WislaCode is an engineering unit that owns client and partner integrations end to end for banks, payment providers, lenders and acquirers - delivered under your controls, your architecture and your standards.
Every new bank, PSP, lender or partner that wants to connect to your platform is an integration — and each one quietly pulls your best engineers off the roadmap. We sit alongside your team and own that work end to end.
We plug into your stack, not around it. Your architecture, your conventions, your review process — we work inside them, not in a silo.
Clients and partners go live under your controls. Permissions, audit trails and data boundaries stay exactly where your compliance team wants them.
Your core team keeps shipping. The roadmap doesn't stall every time a high-value integration lands on the backlog.
From one blocked connection to a platform-wide consolidation — scoped, owned and delivered by senior integration engineers.
One blocked integration, taken from stuck to production-live. We parachute in, find the wall, and ship through it.
Explore the sprint 02Reusable integration layerThe layer that makes the next integration fast. Connectors, contracts and tooling so partner number ten costs a fraction of partner number one.
See the approach 03Payment platform consolidationMerge duplicate payment stacks into one — without breaking live transactions. Migrations planned and executed with zero-downtime cutovers.
See the approachA selection of delivered work, described by partner type. Named references available under NDA in a review call.
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 communication, and commitment to quality made the collaboration smooth and efficient. We highly recommend WislaCode Solutions as a reliable and skilled fintech development partner!
WislaCode specialists quickly synchronised and worked with the second team involved in developing our solution. As a result, having started development from scratch, we came to the expected result quickly. The first users went to the application after 5 months.
Four things that make us different from staff augmentation - and safer for a regulated platform to trust with live money flows.
We speak settlement, scheme rules and decisioning — so you're not translating your domain to contractors before any code gets written.
We own the design and the outcome of the integration — accountable for it shipping and standing up in production, not just for hours billed.
A clear European contracting entity, clear scope, clear pricing. No murky subcontracting chains, no surprises for your legal and procurement teams.
Everything we build lands in your repos with documentation, runbooks and handover. No lock-in, no dependency on us to keep it running.
Book a 30-minute integration review. We'll look at one blocked or upcoming integration with you and tell you, honestly, the fastest safe path to live.