React NativeAndroidMobile App
2025
Consumer mobile · Google Play
RekBook
Cross-platform booking and operations app shipped to Google Play with native-feeling UX, offline-tolerant flows, and production release tooling.
Google Play
Platform
Open·Now booking new projects
Engineering the next era of intelligent software.
We help US founders ship AI-native products with confidence — senior engineers, weekly delivery, USD milestones, and software built to win in competitive markets.
Verified on
120+
Products shipped
38
AI systems live
US
Primary market
4.9
Avg. client score
What we build
A studio that ships the hardest 5% of your roadmap.
From SaaS platforms to production AI systems, our senior team delivers focused, high-quality work - with direct access to the people building your product.
Get in touch
Tell us where you're stuck?
Whether you are exploring AI, automation, modernization, or operational improvements, we help teams identify practical next steps that create real business impact.
- AI & automation
- Software modernization
- SaaS platforms
- Operational improvements
Project inquiry
Share a few details below - no need to visit the contact page. We reply within 24 hours.
AI you can actually deploy
AI that ships,
not AI that demos.
We engineer production AI systems with retrieval, evals, guardrails, and observability - so the model you launch is the model you trust.
- Multi-agent orchestration
- RAG with eval harness
- Model routing & fallback
- PII redaction & guardrails
- Fine-tuning & LoRA
- On-prem deployment
nexum.ai/agent
v1.4 · production
Prompt
Response · Risk summary
thinking…- LiabilityClause 14.2 caps liability at fees paid - non-standard for enterprise.
- Auto-renewRenewal opt-out window is 7 days; recommend negotiating to 30.
- IPBackground IP retained; foreground IP transfers on full payment.
Selected work
Products people stay obsessed with.
A selection of recent work. Every engagement is an exercise in obsession, craft, and measurable impact.
FintechPaymentsWalletSaaS
2025
Nigerian Fintech Platform
Multi-gateway fintech platform with digital wallet, token sales module, and multi-level referral engine — built for regulated money movement and growth mechanics.
5 integrated
Gateways
RAGAI AgentsCustomer Support
2025
AI Avatar Support Agent
RAG-powered customer support agent with branded AI avatar experience, built on Anam AI's platform and wired to the client's knowledge base.
RAG-grounded
Knowledge
Why Nexum
The premium standard
for AI-native software.
We exist because the gap between great design and great engineering is too big. We close it - every project, every detail.
120+
Products shipped
38
AI systems live
70%
Retention rate
4.9/5
Avg. NPS
Founder-led teams
Every project is led by a senior - never offshored to juniors. The people you meet are the people who ship.
Weekly velocity
We demo working software every Friday. No multi-month silence, no slide-only updates.
Production-grade
Security, observability, evals, and uptime - built in from day one, not retrofitted at the end.
Speed without shortcuts
We move faster than most agencies because our craft, taste, and tools compound. Quality is the speedup.
Awwwards-level craft
Pixel-perfect interfaces, motion-rich UX, and copy that earns clicks.
Long-term partner
70% of clients renew. We stay embedded as you scale - strategy, design, engineering, AI.
Client reviews
66+ five-star reviews.
Trusted on Fiverr & Upwork.
Every review is from a real client - 5.0 stars across Fiverr and Upwork.
“I can give 6 stars to Muhammad I would. He delivered excellent work and communication was always at best. Muhammad is highly skilled and communicated in English very well. Since coming to Fiverr he is by far the best developer I have hired. Definitely recommended for all kinds of PHP work whether simple or complex.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Muhammad Anas delivered exceptional work, showcasing his professionalism and attention to detail. His language fluency and willingness to go above and beyond made the entire experience seamless and enjoyable. Great work as always! Pleasure to work with!”
P
Prolam
Repeat client · United States
“He did an awesome job as always and he went above and beyond to resolve the issues.”
RU
Rigers Uta
Repeat client · Albania
“Amazing! Fantastic work great delivery +++++”
I
Impevia
Sweden
“The work delivered was truly exceptional, showcasing mastery in the craft. The code was flawless, contributing significantly to the growth of my business. I would undoubtedly give it a 10/10 rating and would not hesitate to place another order.”
MA
Mohamad Aloma
Germany
“The developer solved the issue in a very fast way, and all the things work very well and very stable. I tested the function many times, and it didn't get any errors again. Hope to cooperate again.”
SC
Sarah Councell
Thailand
“He is a backend genius, unmatched problem-solving skills and elegant code.”
FU
Faizan Ur Rehman
Pakistan
“I just enjoyed working with Anas. He is so experienced and professional. His communication skills are amazing. He also works very hard and fast. He always delivered quality work.”
E
ExamSC
European Union
“I'm very happy with Anas's work on my project. He was professional, understood my requirements well, and delivered a high-quality solution. His attention to detail and responsiveness were impressive.”
DD
Davion Da Costa
United States
“Another great experience with Muhammad. I highly recommend him for any dev work, in any tech stack you may have. He goes above and beyond to find solutions even after delivery.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Muhammad delivered good work on this PHP project and I enjoyed working with him. His communication is always top-notch and his skills are strong. I will most definitely have additional work for him.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Absolute pleasure to work with. Always up to the task with proficiency and within budget. I enjoyed working with Muhammad and will definitely have additional work for him in the future.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Muhammad has delivered excellent work once more. I enjoyed working with him and will no doubt have additional jobs for him in the future.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Always gets the work done to satisfaction and high quality. I will never stop recommending Muhammad. He is a pleasure to work with and a very nice and genuine person.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Muhammad is hands down the best Laravel developer on Upwork. He completes all tasks without issues and advises accordingly.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“Awesome work done by Muhammad as usual.”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
“SOOOO GOOD”
DJ
David J.
Repeat client · Saint Vincent and the Grenadines
Our focus market
Built for founders in the United States.
We partner with US startups and product teams that need senior engineering without agency overhead — overlapping US timezones, USD milestones, and weekly demos from discovery through launch.
Frequently asked
Answers to the
questions worth asking.
Don't see what you need? Email hello@nexumbuilds.com - we reply within 24 hours.
- We're a focused studio, not a big agency. You work directly with the people building your product - weekly demos, clear communication, and no layers of account managers.
Ready when you are
Your next big launch
starts here.
Book a free 30 minutes discovery call - we'll map your idea, timeline, and the fastest path to ship.
Times are shown in your local timezone. We're remote-first and timezone-flexible - pick any slot that works for you.