Open Source Systems builds and modernises software for banks, fintechs and iGaming operators: industries where uptime is revenue and every transaction must stand up to scrutiny. Transparent process, senior engineering, no black boxes.
From a first prototype to a core system carrying real money, OSS covers the full lifecycle: design, build, integrate, harden, and hand over with documentation your auditors will actually thank you for.
End-to-end design and build of web platforms, internal systems and back-office tooling, architected for the load, compliance and reporting demands of your business.
Native and cross-platform apps for iOS and Android, from customer-facing banking and betting experiences to field tools for your operations teams.
Connecting the systems that must not disagree: payment gateways, core banking, KYC/AML providers, odds feeds, wallets and third-party platforms, with clean, documented APIs.
Incremental replacement of ageing systems without stopping the business: strangler-pattern migrations, data moves and re-platforming with a rollback plan at every step.
Architecture reviews, codebase audits, performance investigations and technology strategy. An independent senior opinion before you commit budget.
A senior full-stack engineer embedded in your team for a sprint or a season, raising delivery pace and engineering standards while transferring knowledge as we go.
We work daily inside the two most demanding verticals in software, money and gaming, and bring that discipline to every other sector we serve.
Platforms that move money demand traceability, resilience and airtight integrations. We build with compliance in the design, not bolted on at the end.
High-frequency, real-time, always-on. We understand odds feeds, wallets, bonusing and responsible-gaming controls from the inside of production sportsbook systems.
The habits regulated industries force on you (testing, monitoring, documentation, security) make software better everywhere. We bring them to any domain.
The name is the method. You see the backlog, the code, the tests and the costs for the whole engagement, and when we hand over you own all of it.
Workshops with your team to map the domain, the constraints and the regulators watching over your shoulder. Output: a scoped, priced, honest plan.
Architecture decisions written down and reviewed with you (data models, integrations, security posture) before a line of production code exists.
Short iterations, working software every week, automated tests and CI/CD from day one. You watch progress in the repo, not in a slide deck.
Source code, infrastructure, documentation and runbooks transferred to you, plus support and maintenance if you want us to stay close.
Open Source Systems is a software engineering consultancy based in Gauteng, South Africa. We build for the deep end of the pool: our experience comes from inside high-stakes production systems, sportsbook and casino platforms where seconds of downtime cost real money, and from serving clients in the banking sector with the same discipline.
When OSS takes on your project, you get senior engineers, not a sales team, an account manager and a rotating cast of juniors. The people who scope your work are the people who architect it, build it and answer the phone, and they stay with the engagement from kick-off to handover.
Lean by design. Serious by habit.
Tell us what you're trying to ship, modernise or untangle. You'll get a straight answer from an engineer, not a pitch deck.
hello@opensourcesystems.co.za