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Digital product engineering · since day one, senior only

Products,engineeredto last.

We design, engineer and scale digital products for startups and enterprises. 100+ senior engineers, honest scoping, code you own.

4.8 ★ Google · 138 reviewsAWS · Azure · Google Cloud certified
AirwallexZellerKoganHotDocFyndGraphyTestbookTeachmintLearnosityEka CareSkydoLunarSnitchOnBuyStockGroMILKRUN
Chapter 00 — Mariox

Weareaseniorengineeringteamthatdesigns,buildsandscalesdigitalproducts.Westayafterlaunch,andeverythingwebuildbelongstoyou.

100+
Engineers
300+
Products shipped
10+
Industries served
4
Countries, one team
Chapter 01 — Work

Five products, opened up.

What the business needed, the system underneath it, and the stack that runs it today.

Skydo product screen
Fintech01 / 05

Skydo

Cross-border payments for exporters, built around a ledger that has to reconcile to the cent.

The system

The ledger is the source of truth and everything else reads from it. Payment rails sit behind a normalisation layer, so an API change upstream stays contained.

Stack · App + web + admin
ReactNode.jsPostgreSQLRedisAWS
MILKRUN product screen
Quick commerce02 / 05

MILKRUN

Grocery delivery with rider dispatch and live tracking, engineered for a sub-ten-minute promise.

The system

Store-level inventory is the source of truth, and the product refuses to show a delivery slot the system cannot back.

Stack · App + web + admin
React NativeNode.jsKafkaKubernetesMaps APIs
Graphy product screen
Creator SaaS03 / 05

Graphy

Course delivery, live cohorts and creator payouts, where every creator runs their own branded school.

The system

Live sessions and course delivery are separate services, so a spike in one cannot degrade the other. Payouts derive from immutable event records.

Stack · App + web
ReactReact NativeNode.jsWebRTCGCP
Airwallex product screen
Fintech04 / 05

Airwallex

Global business accounts and FX: interfaces and services for money moving across borders.

The system

Every balance is derived from an append-only record rather than stored and mutated, so history can be rebuilt at any point.

Stack · App + web
TypeScriptJava / SpringKafkaAWSTerraform
Snitch product screen
E-commerce05 / 05

Snitch

Fashion commerce that survives a drop. Storefront, ordering and operations tuned for peak traffic.

The system

One inventory service feeds every surface, so the storefront cannot promise stock the warehouse does not hold.

Stack · App + web + admin
Next.jsNode.jsElasticsearchRedisCloudflare
Case index

Every product, on the record.

A working index of products we have engineered. Filter by sector, hover for a look.

01AirwallexFintechApp + web02ZellerFintechApp + web03SkydoFintechApp + web + admin04FampayFintechApp + web + admin05StockGroFintechApp + web06SoldoFintechApp + web07YonderFintechApp + web08LunarDigital bankingApp + web09GraphyEdtechApp + web10TestbookEdtechApp + web11TeachmintEdtechApp + web12LearnosityEdtechWeb13Cluey LearningEdtechApp + web14Seneca LearningEdtechApp + web15SunstoneEdtechApp + web16SnitchE-commerceApp + web + admin17FyndCommerce technologyApp + web + admin18JayporeLifestyle e-commerceApp + web + admin19KoganMarketplaceMarketplace + web + admin20OnBuyMarketplaceMarketplace + web + admin21OnceitE-commerceApp + web + admin22MILKRUNQuick commerceApp + web + admin23ZupitQuick commerceApp + web + admin24VolyQuick commerceApp + web + admin25GrokartGrocery, quick commerceApp + web + admin26HotDocHealthcareApp + web27Eka CareHealthcareApp + web
Open the full archive →
Chapter 02 — Services

Four disciplines. One team.

The people who plan a product and the people who ship it sit in the same room, so nothing gets lost in the handover.

01

Strategy

We start by finding the version of the product that is worth building, then price it honestly.

Product discoveryTechnical auditsRoadmaps & estimates
02

Design

Research, flows and interface systems delivered as design your engineers can actually build.

UX researchInterface designDesign systems
03

Engineering

Senior people writing production code from week one. No juniors hidden behind an account manager.

Web & mobile appsSaaS platformsCRM & ERPAI & automation
04

Scale

The infrastructure, monitoring and support to keep it running long after launch week.

Cloud & DevOpsQA & testingManaged supportDedicated teams

Seventeen services. Pick one, or all.

Hover to explore
Fynd product screen
Service 01

Custom software development

Bespoke platforms and internal systems built around your process, with architecture any engineer can pick up.

ArchitectureBuildHandover docs
From our work · FyndDiscuss this →
Chapter 03 — AI

AI that ships inside the product.

Not demos. Copilots, agents and automation connected to your data, evaluated before launch and monitored after it.

OpenAIAnthropic ClaudeLlamaLangChainpgvectorEvals & monitoring
01

Agents & copilots

Assistants that act inside your product: drafting, searching, filing and following up.

e.g. support replies, sales follow-ups
02

Search over your data

Retrieval systems that answer from your documents and databases, with sources shown.

e.g. policy search, product knowledge
03

Workflow automation

Documents read, classified and routed without anyone copying fields between systems.

e.g. invoices, KYC, claims
04

Prediction & scoring

Demand forecasts, lead scores and risk flags built on the data you already hold.

e.g. churn, demand, fraud
Chapter 04 — Technology

A stack chosen for the problem.

Proven technology where reliability matters, newer tools where they earn their place.

ReactNext.jsVueAngularTypeScript
Chapter 05 — Industries

Ten industries. Real clients in each.

We know the workflows, regulation and peak-traffic problems behind the sectors where software matters most.

01↗

Healthcare

Patient platforms, telemedicine, booking

HotDoc · Eka Care
02↗

Fintech

Payments, wallets, banking, investing

Airwallex · Zeller · Skydo
03↗

Education

LMS, assessment, school ERP

Graphy · Testbook · Teachmint
04↗

E-commerce

Marketplaces, storefronts, seller tools

Snitch · Kogan · OnBuy
05↗

Logistics

Fleet, dispatch, live tracking

MILKRUN · Voly
06↗

Startups

MVPs, SaaS, scale-up engineering

Zupit · Grokart
07↗

Enterprise

ERP, CRM, integrations

Fynd
08↗

Real Estate

Property platforms, CRM, marketplaces

09↗

Travel

Booking, concierge, hotel technology

10↗

Media

OTT, streaming, creator platforms

Not listed?↗

Your industry? Talk to us.

The engineering problems repeat across sectors: payments, scheduling, inventory, compliance, scale. Tell us yours.

Chapter 06 — Process

Idea to scale.

01

■ Discover

Workshops, research and a technical audit of what already exists.

You get · Findings report
02

■ Define

Scope, architecture and a fixed number you can plan around.

You get · Fixed estimate
03

■ Design

Flows and interfaces tested with users before they are built.

You get · Clickable prototype
04

■ Build

Two-week sprints with a working demo at the end of each.

You get · Demo every sprint
05

■ Launch

Staged rollout, with monitoring live before the first user arrives.

You get · Production release
06

■ Scale

Support, iteration and capacity that grows with you.

You get · SLA-backed support
Chapter 07 — Ways to work

Three ways to start.

Choose the model that fits the stage you are at. Many clients start with a fixed scope and move to a dedicated team.

01

Fixed-scope project

A defined outcome, a fixed price and a delivery date, agreed after discovery.

Best for · MVPs and well-understood builds
02

Dedicated team

A cross-functional squad that works only on your product, led by a Mariox delivery lead.

Best for · Ongoing product development
03

Staff augmentation

Senior engineers added to your team, working in your tools and your process.

Best for · Filling skill gaps fast
Chapter 08 — Proof

Certified, reviewed, retained.

The people in the pitch are the people who write the code, and everything they build belongs to you.

Google reviews
4.8
★★★★★ from 138 verified reviews
Cloud
AWS
Certified engineers
Cloud
Microsoft Azure
Certified engineers
Cloud
Google Cloud
Certified engineers
Ownership
Your code
Repos and infra are yours
Confidential
NDA first
Before the first call
Reach
4 countries
One delivery team
Engineering partner to
Airwallex
Zeller
Kogan
HotDoc
Fynd
Graphy
Testbook
Teachmint
Learnosity
Eka Care
Skydo
Lunar
Snitch
OnBuy
StockGro
MILKRUN

Before we talk.

Fixed scope for well-defined builds, monthly for dedicated teams. Every estimate follows a short discovery, so the number holds.

Chapter 09 — Start

Have an idea worth building?

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