Fintech scale-ups
You have found product–market fit. Now the app, the architecture and the team have to scale with your customers and your regulator, without slowing releases.
Independent engineering consultancy · Remote, UK & Europe
iOS and fintech engineering for products where every tap moves money.
BitShift Consulting helps fintech scale-ups, trading platforms and enterprise product teams ship reliable iOS apps, design systems that hold up under peak load and audit, and adopt GenAI without the hype.
01 / Who we help
Built for fintech, trading and enterprise product teams
When money, market data or customer trust sit at the centre of your product, the cost of a wrong technical call is high. That is the work we do.
Trading platforms
Live prices, fast order entry and trust are the product. Your iOS app has to stay precise and responsive at market open, on every device.
Enterprise product teams
You need senior iOS capability or an independent architecture view quickly, with the judgement to fit your standards and without adding permanent headcount.
02 / Services
Consulting services for iOS and fintech teams
Engage us for one service or combine them. Every engagement is led by a senior consultant who stays hands-on from first call to handover.
01
iOS engineering
Native apps that are fast, accessible and safe to change.
Senior Swift engineers who can join your team, lead a new build or untangle a codebase that has slowed everyone down.
- New iOS apps in Swift and SwiftUI
- Objective-C to Swift and UIKit to SwiftUI migration
- Modular architecture, automated testing and CI/CD release pipelines
- Performance, crash-rate and accessibility improvements
02
Fintech architecture
Systems that stay correct under peak load, audits and change.
Independent architecture for payments, banking and trading products, from a focused review to hands-on design with your engineers.
- Real-time market data and order flows for trading apps
- Payment and transaction pipelines built for idempotency and auditability
- Strong customer authentication, security and data protection by design
- Resilience, observability and incident readiness
03
GenAI adoption
AI features and workflows that earn their place in production.
We help you choose the use cases worth building, prove them quickly and ship them with the controls a regulated business needs.
- Use-case discovery with clear success measures
- LLM features such as retrieval, summarisation and assistants, in-app or on-device
- AI-assisted engineering workflows for your development team
- Evaluation, guardrails, data privacy and governance
04
Technical leadership
Senior judgement at the table, without a permanent hire.
Fractional CTO and Head of Mobile support for teams that need direction, structure and someone accountable for the technical plan.
- Fractional CTO or Head of Mobile
- Architecture governance and technical roadmaps
- Hiring, team structure and engineering practices
- Technical due diligence for investors and acquirers
03 / Typical projects
Typical projects
The kinds of problems we are brought in to solve and how we approach them. These are illustrative examples, not specific client stories.
Trading platforms · iOS engineering
Modernising a trading app without a feature freeze
- Situation
- A mature iOS trading app with a large Objective-C and UIKit codebase, slow releases and rising crash rates at market open.
- Our approach
- Audit the codebase and release pipeline, set up modular boundaries and automated tests, then migrate screen by screen to Swift and SwiftUI while features keep shipping.
- The aim
- Faster, more predictable releases, an app that stays stable under peak load and a codebase new engineers can work in.
Payments · Fintech architecture
An architecture review before payments scale
- Situation
- A fintech scale-up preparing for a new market or product line, with payment flows that grew quickly and now carry audit and reliability risk.
- Our approach
- An independent review of transaction flows, idempotency, reconciliation, authentication and observability, followed by a prioritised roadmap.
- The aim
- Confidence that the platform stays correct under growth and scrutiny, and a plan your own team can carry out.
Enterprise · GenAI adoption
From GenAI ideas to a production pilot
- Situation
- A product or engineering team with plenty of GenAI ideas, pressure to ship something and real concerns about data, cost and quality.
- Our approach
- Shortlist use cases against clear success measures, prototype the strongest, evaluate it against your own data and put guardrails and governance in place.
- The aim
- One GenAI feature or workflow in production that measurably earns its place, and a repeatable way to evaluate the next.
04 / Stack
Technology we work with
The languages, frameworks and integrations we use day to day on iOS and fintech products.
Languages
Apple platforms
Integrations
Delivery
05 / Approach
How engagements work
Clear scope, visible progress and a clean handover, whether you need two weeks of advice or a year of delivery.
-
Discovery call
A short, no-obligation conversation about your product, constraints and timeline. You get a straight answer on whether we are the right fit.
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Proposal
A written scope with deliverables, timeline and commercial terms, so everyone agrees what “done” means before work starts.
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Delivery
We work in your tools and rituals, report progress in writing every week and put working software or decisions in front of you early.
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Handover
Documentation, knowledge transfer and a codebase your team can confidently own after we step back.
Ways to engage
Advisory
Architecture reviews, technical due diligence and GenAI readiness assessments. Fixed scope, clear written recommendations.
Embedded delivery
Senior engineers inside your team for iOS builds, modernisation and fintech platform work.
Fractional leadership
Ongoing CTO or Head of Mobile support for a set number of days each month.
06 / About
About BitShift Consulting
BitShift Consulting is an independent engineering consultancy for fintech and product companies. We pair hands-on iOS engineering with architecture and leadership experience, so decisions about money, data and customer trust are made by people who will live with the code.
Teams stay small and senior. You work directly with the people doing the work, with no account managers in between, and every engagement ends with your own team more capable than when we started.
07 / FAQ
Frequently asked questions
Do you work remotely?
Yes. We’re remote-first and work with teams across the UK and Europe, with working hours that overlap UK and Central European time.
What kinds of companies do you work with?
We focus on fintech scale-ups, trading and investment platforms, and enterprise product teams that need senior iOS or architecture capability. If money, data or customer trust sit at the centre of your product, we’re likely a good fit.
Can you take over or modernise an existing iOS app?
Yes. We start with a codebase and delivery audit, then modernise incrementally: Objective-C to Swift, UIKit to SwiftUI, modularisation, test coverage and CI/CD. Feature work keeps moving while the foundations improve.
How do you handle regulatory requirements in fintech?
We design for them from the start: strong customer authentication, audit trails, data protection under UK GDPR and EU GDPR, and operational resilience. We work alongside your compliance and security teams rather than around them.
How do you approach GenAI in a regulated business?
We start with a use case you can measure, evaluate models against your own data, keep sensitive data in environments you control and keep a human in the loop where decisions matter. Pilots are small and time-boxed, so you learn quickly without taking on unnecessary risk.
Can you provide a fractional CTO or Head of Mobile?
Yes. Fractional leadership covers technical strategy, architecture decisions, hiring and team practices for a set number of days each month, and can scale up or down as your team grows.
Will you sign an NDA?
Yes. We’re happy to sign your NDA before any detailed conversation about your product.
08 / Contact
Tell us what you’re building.
Book a discovery call or send a few lines about your product, your team and what is in the way.
Useful to include
- What you are building and who it is for
- Team size and current stack
- What is blocking you, or what comes next
- Timeline and any hard constraints