Custom Software
Developers in Europe/>

Costa Blanca Geeks develop forward-thinking custom software that meets your exact needs, is scalable, efficient, delivered with clarity and care.

Speak with our engineers
See our projects
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Independent Engineering Practice

Work directly with a principal engineer who designs and ships production systems.

Deep Technical Ownership

From architecture to implementation, I take responsibility for technical decisions and execution.

Independent & Remote

Based in Spain. Working globally with startups and product teams.

Direct Collaboration

You work with me — the engineer designing and writing the code.

Production-First

Systems built for scalability, maintainability, and real-world constraints.

Engineering Principles

How I approach building production systems.

Realistic Timelines

No magic deadlines. Careful estimates, early communication, responsible adjustments as scope evolves.

Code Quality by Default

Clean structure, thoughtful abstractions, and production-ready standards from day one.

Transparent Communication

Direct communication. Clear progress updates. No ambiguity about priorities or technical risks.

Clear Architecture Decisions

Every system starts with explicit trade-offs. I prioritize clarity, scalability, and long-term maintainability over short-term hacks.

Long-Term Thinking

Systems are designed to evolve — not collapse under growth.

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Selected Work

Digital bureaucracy enterprise platform, Europe.

Key features:
Automated processes, flexible data structure, search functionality, AWS deployment, multi-languages, multi- modularity.

Key contributions:
Performance update (x3 improvement for some requests, complicated SOAP integration).

Key technologies:

Exchange platform, Asia.

Key features:
High load, high requirements for sustainability.

Key contributions:
Team management, production support, DB concurrency and bottlenecks.

Key technologies:

Advertising platform, USA.

Key features:
Data collecting, data pre-processing, powerful search, UI ready API, automated processes, reports, AWS deployment.

Key contributions:
Integration with many data sources, data collecting and processing pipelines, microservices architecture. Implemented custom reporting on large amount of data.

Key technologies:

E-Mobility rental platform, USA.

Key features:
Rent an electric scooter via mobile app.

Key contributions:
Reviewed and improved suboptimal architecture. As a result, performance improved drastically. Implemented new features and fixed business
critical bugs.

Key technologies:

Exchange platform, Europe.

Key features:
Flexible exchange platform for enterprise equipment.

Key contributions:
Architecture the app with micro services approach,
development from the ground, building deployment pipelines on AWS, integrations, team management.

Key technologies:

NFT marketplace, USA.

Key features:
Sell, buy, and rent NFTs.

Key contributions:
Designed architecture and implemented cloud-friendly microservices from the ground, the application processed more than 70 million of NFTs. Built instant search and advanced sorting and filtering.

Key technologies:

Speak With Our Experts

About · Ivan Timoshenko

Principal Engineer

I design and build production systems that need to scale and stay reliable.

My work spans distributed backends, data-intensive platforms, search infrastructure, cloud-native deployments, and blockchain integrations. I operate hands-on — from architecture decisions to implementation and operations.

I’ve worked across early-stage startups, growing products, and larger platforms, often stepping in to clarify architecture, improve performance, and stabilize delivery pipelines.

LinkedIn GitHub X Medium Tech blog

Drop us a message and we will get in touch with you in 24h.

Pssst. I’m a solo principal engineer — you’ll work directly with me (no handoffs).

What service are you looking for?