Selected Work

Built, not briefed.

Products I've built and platforms I've delivered, most of them in payments. Building keeps me honest about what my teams ship, how long it takes and what it costs.

Featured

Products I've built.

Oskar's respondent home page in Polish, inviting people to share their opinions on products, with a button to browse open studies.
Client platform · Touchideas

Oskar

Problem. Traditional surveys can limit follow-up and miss the reasoning behind an answer.

Solution. Software architecture and development of a conversational AI research platform, translating research workflows into a working digital product.

Case studyarrow_forward
NewRemit rate landscape for a 500 GBP transfer from the UK to India, comparing providers' effective rates against the interbank mid-rate
Payments analytics

NewRemit

Problem. Cross-border pricing is spread across providers, corridors, fees and FX margins, which makes like-for-like comparison hard.

Solution. A platform I designed and built to analyse cross-border payment markets, combining payments expertise with full-stack development, data processing and interactive analytics.

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FineStack landing page: on-chain money, taught the way payments people learn
Interactive payments learning

FineStack

Beta

Problem. Payments teams need to understand stablecoins and on-chain settlement, but most material is written for developers or traders.

Solution. An interactive Ethereum and stablecoin learning platform for payments professionals, combining financial-services expertise with hands-on product development.

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Client Work

Built for clients.

Platforms built for clients in payments and retail, from scope to production.

How I Build

Hands-on, by choice.

Building changes how I scope, hire and decide. I know what a feature costs because I have shipped it myself.

01

Payments domain → product

Card acceptance, remittance corridors and bank partnerships, turned into products that price, map and benchmark payment markets.

02

AI in production

LLM features running for real users: conversational research, content pipelines, automation. Cost, latency and failure modes owned end to end.

03

Full-stack delivery

Next.js, TypeScript, Python and Postgres, from architecture to deployment. Small teams, short cycles, code in production.

04

Data for decisions

Pricing, network and market data collected, cleaned and put in front of the people who decide, from compliance risk tools to geospatial dashboards.

Work with me

Need this kind of thinking?

02

Build with Vacaloca

I co-founded Vacaloca Labs, a boutique studio building web, data and AI products. Working with my co-founder across strategy and design, I lead software architecture and hands-on technical delivery, from product definition through implementation and deployment.

  • checkAI products & LLM integrations
  • checkInternal tools & dashboards
  • checkCustom web platforms
Explore Vacaloca Labsarrow_outward

Advisory. Open to selected conversations on payments product strategy, fintech go-to-market and practical AI adoption in financial services.

Discuss an advisory opportunityarrow_outward