01
Websites & web apps
Fast, multilingual websites and web apps with Vue, Nuxt and Tailwind CSS. Search-friendly, mobile-first, no page-builder bloat.
- Company sites & landing pages
- Web apps & dashboards
- DE / EN / FR
- Swiss hosting available
Open to a permanent role from October 2026 · Lucerne / Zug / Zurich
Software Developer · Lucerne, Central Switzerland
Software built
for production.
I'm Serhii Ovsiienko, a software developer with ten+ years in software and financial technology. I build backends, web applications, data pipelines and AI integrations — and I'm looking for a team where I can contribute for the long run.
Serhii Ovsiienko
Software Developer
- Vue
- Nuxt
- Tailwind
- Python
- Rust
- PostgreSQL
- years of software development
- 10+
- years of software development
- own products in production
- 5
- own products in production
- from backend to interface
- Full-stack
- from backend to interface
- delivery and communication
- DE · EN
- delivery and communication
01 — Client work
Websites that work.
eventis.life
Event agency · Lucerne
EVENTIS.Life
A boutique agency for curated live entertainment across Switzerland. The brief: a site that conveys the atmosphere of their events and brings in enquiries — elegant, bilingual and fast.
Scope
- Concept & design
- Development
- German & English
- SEO & sitemap
- Hosting & operations
- Nuxt 4
- Tailwind CSS
- i18n
- Docker
associazionefaro.org
Scientific association · Como (IT)
FARO
Site for an association on the foundations of physics: animated lighthouse illustration, Italian content and an online membership form.
- Design
- Animation
- Forms
fqm100.org
International conference · Como (IT)
Como 2027 Foundations
Centenary conference site: programme, speakers, registration and abstract submission with an admin area, plus an interactive 360° reconstruction of the venue.
- 3D / three.js
- Registration
- Admin
02 — Work
Own products, in production
Five products, designed, built and operated solo — from the Rust core to the interface.
Market analytics
AI Price Patterns
< 1 ms
response time
Explainable market analytics: Rust vector search over 2.5 M price patterns from ten years of history. Every signal ships with its historical evidence.
- Rust
- Python
- Nuxt
- Docker
Desktop app
RLX Backtester
6.6 M/s
data points
Native macOS app for strategy research. Rust engine with walk-forward and Monte-Carlo validation and 30+ risk metrics.
- Rust
- PyO3
- macOS
E-commerce
SalesEntry
< 10 ms
per request
Real-time recommendations for online shops: matches a visitor's click path against completed purchases and surfaces the next best step.
- Rust
- WebSocket
- Nuxt
Payments
Manus Pay
Self-hosted payment and treasury service with a policy engine, API gateway and hardened key handling.
- Rust
- Vue
- Open Source
Robotics
VBRL
20 Hz
on edge CPUs
The memory layer for robot skills: turns demonstrations and trained controllers into searchable skill banks. At runtime it retrieves relevant experience, ranks it by outcome and turns it into commands — every command traceable to its source, no GPU needed.
- Rust
- WebSocket
- CPU inference
03 — Experience
Career
- 2024 — 2026
Software Developer · Marbell AG
Rotkreuz, Switzerland
Backend applications and REST APIs in Python and JavaScript, ETL pipelines for financial and market data, dashboards, model infrastructure integrated with IG Bank and Interactive Brokers, LLM integration.
- 2023 — 2024
Independent Developer · Financial software
Remote
Grew AI Price Patterns into a production API service; built Manus Pay.
- 2022 — 2023
Software Developer · Blockforce Capital
USA, remote
Reinforcement-learning simulation and optimisation systems; interactive dashboards for monitoring and backtesting.
- 2019 — 2022
Founder & Software Developer · AI Price Patterns
Ukraine
Built the platform: Rust vector-search core and backtesting engine, data pipelines, web frontend, deployment.
- 2015 — 2019
Quantitative Developer · SK Capital Partners · Caviar
Remote
Quantitative strategies, statistical models and predictive-analytics pipelines in Python and R.
Education: Specialist degree in Finance (Economist, Financial Manager), Interregional Academy of Personnel Management, Kyiv.
04 — Focus
What I bring to your team
Four areas where I have built and run production software — as an employee and in my own projects.
02
Backend & APIs
REST APIs, services and integrations with your existing systems — robust, tested and built so your team can carry them forward.
- Python · Node.js · Rust
- PostgreSQL · Redis
- Docker & deployment
- Third-party integrations
03
Data & automation
Data pipelines, cleaning and reporting that replace manual spreadsheet work. Recurring tasks then run on their own.
- ETL pipelines
- Reports & dashboards
- Real-time data
- Process automation
04
AI integration
Put large language models to work in your processes: assistants, document processing and agents — explainable, not a black box.
- LLM assistants
- Documents & search
- Agents with MCP
- Privacy-aware
05 — About
Precision, learned in finance.
I started in quantitative teams, where a bug in the data costs money immediately. That shaped how I work: measure first, then build, and make every decision traceable.
I live and work in Central Switzerland, and I value clear agreements, reliability and software that still makes sense in five years.
- Based in
- Lucerne, Switzerland
- Languages
- English · German (B1) · Ukrainian · Russian
- Work model
- On-site, hybrid or remote
06 — Contact
Let's talk.
Looking for a software developer for your team? I'd love to hear from you — a link to the job ad is welcome. References and my employment reference are available on request. I usually reply within one business day.