PeraByteAIFree workflow audit
CASE STUDIES

Proof before
promises.

Before you trust anyone with your operations, you should see what they have delivered. Abid, who leads every PeraByte engagement, spent 8+ years building systems that banks, payment providers, and telecom operators rely on daily. Each story below shows the business problem, what changed, the measured result, and what the same approach could mean for you.

Delivered by Abid Hasan as an engineer and tech lead before founding PeraByte. Personal track record, not PeraByte client projects. Client names are withheld here; the linked write-ups on Abid’s portfolio carry the full detail.

Abid on LinkedIn Full portfolio GitHub
  • 8+ yearsrunning systems that banks, telecom operators, and payment providers depend on every day
  • 95% on timedelivery across projects led from kickoff to production
  • 99.9%availability on platforms where downtime meant lost revenue
System IntegrationsPayments

Six bank payment gateways behind one connection.

  • −80%effort to integrate payments
  • Weeks → daysto add a new provider
  • 6currencies supported
The challenge
Merchants had to build and maintain a separate integration for every bank, each with its own rules, so adding a payment option took weeks.
What changed
A single connection layer that speaks to every bank and returns results in one consistent format, with options switched on per merchant without new code.

What it means for your businessIf your CRM, billing, booking, or accounting tools disagree or need manual copying, one well-designed connection layer removes the re-keying and makes adding tools cheaper.

hSenid Mobile Solutions · Built with Java, Kotlin, Spring BootFull case study
Custom SoftwareRetail banking

Customer rewards the business team runs without waiting on IT.

  • −90%manual processing time
  • −75%time to look up a customer
  • Weeks → hoursto change a business rule
The challenge
Sorting millions of customers into tiers and calculating their benefits was manual, error-prone, and every rule change needed a software release.
What changed
A platform that applies the rules automatically, lets business users edit those rules on screen, and shows each customer’s full picture in one view.

What it means for your businessIf your pricing, eligibility, or approvals live in spreadsheets and people’s heads, custom software can run them consistently while your team stays in control of the rules.

hSenid Mobile Solutions · Built with Java, Rules engine, ReactFull case study
System IntegrationsTelecom billing

Fewer failed transactions and problems found before customers notice.

  • −30%failed transactions
  • −60%time to diagnose an issue
  • +40%faster at peak load
The challenge
Billing and subscription requests between systems timed out at busy times, and when something failed it took too long to find out why.
What changed
A dependable link between the systems with automatic retries, health checks, alerts, and a reference number that traces every request end to end.

What it means for your businessIntegrations fail quietly. Building in retries, alerts, and traceability means fewer lost orders or payments, and quick answers when something goes wrong.

hSenid Mobile Solutions · Built with Kotlin, Spring Boot, GrafanaFull case study
Custom SoftwareTelecom messaging

Twelve times the capacity, half the server load, and no peak-day outages.

  • 12×capacity
  • −75%response time
  • −50%server load
The challenge
The platform carrying SMS and billing hit its limit at busy times. The usual answer was more servers, at more cost.
What changed
Measured where time and money were really going, then restructured and tuned the system so it could handle far more on fewer resources.

What it means for your businessBefore paying for more software or infrastructure, it is worth measuring the bottleneck. Often the better fix is cheaper and faster.

hSenid Mobile Solutions · Built with Java 21, Spring Boot, RocksDBFull case study
AI AutomationField data collection

New forms published in minutes, without a developer.

  • −70%development cost per form
  • Minutesto publish a new form
  • 5+apps using it in production
The challenge
Field teams’ data collection forms changed constantly, and each change waited weeks for development and an app update.
What changed
A form engine where staff design forms in a web portal and they appear instantly in the app, with validation and offline use built in.

What it means for your businessIf your intake forms, checklists, or inspections change often, the right tool lets your team update them directly instead of raising a ticket each time.

Field Buzz · Built with Kotlin, AndroidFull case study

More delivered projects

Shorter summaries from the same portfolio. Each links to the full write-up.

  • Telecom customer care

    Customer care that finds any subscriber in under two seconds

    Turned millions of daily call and billing records into instant search and automatic reports for the support desk.

    • < 2 ssearch response
    • Millionsrecords a day
    • 99.9%availability
    Full write-up
  • Payments

    Merchant self-service and campaigns set up in minutes, not days

    Four and a half years extending a payment platform with merchant self-service, automated campaigns, commissions, and reporting.

    • Days → minutesto launch a campaign
    • 8+modules delivered
    • 4.5 yrscontinuous delivery
    Full write-up
  • Telecom security

    Secure SIM sign-in with self-service reporting

    Ran and modernised the server that signs mobile customers in, adding encryption, automatic failover, and dashboards.

    • −90%manual reporting time
    • −70%support requests
    • 99.9%uptime
    Full write-up
  • Telecom messaging

    Link checking fast enough that users never notice it

    Resolved shortened links in messages in real time, with caching, retries, and monitoring built in.

    • < 5 msresponse time
    • 99.9%availability
    Full write-up

Looking for software you can start using sooner? See PeraByte’s products

WHAT CARRIES INTO YOUR PROJECT

The same habits,
applied to your workflow.

Your project will be smaller than a national telecom platform. The discipline that kept those systems reliable still applies.

RECOMMENDATIONS

Dependable, clear,
on time.

Recommendations given to Abid on LinkedIn by managers, analysts, and engineers he has delivered alongside. Each name links to the author’s profile so you can check it yourself.

Abid understands complex requirements quickly and consistently suggests alternative approaches that improve efficiency and quality. Having him on the team gave me full confidence in our technical delivery — a responsible, dependable problem solver.
Kaniyout Ranjan J Operations Manager · hSenid Mobile Solutions
Working with Abid across our Sri Lanka and Bangladesh teams, he proved to be an exceptional senior developer — high-quality work, delivered independently and always on time. He explains complex technical concepts in clear, accessible terms.
Amith Lokugamage Senior Business Analyst · GovTech Singapore
His architectural thinking and clean coding turn complex requirements into scalable, reliable solutions — and he leads by example: calm under pressure, solution-oriented, always ready to jump on a call no matter the time zone.
Lahiruka Wijesinghe Adelaide University
Abid became an asset to my team very fast — the speed and accuracy of his development is often astonishing.
Md. Tariqul Islam Team Leader · Product Manager
One of the brightest developers I have worked with — well-organized, high-quality, maintainable code, an eye for detail and quick execution. A great asset and a true team player.
Mahmud Al-Noor Tareq Software Development Engineer II · Amazon
Abid works well under pressure and continuously meets expectations, with strong object-oriented programming and design-pattern fundamentals.
Md Mobarak Hosen Software Architect · TechnoNext
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