UK-based .NET and Azure consultancy

Reliable .NET and Azure integrations for UK businesses.

I build and repair APIs, background services, and Azure-hosted applications where failed processing, duplicated data, or manual reconciliation is slowing delivery.

Book a 20-minute project call View delivery examples

Problems I can help resolve

Records are duplicated or disappear between systems.

Background jobs fail without anybody noticing.

Teams manually reconcile data between applications.

Deployments are fragile or poorly documented.

A legacy .NET application needs a controlled extension.

An agency needs dependable temporary backend capacity.

Services

Offers built around clear technical outcomes

£350

Integration Health Check

A focused technical review to identify integration risk and define the smallest sensible next step.

Deliverables

60-90 minute technical discovery
Review of architecture, implementation, or failure evidence
Prioritised risk and problem list
Written recommendations
Implementation estimate
Option to credit the fee against implementation work

Typical scope: Best for unreliable integrations, hidden failure points, and unclear root causes.

Suitable customer: UK software agencies, SMEs, and SaaS teams needing a quick technical diagnosis.

Book a health check

From £1,500

Fixed-Scope Repair or Prototype

A bounded delivery engagement for one high-impact backend or integration outcome.

Deliverables

Agreed scope, deliverables, exclusions, and acceptance criteria before work starts
Repair, extension, or prototype delivery
Testing and implementation notes
Handover documentation

Typical scope: Examples: repairing a failing integration, proof-of-concept API connection, monitoring and alerts, reliable webhook processing, or extending one bounded component.

Suitable customer: Teams that need one clear result without committing to long-term capacity.

Discuss a fixed scope

£600 per day

Ongoing .NET/Azure Delivery

Hands-on senior delivery for agencies and product teams that need dependable backend capacity.

Deliverables

Feature delivery and application improvement
API and integration implementation
Microsoft Azure implementation and reliability work
Agency subcontracted backend delivery

Typical scope: Used where teams need consistent momentum across integrations, services, and cloud-hosted .NET applications.

Suitable customer: UK software agencies, SMEs, and small SaaS teams with ongoing delivery demand.

Book a project call

Case studies

Delivery example: Terminal POS integration

The problem

The client had purchased Stripe Terminal hardware but needed a working application to process in-person payments and refunds.

My responsibility

I owned implementation and delivery of the application integration, deployment setup, and usage handover.

Technical approach

Built a C#/.NET-backed payment flow connected to Stripe Terminal
Implemented payment and refund handling
Added authentication and role separation
Implemented reader management behaviour
Deployed the application and provided operational guidance

Trade-offs and result

Prioritised reliability and clear operator flows over unnecessary feature breadth in the first release.

Client feedback confirmed the team could accept in-person payments and run the deployed application in production.

Technologies: C#, .NET, Stripe Terminal, Authentication, Deployment

Evidence basis: Based on published five-star freelance client feedback for Stripe Terminal delivery and deployment support.

Additional experience

Extending existing .NET business applications
Building API and third-party integrations
Background processing, retries, and operational diagnostics
Delivery support for UK-based software teams

Safe delivery

Risk reduction built into delivery

Agreed scope and acceptance criteria
Client-controlled repositories and Azure resources where appropriate
Weekly progress updates and demonstrations
Documented technical decisions
Secure credential handling
Automated deployment where appropriate
Clear handover documentation
Agreed post-release support

How it works

A four-step process

Step 1

Diagnose the problem

Step 2

Agree scope and acceptance criteria

Step 3

Deliver with visible weekly progress

Step 4

Document, hand over and support

Testimonials

Selected five-star freelance feedback

These reviews are from previous freelance delivery and are presented as technical evidence relevant to current .NET and integration work.

"We bought our Stripe Terminal and did not know what to do. He helped us build the app that connected the terminal to our Stripe account, and now we can take in-person payments. He also helped us deploy the application and walked us through how to use it."

Stripe Terminal integration and deployment support

Published five-star freelance platform review

"Did exactly what we wanted done in a timely manner. I would highly recommend to anyone!"

Backend delivery

Published five-star freelance platform review

"Worth every penny."

Implementation support

Published five-star freelance platform review

About

Work directly with the engineer responsible for delivery

I am a hands-on UK developer with more than four years of commercial experience delivering business systems, integrations, and cloud-backed applications. My core delivery focus is C#/.NET, Microsoft Azure, APIs, background processing, and reliability improvements across the full implementation lifecycle.

Credentials

Microsoft credentials relevant to Azure delivery

Current focus credentials

Previously held

Contact

Tell me what is failing, taking too much time or preventing delivery.

I'll tell you whether I can help and what the smallest sensible next step would be.

Email: haroldas.varanauskas@quantumdrift.tech

Booking: Book a project call

Response time: Usually within one working day.