Practice Area
Stabilize, maintain, and integrate your existing codebase.
Our senior engineers step into existing web and mobile repositories to fix bottlenecks, run SLA maintenance, and build resilient two-way API integrations.
Does this sound familiar?
Signs you have outgrown your current setup
- +Your previous agency or developer left, and nobody wants to touch the existing codebase without breaking production
- +Customers and operations staff are blocked waiting on third-party API integrations, payment gateways, or webhook syncs
- +Slow database queries, recurring bugs, or outdated dependencies are hurting reliability and burning engineering hours
“Our existing codebase or API integrations are slowing down the business, and we need senior engineers to take charge.”
What we build
Capabilities inside this practice
Existing codebase takeover & stabilization
Rapid architectural audit of undocumented repositories, dependency upgrades, security patching, automated test coverage, and CI/CD pipelines.
Third-party API & webhook engineering
Resilient two-way integrations with payment systems (Stripe, Adyen), ERPs & accounting (QuickBooks, Xero, NetSuite, Odoo), CRMs (HubSpot, Salesforce), 3PLs, and telecom APIs.
Ongoing maintenance & feature retainers
Predictable SLA-backed bug resolution, uptime monitoring, database health checks, and continuous feature delivery on your existing product.
Performance & database optimization
Profiling and fixing N+1 queries, PostgreSQL indexing bottlenecks, memory leaks, slow API endpoints, and bloated cloud infrastructure bills.
Zero-downtime legacy modernization
Incrementally refactoring aging monoliths, migrating databases, or upgrading frontend/backend frameworks without disrupting active users.
Partner API & webhook gateway design
Building clean, versioned REST/GraphQL APIs, rate limiters, and webhook emitters so your software connects cleanly with enterprise customers.
Execution
How we deliver without surprises
Codebase & integration health audit
We inspect your repository, database schemas, error logs, and API failure points to isolate immediate stability risks.
Stabilize & lock CI/CD first
Before shipping major changes, we put staging environments, automated regression tests, and rollback safety nets in place.
Predictable ongoing execution
Whether scoped as a dedicated API integration project or a monthly maintenance retainer, we ship clean pull requests with full visibility.
Built by Vector Dynamic
Related engineering case studies
Okebase
Multi-Entity ERP & Operations LedgerUnifies inventory, purchasing, approvals, and consolidated accounting across subsidiaries with database-enforced tenant isolation and sub-50ms ledger queries.
Opsera
Slack-Native Company Operations OSRuns daily standups, leave approvals, RBAC task tracking, and AI thread-to-task structuring in Slack, synced with an executive web cockpit.
LedgerFlow
Autonomous AP & 3-Way Match PipelineExtracts multi-page vendor PDFs with deterministic math checks, reconciles lines against purchase orders and receipts, and posts clean vouchers to the ERP.
Industry Playbooks
Where teams apply this most
FAQ
Questions buyers ask about this practice
Can you take over a messy codebase written by another agency or former developer?
Yes. We start with a structured codebase audit to map architecture, security risks, and deployment pipelines, stabilize critical bugs first, and then transition into steady feature delivery and refactoring.
Do we need a long-term retainer for API integration work?
No. Standalone API integrations or performance overhauls can be contracted as a fixed-scope milestone project, while ongoing product maintenance, monitoring, and backlog execution are available on flexible monthly retainers.
Explore further
Other practice areas
Tell us about the system your operations need.
Book a 30-minute discovery call with a senior engineer, or request a free written review of one workflow.