Enterprise Software Development Company in London, built to ship.
Legacy systems do not get replaced overnight, and pretending otherwise is how migrations fail. We work as a build partner to modernize them in place, build custom ERP and CRM applications around how you actually operate, and connect siloed tools into one platform. The engineering rigor your compliance and security teams expect is the default, and we deliver inside your existing change management and review processes rather than around them. London (GMT, or BST in summer) sits 5.5 hours behind India (IST), which is the most convenient overlap of any major Western market because your morning is our afternoon and the two working days share a large chunk of live, productive hours.
London market
London is Europe's leading technology hub and ranked third globally in Startup Genome's 2025 ecosystem report, with UK tech raising 12 billion USD in the first nine months of 2025. Its fintech sector is the strongest in Europe and second only to the United States, which keeps demand high for custom software, payment platforms, dashboards and mobile apps. Geminate Solutions acts as the remote product and engineering arm for London founders and businesses that need to move quickly without overstretching local hiring budgets.
Local signal: The UK tech ecosystem recorded 12 billion USD in funding in the first nine months of 2025, with London's fintech sector confirmed as the number one fintech hub in Europe and second globally.
4.9★
Client rating across 24+ projects
250K+
daily active users on apps we built
10M+
requests per minute handled
50+
products shipped worldwide
The problem
The new system works. Nobody uses it.
Enterprise rollouts fail at the seam, not the centre. The replacement is better than the legacy tool in isolation and worse at the three things a team does forty times a day, so people keep a spreadsheet alongside it. Integration with the systems of record is usually the part that was scoped last.
You pay for the migration and keep the old process, which is the most expensive outcome available.
What we build
Enterprise Software Development for London teams, end to end
Legacy modernization using the strangler fig pattern with incremental, zero-downtime migration
System integration across ERP, CRM, and HRM through APIs, message queues, and event-driven architecture
Custom ERP and CRM applications built around your actual workflows, approval chains, and audit trails
Workflow automation with configurable approvals, notifications, escalations, and SLA tracking
Data and reporting platforms covering data warehouse, ETL pipelines, and executive dashboards
Security and compliance foundations with RBAC, SSO and SAML, encryption, and full audit logging
Your time zone
London (GMT, or BST in summer) sits 5.5 hours behind India (IST), which is the most convenient overlap of any major Western market because your morning is our afternoon and the two working days share a large chunk of live, productive hours.
Your IP, your code
You retain full IP ownership, we sign an NDA up front, and our English-fluent team is set up to work to UK contract and GDPR expectations so London clients can offshore with confidence.
Priced in GBP
Transparent, milestone-based, scoped on a free call. No hidden costs and no lock-in.
London specifics
What changes when this is built for London
London enterprise work is dominated by financial services, so supplier assurance, penetration test evidence and a data processing agreement arrive before the contract rather than after. Legacy integration here often means a mainframe or a decades-old policy system, and the discovery pass against real data is where the estimate is won or lost.
Enterprise
The decisions enterprise software development actually turns on
Software that has to live inside an organisation that already exists.
Identity is theirs, not yours
SSO through SAML or OIDC, group membership driving permission, and deprovisioning that actually removes access on the day someone leaves. Building your own account system for an enterprise buyer guarantees a rebuild during the security review.
The legacy system is not going away
There is a system of record older than the team maintaining it, and the new product has to read from it, write to it, or both. Its data will be inconsistent in ways nobody documented, and a discovery pass against real data belongs before the estimate, not after.
Rollout is change management wearing a technical hat
Pilot group, training, a support path and a rollback plan. Enterprise projects fail on adoption far more often than on code, and the deployment plan carries as much risk as the build.
Audit and retention are contractual
Who changed what, when, and the ability to produce that on request years later. Retention schedules and legal hold are requirements, and they shape the data model rather than sitting beside it.
Building in London
What is actually different about enterprise software development for a London client
Working overlap
3.5 hours a day
Five and a half hours behind Surat in winter, four and a half in summer. The overlap is our afternoon and their morning, roughly 14:00 to 17:30 IST. That is enough for a daily call and not enough for continuous pairing, so the working agreement has to be written down rather than assumed.
How buying works here
London buyers ask for references before they ask for a proposal, and financial services buyers will run a supplier assurance process that is longer than the build. Fintech and regulated work carry that overhead by default.
Procurement
Expect a security questionnaire, proof of insurance, and possibly a penetration test report. Budget the calendar for it.
Where the data can live
AWS eu-west-2, Azure UK South and Google europe-west2 all sit in London. Since Brexit the region choice carries a second meaning: EU customer data in a London region is a transfer, not a domestic hop, and a client with European users will ask which region before they ask about the roadmap.
Working week
Monday to Friday. The overlap is our afternoon and their morning, roughly 14:00 to 17:30 IST, which is one good call a day and not continuous pairing.
Compliance in United Kingdom
How does Enterprise Software Development stay compliant with UK GDPR in London?
London companies build under the UK GDPR and the Data Protection Act 2018, overseen by the Information Commissioner's Office (ICO). We design every enterprise engagement to respect those rules from day one, not as a checklist bolted on at the end. Moving personal data from the UK to India relies on safeguards such as the International Data Transfer Agreement, which we put in place so your processing stays lawful end to end.
Who regulates you
the Information Commissioner's Office (ICO). the FCA layers extra operational-resilience and outsourcing expectations on financial services, which we design around for regulated clients.
Where your data lives
You pick the hosting region. When residency rules or a United Kingdom contract require it, we deploy inside your jurisdiction and you hold the cloud accounts.
What you own
100% of the source code and IP, transferred under contract, with an NDA and a data processing agreement signed before anything is shared.
Proof we can do this at scale: the products we have shipped run at 250K+ daily active users and have handled 10M+ requests per minute, across 50+ products rated 4.9 stars over 24+ client projects. Security and data handling are part of how we build, not an afterthought.
FAQ
Enterprise Software Development in London, answered
How do you migrate legacy systems without disrupting operations?
Can your enterprise software development team work within our compliance framework?
What if we need to integrate systems that have no modern API?
How much of the working day do London and India actually share?
Is offshore development with Geminate Solutions more cost-effective than a London agency?
How do you handle UK GDPR and data protection for London clients?
Where will our data and code be hosted if we build with you from London?
How much does Enterprise Software Development cost in London?
Do we own the code?
How long does it take?
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