Software developer · founder

I make things exist.

5 years shipping production apps at a Finnish bank, accounting SaaS, and national infrastructure. Now building 12 startups in 12 months. In SF June–August, looking for a cofounder or an exciting team.

12 startups in 12 monthsLearned Finnish as an adultCreated a non-profitStarted a Finnish baseball communityGrew a run club 5 → 20 in winter
See what I've builtWho I am
2
of 12 startups shipped this year
Building
month 2 / 12
Available in San Francisco
June 10 – August 2026
Open to cofounder conversations, advisory meetups, and the right full-time role.
Let's meet in SF →
Track record
Finago Group
Mobile Software Developer · Aug 2025 – Feb 2026

Contributed to Procountor Mobile — a cross-platform accounting app used daily by Finnish SMEs. Owned financial reporting features end-to-end: fiscal period logic, management reports, chart correctness.

4.6★iOS rating
4.4★Android rating
+55NPS
React NativeTypeScriptFintechProduction
CGI → Finnish Forest Centre
Software Developer Consultant · Dec 2022 – Jul 2025

Embedded in the team building Sampo — the national forestry platform used by forest owners, operators, and public authorities across Finland. Independently designed and shipped an automated geospatial validation pipeline for subsidy applications; the approach became the team standard.

Nationalscale deployment
AWSLambda + Step Functions
PythonGeoPandasReactAWSGeospatial
Alisa Bank
Mobile / Frontend Developer · Jan 2021 – Oct 2022

One of two developers who built a fully digital mobile bank from scratch — transforming a P2P lending app into a regulated banking product. Owned ~25% of the React Native codebase in a correctness-critical, compliance-heavy environment.

1 of 2devs on the core app
Regulatedbanking domain
React NativeBankingLegacy modernisation
What I've shipped
01 / 12
Ostajan Raportti
ostajanraportti.fi ↗

B2C service that analyzes Finnish apartment purchase documents and generates a clear risk and negotiation report — a two-stage LLM pipeline on complex legal and financial PDFs.

LLMPDF pipelineB2CFinnish market
02 / 12
ClairTax
clairtax.com ↗

Automated tax reporting for Finnish retail investors — ingests broker exports (Robinhood, DEGIRO, eToro, IBKR) and produces tax-ready calculations, Vero-compatible CSV, and FIFO audit trail.

FintechFIFO logicMulti-brokerB2C
03 / 12
To be announced
coming soon

Every month, a new product. Following the problems I actually face — shipping and learning, publicly.

TBD
Who I am
Oheneba Poku-Marboah

Technical builder.
Unusually social.

I've been in Finland for over a decade, built production banking apps, contributed to financial SaaS, and shipped two startups this year. But my real edge is that I'm the kind of technical person who can walk into a room of non-technical people and actually connect.

I learned Finnish by pretending not to speak English for a year. I'm doing 12 startups in 12 months. I rebuilt a running club from 5 to 20 weekly attendees in 6 months. I don't just build — I get things to move.

I'm looking to relocate to San Francisco and find a cofounder to build with — or a team that needs someone who can own a product from code to customer.

01
High agency
I quit my job to go all in on building. I don't wait for permission or the perfect moment.
02
Socially gifted, technically grounded
People are consistently surprised a developer can operate like this. My unfair advantage.
03
Relentless follow-through
3 years running a Finnish baseball community. Got 300 teenage boys waking up at 4:30am to clean daily. DMed all 300 members of a run club to revive it. I get buy-in.
04
Never had a bad day
Seriously. Resilience isn't just something I practice, I'm wired that way.
Projects & community
How I Learned Finnish
howilearnedfinnish.fi ↗

Non-profit podcast for immigrants learning Finnish — built after pretending not to speak English for an entire year to force myself to fluency after a decade of avoiding it. Handles concept, interviews, recording, editing, and distribution solo.

Top 20% of video podcasts on Spotify · 2025
PodcastNon-profitFinnishCommunity
Helsinki Founders Run Club

Joined the organising team and grew weekly attendance from 5 to 20 runners in under 6 months — in the middle of winter. Did it by DMing all 300+ members individually to revive the group, adding slower pace options to be more inclusive, and moving the weekly poll earlier to boost sign-ups.

5 → 20 attendees/week · <6 months
CommunityOrganiserHelsinki
Finnish Baseball Community

Built and ran a weekly pesäpallo community for 3+ consecutive summers. Got 20+ players showing up consistently — a harder problem than it sounds when you're a Ghanaian guy organising a Finnish national sport.

20+ weekly players · 3 summers running
PesäpalloCommunity3+ years
Technical stack
Advanced
TypeScriptReact NativeReactNode.js / ExpressPostgreSQLMongoDBGitSoftware testingNext.js
Comfortable
PythonAWSSupabaseFirebaseLLM pipelinesStripeLinux
Domain experience
Banking / fintechCommunity buildingGeospatial data analysis

Let's build something.

In SF June–August 2026. Open to cofounder conversations, roles at early-stage startups, and anything interesting.

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