Mike Oleynik

Backend Engineer · RnD-enthusiast

What I do

I build backend using Ruby/Elixir, combining technical expertise with design thinking principles — from prototype to production.

  • As a designer (at heart), I find ideas for solving problems.
  • As a programmer, I implement ideas and concepts.
  • As a man, I feel a great sense of satisfaction when it works.

How I can help you

💻 Backend Software Development

I build reliable and scalable backend systems, ensuring high performance and fault tolerance — with a focus on clean code and optimal architecture.

Ruby on Rails · Elixir/Phoenix · Erlang/OTP · PostgreSQL · Redis · Kafka

🔌 API Development

I design and implement RESTful APIs and gRPC services that enable seamless integration and high throughput. Special attention is given to developer experience for frontend teams and external partners.

REST API · gRPC · OAuth2 · JWT

🧠 Solutions Architecture

I architect complex systems with a deep understanding of business requirements, technical constraints, and future scalability.

Domain-Driven Design · Event-Driven Architecture · Microservices

🚀 MVP Development

I rapidly build Minimum Viable Products (MVPs) to validate ideas and bring them to market fast.

Design Thinking · Lean

What I'm looking for

💼 Full-Time Development

I'm open to full-time roles focused on backend systems and API development. I approach tasks with depth and consistency, aiming not just to write code — but to understand how it drives the product and the business forward.

🧭 Part-Time Consulting

I collaborate with startups and companies undergoing digital transformation. I can strengthen an existing team or help launch a new product from scratch.

🔧 In Any Format

I dive into the specifics of your domain, actively propose product hypotheses, and quickly deliver prototypes to validate ideas. Even in part-time engagements, I focus on building long-term, value-driven partnerships.

If you or your company are interested in working with me, feel free to send me a telegram or email.

Soft skills

  • Creative thinking under pressure

    I come up with innovative solutions even under tight deadlines.

  • Cross-cultural competence

    I excel at working with diverse perspectives and collaborating effectively in international teams.

  • Life-long learning

    I continuously enhance my skills and explore new technologies, applying interdisciplinary approaches to solving problems.

What I'm interested

I'm fond of design thinking and product design: I come up with ideas, analyze market and target audience, create MVP.

  • edctn.

    EdTech, 2019, concepts for improving online education. "A teacher should be a rockstar."

  • spoapo.

    EdTech/VoiceTech, 2020, voice assistant for students. "A student should be a rockstar."

  • weighbull

    Fun/Smart Devices, 2021, A smart bracelet for farm animals on any planets (😂).

  • sestra.ai

    MedTech, 2022, voice assistant for doctor.

yagni, maybe

You can consider this my blog. Here I structure my thoughts in the form of essays or notes.