Expert services · Multi-engagement
This is the multi-engagement hiring path. Senior base44 engineers for weeks-to-months engagements across builds, migrations, multi-bug rescues, and quarterly audits. Dedicated capacity, written architecture reviews, defined SLAs, named senior end-to-end. Productized scopes from $4,500 MVP through $25,000+ enterprise migration. For a one-off bug fix or one-decision call, see the broader path on the pillar page for hiring a base44 developer.
Short answer
Base44 expert services are multi-month engagements with a senior base44 engineer embedded on a production-grade SaaS — builds, migrations, multi-bug rescues, and recurring quarterly audits. You get dedicated capacity, written architecture reviews at engagement start, weekly progress notes, and a defined SLA on response and ship time. Scopes are productized: $4,500 MVP build, $15,000 premium build, $6,000-$25,000+ migration off platform. After a successful first engagement, monthly capacity blocks at $4,000-$8,000 keep a senior on retainer with a defined SLA. Senior only, no junior bench, no offshore subcontracting. The same engineer who scopes the work ships it.
What "expert services" means here
"Expert services" is one of the most over-loaded phrases in B2B services marketing. Below is what it means at Base44Devs, written down so the engagement letter holds no surprises.
Hourly bills the buyer for engineer ramp-up time, slow days, and scope drift. Our default is fixed-scope so the engineer is incentivised to ship, not to bill. Hourly is reserved for legal, due-diligence, and acquisition contexts where the scope is genuinely open-ended — handled on the consultant path.
If your situation is a single bug or a single production-down incident, the right path is the urgent or fix-sprint route — not expert services. Expert services begin when one fix will not cover the work: a build, a migration, a multi-bug rescue, or a quarterly audit cadence.
Generalist agencies sell "developer hours" with an account-manager layer between the buyer and the engineer. We skip both. Capacity is named-engineer-aligned and the engineer writes the engagement letter, the architecture review, and the weekly progress notes. No relay layer.
For the duration of the engagement, the assigned senior is in your workspace daily, in your Slack channel, and on your weekly product call. Code review, architecture, platform- regression coverage, and shipping — same person across all of it. End-to-end ownership, written hand-off at close.
Engagement models
Multi-month engagements take one of four shapes. Each is fixed- scope, weekly progress notes, written hand-off, and a named senior engineer end-to-end. Pick the shape that matches your situation and click through to the dedicated service page for full pricing tiers and engagement letter templates.
Model 01 · Build
MVP at $4,500, standard at $9,000, premium at $15,000. Two-week MVP through eight-week premium. Discovery, build, ship to production, hand-off doc. Auth, payments, SEO baked in. Full tier breakdown on the build page.
Model 02 · Migrate
Small migration at $6,000, medium at $12,000, enterprise at $25,000+. Schema migration, auth re-platforming, payments cutover, rollback plan. Targets include Next.js + Supabase, Vercel, self-hosted, Replit, Bolt. Full tier breakdown on the migrate page.
Model 03 · Multi-bug rescue
Multi-bug rescues for SaaS apps with three or more concurrent production defects start at $3,000 for an 8-defect cap and scale to $15,000+ for an extended rescue across auth, payments, RLS, and AI-agent regressions. Triage matrix, written summary per defect, regression suite at close.
Model 04 · Quarterly audit cadence
Production-grade SaaS on base44 should not run a year between audits — platform updates, AI-agent edits, and integration drift compound silently. Quarterly $497 audits with a four-engagement discount and a written drift register. Detail on the audit page.
What "senior" means here
Most agency "senior" tags mean "has a LinkedIn." Below is the credential floor every Base44Devs engineer hits before they ship to a client workspace. Verifiable against the named bylines on the engagement letter.
Floor: 25 production base44 apps shipped. Most engineers on the team have shipped 100+. Verifiable by portfolio link on the engineer's public page.
Public profiles with named work. No anonymous accounts, no undisclosed offshore subcontracting. The engagement letter names the engineer; the engineer's LinkedIn matches.
Every senior carries at least one bylined fix playbook, build summary, or migration writeup on the Base44Devs site. So you can read the engineer's public technical writing before you sign the engagement letter.
Direct experience shipping fixes against every error type in the base44 feedback portal — function routing, credit burn, AI-agent regressions, SSO bypass, RLS drift, webhook signature breakage, rate-limit throttling.
Two prior client engagements willing to take a reference call at engagement-letter stage. Reference list shared after the free 15-minute scoping call, redacted client names available on request with written consent.
What you get
TIER
$497
USD · Fixed-price · One engagement
One business day. Architecture, security, performance, and SEO review with a written remediation plan. The standard entry point into a longer engagement.
Scope
TIER · RECOMMENDED
$4,500
USD · Fixed-price · One engagement
Two-week MVP build by a senior engineer end-to-end. Discovery, build, ship to production, written hand-off doc.
Scope
TIER
$6,000
USD · Fixed-price · One engagement
Migrate off base44 to Next.js + Supabase, Vercel, or self-hosted. Small-app tier; medium and enterprise tiers scale up.
Scope
Standard build at $9,000 and premium build at $15,000 on the build page. Medium migration at $12,000 and enterprise migration from $25,000 on the migrate page. Quarterly audit cadence on the audit page. For verification of AI-builder output before it ships, see the Base44 AI builder audit.
Pricing transparency
Six operational facts every procurement team asks. Written here so the engagement letter is a formality, not a negotiation.
Multi-month engagements bill on milestones — typically 30% kickoff, 40% mid-engagement deliverable, 30% on hand-off. No hourly meter, no surprise invoices. Milestones are written into the engagement letter at scope.
When scope changes mid-engagement, change orders are priced at the same fixed-scope per-tier rate, written, and signed before work begins. We do not back-bill scope creep against the original engagement letter.
The $497 audit fee is fully credited toward any subsequent build, migration, rescue, or retainer booked inside 30 days. Functionally the audit is no-cost when you proceed.
Net-30 is the default for milestone invoices. Net-15 is available with a 2% prompt-pay discount on engagements over $15,000. ACH and wire are preferred over card for finance teams that prefer to avoid card surcharges on large invoices.
Monthly capacity blocks at $4,000-$8,000/month after a successful first engagement. Block buys a defined number of senior hours per month with rollover up to 50% of the unused block into the following month. SLA on response and ship time written into the retainer letter.
30-day termination on either side with milestone reconciliation — you pay for completed work, we hand off in-flight work gracefully. All code IP transfers to the buyer on payment of the engagement-closing milestone. No license-back, no usage clawback.
QUERIES
Multi-month senior engagements on production-grade base44 SaaS — dedicated engineering capacity, written architecture reviews, and defined SLAs. Not hourly consulting. Not a one-off bug fix. The buyer is a SaaS team that needs an embedded base44 specialist for weeks or months across a build, migration, multi-bug rescue, or recurring quarterly audit. Pricing is fixed-scope from $4,500 MVP build through $25,000+ enterprise migration.
The urgent page is for production-down emergencies that need a 48-72 hour fix. This page is for teams that need an embedded senior across multiple weeks or months — build, migrate, multi-bug rescue, quarterly audit. Both are senior engineers; different shapes of engagement. If your situation is one fix today, that page is the right path. If it is ongoing senior coverage on a SaaS, this is the right path.
Fixed-scope is the default because hourly retainers create the wrong incentives — engineers go slow, scope creeps, and the buyer never knows what is coming. After a successful first fixed-scope engagement we offer monthly capacity blocks ($4,000-$8,000/month) for ongoing fixes, performance work, and platform-update coverage. The block model gives you a defined SLA without paying for an open-ended hourly meter.
Every multi-month engagement ships weekly written progress notes, a written architecture review at engagement start, a regression test plan, code review by a second senior on auth/payments/data-touching changes, and a written hand-off doc at close. Migration engagements add a schema migration plan, payments cutover plan, and rollback playbook. Builds add discovery deliverables and an MVP definition document.
Every engineer assigned to an expert services engagement has shipped at least 25 base44 apps in production (most have shipped 100+), carries a public LinkedIn and GitHub, and has named bylined work on the Base44Devs site. We do not subcontract to undisclosed offshore generalists. The engineer who scopes the work ships the work. References from prior engagements are available on request after a free 15-minute call.
Yes. We sign MSAs, NDAs, DPAs, and security questionnaires. We hold cyber-liability insurance. We work as a 1099/W-9 vendor for US procurement and bill via ACH, wire, or card. Net-30 is the default; net-15 with a 2% prompt-pay discount on engagements over $15,000. Enterprise procurement docs are available on request inside one business day.
Yes — after a free 15-minute call we share two to three case examples that match your situation. We do not publish client names without written consent, so case detail is shared in the call. For migrations and enterprise-tier engagements we can also arrange a reference call with a prior client at the engagement-letter stage.
Process detail
Most buyers have been burned by vague engagements before. Here is what the first ten days looks like in practice — written so you know exactly what to expect, what to push back on, and where the deliverables land.
Day 0
We confirm the scope, urgency, and which engagement model fits. If the work is a wrong fit (single bug, multi-platform, cosmetic), we say so on the call and refer you out. If it fits, we send a written engagement letter inside two business hours — named senior, fixed price, milestones, deliverables.
Day 1
Read-only collaborator access to your base44 workspace. The first task is the written architecture review — data model, auth posture, payments path, integration surface, AI-agent edit history. Lands as PDF + Markdown in three to five days.
Day 3-5
Written architecture review: scope, findings, prioritised actions, cost-of-inaction estimate, regression watch items. For migrations, the review includes the schema migration plan, payments cutover plan, and rollback playbook. Walkthrough call included.
Week 2 onward
Weekly written progress notes (Friday end-of-day) covering shipped, in-flight, blocked, and next-week scope. Milestone deliverables ship per the engagement letter. Code review by a second senior on auth, payments, and data-touching changes before merge.
Engagement close
Written hand-off doc, regression watch list, walkthrough call. 14-day open line included. Retainer letter offered for ongoing coverage if the fit was good — monthly block model, defined SLA, rollover rules.
NEXT STEP
Audits start within one business day; multi-month engagements scope inside one week. Fixed prices, written milestones, named senior end-to-end.