SAAS DEVELOPMENT SERVICES
Build custom SaaS solutions with experts trusted by 1500+ companies.
Looking for a partner with proven SaaS expertise? Our SaaS development services power some of the world's leading platforms. Work with us to build scalable SaaS applications, modernize existing solutions, and accelerate product launches.
Sr. SaaS Architect
Leandro C.
17 years of experience
Previous Client
Sr. Backend Engineer
Renata V.
11 years of experience
Previous Client
Sr. DevOps Engineer
Ignacio F.
9 years of experience
Previous Client
Sr. API Architect
Matías P.
12 years of experience
Previous Client
Sr. Security Engineer
Tomás D.
16 years of experience
Previous Client
SAAS APP DEVELOPMENT SERVICES
No matter what you're building, we can help.
Our SaaS development services span the full product lifecycle, from design and architecture to post-launch optimization. Whether you're launching a new SaaS platform or scaling an existing one, we deliver the engineering expertise to move fast without accumulating technical debt.
SaaS Architecture & Strategy
Most SaaS failures trace back to architecture decisions made too early or without enough context. We work with your product and engineering leaders to design multi-tenant systems that balance isolation, performance, and cost from day one.
Our architects map tenant boundaries, define data partitioning strategies, and establish scaling patterns before code is written. This includes designing for horizontal scale, implementing tenant-aware caching, and building monitoring that tracks per-tenant resource consumption. You get a foundation that supports growth without expensive re-platforming.
Custom SaaS Application Development
Generic frameworks and templates can't handle the complexity of enterprise SaaS product development. Our custom software development process is designed to address your specific business model, whether that's usage-based billing, tiered access, or complex hierarchies.
Our teams use domain-driven design to isolate core business logic from infrastructure concerns. We implement feature flags for gradual rollouts, build admin interfaces for tenant management, and design APIs that support both internal services and external integrations. The result is a maintainable codebase that evolves with your product roadmap.
Multi-Tenant Architecture Development
Building for multiple tenants means solving data isolation, resource allocation, and tenant customization without compromising security or performance. We design and implement multi-tenant systems using proven patterns—pooled databases with tenant identifiers, separate schemas per tenant, or fully isolated instances depending on your requirements.
Our approach includes implementing row-level security, designing tenant-aware middleware, and building administrative tools for provisioning and deprovisioning. We also handle cross-tenant analytics and reporting while maintaining strict data boundaries. You get scalable multi-tenancy that meets both security and cost targets.
SaaS API Development & Integration
APIs are the contract between your platform and everyone who builds on it. We design REST and GraphQL APIs with versioning strategies, rate limiting, and tenant-scoped authentication that support both internal microservices and external developers.
Our teams implement webhook systems for event-driven integrations, build API gateways for centralized policy enforcement, and create developer portals with interactive documentation. We also handle integrations with third-party platforms like Stripe, SendGrid, and Twilio. This gives you extensibility without sacrificing stability.
SaaS Migration & Modernization
Legacy on-premises applications weren't built for the multi-tenant, subscription-based model that today's market demands. Many businesses face challenges during migration including data loss and performance issues. We migrate monolithic systems to cloud-native SaaS architectures while maintaining business continuity.
Our process includes extracting business logic into services, implementing tenant data models, and building billing and subscription management. We execute migrations incrementally, running old and new systems in parallel until validation passes. This reduces risk, preserves revenue, and positions you for faster feature delivery.
SaaS Security & Compliance
SaaS platforms handle sensitive data for hundreds or thousands of tenants, making security and compliance non-negotiable. We understand and comply with GDPR and HIPAA data privacy regulations. We implement defense-in-depth strategies including tenant data encryption, audit logging, and role-based access control.
Our security work covers both application-level controls and infrastructure hardening. We provide evidence of compliance with ISO 27001 and industry-specific standards, implement automated security scanning in CI/CD pipelines, and build admin tools for compliance reporting. You get audit-ready security without slowing feature velocity.
SaaS DevOps & Release Automation
High-velocity SaaS teams need deployment pipelines that support multiple releases per day without downtime. We build GitOps workflows with automated testing, security scanning, and progressive rollouts.
Our DevOps engineers implement blue-green deployments, canary releases, and feature flags to decouple deployment from release. We set up observability with distributed tracing and tenant-level metrics, and build runbooks for incident response. You get the infrastructure to ship fast while maintaining stability.
Subscription & Billing Systems
Managing subscriptions, usage metering, and billing across hundreds of tenants requires specialized systems. We integrate with platforms like Stripe, Chargebee, and Zuora, or build custom billing engines for complex pricing models.
Our implementations handle plan upgrades and downgrades, prorated billing, usage-based pricing, and dunning workflows. We build admin dashboards for finance teams and self-service portals for customers. This gives you accurate revenue recognition and reduces support overhead.
SaaS case studies
Hundreds of SaaS projects delivered.
From pilot to scale, we have the experience to build SaaS platforms that deliver real value. It's why 500+ clients choose us as their SaaS development company.
- E-LEARNING
Maintained and Launched New Features for Instructure's Canvas LMS Platform
Instructure needed engineering expertise to maintain and enhance Canvas, the leading Learning Management System serving tens of millions of educators. We provided 56 specialists including QA, back-end, and front-end engineers over a 3.5-year engagement. The team spotted bugs across a large codebase and launched a well-tested list of features. Our work helped Instructure support over 7,000 institutions worldwide.
- React
- Node.js
- .NET
- Ruby
- PHP
- HUMAN RESOURCES
Migrated HR Platform to Microservices and Developed Mobile Apps for Limeade
Limeade needed to migrate their mobile-first HR platform to microservices and unify three solutions into Limeade ONE. We provided a team of engineers over a 5-year engagement to handle web app development, legacy support, and database administration. The team migrated to microservices, developed Android and iOS apps with Xamarin, and created Tableau dashboards. Our work helped Limeade scale their employee well-being platform faster.
- React
- .NET
- Azure
- Xamarin
- Tableau
- NON-PROFIT
Developed MVP and Data Pipelines for iWave's Fundraising Intelligence Platform
iWave needed to replace a platform that was becoming difficult to scale and maintain. We developed the MVP, set up ETL data pipelines on AWS, and optimized the new platform for mobile over a 2.5-year engagement. The team built a robust backend that laid the foundation for future innovation and growth. Our work gave iWave's clients faster and more reliable fundraising intelligence results.
- Amazon Web Services
- C#
- .NET
- Vue
- MySQL
MARKETING & ADVERTISING
NextRoll’s SaaS ad platform runs 100K ad auctions per second with ML tech we built
- 7-Year Engagement
- 48 Specialists
- 10/10 NPS Score
NextRoll needed engineers with in-depth knowledge of statistical tools to hone its machine-learning tech used to launch about 100,000 ad auctions per second on autopilot. We brought in dozens of Latin American engineers to fill technical gaps across Data Science, BI, Applications, RTB, Infrastructure, Solutions Engineering, and Big Data teams.
Increased the number of Shopify customers joining NextRoll's platform by 60%
Scaled our engagement to 48 nearshore engineers working across 7 internal teams
Helped NextRoll serve 50 billion ad impressions per day
Get expert help for your SaaS project.
“Their engineers perform at very high standards. We've had a strong relationship for almost 7 years.”
OUR SAAS DEVELOPMENT TEAMS
Meet the SaaS development experts behind our best work.
Behind every successful SaaS platform is a highly specialized team. That's why we have experts for every stage of SaaS development, from multi-tenant architecture and backend engineering to API design, DevOps automation, and security hardening.
- Kubernetes
- Terraform
- PostgreSQL
- AWS Certified Solutions Architect – Professional
- Google Professional Cloud Architect
- Node.js
- Python
- .NET Core
- AWS Certified Developer – Associate
- Microsoft Certified: Azure Developer Associate
- Docker
- Jenkins
- Argo CD
- AWS Certified DevOps Engineer – Professional
- Certified Kubernetes Administrator
- REST
- GraphQL
- API Gateway
- AWS Certified Solutions Architect – Associate
- Apollo Graph Developer Associate
- HashiCorp Vault
- OWASP
- Snyk
- AWS Certified Security – Specialty
- Certified Information Systems Security Professional (CISSP)
Onboard a SaaS development team in weeks, not months.
About BairesDev
Why work with BairesDev? We’re trusted by the world’s top tech teams.
BairesDev is a US-based company powered by LATAM dev teams. Since 2009, we’ve built software for companies of all sizes—from scrappy startups to Fortune 500 giants. In fact, we’re one of the fastest-growing software development companies in the world. If you’re looking for onshore quality with nearshore benefits, we’re the partner for you.
1250+
Projects
Delivered
4000+
Developers
On Staff
96%
Client Retention
Rate
500+
Active
Clients
How we work
Here's what makes us easy to work with and hard to replace:
From code quality to compliance, we’ve optimized every part of how we work to support high-performing engineering teams. For you, that means clearer communication and smoother delivery. Plus, get peace of mind from having a development partner you can depend on.
Work with our SaaS development experts
- Vetted Senior TalentWe hire the top 1% of over two million applicants, so you only work with the best.We give you engineers who’ve already proven they can deliver. Our rigorous evaluation process includes technical tests, English assessments, soft skill screening, problem-solving simulations, and more. Out of over 2 million applicants who apply yearly, fewer than 1% get the chance to join our team. This is how we ensure you get highly qualified developers who are experts in their fields.
- Timezone AlignedWe work your team’s hours, which creates faster feedback loops and fewer blockers.Our nearshore software engineers share your workday, answering Slack messages, joining daily stand-ups, and presenting demos in real time. Project management is streamlined, questions are answered quickly, blockers are resolved as they come up, and simple code reviews take minutes, not days.
- Proficient in EnglishOur engineers have strong English skills, so communication and documentation are clear.Our engineers have 8+ years of experience collaborating with US teams. They excel at articulating complex technical concepts to diverse stakeholders, producing meticulous documentation, and driving technical discussions. This eliminates the ambiguity common with global teams.
- Full-stack CapabilitiesWith expertise in 100+ technologies, we have every specialist your project requires.We cover architecture, development, testing, DevOps, and everything in between—reducing hand-offs and creating better architecture decisions for a smoother path from concept to production.
- Scalable TeamsOur bench strength lets you scale engineering teams to meet new demands in weeks.With 4,000+ engineers on staff and thousands more in our pipeline, we can spin up pods or scale multiple teams across your company in days—so you hit aggressive timelines without bottlenecks.
- Standard MSAs & SOWSWe’re easy to onboard because we work the way your legal team expects us to.Because we’re based in the US, we follow the same legal standards your team already trusts—using MSAs, SOWs, and documentation that fit your procurement process.
- NDAs & IP ProtectionWe take data and IP seriously, with full protection baked into every engagement.Every engagement begins with a mutual NDA and clear IP ownership terms. Our secure workflows and confidentiality protocols also protect existing codebases and proprietary data.
- Enterprise-grade SecurityOur devs follow security protocols that meet even the strictest enterprise standards.Our engineers work only within the systems they need, using strict access control, audit-friendly workflows, secure repository storage, and more—bringing enterprise-grade protection to every engagement.
- Managed DeliveryWe actively track our devs’ work to make sure they consistently meet expectations.Delivery managers monitor progress, resolve blockers, and report regularly, so you never have to chase updates or second-guess performance.
Work with our SaaS development experts
Flexible engagement models
Need SaaS development expertise?
Plug us in where you need us most.
We customize every engagement to fit your workflow, priorities, and delivery needs.
- Need a couple of extra software engineers on your team?
Staff Augmentation
Get senior, production-ready developers who integrate directly into your internal team. They work your hours, join your standups, and follow your workflows—just like any full-time engineer.
- Need a few teams to deliver several projects in simultaneously?
Dedicated teams
Spin up focused, delivery-ready pods to handle full builds or workstreams. Together we align on priorities. Then our tech PMs lead the team and drive delivery to maintain velocity and consistency.
- Want to offload everything to us, from start to finish?
Software outsourcing
Hand off the full project lifecycle, from planning to deployment. You define the outcomes. We take full ownership of the execution and keep you looped in every step of the way.
Kick off SaaS development projects in 2-4 weeks.
We have reps across the US.
Speak with a client engagement specialist near you.
- Discuss solutions and decide team structure.
Tell us more about your needs. We'll discuss the best-fit solutions and team structure based on your success metrics, timeline, budget, and required skill sets.
- Onboard your team and get to work.
With project specifications finalized, we select your team. We're able to onboard developers and assemble dedicated teams in 2-4 weeks after signature.
- We track performance on an ongoing basis.
We continually monitor our teams' work to make sure they're meeting your quantity and quality of work standards at all times.
SAAS SOLUTIONS
Build with SaaS developers who have experience in your industry.
We've delivered projects across 130+ industry sectors. You won't have to spend weeks getting us up to speed. Our developers come in with a clear understanding of your industry's data complexity, compliance requirements, and SaaS platform’s unique needs.
SAAS DEVELOPMENT CAPABILITIES
We cover the SaaS development stack (and everything around it).
As a top SaaS development company, we use a modern tech stack built for performance and scale, with a focus on proven tools. Our expertise spans 100+ technologies, so we're equipped to support your full roadmap: SaaS and beyond.
API Design and Management
Authentication and Authorization
We implement secure authentication flows with multi-factor authentication, single sign-on, and role-based access control. Our systems support OAuth 2.0, SAML, and custom identity providers.Auth0OktaAWS CognitoAzure ADKeycloakOAuth 2.0OpenID ConnectSAMLSubscription and Billing
We integrate with payment processors and billing platforms to handle subscriptions, usage metering, invoicing, and revenue recognition. Custom implementations support complex pricing models and billing workflows.StripeChargebeeZuoraPayPalRecurlyCI/CD and DevOps
We automate testing, security scanning, and deployment using GitOps workflows. Our pipelines support blue-green deployments, canary releases, and feature flags for controlled rollouts.GitHub ActionsGitLab CICircleCIArgo CDSpinnakerAnsibleMonitoring and Observability
We instrument SaaS applications with distributed tracing, metrics, and log aggregation. Our observability stack provides tenant-level insights, SLA tracking, and automated alerting.DatadogNew RelicPrometheusGrafanaELK StackSplunkOpenTelemetrySentrySecurity and Compliance
We implement security controls, including encryption at rest and in transit, audit logging, and vulnerability scanning. Our systems support SOC 2, HIPAA, GDPR, and ISO 27001 compliance.HashiCorp VaultAWS KMSSnykOWASP ZAPQualysNessusVantaDrata
SAAS DEVELOPMENT PROCESS
How we deliver SaaS solutions that drive business value:
We've refined our SaaS development services across hundreds of projects using Agile methodology for faster iteration and flexibility. Whether you need end-to-end execution or support for an internal team, we step in wherever you need us to move projects forward without friction.
Discovery & Product Strategy
We define business goals and models with stakeholders, building prototypes to validate concepts early. We translate these into technical requirements that prevent feature creep and guide architecture.
Multi-Tenant Architecture Design
We design tenant isolation models, data partitioning, and resource policies to support growth. We determine the right mix of shared databases or isolated instances to balance security, compliance, and cost.
Technology Stack Selection
We select frameworks and cloud services based on performance and long-term maintenance needs. Our recommendations balance proven stability with modern capabilities, considering security, support, and costs.
Core Platform Development
Using domain-driven design, we isolate business logic from infrastructure for a maintainable codebase. We implement feature flags, admin interfaces, and APIs to ensure your platform evolves with your roadmap.
API Design and Implementation
We design versioned REST or GraphQL APIs with secure authentication and rate limiting. Contracts are documented via OpenAPI and validated with tests. We also build developer portals to support external integration.
Security and Compliance Implementation
We implement encryption, audit logging, and RBAC while handling infrastructure hardening. We document policies and build compliance reporting tools to ensure you meet audit requirements and security standards.
Integration and Third-Party Services
We connect your platform to payment, email, and analytics APIs using retry logic and circuit breakers for reliability. We also implement webhook systems and admin tools to manage these integrations gracefully.
Performance Optimization and Load Testing
We profile performance to identify query inefficiencies and latency. Through load testing, we validate traffic capacity, optimize database indexes, and tune auto-scaling policies to ensure fast response times.
CI/CD Pipeline and Deployment Automation
We build automated pipelines that run tests and security scans on every commit. Using blue-green releases and feature flags, we decouple deployment from release to allow for controlled rollouts and quick rollbacks.
Launch and Tenant Onboarding
We deploy to production with full monitoring and incident response procedures. We onboard initial tenants while observing system behavior, collecting feedback, and addressing issues quickly to ensure a smooth launch.
Monitoring and Continuous Improvement
We monitor performance, usage patterns, and costs post-launch. We run continuous testing, security audits, and feature upgrades to maintain competitiveness. We track SLAs and error rates. Reviews guide prioritization.
Client testimonials
Get SaaS results you can stand behind.
Our work holds up in reviews, in production, and in front of the board.
Global companies have trusted us to build and scale custom SaaS platforms for over a decade.
Excellence.
Our minimum bar for client delivery.
Over 130 awards, accolades, and achievements showcase our quality and commitment to client success.
- 1,250+projects
delivered - 130+industry
sectors
America's Fastest-Growing Companies 2025 by Financial Times Top 100 U.S. IT Innovators 2025 by CIO100 Awards Nearshore North America Top Software Developers 2025 by Clutch Top 100 Global Outsourcing Providers 2024 by IAOP Global Outsourcing 100
What tech leaders ask about our SaaS development services:
How quickly can you staff a SaaS development team?
We typically staff SaaS development teams within 2–4 weeks. Our 4,000+ engineer bench includes specialists with multi-tenant architecture, API design, cloud infrastructure, subscription billing, and DevOps experience. This allows us to assemble the right team quickly based on your specific needs.
What level of experience do your SaaS developers bring?
We screen over 2 million applicants annually and hire less than 1%. We only select senior engineers with 8–10+ years of proven experience. Our SaaS developers have built platforms serving thousands of tenants, designed subscription and billing systems, implemented role-based access control across complex hierarchies, and optimized multi-tenant databases for scale. They understand tenant isolation patterns, API versioning strategies, and how to balance feature velocity with architectural integrity.
Will your team work in our time zone and integrate with our processes?
Yes. Our nearshore SaaS development teams work US business hours, communicate in English, and participate fully in your standups, sprint planning, and reviews. We adopt your tools (GitHub, Jira, Slack, Figma), follow your branching strategies and code review processes, and operate as an extension of your team from day one.
Can you work with our existing SaaS platform and tech stack?
Absolutely. Our engineers have worked with legacy monolithic SaaS applications, modern microservices architectures, Rails apps, Django platforms, .NET systems, and Node.js backends. We audit existing code, identify performance bottlenecks and security gaps, and propose incremental improvements that don't disrupt ongoing development.
Do you have experience building SaaS products for regulated industries?
Yes, we're ISO 27001 certified and have provided SaaS application development services for healthcare, finance, government, and other regulated sectors. Our solutions have included HIPAA-compliant data handling, SOC 2 controls, GDPR data residency requirements, and audit logging for compliance reporting. With hundreds of projects delivered in highly regulated industries, our teams have the experience to meet strict regulatory requirements without slowing feature delivery.
How long does it take to build a basic SaaS application?
A basic SaaS application typically takes four to six months from discovery to launch. The timeline depends on feature complexity, integration requirements, team size, and requirements. We often work in Agile sprints to deliver functionality incrementally, so you can validate progress and adjust priorities throughout development.
Can you integrate our SaaS platform with third-party services and APIs?
Yes. We build integrations with payment processors like Stripe and PayPal, communication tools like SendGrid and Twilio, analytics platforms, CRM systems, and custom APIs. Our engineers implement webhook systems for event-driven workflows, design retry logic and circuit breakers for reliability, and build admin interfaces for managing integrations. We also create developer portals when your platform needs to support external integrations.
How do you maintain team stability over long engagements?
We're structured for long-term partnerships. Most engineers stay on SaaS projects for 2+ years, and our 96% client retention rate shows organizations continue working with us year after year. When team adjustments are needed, our bench depth allows us to add specialists or backfill roles quickly while maintaining project momentum through documentation and structured handoffs.
How do you ensure data portability in SaaS applications?
We design data export functionality that retrieves data in standard formats like CSV, JSON, and XML. This ensures data portability if you need to switch providers or integrate with other systems. Our SaaS solutions include automated backup processes and API endpoints for bulk data extraction, giving you full control over your data.
Do you handle contracts and billing in the US?
Yes. We operate from US headquarters under US law and jurisdiction. All contracts, billing, and procurement flow through domestic channels, eliminating international complications.
Useful SaaS resources
See why the biggest names in tech choose our SaaS development services.
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