradual migration of the project to React, without rewriting it from scratch, thus saving the startup at least 66K$ (the company was going to hire two extra Dojo Toolkit developers for 3000$/mo each, but after the migration we were able to continue without extra hiring for all 11 months which I've been working there); - In collaboration with an amazing Ops-guy developed an internal Jira plugin allowed management and QA to deploy an isolated environment for any given ticket with a click of a button in Jira, with no involvement from developers; - Helped a team at an enterprise-sized company (Mulesoft) to reduce their delivery cycle from a few months to a week and stop working overtime; - For the last two years my team has been functioning without a manager; - Along the way taught several developers how to *save* their time using tests automation, and how to leverage it to maintain sanity in codebases; - Taught programming 2 friends from scratch until they got real paid jobs; - Inspired few developers (according to the developers themselves) to push their boundaries and learn new languages or frameworks. - Built a network of like-minded fullstack developers (and I can bring them with myself).

It's critically important for me to have the ability of making decisions on development processes and technologies. Otherwise I will not be able to fully leverage my potential, and you will get just an extra pair of hands, while the main benefit from hiring me is to get an extra head. - - - Acceptable backend technology is some "regular scripting duo", e.g. PHP/Laravel, Python/Django or Ruby/RoR. It's unlikely that I'll be able to handle something on Java, Go, Scala, etc. Also Elixir is acceptable if you're planning some highload. It is also totally fine if you have a legacy project that should be resurrected - as far as it's written on one of the scripting languages described above. It's also fine if it has some custom "homemade" framework, but I'll ask to take a look on it first. Whatever it is at the end, under no circumstances I'll propose to "rewrite it from scratch", but instead will propose a strategy for gradual migration along with developing new features. Frontend is default for the current year: it's either React, or Vue, or Angular. Something exotic like Svelte is negotiable too, but then you probably don't need to read this text - just go ahead and contact me. And again, any legacy project can be resurrected. If you need mobile, it's either React Native or something even more lightweight, like Turbolinks. I unlikely will be able to handle an app that needs an extensive work with native mobile APIs or which has some extreme design tricks or animations. But I' fine with that if you have time to let me figure it out. The infrastructure is built on top of GitLab CI, Docker and Dokku. If we're talking about a legacy project, the existing infrastructure will be used on start and then upgraded gradually.

24 January

Product manager/ Product Owner

Kyiv, Lviv · $3000 · 7 years of experience · Advanced/Fluent

A product manager/product owner with 4 years of experience in IT product and devops services for the manufacturing and supply network industries. An adaptable, personable, and creative professional with strong analytical skills and the ability to align technological progress and long-term value creation. Areas of professional expertise: • Product development (Agile/Scrum) • Team leadership • Product roadmap creation • Requirement definition and management • Project management • Elicitation new opportunities and needs • Organization of internal development process • Teamwork and collaboration • Product release management

Product management, Project Management, Jira, Team management, Product Development, Communication Skills, Team Building, CRM, ERP, Agile / Scrum / Kanban, Waterfal, UI/UX, Product Backlog management, Java, PHP

- IT Digital Strategy development and implementation at FMCG industry from scratch - CRM, ERP, BMP development for production, supply chain, HR functions via Web/Mobile Software Solutions - Direct people lead: 2 PMs, 3 devs, 1 QA, 2 support KU’s, Cyber security leader, IT administrator and 6 BA/SME’s - Indirect leader of up to 5 remote Project teams - Simultaneous execution of multiple software development projects - Ensured on-time project deliverable's with required quality and with cost efficiency - Execution of the short-term and long-term product roadmaps - Set up and tailored SDLC and run ceremonies of SCRUM - Established Scrum teams from the scratch

Challenging and inspiring work environment to bring out The Best from the team and from myself: - a position with a high level of responsibility - ambitious scaled project - data-driven and goal-oriented approach

24 January

QA Lead

Lviv · $3500 · 5 years of experience · Upper Intermediate

• Requirement analysis • Writing testing documentation: Test plans/Test Cases/Test Design • Bugs tracking • Manual Testing (Functional testing, GUI, Regression, Cross-browser testing) • Communication with client • Work with Databases.

Test Documentation, Waterfall, Agile, Confluence, Jira, Manual Testing (QA), Product management, Quality Assurance (QA), reporting, Requirements analysis, Scrum, Test planning & estimations, User Experience (UX), User Interface (UI), English, Project Management, Automated Testing (QA)

• QA Lead on a few projects at once • Development of all testing artifacts on the projects • Mentoring and coordination of team members • Successful settlement and improvement of QA processes

I’m interested in new experience, possibility to use in practice new technologies. I am looking for QA Lead role on Agile(SCRUM) project. Prefer close collaboration with customers with possibility to tailor QA processes and implement best QA practices.

24 January

Developer / Lead / Architect

Kyiv, Lviv, EMEA · $8500 · More than 10 years of experience · Advanced/Fluent

Sasha has 11+ years of software development experience and 2+ years of project leading experience. He worked for garage startups (KnCMiner), big enterprises (HP Software), trucks manufacturers (Scania AB) and unicorns (Spotify). Sasha has solid experience with data structures (state machines), compilers (syntax trees), blockchain (cryptocurrencies, smart contracts), CI/CD pipelines (Jenkins, Vagrant, docker, ansible, Azure DevOps) Sasha's experience is broad. He worked on self-driven cars, smart cards, bitcoin mining devices, embeded SDK, file system drivers, shared storages, medical data parsers, you name it. Sasha holds a Bachelor degree in Computer Engineering and a Master degree in Computer Science.

C/C++, C++, C#, Algorithms, Embedded C, bitcoin, blockchain, cryptography, Design Patterns, Python, bottle, web3js, Ethereum, DApps, STL, Git, Multithreading, Networking, Linux, Windows, OOP, Jenkins, Docker, Ansible, CI/CD, Microsoft Azure, REST API, MongoDB, DevOps, Agile, JavaScript, Jira, Scrum

+ created CI/CD pipelines for self-driven cars + created PoC MVP blockchain DApps for banks + organised blockchain hackathon (speaker, mentor) + worked on first ever 16nm bitcoin mining ASIC + worked at Spotify on embedded SDK + improved product performance up to 70% + reduced product memory usage up to 8 times + reduced product installer size up to 10 times + recruited 10+, interviewed 100+ employes

23 January

Blockchain expert (part-time, remote)

Kyiv, Lviv · $4000 · 10 years of experience · Upper Intermediate

I'm a blockchain guru with 10+ years of working experience. - Having experience with Ethereum, Bitcoin, Dash, Hyperledger Sawtooth public and private blockchains - Experienced in Blockchain Architecture design and smart contracts development - Decentralized Finance expert - Experienced in forking networks - Experienced in leading a team of engineers - Practical experience with high load projects

AWS, CSS, HTML, MySQL, PHP, Java, JavaScript, Linux, Spring, Serverless, Hyperledger, Sawtooth, Python, Ethereum, web3js, Blockchain, Git, MongoDB, REST API, SQL

Interested in a small fast-growing startup. A part-time job only (15-40 hours/week). Hourly rate $40

22 January

DevOps Architect

Kyiv, Lviv · $6000 · More than 10 years of experience · Advanced/Fluent

Accomplished technical professional with 12+ years of experience in leading complex projects and managing cross-functional resources to optimize enterprise technology. Committed to quality and service excellence with attitude for launching new technology operations, including client vendor relationships, policies and procedures, business processes and SLAs. Preparing Request for Proposal for several clients (both existing and new) for Devops implementation for various technologies Core competencies includes: Devops Onshore Project coordinator Software Testing & QA Test Automation Architect Problem Solving and Mentoring Project and People Management Team Leadership Technology Architect Stakeholder Communications Environment Management Company: Idealo Internet GmbH Designation: Senior Devops Project Title: Data Platform Company: Crealytics GmbH (Germany) Designation: Operation Engineer Project Title: Datacenter migration to Google cloud Platform Company: Deutsche Bank Operation International (India) Designation: Devops Lead (Assistant Vice President) Project Title: PW&CC Technology – Devops Implementation Company: Accenture (India) Designation: Devops – Technology Architect (Associate Manager) Project Title: Mulesoft - Service Integration; HR System - Service Integration Accenture (United Kingdom) Designation: Environment Management and System Integration(Team Lead) Project Title: NGBSS Transformation Company: Accenture (India) Designation: QA Engineer (Senior Software Engineer) Project Title: Core Processing – Accounting Company: Persistent Systems Ltd. Designation: QA Engineer (Senior Software Engineer)

Python, Apache, Jenkins, AWS, Ubuntu, Networking, Linux, Zabbix, Backup Solutions

Development and implementation of DevOps platform for MuleSoft was done for the first time in the company (Accenture)

To learn new technology, to have ownership of product or technology.

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