A senior developer without the London agency rates
For many UK startups and SMEs, hiring a senior developer in-house is slow and expensive, and agencies add layers of management. A nearshore freelance developer gives you direct access to senior engineering: the person on the call is the person who builds and maintains your product.
With a 2–3 hour time difference, your morning overlaps with my afternoon. Feedback given before lunch in London is usually implemented the same day.
What UK clients typically need
MVPs for startups, iOS and Android apps with a secure backend, customer and partner portals, booking and ordering systems, internal tools that replace spreadsheets, and integrations with payment providers, CRMs and accounting software.
I also take over existing codebases: review, stabilise, document and continue development — often the fastest way to get a stalled project moving again.
Fintech and trading experience
I built Number One Trading, an analytics platform used by around 300 traders, and have worked on crypto exchange API integrations and automated trading infrastructure. That experience covers real-time data, security and the reliability expectations of financial products.
Why UK businesses work with me
One accountable developer
You talk to the person who writes the code. No account managers, no hand-offs between sales and a hidden offshore team.
Full stack, end to end
iOS & Android apps, web platforms, backends, APIs, ERP modules and hardware/IoT — designed, built, deployed and maintained by the same engineer.
Staged delivery
Work is split into milestones you can test. You approve each stage before the next one starts, so budget and scope stay under control.
Source code ownership
The code, repositories and accounts are yours. Documentation and handover are part of the job, not an extra.
Async-friendly communication
Written updates in English, a shared task list, and short video calls when a decision needs to be made together.
Long-term maintenance
18 years in the field means many systems I built are still running years later. Post-launch support is planned from day one.
Agency, off-the-shelf package or freelance expert?
See at a glance which model delivers the most value for the same budget.
| Criteria | Software Agency | Off-the-shelf / SaaS | Hakan Sevimoğlu |
|---|---|---|---|
| Point of contact | Sales + project manager + team | Support line | The expert who writes the code |
| Cost structure | Office, sales and management layers are priced in | Per-user / monthly license, forever | Development work only |
| Fit to your business | Scope changes need extra contracts | ✕ You adapt to the package | ✓ Software adapts to you |
| Response time | Tickets, meetings, approval chains | Queued | ✓ Direct WhatsApp / phone |
| Technical depth | Depends on who is on the team | Limited customization | ✓ 18 years, every layer from mobile to IoT |
| Maintenance | Knowledge is lost when the team changes | Data risk if the product shuts down | ✓ Supported by the person who built it |
Technologies I use
Example projects
A selection of live projects serving real users.
Number One Trading — Trader Analysis Platform
Live charts, analysis sharing and signal tracking for BIST and crypto.
View
Crypto Trading API Integration
Automated trading infrastructure using exchange APIs.
View
Ganicus AI — An AI Employee for Sales Teams
B2B lead finding, map scanning, buying signals, lead scoring, CRM integration and personalized messages in 80+ languages.
View
Kassa — iPhone POS & Inventory App
Barcode sales, stock, customer credit and profit reports for grocery stores and kiosks; works offline.
View
iPhone Security Scan — Spyware Detection
iOS app that scans for state-grade spyware, hidden tracking apps and jailbreak traces.
View
ucakbiletcisi.com — Online Flight Booking Platform
Flight search with BiletBank integration, 3D Secure payment, real bank installments, PNR lookup and online check-in.
ViewHow we work
Free intro call
We clarify needs, existing systems and goals together.
Quote & roadmap
Scope, technology, timeline and budget within 24 hours.
Staged development
Weekly demos and a live test environment.
Launch & support
Go-live, training and ongoing maintenance.
Free pre-analysisThe first meeting and roadmap are completely free, with no obligation.
Staged delivery and approvalYou review each module on a test environment before we move on.
Written scope and rightsScope, delivery and source code rights are defined in the contract.
Frequently asked questions
What is the time difference between the UK and Turkey?
Turkey is on UTC+3 all year. The UK is UTC+0 in winter and UTC+1 in summer, so Turkey is 3 hours ahead in winter and 2 hours ahead in summer.
Can I hire you as a contractor for my UK company?
Yes. I work on a project or retainer basis as an independent contractor; scope, milestones and payment terms are agreed in a written contract.
Do you build apps for the App Store and Google Play?
Yes. Native iOS apps in Swift/SwiftUI and Android apps, including store submission and review handling.
Can you take over a project another developer started?
Yes. I begin with a code and infrastructure review, list the risks, and then continue development in safe, tested steps.
Who owns the code?
You do. Repositories, accounts and infrastructure are under your ownership or transferred at handover.
How do we start?
Send a short description via WhatsApp or the quote form for a free pre-analysis call and a written proposal.