Oleksii Yatsenko

Working with a travel tech software. - Added new booking channels to the communication system & automation rules.
- Developed new automation rules and enhanced old one's.
- Enhanced communication with AI & templates.
- Increased the reliability of the communication with guests.
- Architected and implemented a scalable communication platform.
- Designed and developed the router for 3rd party (integrations) requests using Go.
Learned: working with dozens of the integrations, relying on the services without the normal sandboxes, improved unit testing skills, using AI for development.

Unicorn company from Boston with largest R&D in Ukraine that provides a platform for automating business processes / document-signature solutions currently operating 5 products.
Started working at airSlate product pdfFiller. Cloud: AWS

May 2017: worked on the new "SendToSign" version for pdfFiller + support.
Learned: A/B testing, deployments with minimizing risks of breaking things, teamwork, continuous improvement based on the customer feedback.

2018: - switched to new product "airSlate" in a team that was developing microservice like Google Forms using PHP. Had an experience of interactions between a lot of microservices, working in constantly changing environment of brand-new product, active involvement within the team processes.
Learned: building products from scratch, interacting in early structure organisation, taking responsibility for the team.

2020: Worked on new features for "SendToSign" in SignNow.
Learned: sprint planning, better Agile organization, unit&integration testing, enterprise-like PHP/Laravel approach, building a public API.

From 2021 to 2024: responsible for backend for mobile. Handling the request from mobile developers, developing new features and designing the solutions for problems with mobile clients.
Widely using Laravel and its components, NodeJS and closely collaborating with the frontend.
Learned: mobile-backend interaction, backend reliability for the mobile devices, building new services in enterprise-like organisational structure.

Product that offering mass placement of adverts in the catalogs. Integration with cell operators for advertising and adverts websites for placements.
PHP, Yii, PostgreSQL, NodeJS.
Learned: working in startup with little resources, building the system with huge amount of integrations, working for a local market on a 3rd world country.

Development platform for Ukrainian public procurement system using PHP(Kohana), MySQL, HTML, CSS, JS, jQuery.
Worked in team of 3 developers. Integrating with API of Ukrainian public procurement system, aligning with the government standards.
Learned: working in a company highly tied to governmental API, developing product according to the governmental specification

Web-design studio mostly focused on work with the local clients. A lot of work with HTML/CSS markups + WordPress integration.
Custom WordPress functionality using PHP, JS, JQuery. Completed few websites for the clients.
Learned: developing the websites for a small business, creating HTML/CSS layouts

Got my first job after doing some freelance work of developing the website for searching jobs in Poland.
Then I was in charge of support and new features.
I've used PHP+Kohana framework, MySQL, HTML, CSS, JS, jQuery, WordPress (used for news websites apart from the main project).

In the end I've completed the website that had functionality of creating positions, CVs and applying for positions.

Learned: creating the website from scratch, being fully in charge of both Front and Back parts

Not actively supported. Project I've created as an alternative to Firefox relay to bring it to other platforms.
With ProxiedMail you can generate endless emails hosted at your or their domains with forwarding to your real email.
Product use case is privacy protection, spam protection, email migration between providers, using custom domains in a better and cheaper way, and smart emailing features like a webhook or API.
Got into top-10 of the day on the ProductHunt.
Sold most expensive email on the internet ($1K/mailbox, @iam-rich.net)

Website: proxiedmail.com
Github: https://github.com/proxied-mail
Learned: customer support for geeks, building redundancy with limited resources, product pivots, marketing in a competitive market, fraud prevention, supporting public API.

Not actively supported. Open-source tool for running A/B tests. Take a look on GitHub or website.
Learned: demos for B2B, creating the clients for different programming languages, marketing for developer-oriented product.

Social project that bringing strangers together at the dinner.
Anyone who want to meet just purchasing a ticket and then we're organizing a dinner for them in groups of 5 people.
I've organized 3 dinners with 30 people in total from Instagram advertising.
Closed down due to competition and lack of energy for that amount of communication, but it was nice to try and close it down with return on advertisement investment, but not my time.
Instagram
Learned: communication&customer support for people with different language than English, Portuguese culture of communication specifics, validating the hypothesis and going forward.

Started as a first product just to train my skills and try new things.
Initially tried to built Instagram Analytics, but eventually end up building Instagram Story Saver - tool that was automatically saving Instagram Stories of selected accounts to the Dropbox.
Achieved $10K ARR right before Meta requested to close it down.
Most of the traffic was coming from SEO. Clients from around the world.
Learned: working with B2B and B2C clients, customer support, using reverse-engineered API (never again)