I'm David Kariuki, usually dk, a Software Engineer with a strong interest in building systems that are reliable, understandable, and maintainable.

My work generally sits at the intersection of:

• Backend and API engineering
• Java and Spring-based systems
• Linux engineering and automation
• Distributed systems and integration
• Infrastructure and self-hosting
• Networking and virtualisation
• Fintech and platform engineering
• Developer tooling
• System architecture and technical documentation

I enjoy understanding systems beyond the application layer, from the code running a service to the infrastructure, network, storage, and operating systems supporting it.

A growing portion of my engineering work is organized under Liniantt, with dedicated organizations focused on different technical domains.

Engineering · Technology · Product Development

Liniantt is the parent engineering organization behind my broader technical work and serves as the umbrella for several focused initiatives.

Its work spans software engineering, Linux systems, infrastructure, fintech, developer tooling, experimentation, research, and product development.

Explore Liniantt →

Designing and building backend services primarily around Java, Spring Boot, APIs, integrations, messaging, data persistence, security, and distributed application architecture.

Building reusable Linux tooling and automation through LinuxEuphony, including workstation provisioning, system utilities, infrastructure tools, and automation scripts.

Building loft, my personal infrastructure environment for experimenting with production-style networking, virtualisation, storage, observability, resilience, and self-hosted services.

Exploring serious fintech product ideas, reusable financial technology components, research, and platform engineering through Finvone.

I like approaching systems as complete engineering environments rather than isolated applications.

Requirement
    ↓
Architecture
    ↓
Implementation
    ↓
Integration
    ↓
Infrastructure
    ↓
Observability
    ↓
Operations

I work across backend systems, distributed applications, infrastructure, and developer tooling, with a strong focus on reliability, integration, and maintainability.

Designing service-oriented and distributed backend systems with emphasis on API contracts, integration boundaries, messaging, validation, security, observability, and operational reliability.

Working with relational data models, transactional workflows, schema evolution, performance-sensitive queries, migrations, and persistence design.

Building automation, provisioning workflows, system utilities, operational scripts, and repeatable developer environments.

Designing and operating self-hosted and lab infrastructure across compute, networking, storage, resilience, monitoring, and virtualisation.

Focused on maintainable architecture, clear system boundaries, resilient integrations, technical documentation, performance, security, and production readiness.

A selection of projects I actively maintain or have built across my personal account and LinuxEuphony.

Finvone projects and research are intentionally not listed here.
Visit github.com/finvone to explore the organization.

GitHub is also part of how I document technical learning, experimentation, and deeper dives into engineering topics.

Some of my longer-running learning repositories include:

• Mastering Data Structures and Algorithms
• Ace The Java Coding Interview
• LeetCode Practice
• JUnit Testing
• Java Collections

I'm a Night 🦉

🌞 Morning                689 commits         ███░░░░░░░░░░░░░░░░░░░░░░   13.28 % 
🌆 Daytime                1211 commits        ██████░░░░░░░░░░░░░░░░░░░   23.35 % 
🌃 Evening                1430 commits        ███████░░░░░░░░░░░░░░░░░░   27.57 % 
🌙 Night                  1857 commits        █████████░░░░░░░░░░░░░░░░   35.80 % 

📅 I'm Most Productive on Sunday

Monday                   891 commits         ████░░░░░░░░░░░░░░░░░░░░░   17.18 % 
Tuesday                  549 commits         ███░░░░░░░░░░░░░░░░░░░░░░   10.58 % 
Wednesday                513 commits         ██░░░░░░░░░░░░░░░░░░░░░░░   09.89 % 
Thursday                 826 commits         ████░░░░░░░░░░░░░░░░░░░░░   15.92 % 
Friday                   888 commits         ████░░░░░░░░░░░░░░░░░░░░░   17.12 % 
Saturday                 601 commits         ███░░░░░░░░░░░░░░░░░░░░░░   11.59 % 
Sunday                   919 commits         ████░░░░░░░░░░░░░░░░░░░░░   17.72 % 

I Mostly Code in Java

Java                     13 repos            ███████████████░░░░░░░░░░   61.90 % 
Shell                    4 repos             █████░░░░░░░░░░░░░░░░░░░░   19.05 % 
PHP                      2 repos             ██░░░░░░░░░░░░░░░░░░░░░░░   09.52 % 
HTML                     1 repo              █░░░░░░░░░░░░░░░░░░░░░░░░   04.76 % 
Python                   1 repo              █░░░░░░░░░░░░░░░░░░░░░░░░   04.76 % 

Engineering is not only about building software. I also value sharing knowledge, documenting what I learn, answering technical questions, and contributing back to the wider engineering community.

Stack Exchange My Stack Exchange activity spans technical communities including: Stack Overflow Unix & Linux Information Security Server Fault View my Stack Exchange contributions →

Articles & Developer Community I also share, read, and participate in technical content through developer communities. View my Daily.dev profile →

Language	Proficiency	Profile
English	Professional
Swahili	Professional
Spanish	Intermediate

If you have found my open-source work, technical contributions, or community involvement useful, you can nominate me for the GitHub Stars programme.