Flask is a lightweight Python web framework for APIs, microservices and small web applications.
Salesforce Select Partner · 15+ years of team experience · Delaware and Sydney
Flask development for APIs and services that stay easy to change.
We build Flask APIs, microservices and internal tools, take over Flask apps other teams wrote, and move old Flask and Python versions onto supported releases.
See how it works
- 15+Years of team experience
- 3Ways to engage: project, team or extension
- 60 minFree Flask development review, with a written plan
- 5.0/5Client satisfaction (CSAT)
Proven Success With
5.0/5 CSAT
New to Flask development?
What is Flask development?
We build new Flask services, take over existing ones and upgrade old Flask and Python versions.
Work runs as a fixed-scope project, a dedicated team or Flask engineers who join your team.
Starting point
Where are you with Flask?
What does your Flask work look like today?
- Path 01Nothing built yet
A new Flask build
You need an API, a microservice or an internal tool built and running.
- API design agreed before code
- Tests and CI from the first sprint
- Deployed to your cloud with logging
- Path 02We inherited an app
Taking over an existing Flask app
The developers who built it have moved on and documentation is thin.
- Code and dependency review
- Tests added around risky areas
- A written report of what we found
- Path 03It is out of date
Upgrading or modernizing
The app runs on Flask 1 or 2, or a Python version past end of life.
- Runtime moved to a supported Python
- Flask and extensions upgraded
- Async endpoints reviewed for FastAPI
A Flask application your team can run, change and support
What we do
What do our Flask development services include?
Build, take over, upgrade and staff Flask work, with one team that knows Python end to end.
New Flask applications
01APIs, internal tools and web apps built with tests and CI from the start.
REST APIs and microservices
02Versioned, documented APIs with SQLAlchemy models and Marshmallow schemas.
ML model serving
03Models wrapped in a Flask API with input checks, logging and monitoring.
Flask and Python upgrades
04Flask 1 or 2 moved to 3.1, and Python moved to a supported version.
Performance tuning
05Slow endpoints profiled, queries fixed and Gunicorn workers sized.
Testing and code quality
06pytest suites, type hints and linting added to code that has none.
Salesforce integration
07Flask services that read and write Salesforce data over its APIs.
Flask team extension
08Flask engineers who join your team and work in your process.
Stack
The Flask stack we work with
Flask stays small on purpose, so most of the work is choosing and wiring the pieces around it.
- Flask
- Werkzeug
- Jinja
- Flask-Login
- SQLAlchemy
- Marshmallow
- PostgreSQL
- Python
- Gunicorn
- Celery
- pandas
- pytest
- Poetry
- uv
- Docker
Upgrades
How do you upgrade an old Flask app?
Flask has no published long-term support policy, and Python 3.10 reached end of life in October 2026. Three common routes forward.
TodayFlask 1 or 2 on Python 3.10 or older
- Python 3.11 or later
Move the runtime first
Move the app to a supported Python, then upgrade Flask in a second step.
Python 3.11 is now the oldest version still getting security fixes.
- Flask 3.1
Upgrade Flask in place
Move to the current Flask release and update the extensions that changed with it.
Fits apps that work well and only need to stay supported.
- FastAPI
Move async APIs to FastAPI
Rebuild endpoints that wait on many slow calls in FastAPI, one route at a time.
Fits APIs that need async I/O. Flask keeps the rest.
Engagement
How can you work with our Flask engineers?
Three ways to engage. Each one is agreed in a written proposal before work starts.
- Fixed-scope project
We deliver a defined Flask build or upgrade.
- SynconAI directs the work to agreed milestones
- Billed by milestone, as set out in the proposal
- Working code, tests and documentation
- Fits a clear scope, such as an API or an upgrade
- Dedicated team
A Flask team that works only on your product.
- You set priorities, our lead runs the team
- Billed monthly for the team
- Engineers, a lead and testing as needed
- Fits ongoing product work with a changing backlog
- Team extension
Flask engineers who join your team.
- Your managers direct the day-to-day work
- Billed monthly for each engineer
- Vetted engineers, with employment and replacement handled by us
- Fits teams with a working process that need more hands
Process
How does a Flask engagement start?
Five steps from the first call to working code.
- Brief
- Call about your app and goals
- Code access or a written scope
- Match or design
- Engineers matched to your stack
- Plan and proposal in writing
- Start
- NDA, access and environment set up
- Codebase walkthrough and a first task
- Build and review
- Work shipped in short cycles
- Code review and demos with your team
- Hand over or continue
- Documentation and a handover session
- Or a monthly plan for ongoing work
Cost and timing
What it costs and how long it takes
The review is free
A 60-minute architecture review of your Flask setup, with a written plan you keep.
A fixed-scope proposal first
Before any work starts you get a written proposal: a fixed-scope project with milestones, or a monthly plan. You approve it, or you do not.
Timing follows scope
How long it takes depends on what is in scope. The proposal states the milestones, so you see the timeline before you commit.
Client stories
Client work we have delivered
Real engagements, described by industry. Each story covers the starting position, what we built and how we delivered it, end to end.
Commercial & Business ServicesA Subscription Estimator and Technical Library for Fire Protection ProfessionalsA Next.js web application for a fire protection business: a searchable technical library and estimator with role-based access, manufacturer filtering, PDF output and subscriptions, with AI product identification in development.Next.js · Custom web application · Authentication and roles · SubscriptionsRead the story 
Communications, Media & TechnologyA Bilingual Knowledge Base That Answers Callers During a Major International EventA bilingual English and Japanese knowledge base for contact centre operators at a major international event: live answer suggestions, cross-language search with translated embeddings, operator content management and missing-question tracking.Custom AI · Vector search · Translated embeddings · Large language modelsRead the story 
EducationOne Tutoring Calendar Across Salesforce and TeachWorksSalesforce development for an Australian tutoring provider: a custom session calendar, two-way TeachWorks appointment sync, attendance and completion mapping, and session notes into after-session reports.Salesforce Platform · Lightning Web Components · Apex · TeachWorks APIRead the story Client reviews
What clients say about working with our architects
See how teams describe working with SynconAI, from first scope to production delivery.
Salesforce Select Partner30+ Salesforce certificationsDelivery from Delaware & Sydney, worldwide
Simply Outstanding
“SynconAI Consulting are Simply the Best in the Business When it comes to Salesforce implementation and AI-powered solutions, SynconAI are in a league of their own. Their expertise, dedication, and ability to deliver results that truly move the needle sets them apart from every other consulting partner we've worked with. What they achieved with our Sales Cloud, Service Cloud, and custom Agentforce agent has completely transformed how we operate streamlining our pipelines and our customer service, and automating tasks that used to consume hours of our team's time. They don't just implement technology they transform businesses. If you want the best, you work with their team.”
Sales CloudService CloudAgentforce
Jack BennettConsumer Goods & Retail · United States
“I had a very urgent deadline for our project reporting to be delivered and needed to build the module, dashboard and output reports in Salesforce. SynconAI were very responsive - they met with me online, responded to my emails quickly and took calls - whatever was needed to progress the work quickly. We are thrilled with the outcome and will continue to work with SynconAI in the future to continue to build our Salesforce capability and platform.”
Sales CloudService CloudNonprofit Cloud
Salesforce Managed ServicesAustraliaSalesforce Verified
“The team at SynconAI were fantastic, and promptly delivered on each project. They were able to guide us through every stage and made sure we were satisfied with the outcomes on multiple scopes of work.”
Sales CloudSlackFlowAgentforceMuleSoft
ManufacturingAustraliaSalesforce Verified
“They have been great and helping us transform out business by bringing what I conceptualize to life. Great at translating process/workflow needs into a solution. Been a pleasure work with and they're a critical part of our team and will be instrumental into bringing about my vision.”
Sales CloudFinancial Services CloudArchitectureAI
Financial ServicesUnited StatesSalesforce Verified
“Working with SynconAI was a seamless and highly professional experience from start to finish. They took the time to deeply understand our business processes before designing and implementing a Salesforce solution tailored specifically to our operational needs. The team demonstrated strong technical expertise across Salesforce configuration, automation, integrations, reporting, and user experience design.”
SalesforceExperience CloudCustom DevelopmentAutomationReporting
Salesforce ImplementationSalesforce Verified
Frequently asked questions
Flask development, answered.
Straight answers about Flask builds, upgrades, engineers and how the work runs.
Building and supporting web applications and APIs with Flask, the Python web framework. We build REST APIs, microservices, ML model serving, internal tools and webhooks.
If it runs on Python 3.10 or older, yes. Python 3.10 reached end of life in October 2026. We move the runtime to a supported Python and Flask to the 3.1 line.
As a fixed-scope project with milestones, a dedicated team, or engineers who join your team. Scope, people and billing are agreed in a written proposal before work starts.
Yes. They work in your tools, standups and code review, and your managers direct the work. We handle their employment and any replacement.
Each engineer goes through a technical interview on Python and Flask, a practical code task and a review with a SynconAI lead. You can interview them before they start.
Yes. We use simple-salesforce, a community Python library, or the Salesforce REST and Bulk APIs directly, with OAuth 2.0 for sign-in.
Our hubs in Delaware and Sydney cover United States and Australian working hours, and we deliver remotely worldwide on your business hours. Overlap hours with your team are agreed before work starts.
Flask is a trademark of the Pallets project. Python is a trademark of the Python Software Foundation. Salesforce is a trademark of Salesforce, Inc. Other names are trademarks of their owners. SynconAI is an independent consulting firm and is not affiliated with or endorsed by these organizations.
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