Legacy platform modernization competes directly with the pressure to release new product capability. Security and reliability requirements raise the stakes on every deployment, and engineering leaders are left balancing innovation against platform stability, often with the same headcount and the same backlog.
We need to modernize without destabilizing production.
Our legacy system is limiting what we can deliver.
We need delivery partners who understand regulated financial systems.
Two structural problems show up again and again in fintech and financial services engineering organizations working through legacy modernization: no single owner for the outcome, and too much friction between the teams and vendors involved in getting a release out the door.
Who is accountable for the outcome?
A vendor owns the code. Engineering owns headcount. Product owns the roadmap. No one owns the delivery outcome end to end. This is common on legacy modernization efforts with contributors from multiple vendors and no single accountable owner for the migration itself.
How does work flow between teams?
Security review, compliance sign off, and release coordination each add a checkpoint. Multiply that across several vendors and internal teams and the cost of coordinating the work starts to exceed the cost of doing it. The people are right. The handoffs are not.
Sonatafy's offerings are organized around one idea: diagnose the delivery problem, then install the right level of ownership to fix it. These are the ones that come up most often for fintech and financial services teams working through legacy modernization and platform stability.
Strategic technology leadership for growth-stage companies that cannot yet justify a full-time CTO, or are between CTOs, including in the first 100 days after a change of ownership.
Delivery oversight for complex, multi-team initiatives that are slipping, have unclear ownership, or span multiple vendors, exactly the pattern behind most stalled modernization programs.
Point-in-time review engagements for pre-acquisition diligence, post-incident reviews, or assessing whether a platform is buildable from its current state.
LLM strategy, build versus buy decisions, model selection, and data readiness for AI initiatives, including establishing an evaluation framework before an AI feature reaches production.
Client journeys often begin with a focused Consulting engagement, a delivery or platform health assessment, or a Fractional CTO engagement, before moving into a Managed Delivery POD once the diagnosis is clear. Some fintech teams start directly with a POD when the problem is already well understood.
Kickoff, codebase and architecture review, backlog assessment, and team integration.
First delivery sprint underway, with initial delivery metrics established.
Most engagements see meaningful contribution to delivery by this point.
Ramp time is faster when a client has a documented backlog, an accessible codebase, and a product or engineering point of contact available for a few hours a week during onboarding.
Beyond fintech, Sonatafy's broader portfolio spans 60+ client engagements across healthcare technology, manufacturing, enterprise technology, and media, and the company has been recognized three times on the Inc. 5000 list of America's fastest growing private companies.
Sonatafy's positioning is shaped by direct conversation with engineering and executive leaders, not just internal opinion.
Podcast
200+ episodes of Software Leaders Uncensored, hosted by Sonatafy founder and CEO Steve Taplin, featuring conversations with CIOs, CTOs, CEOs, and engineering leaders on the same category of software delivery challenges fintech and financial services teams describe: legacy modernization, security stakes, and platform stability.
Listen to the podcast →Published writing
248+ published articles by Steve Taplin in Forbes, Entrepreneur, CIO, and Inc., on the structural problems behind software delivery, and author of Fail Hard Win Big.
Read the articles →Every Managed Delivery POD includes a US-based principal engineer who owns architecture and delivery outcomes, not a rotating cast of vendor contacts.
Engineers based in Latin America work within US time zones and participate directly in architecture discussions, sprint planning, and production support, so decisions do not wait for the next overlap window.
Sonatafy can provide documentation on data handling practices, vendor agreements, and confidentiality standards. Specific compliance requirements are reviewed and confirmed during scoping and onboarding.
Sonatafy installs execution ownership. A staffing vendor fills seats without addressing the structural delivery problem underneath a stalled modernization effort.
Product Assessment
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