Backend Development · Cardiff
Backend Development in Cardiff
The half your Cardiff customers never see and would notice immediately if it failed — data models, business rules, authentication, integrations and the jobs that run overnight. Correctness matters more than anything else here, because a wrong number in a database outlives whoever entered it.
Why this comes up
The problem
Business logic scattered across an interface, a spreadsheet and three people's habits produces different answers depending on who asks. Nobody can point at where a rule is actually enforced.
What you get
What we deliver
- A data model that reflects how the business genuinely works, with constraints enforced in the database
- Business rules implemented once, server-side, rather than duplicated per screen
- Authentication and permissions verified on the server, never assumed from the interface
- Integrations with third-party systems, including sensible behaviour when they are down
- Scheduled and queued jobs with retries and visibility when one fails
- Automated tests over the logic that would cost money to get wrong
- Logging and monitoring so a production problem is diagnosable rather than mysterious
Want this scoped for your business in Cardiff?
Thirty minutes, no charge, no sales script. You leave with a written summary of what backend development would actually involve — whether or not you use us.
Working in Cardiff
Wales
Cardiff has a significant broadcast and media sector alongside a large public-sector presence, and Welsh-language provision is a genuine requirement on public-facing work here rather than a nice-to-have.
Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option.
Sectors we work with in Cardiff
- Media & Broadcasting
- Financial Services
- Public Sector
- Higher Education
- Sport
What we work with
Technologies and platforms
- TypeScript
- Node.js
- .NET
- Python
- PostgreSQL
- Redis
- Docker
Who we work with
Industries we serve
- Financial services
- Logistics
- Healthcare
- Manufacturing
- Ecommerce
Why us
Why Cardiff businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in Cardiff
Looking for the full picture? See our Backend Development services, everything we do in Cardiff or browse everything we do.
Backend Development in Cardiff — common questions
- Can you take over a back end someone else built?
- Usually yes. The first step is a short review of the code, the data model and the deployment setup, so the estimate is based on what is actually there rather than what the previous supplier described. Occasionally that review concludes a rewrite is cheaper, and we would rather tell you that early.
- Why enforce rules in the database as well as the code?
- Because code changes and data outlives it. A constraint in the database is the last defence against a bug, an import script or a well-meaning manual fix putting the business into a state it should never reach.
- How do you handle third-party systems going down?
- By assuming they will. Retries, queues and clear failure states are designed in, because an integration that only works when the other end is healthy will eventually take your product down with it.
- Do we need automated tests?
- Over the logic that moves money, calculates entitlements or touches compliance, yes — those are exactly the bugs that are expensive and quiet. Chasing a coverage percentage across trivial code is not the same thing and we will not bill for it.
- Do you work with businesses across Cardiff?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout Wales, including Cardiff and the surrounding Cardiff area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of Cardiff businesses do you usually work with?
- Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option. Beyond that we work across Media & Broadcasting, Financial Services, Public Sector, Higher Education and Sport.
- Do you cover the areas around Cardiff?
- Yes — we work throughout Wales, including Bristol, Swansea. Cardiff is an urban area of roughly 490,000+, and we take on work across the wider Cardiff region rather than the city boundary alone.
Talk to us about Backend Development in Cardiff
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise