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Software development services

From PoC and MVP to enterprise systems, analytics and modernisation.

Proven in productionResults from work we have shipped

A consumer banking super-app in a regulated market had to launch at scale inside a fixed regulatory and competitive window. We owned the integration architecture and mobile delivery.

1.5M+
installations
150x
lending growth
9 months
to public launch
From the case files: Banking super-app – 1.5M+ installations and 150x lending growth.Walk through the case
What we coverServices in this area

Named sub-services with their own pages and engagement shapes.

Software we build
Internal software solutions

Financial analytics for fintech teams to process large datasets, track performance and improve customer service – delivered as secure, role‑based apps.

Enterprise software development

Custom enterprise software with modular capabilities to digitise back-office and front-office operations, aligned to SLAs and governance.→ More about Enterprise Software Development

Web application development

End-to-end billing and payment workflows with transaction tracking and detailed reporting – built for multi-device continuity.→ More about Web Soft Development

Mobile app development

Leasing and field-operations apps for equipment and automotive finance – improving turnaround times, accuracy and compliance.→ More about Mobile App Development

Fintech software

Payment flows, KYC/AML onboarding and servicing tools where the user experience and the compliance requirement have to hold at the same time. We build systems that keep operators and customers on the same data – so a status an agent sees matches what the customer sees – and that pass regulatory review without a parallel paperwork exercise.

Banking software

Digital banking capabilities for retail and commercial contexts, built against the realities of core banking integration rather than around them. We connect to the core through stable, versioned interfaces, layer personalisation and reporting on top, and design every flow to behave correctly when an upstream system is slow, offline or returns the unexpected.

Leasing software

Origination, pricing, invoicing and end-of-term flows for lenders and lessors, automated end to end rather than screen by screen. The aim is fewer manual touches per contract: applications that move themselves through approval, invoices that reconcile without a spreadsheet, and end-of-term decisions surfaced before they become arrears conversations.

Know the problem, not the engagement shape?

Describe what has to change and we will route you – PoC, MVP, build or modernisation.

How we workHow we deliver software

The same delivery discipline on every engagement – from the first map to a handover your team runs.

01
Map the system

Discovery starts with the business, not the backlog: which journeys make money, which systems hold the data, where the regulatory boundaries sit. We leave this stage with a shared definition of done that an estimate can credibly be built on.

02
Architect for change

Before code, the decisions that are expensive to reverse: service boundaries, data ownership, API contracts, the integration approach for every external system. We design for the second year of the product, when change requests arrive faster than the original assumptions survive.

03
Build in increments

Delivery runs in short cycles, each producing software you can use, not artefacts that describe it. Real journeys go end to end early, against real integrations, so the risky assumptions are tested while there is still budget to act on what they reveal.

04
Hand over a running system

Launch is a stage, not the finish. We harden the system in production, transfer the operational knowledge deliberately, and leave your team able to run, extend and change what we built – with us available as a partner, not a dependency.

In practiceWhat shapes the work
One practice, from first proof to enterprise scale

Choosing a software development partner is rarely a question of who can write code. The real question is whether one team can carry a system through every stage it will pass through – the proof that the idea works, the first product, the enterprise build, the analytics that follow, and the modernisation that eventually comes due. Switch partners at each stage and you pay for re-learning every time: the domain, the data, the decisions nobody wrote down.

We run software development as a single practice across those shapes, from validation through build to long-term evolution. The same engineering discipline applies whether the deliverable is a narrow proof of concept or a core system a business runs on: explicit scope, architecture decided in the open, software that ships early, and instrumentation that shows whether the work moved the numbers it was meant to move. What changes between shapes is the depth of governance and the size of the team, not the standard of the work.

To see how this practice sits alongside everything else we do, browse every practice area in one place.

What an enterprise client said

We collaborated with WislaCode on a product strategy development project and gave the highest marks for this contractor. The WislaCode team delivered on time and with outstanding quality. I want to mention the team's transparency while running the project – everything was trackable, visible and manageable.

Mikhail Krasnov, Executive Chairman, Verysell Group
ScopeWhat is included in a software engagement

Whatever shape the engagement takes, the artefacts, disciplines and checkpoints below are included as standard – scoped in from day one, not added later as change requests.

01

A discovery phase that produces a written scope, a domain model and an integration inventory the whole build is estimated against.

02

Architecture decision records that capture why the system is shaped the way it is, so future engineers inherit reasons rather than folklore.

03

Working software delivered in short increments, each wired end to end and demonstrated against acceptance criteria agreed before the increment starts.

04

Automated test suites and CI/CD pipelines that run on every change, so release readiness is a permanent state rather than an event.

05

Security engineering threaded through every increment, with findings treated as defects in the sprint rather than items on a pre-launch checklist.

06

Observability from the first deployment – metrics, logs and traces wired into dashboards your team can read without asking us.

07

A named delivery lead and a weekly steering cadence that puts progress, risks and the decisions coming next in front of you.

Everything produced in the engagement is yours: source code, infrastructure definitions, documentation and data.

Frequently asked questions
What’s the difference between custom and off‑the‑shelf for our use case?

Off‑the‑shelf tools are faster to start but force process compromises and create integration gaps. Bespoke delivery aligns to your workflows, data and security controls, reducing manual work and long-term licence drag. We often blend both: a core custom layer with targeted products where they excel, stitched together via stable APIs.

How do you decide between legacy modernisation and a rebuild?

We assess architecture fitness, technical debt, run costs and change velocity. If targeted refactoring can meet roadmap goals, we modernise in place – improving performance, reliability and security. If constraints are structural, we stage a rebuild around well-defined boundaries, preserving data and business logic while avoiding a big‑bang cut-over.

Can you integrate with our ERP, CRM and payment providers?

Yes. We define explicit API contracts, versioning and idempotent behaviours. For older systems we use adapters to normalise data and manage errors. Event streaming decouples services, while observability highlights latency or failure hot-spots before customers notice.

How quickly can we reach a first release?

Scope varies, but we target a first value slice in 6–12 weeks: one or two high-impact journeys wired end-to-end, instrumented with metrics and feedback loops. Subsequent iterations expand coverage, refine UX and improve performance based on real usage data.

How do you ensure security and compliance at scale?

Security is built in: threat modelling, dependency scanning, secrets management and environment hardening. We encrypt data in transit and at rest, enforce least‑privilege access and maintain tamper-evident logs. Change governance and audit artefacts support regulatory reviews without slowing delivery.

Will our team be able to operate and extend the platform post‑launch?

Yes. We provide documentation, runbooks, dashboards and handover sessions. Codebases follow clear conventions and modular boundaries. We can remain as a partner for optimisation and features, or support a clean transition to your internal teams.

What drives the cost of a custom software project?

Four things dominate: how clearly the scope is defined, how many external systems the software must integrate with, the regulatory and security requirements of the domain, and the seniority mix of the team. We size all four in a scoping phase before any build commitment, so the estimate you decide on is built from named journeys and named integrations, not from a category average.

What do you need from us to get started?

A decision-maker with time to make calls, access to the people who know the current process, and whatever documentation exists – even if it is outdated. We do not need a written specification; producing one is part of the scoping phase. For systems already in production we also ask for read access to the codebase and environments early, since the estimate is only as honest as what we have seen.

Can you take over a system another vendor built?

Yes, and it is a common starting point. We begin with a technical audit – codebase, infrastructure, deployment path, documentation gaps – and stabilise whatever is fragile before adding features. You get a written assessment of what you own, what state it is in and what the realistic options are, which is useful even if you decide not to continue with us.

Trusted by our clientsWhat teams say about working with us

This was a very task-heavy project, mostly exploration and R&D-driven. However, by the end of WislaCode, we were left with a detailed roadmap consisting of clear milestones – able to be converted into tangible KPIs – and some neat ideas of what actionable are next. Integrating...

Yurii Lozinskyi
Head of Applied AI Lab, Verysell Group

We collaborated with WislaCode on a route-to-market optimisation project. Working with WislaCode was effective, transparent and predictable, which is especially critical for AI and ML projects. We provided them with six months of anonymised data, and within just three weeks...

Julia Dvornikova
Co-Founder, Taal Healthtech

Working with WislaCode Solutions has been a great experience! We needed an Android SDK developed under a tight timeline, and their team delivered a flexible, user-friendly solution that integrated seamlessly into our ecosystem. Their transparent approach, proactive...

Loukas Charalampous
Solutions & Delivery Manager, payabl.
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Weighing custom software against another workaround?

Bring the business case and we will plan the build that pays it back.