Software that works
where the network
doesn’t.
Trenax is a Nairobi engineering studio. We build websites, apps and business systems for mobile money, mid-range Android and networks that drop.
- products shipped
- 50products shipped
- countries running them
- 4countries running them
- industries
- 12industries
- clients who come back
- 98%clients who come back
Trusted by teams across Kenya and East Africa
- Sokoni Trading
- Rapid Logistics EA
- Afya Health Group
- Acacia Real Estate
- Shule EdTech
- Savanna Collection
- Tumaini Foundation
- PesaFlow
- Mashamba Co-op
Sample client names shown — replace with permitted client marks before launch.
What we build
Every engagement starts from the commercial outcome and works back to the system that delivers it.
Web Development
Marketing sites, SaaS platforms, portals and dashboards engineered to load fast, rank well and convert the traffic you already pay for.
from KES 180,0004 - 10 weeks
Mobile Apps
Android, iOS and cross-platform applications designed for mid-range devices, patchy connectivity and mobile money - the conditions African users live in.
from KES 450,0008 - 16 weeks
Custom Software
ERP, CRM, POS, inventory and workflow platforms built around how your business actually runs, not how an off-the-shelf vendor assumed it should.
from KES 650,00010 - 20 weeks
E-commerce
Online stores and multi-vendor marketplaces that handle mobile money, live inventory and delivery without a developer babysitting every order.
from KES 350,0006 - 14 weeks
Branding & Design
Logos, brand systems, UI/UX and design languages built as reusable systems - so everything you publish afterwards stays consistent.
from KES 150,0003 - 8 weeks
IoT & Automation
RFID, GPS tracking, sensor telemetry and smart automation with dashboards that turn hardware signals into decisions your managers can act on.
from KES 500,0008 - 18 weeks
IT Consultancy
Architecture reviews, cloud strategy, security assessments and technical due diligence for teams making expensive, hard-to-reverse decisions.
from KES 120,0002 - 6 weeks
Most clients arrive with a business problem rather than a service. Describe what is not working and we will tell you what it takes to fix.
Systems people use every day
All work
Retail, 2025
Sokoni Marketplace
A multi-vendor marketplace connecting 300+ Nairobi retailers to customers, with M-Pesa checkout and same-day delivery routing.
- Monthly order volume
- 3.4xMonthly order volume
- Lost orders after launch
- 0%Lost orders after launch
- Faster order-to-delivery
- 47%Faster order-to-delivery
- Active vendors
- 300+Active vendors

Boda Fleet Command
Logistics, IoT
GPS and telemetry platform tracking 240 delivery motorcycles across Nairobi, with live dispatch and fuel-anomaly alerting.
31%Reduction in fuel cost
- SMS
MediClinic Records
Healthcare, Software
Electronic medical records and billing across six clinics, replacing paper files and cutting patient wait times by more than half.
-56%Average patient wait time

Acacia Properties
Real Estate, Websites
A property portal with virtual tours, mortgage calculators and qualified lead routing straight to the sales team's phones.
5.1xDirect enquiries

Shule Learning
Education, Mobile Apps
An offline-first revision app serving 40,000 secondary students, built to work on entry-level Android phones with no data bundle.
2.8 to 4.6Play Store rating
- Products shipped
- 50+Products shippedWeb, mobile, software and IoT builds since 2021.
- Industries served
- 12Industries servedFrom clinics and schools to logistics and fintech.
- Countries
- 4CountriesKenya, Uganda, Tanzania and Rwanda deployments.
- Client retention
- 98%Client retentionMost clients return for a second engagement.

Built here, for how business actually works here
Overseas studios build for a market they have never visited. Freelancers disappear after the third invoice. We work in the space between.
- Tested on
- 2GB Android
- Network floor
- 3G, intermittent
- Payments
- M-Pesa first
- Handover
- Full ownership
Built for African market realities
M-Pesa first, offline-tolerant, and tested on the mid-range Android phones and intermittent networks your customers actually use - not just on office fibre.
Design-first engineering
Interface design and architecture happen in the same room. You get a product that looks premium and holds up under load, not a pretty shell over fragile code.
Enterprise architecture, startup pace
Typed codebases, CI pipelines, monitoring and documented handover from day one - shipped in weeks, not quarters.
We stay after launch
Every build ships with a support window, uptime monitoring and a named engineer who already knows your system.
You own everything
Source code, cloud accounts, domains and design files are transferred to you at handover. No hostage licensing, no lock-in.
Transparent commercials
Published price ranges, fixed-scope quotes and weekly demos. You always know what is being built and what it costs.
Seven steps, and you see working software from week six
Every stage has a named deliverable you can hold us to, and a demo you can click.
- 01
Discovery
1 - 2 weeks
We learn how your business actually runs before proposing anything.
You get: Requirements document, process map and fixed-scope proposal
- 02
Planning
1 week
Architecture, milestones and a scope you can hold us to.
You get: Technical architecture, milestone plan and signed scope
- 03
Design
2 - 4 weeks
Interfaces designed and validated before a line of code is written.
You get: Design system, approved screens and clickable prototype
- 04
Development
4 - 16 weeks
Two-week sprints, each ending in something you can click.
You get: Working software on staging, demoed every two weeks
- 05
Testing
1 - 3 weeks
Tested on the devices and networks your users actually have.
You get: Test report, performance benchmarks and sign-off
- 06
Launch
1 week
Deployment, migration and training - with a rollback plan.
You get: Live system, trained team and operating manual
- 07
Support
Ongoing
90 days included, then a care plan if you want one.
You get: Monitoring, SLA response and a monthly health report
Discovery is a fixed-fee engagement of its own, and you keep the requirements document whether or not we build it. Start there.
We know your sector before the first meeting
All 10 industriesHealthcare
Records, billing and claims for clinics, hospitals and diagnostic labs - built around the clinician's workflow, not an accountant's model of it.
EMR platforms, Lab information systems, Pharmacy inventory
Real Estate
Property portals, virtual tours and lead qualification that bring enquiries to you directly instead of through a per-lead fee.
Listing portals, Virtual tour platforms, Tenant management
Logistics & Transport
Fleet tracking, dispatch and proof-of-delivery systems that turn a phone-call operation into a live board.
Fleet telematics, Dispatch platforms, Warehouse management
Retail & E-commerce
Storefronts, POS and inventory that share one stock number across the warehouse, the shop floor and the website.
E-commerce platforms, POS terminals, Inventory management
Fintech & Banking
Wallets, lending platforms and payment infrastructure with the ledger discipline and audit trail regulators expect.
Wallet platforms, Loan management, Payment gateways
Education
School management, e-learning and student systems that work on entry-level Android and survive without a data bundle.
LMS platforms, School ERP, Student portals
What clients say once it is live
“We went from losing orders every week to not losing any. The vendors onboard themselves now, which is the part I still cannot quite believe.”
“The fuel savings alone paid for the build in seven months. Now I can see every bike in the city from my phone.”
Peter Kamau, Rapid Logistics EA “Our claim rejection rate was the quiet thing bleeding us. Fixing documentation at the point of care fixed the revenue.”
Dr. Grace Wanjiru, Afya Health Group “They tested on the phones our students actually own. That one decision turned the whole product around.”
Faith Chebet, Shule EdTech “We stopped renting our own customers from listing portals. The site pays for itself every month in fees we no longer hand over.”
Samuel Otieno, Acacia Real Estate “Three vendors quoted us. Trenax was the only one who asked to sit with our clerks for a day before quoting. It showed in everything after.”
Esther Mwende, Mashamba Cooperative
Sample testimonials — replace with approved client quotes before launch.
Tools chosen so you can hire for them
We pick technology you can maintain after handover, not whatever is novel this quarter.
- Frontend
- Next.js, React, TailwindCSS
- Language
- TypeScript
- Mobile
- Flutter, React Native
- Backend
- Node.js, Supabase, Firebase
- Data
- PostgreSQL, Redis
- Infrastructure
- Docker, AWS, Vercel, Cloudflare
- Design
- Figma
The things clients ask before signing
If yours is not here, ask it directly - we answer plainly.
Discovery usually begins within one to two weeks of a signed proposal. If timing is critical, tell us on the first call - we occasionally have capacity sooner, and we would rather say so than let you wait.
Yes. We have delivered into Uganda, Tanzania and Rwanda, and work remotely with clients in Europe and the Middle East. Our team is Nairobi-based and we overlap comfortably with European hours.
Thirty minutes on your business, the problem you are solving and any constraints - budget, deadline, existing systems. You leave with an honest view of feasibility and a price band. No deck, no pressure.
Yes, entirely. The repository, cloud accounts, domains and design files are transferred to your organisation at handover. Nothing is licensed back to you and nothing is locked to us.
That works well. We frequently deliver design systems or specific modules that an in-house team continues, and we hand over with documentation written for exactly that. We can also review an existing codebase and tell you plainly what we find.
Often, yes. We begin with a paid assessment of the existing code and infrastructure, then tell you honestly whether continuing or rebuilding costs less. Sometimes the answer is that the current vendor should fix three specific things - we will say that too.
We sign an NDA before any sensitive material or system access changes hands. For due diligence and fintech work we operate under a mutual NDA from first contact.
Thirty to ninety days of support is included depending on engagement size, covering bug fixes, minor changes and uptime monitoring. After that a monthly care plan is optional - and you keep a named engineer who already knows your system.
What we have learned, written down
All insightsWhat a website actually costs in Kenya in 2026
Real price bands, what drives them, and the three questions that move a quote more than anything else on the brief.
18 August 20268 min
Your app is slow because you tested it on office WiFi
Offline-first architecture, install size discipline and the device testing habit that decides whether an African product retains users.
29 July 20269 min
When your spreadsheet becomes a business risk
The five signals that say it is time to move off Excel, and how to sequence an ERP build so it does not swallow a year.
11 July 20267 min
Tell us what is not working
Thirty minutes, no deck. You will leave with an honest read on feasibility, a price band and a timeline - whether or not you work with us.
We reply within one business day.

