Software & Apps.
Bespoke software is what you build when the off-the-shelf tools have run out of room: when your process will not fit inside someone else's product, or when three systems that ought to talk to each other simply do not. Molo is a London full stack development agency building custom platforms, customer portals, internal tools, CRM systems and the integrations that connect them. We work with businesses whose operations have outgrown spreadsheets and plug-ins, and who would rather own the software they depend on than rent it indefinitely.
- Discipline
- Software & Apps
- Studio
- London
- Engagements
- Project · Retainer
- Brands served
- 200+
How we work
Custom platforms, dashboards, and mobile apps.
The honest answer to "should we build this?" is usually no. If Shopify, HubSpot, Xero or a project tool already does eighty per cent of what you need, and the remaining twenty per cent is preference rather than advantage, buy the licence and get on with running the business. Building earns its cost when the gap is structural: when your pricing model, approval chain or product logic cannot be expressed inside someone else's data model, when per-seat licence costs scale faster than your margin, or when the thing you do differently from competitors is precisely the thing customers are paying for.
Circle Of Life is a clear example of the second case. Subscription commerce looks like ordinary ecommerce until you look closely at it: weekly delivery windows, plan tiers, pauses, skips, reactivations, dietary swaps mid-cycle, and billing that has to remain correct through every one of those events. We engineered the subscription engine as a product in its own right rather than stretching a generic recurring-payment plug-in across a standard store, and built recurring checkout, customer accounts and self-service order management as first-class flows. The practical benefit is that adding a plan tier or a delivery window is a configuration change rather than a development ticket.
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CRM work is where a lot of this begins. Occasionally that means a bespoke CRM, because a sales process genuinely does not fit a pipeline of fixed stages or because the record you need to track is a project, a property or a survey rather than a deal. More often it means integration: connecting HubSpot, Salesforce, Pipedrive or a Microsoft stack to the website, the quoting tool, the accounts system and the fulfilment side, so an enquiry captured on a form arrives complete and a status change in one system is not re-keyed into two others. We build the field mapping, the sync logic, the error handling and the retry behaviour that decide whether an integration is dependable or a quiet source of missing data.
Data modelling is the decision that outlives everything else in a build. Interfaces get redesigned, frameworks get replaced, teams change, and the schema stays. So we spend real time early establishing what the core entities are, how they relate, what has to remain auditable, and which relationships are likely to change as the business grows. The expensive rewrites we are asked to rescue are almost always the ones where a business concept was flattened into a field it did not fit, and every feature built afterwards inherited the compromise.
Our engineering covers the full stack: React and Next.js on the front end, typed Node and Python services behind them, PostgreSQL and modern cloud infrastructure underneath, with the same design discipline we apply to marketing sites. The breadth matters mainly because it removes hand-offs, since the person modelling the data sits with the person designing the screen. For Glass Openings that meant a browser-based 3D configurator spanning over 120 products, each supporting more than 70 materials, over 30 glass variations and live dimensional controls, which is the kind of scope where front end and back end have to be designed as a single system rather than negotiated across a contract boundary.
You own the code. That is a contractual position rather than a favour: source in your repositories, infrastructure in your cloud accounts, credentials in your name, and no proprietary layer that only we are able to maintain. We write documentation as we go, covering architecture notes, environment setup, deployment runbooks and the reasoning behind significant decisions, and we run a live handover with your team or your next developer rather than sending a zip file and an invoice. An agency that makes leaving difficult has told you something useful about its confidence in the work.
Software has a running cost, and budgeting only for the build is the most common way these projects go wrong. Dependencies need updating, security patches need applying, hosting and third-party APIs bill every month, and the business changes in ways the original scope never anticipated. The sensible approach is to plan for continued investment after launch rather than treating the go-live date as the finish line, and to weigh a build against several years of licence fees rather than against a single year. We offer ongoing support retainers, and we are equally content to hand a well-documented codebase to an in-house team and step back.
Capabilities
Everything you need under one roof.
Each engagement is shaped around the outcome you’re hiring us for. Below is the full toolkit our team brings to software & apps engagements.
- Custom web application development
- Full stack development (React, Next.js, Node, Python)
- Bespoke CRM design & build
- CRM implementation & data migration
- System, API & third-party integration
- Website to CRM integrations
- Data modelling & database architecture
- Customer portals & self-service accounts
- Internal tools & operations dashboards
- Subscription & recurring commerce platforms
- iOS and Android applications
- Legacy system replacement & code audits
- Cloud infrastructure, CI/CD & monitoring
- Documentation, handover & support retainers
Our Process
A clear path from brief to launch.
We’ve refined this process across hundreds of engagements. It scales from a four-week sprint to a multi-year partnership without losing momentum.
Scope
Workshops with the people who will actually use the software, mapped against the process it has to support. We pressure-test whether building is the right answer at all, then define the smallest first version that delivers real value.
Architect
Data model, integrations, authentication, permissions, hosting and security agreed before code is written. This is where we decide what the system needs to do in three years, not only what it must do at launch.
Design
User flows, interface design and working prototypes reviewed with the people who will live in the product daily. Accessibility, permissions and mobile behaviour are designed in rather than retrofitted later.
Build
Iterative delivery in short cycles, each ending in software you can actually use. Automated testing, code review, CI/CD pipelines and QA run throughout, with documentation written alongside the code rather than after it.
Operate
Launch, monitoring, error tracking and support. From there it becomes either an ongoing partnership or a documented handover to your own team. Your choice, and the code belongs to you in either case.
Outcomes
Proof, in the only currency that matters.
Faster operational workflows
Uptime across deployed platforms
Average client review on Clutch
Related work
Software & Apps in practice.
FAQ
Common questions.
Don’t see your question? Email info@molo.agency and we’ll come back within one working day.
Should I build a custom CRM or use HubSpot?
Use HubSpot, Salesforce or Pipedrive unless you have a specific reason not to. They are mature, supported and far cheaper than building. A custom CRM makes sense when your process genuinely does not fit fixed pipeline stages, when the record you track is a project or property rather than a deal, or when per-seat costs outgrow the value. Most businesses need integration work, not a replacement.
How much does a custom web application cost?
It depends almost entirely on scope, and any agency quoting before understanding yours is guessing. The main cost drivers are the number of distinct user roles, how many external systems you integrate with, how complex the business logic is, whether you need mobile apps as well as web, and your compliance requirements. We scope properly and quote against a defined first version rather than an open-ended wish list.
Who owns the code you write?
You do, outright and in writing. The source lives in your repositories, the infrastructure runs in your cloud accounts, and the credentials are in your name. There is no proprietary framework or hosting arrangement that ties you to us. If you later move the work in-house or to another agency, everything transfers with documentation attached.
What does a full stack development agency do?
A full stack agency handles both halves of an application: the interface users see and the servers, databases, APIs and infrastructure behind it. The advantage is that one team owns the whole system, so decisions about data structure and interface design are made together rather than negotiated across a contract boundary between separate suppliers.
How long does it take to build a custom platform?
Scope drives the timeline more than anything else. A focused internal tool or portal can reach a usable first version in a matter of weeks, while a full commercial platform with integrations, billing and multiple user roles takes months. We deliver iteratively, so you see working software throughout rather than waiting until the end to find out what was built.
Can you integrate our website with our CRM and other systems?
Yes, and it is some of our most requested work. We connect websites, quoting tools, accounting systems, fulfilment platforms and CRMs so data flows automatically instead of being re-typed. The important part is the unglamorous engineering underneath: field mapping, sync rules, error handling and retries, so the integration stays reliable rather than failing silently.
Can you take over an existing codebase?
Yes. We start with a code and architecture audit covering dependencies, test coverage, security posture and the decisions that will constrain future work. That produces a stabilisation and growth plan you can read and challenge, and only then do we write new code. Inheriting a codebase without understanding it first is how technical debt gets compounded.
What happens after launch, and do we need a maintenance contract?
Something is always needed after launch, though it need not come from us. Dependencies require updates, security patches need applying, and the business will ask for changes the original scope never covered. We offer support retainers covering monitoring, patching and continued development, and we are equally happy handing a documented codebase to an in-house team.
Do you sign NDAs and work with sensitive data?
Yes. We routinely sign mutual NDAs before commercial discussions begin, and we follow GDPR-aligned practices around data handling, access control, encryption and retention. Where a client operates under stricter internal or sector requirements, we work to those standards and document how the system meets them.
What technologies do you build with?
Mainly React and Next.js on the front end, typed Node and Python services on the back end, PostgreSQL for relational data, and modern cloud infrastructure with CI/CD and monitoring. We choose established, well-supported tools deliberately, because the point is software your team or your next developer can maintain without specialist knowledge.
Let’s discuss a project.
Tell us about your business, your ambition, and your timing. We’ll come back within one working day with the right shape of partnership for what you’re trying to build.
- info@molo.agency
- Phone
- +44 207 255 2221
- Studio
- 1st Floor Woodgate Studios, 2-8 Games Road
Cockfosters EN4 9HN
United Kingdom