KraftCodes

Your business runs better with software you can trust

Simple solutions. Solid results. On time.

The craft of building reliable software
From Logic to Infrastructure

From Vision
to Product

What we deliver

FinTechWeb ProductsBrand IdentityHealthcareSaaS PlatformsGlobal InfrastructureFinTechWeb ProductsBrand IdentityHealthcareSaaS PlatformsGlobal Infrastructure

What you get

Every engagement ends with something you own: a brand, a product, a system, or a plan that your team can execute with confidence.

Client Results

Real problems we were brought in to solve, and what we shipped.

Two strangers needed to exchange money without either one having to trust the other first. We built the settlement layer that made that possible. Every state transition is locked, audited, and provably correct. No race conditions. Not a single incident since launch.

Funga-Deal: Escrow Infrastructure

99.99%
Uptime
<50ms
Settlement
0
Incidents

A cyclist has maybe half a second to react to a hazard on the road. We built a video analysis system that spots danger and sends a warning faster than a human can blink, running entirely on the device so there is no server delay in the loop.

CycleVision: Road Safety Platform

40ms
Response
Edge
Processing
120fps
Throughput

When you are handling patient data, a breach is not just a technical problem. It is a human one. We built the privacy layer from the ground up, with full data isolation and a complete audit trail so that every access is accounted for, every time.

Healthcare Data & Privacy

E2EE
Encryption
100%
Audit Trail
HIPAA
Grade

Live Products

See it live. Try it now.

Every card below links to a deployed product.

scroll to explore →

Gift Discovery Platform
Open site
gifts.kraftcodes.com

Gift Discovery Platform

Curated gifting, built to convert.

E-CommerceUX DesignFull-Stack
Live Demo
Car Marketplace
Open site
cars.kraftcodes.com

Car Marketplace

Browse, filter, and buy with confidence.

MarketplaceSearch & FilterFull-Stack
Live Demo
Footwear Store
Open site
shoes.kraftcodes.com

Footwear Store

Modern retail, fast and frictionless.

RetailProduct CatalogFull-Stack
Live Demo
Electronics Store
Open site
electronics.kraftcodes.com

Electronics Store

Searchable, fast, conversion-optimized.

RetailPerformanceFull-Stack
Live Demo
Fitness Club Website
Open site
witeithiefitnessclub.com

Fitness Club Website

Brand presence that drives membership.

WellnessBrand DesignWeb
Live Demo
Furniture Store
Open site
seats.kraftcodes.com

Furniture Store

Pick your seat, confirm in seconds.

TicketingUX DesignFull-Stack
Live Demo
QuickDeliver
Open site
quick-delivery-n9iw.vercel.app

QuickDeliver

Local meals and groceries delivered straight to your door.

LogisticsOn DemandWeb App
Live Demo
Apartment Management
Open site
apartment-management.onrender.com

Apartment Management

Property management portal with automated billing and tenant tracking.

PropTechProperty AppWeb Portal
Live Demo

How we engage

Three steps. No surprises.

Every engagement follows the same structure. It keeps things honest, moves fast, and means you always know exactly where you stand.

Book a discovery call
01

Discovery Call

We spend 45 minutes understanding what you are building, where it is breaking down, and what a good outcome looks like. No pitching, just questions.

02

Architecture Proposal

We come back with a written proposal: the problem as we understood it, the approach we recommend, what we will not do and why, timeline, and cost. You keep it regardless.

03

Embedded Execution

We work inside your team, not alongside it. Direct Slack access, weekly syncs, and full ownership of the scope we agreed. No account managers in between.

Open source

Live from the Lab

more shipping soon
kraftcodes / kc-state-machine
TypeScript
214
kraftcodes / edge-infer
Rust
187
kraftcodes / pgvault
Go
93

From the engineers

Things we learned building in production.

FinTech2 min read

Why Your Payment State Machine Is Probably Wrong

Most payment bugs are not bugs. They are design decisions that felt fine at the time and only revealed themselves when real money was involved.

System Architecture3 min read

The Hidden Cost of Skipping Architecture: A Post-Mortem

A breakdown of a real system failure caused not by bad code but by three decisions made in the first week of the project, before a single line was written.

About

Nairobi / Belfast

KraftCodes started at a terminal screen inside the math labs of Jomo Kenyatta University, where a small circle of engineers became obsessed with one question: why does so much software break under pressure?

The answer was never the code. It was the absence of architecture.

The Name

Kraft

German. Noun. Power, strength, force.

01

You get what was agreed

We define every detail before we build, so there are no surprises in delivery. What we scope is what you receive, on time and working.

02

It works when it matters

We build for the conditions that break other systems: real traffic, real load, real pressure. Not demo conditions. The kind that show up at 3am on a Tuesday.

03

You own the outcome

We document every significant decision so your team inherits something they understand. Not a black box they have to reverse-engineer when we leave.

The Early Work

Real systems. Before we had a name.

Not hypothetical problems. Each one forced a confrontation with what happens when the system is wrong and it actually matters.

Biometric face recognition technology
01

Face Access Control

SecurityHardware IntegrationBiometrics
Mobile payment and fintech transaction
02

Funga Deal

FinTechZero TrustEscrow
Trading charts and market data
03

Polymarket Copy-Trading Bot

Prediction MarketsAutomationReal-time

Beyond the Build

When the problem is harder, we go deeper.

Take a problem that seems too unstructured to engineer around, and build something precise and dependable on top of it.

Person in a video interview
01

Interview Signal Analyzer

Hiring TechVideo AnalysisProductivity
Audio recording and analysis setup
02

Audio Intelligence

Knowledge ManagementSearchProductivity
Analytics dashboard with customer data
03

Customer Feedback Intelligence

Customer IntelligenceAnalyticsData Pipelines

Where We Are Now

Headquartered in Belfast. Operating globally.

Founded by Derrick Gitonga, KraftCodes partners with founders and teams building things that cannot fail. Engineering roots in Nairobi. Client footprint across London, the US, and Europe.

What we build

From FinTech infrastructure, custom school management systems, and enterprise ERP solutions to healthcare platforms, we build the systems that companies depend on when the stakes are too high for improvisation.

How we engage

We do not send you developers. We embed a team that takes ownership. Fixed scope, direct communication, and full accountability from kickoff to launch.

We build things that work. Then we make sure they keep working.

Built on the belief that the world has enough app builders and not enough architects.

Talk to our team

Trusted by teams building in production

Vaultpay
Medcore
Stackframe
Loopchain
Truvault
Nexbridge
AO
DNC
TF
PN
JO
SY
KA
RM
DA
FA
MS
AB
ZO
FH
BE
LH
NB
CU
SR
EO
IC
PM
YA
CD
OF
SK
GN
AH
RK
MT
VN
AU

KraftCodes came in when our payment settlement layer was failing under load and no one could tell us why. Within two weeks they had redesigned the state machine and we have not had a single incident since. They do not guess, they diagnose.

AO

Amara Osei

CTO, Vaultpay

FinTech

We needed HIPAA-grade data isolation inside a product that was already live with patients. KraftCodes handled the architecture without touching the user experience. That is a hard problem and they made it look easy.

DNC

Dr. Niamh Callaghan

Founder & CEO, Medcore Health

HealthTech

We had been fighting a race condition in our job queue for four months. Three different contractors looked at it and nobody found it. KraftCodes found it in three days and explained exactly why it was happening. That kind of diagnostic thinking is rare.

TF

Tomas Ferreira

Head of Engineering, Arclight

SaaS

Our tracking system was processing events in the wrong order and drivers were getting conflicting instructions. KraftCodes rewrote the event pipeline and we went from two escalations a day to zero. The fix has held up through peak season without a single issue.

PN

Priya Nair

VP of Product, ShipRoute

Logistics

Our checkout was taking over four seconds on average. We knew it was a problem but we did not know where to look. KraftCodes came in, identified three bottlenecks we had never noticed, and got us under 800ms. Conversion went up the same week.

JO

James Okafor

CTO, CartLink

E-Commerce

We had a learning platform with seven different content types and a recommendation engine that was not recommending anything useful. KraftCodes rebuilt the logic from scratch and engagement time doubled within a month. They understood both the technical problem and the product problem.

SY

Selin Yildiz

Co-founder, Learna

EdTech

We needed a property portal that could handle concurrent listing updates without data conflicts. KraftCodes designed the locking strategy and the whole thing has been running clean since day one. Our agents stopped calling us with complaints.

KA

Kwame Asante

CEO, PropNest

PropTech

We needed case files accessible only to the right people at the right time, with a full audit log. KraftCodes built the permission layer in a way that actually made sense to our legal team. They did not just build what we asked for. They asked better questions first.

RM

Roisin Murphy

Operations Lead, LexFile

LegalTech

Our claims processing pipeline was a mess and we knew it. KraftCodes mapped the whole thing, told us what to fix and what to leave alone, and rebuilt only the parts that mattered. We cut processing time by 60 percent without touching anything the underwriters relied on.

DA

Daniel Achebe

Head of Platform, CoverBase

InsurTech

When order volume spikes, most systems start dropping things. Ours was dropping orders silently which is the worst kind of failure. KraftCodes redesigned the queue handling so failures are loud and recoverable. We have not lost an order in seven months.

FA

Fatima Al-Rashid

CTO, Mealbox

FoodTech

We brought KraftCodes in to review our authentication system before a major client audit. They found three issues our internal team had missed and wrote up clear remediation steps. The audit went clean. That engagement paid for itself many times over.

MS

Marcus Svensson

Security Lead, Shieldline

CyberSec

We had a CMS that was becoming impossible to maintain. Every new content type required a developer and the editorial team was frustrated. KraftCodes refactored the content model and now editors can do it themselves. That freed up two engineers for other work.

AB

Aoife Brennan

Head of Engineering, Inkwell Media

Media

We had a loan eligibility engine that kept breaking whenever we added a new product type. Nobody could explain why the rules were conflicting until KraftCodes mapped the whole thing out. They rebuilt it so each rule is independent and testable on its own. We have launched four new products since then without any of the old issues.

ZO

Zara Okonkwo

Founder, Bridgefund

FinTech

I have worked with outside contractors before and the code always ends up being something you have to rewrite six months later. KraftCodes was different. The code they shipped matches our internal style, has sensible tests, and our team can maintain it without asking anyone for help. That alone was worth the engagement.

FH

Felix Hartmann

Lead Engineer, Corenode

DevTools

Our mobile wallet was timing out on transactions over a certain size and we could not reproduce it consistently. KraftCodes tracked it down to a threading issue in our background reconciliation job. The fix took a day once they found it. The debugging process was methodical in a way our own team genuinely learned from.

BE

Blessing Eze

CEO, PayNow Africa

FinTech

We needed to rebuild our appointment booking flow without disrupting the roughly 400 daily bookings happening on the old system. KraftCodes ran both versions in parallel behind a feature flag and migrated users over gradually. Not one booking was lost during the whole process. That level of care is genuinely hard to find.

LH

Lara Hutchinson

Product Manager, Optic Health

HealthTech

Our onboarding flow had a 62 percent drop-off and we had no clear picture of where people were leaving. KraftCodes added proper event tracking, analyzed the data, and redesigned the two steps causing the most abandonment. Drop-off is now under 25 percent and it has held there for three months.

NB

Nathan Birch

CTO, Workpath

HRTech

We were dealing with exam submissions that were occasionally getting saved twice or not at all under load. For a student assessment platform that is a serious problem. KraftCodes implemented idempotency at the API layer and the issue went away completely. Simple fix once you know where to look.

CU

Chisom Ugwu

Co-founder, Classhive

EdTech

We needed a document pipeline that could ingest, classify, and route different property documents to the right teams automatically. KraftCodes built it in three weeks and the classification accuracy was better than we expected from day one. Our ops team went from spending four hours a day on this to almost nothing.

SR

Sofia Randall

Head of Product, Clearfield

PropTech

Our vehicle tracking had a lag that was getting worse as we added more fleet clients. We assumed it was a database problem. KraftCodes figured out it was a WebSocket connection pooling issue we had not thought to check. They fixed it and explained the root cause clearly enough that we could have caught it ourselves next time.

EO

Emmanuel Owusu

CTO, Fleetlink

Logistics

We needed to pass a security audit before our Series A close and had two weeks to prepare. KraftCodes reviewed our auth and data access layers, flagged six issues, and helped us fix the two critical ones before the deadline. We passed. I do not want to think about what would have happened without that review.

IC

Ines Carvalho

Engineering Lead, Finlens

FinTech

Our marketplace was growing faster than our infrastructure could handle. Pages were slow, searches were timing out, and sellers were getting frustrated. KraftCodes did a thorough performance audit and prioritized fixes by impact. Within a month the site felt like a completely different product.

PM

Patrick Mwangi

CEO, Sokomart

E-Commerce

We had a reporting module that was running queries for up to 40 seconds on some accounts. We had learned to live with it. KraftCodes looked at the query plans, rewrote three queries, added two indexes, and now the worst case is under two seconds. I wish we had just asked someone sooner.

YA

Yemi Adeyemi

VP Engineering, Staxpay

FinTech

Mental health data has very specific compliance requirements and we needed to get them right before launch. KraftCodes walked us through what we actually needed versus what we thought we needed, which saved us a lot of time and unnecessary complexity. The system they built is clean and the audit trail is exactly what our compliance team asked for.

CD

Clara Doherty

Co-founder, Mindtrack

HealthTech

We had a notification system that was delivering payment confirmations out of order about 15 percent of the time. That is a real trust problem in a payments product. KraftCodes redesigned the delivery queue and the ordering has been correct ever since. One of those changes that is invisible when it works but completely critical.

OF

Olumide Fashola

Head of Engineering, Sendwave

PayTech

Our tenant screening process was manual and was bottlenecking every deal. KraftCodes built us an automated pipeline that pulls from three data sources, runs the checks, and surfaces a summary for our team. We went from spending 90 minutes per application to about five. The time savings compound fast.

SK

Sabrina Kline

CTO, Rentbase

PropTech

I am not a technical founder so I needed a team I could trust to make the right calls without me validating everything. KraftCodes was upfront about tradeoffs, explained their decisions in plain terms, and pushed back when I asked for something that would have caused problems later. That is exactly what I needed.

GN

Garrett Ndungu

Founder, Invoicejet

B2B SaaS

Our data pipeline was dropping records silently when schema changes happened upstream. We only found out when clients reported numbers that did not add up. KraftCodes added schema validation and a dead-letter queue so failures are visible immediately. We catch problems now before clients ever notice them.

AH

Astrid Holmberg

Data Lead, Lumio Analytics

DataTech

Search relevance was the core of our product and it was not working well. Results were technically correct but not useful to real users. KraftCodes rebuilt the ranking logic with better signals and the feedback from users shifted almost immediately. People stopped asking why certain results were showing up.

RK

Raymond Kariuki

Founder, Tafuta

Search SaaS

We had an inventory sync between our warehouse system and online store that was getting out of step during peak hours. Customers were checking out items we did not actually have. KraftCodes traced it to a timing issue in the sync job and fixed the conflict resolution logic. Oversells dropped to zero the following week.

MT

Miriam Tanaka

VP Product, Hoshi Retail

RetailTech

We needed real-time price feeds integrated into a trading interface with sub-second update requirements. The first version we built in-house had too much latency. KraftCodes rewrote the WebSocket layer and we hit the latency target within a week. The implementation was clean enough that our team could extend it without any help.

VN

Victor Nwosu

CTO, Tradepulse

FinTech

Our patient records system needed to stay live during a database migration with no maintenance window allowed. KraftCodes planned the whole thing carefully, ran it on a Saturday morning, and it was done before most of our team started work. We had been putting that migration off for months because we were scared of it. They made it feel routine.

AU

Adaeze Uche

Co-founder, Hubmed

HealthTech

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Tell us what you are building

Tell us what you are building. We will come back with a written proposal — no obligations, no sales call until you want one.