Custom Software Development Services
Software built around your business, not the other way around
When the off-the-shelf platform stops fitting the way your business actually works, you outgrow it or you fight it. We build the software that fits: 500+ active clients, 1,480+ projects delivered, teams staffed from the top 1% of LATAM engineering talent.
Meet your engineering team
Senior by policy, not by exception
Our custom software developers are senior by policy. The software developers, architects, and QA engineers you meet in scoping are the people who build your software, with project management run by a dedicated technical PM per engagement. No handover to a junior bench after signature.
Federico S.
Buenos Aires, AR
Engineering Manager
Manuel C.
Buga, CO
Sr. Software Engineer
Lucas G.
Rio de Janeiro, BR
Sr. Full-Stack Engineer
Bruno S.
São Paulo, BR
Sr. Back-End Engineer
Ricardo A.
Buenos Aires, AR
Sr. QA Engineer
André P.
São Paulo, BR
Sr. Front-End Engineer
Gustavo A.
Marília, BR
Sr. DevOps Engineer
Javier V.
Quito, EC
Sr. Software Architect
Yuri B.
Blumenau, BR
Tech Lead
Diego N.
João Pessoa, BR
Sr. Mobile Engineer
Matheus C.
Rio de Janeiro, BR
Sr. Software Engineer
What are custom software development services?
Custom software development services cover the design, build, integration, and maintenance of software created for one company's specific processes, rather than licensed off the shelf. A custom software development company handles the full software development lifecycle: understanding your business processes, architecting the system, building it, connecting it to your existing IT ecosystem, and evolving it after launch. Companies choose custom, also called bespoke software or custom application development services, when packaged software cannot match how they operate, price, or scale.
Most software decisions start the same way: a process that spreadsheets and SaaS subscriptions used to handle has become the bottleneck. The pricing logic your team actually uses does not exist in any vendor's feature list. The three systems that run your operation do not talk to each other. You have evaluated the market and the honest conclusion is that nothing off the shelf fits without bending your business around it.
That is the point where custom software development pays for itself. You get software shaped to your workflows instead of workflows shaped to your software: no vendor lock-in deciding your roadmap, no per-seat licensing model deciding how your team grows, and full ownership of the code and the data.
Every engagement starts from your business objectives, not a feature list, and is judged on measurable business outcomes: cycle time cut, cost per transaction down, revenue unlocked. BairesDev has built custom software since 2009 as part of our broader software development services. Our engineers work in your time zone, join your standups, and ship production software across 100+ technologies. The sections below show exactly what we build, how long it takes, how the process runs, and the results clients measured. If you only read one thing, read the case study numbers: they are specific because the work is real.
Custom software development solutions
What we build: custom software development solutions
Five kinds of custom software work, each starting from a different problem. Most engagements begin in one and grow into another.
New platforms
Your operation runs on a process nobody else has, so no vendor builds software for it. We take it from whiteboard to production: discovery, architecture, build, launch. Typically: operations platforms, customer portals, marketplaces, and internal tools that replace spreadsheet sprawl. At organisation scale it is enterprise software development.
Legacy modernization
The system works, which is exactly why nobody dares touch it, and why it costs more every year. We modernize legacy systems incrementally: stabilize, add test coverage, carve out services, then migrate the legacy application. No big-bang rewrite, no frozen roadmap while it happens.
Integration and APIs
Your ERP, CRM, and data platform each hold a piece of the truth. We build the integration layer that makes them one system: custom APIs, ETL pipelines, and connections to third-party and SaaS platforms, including the legacy software nobody has documentation for.
Web & mobile
Web development and mobile app development, or both from one codebase. Our mobile development teams ship native and cross-platform apps, and the same software architecture discipline applies whether the surface is a browser or a phone.
Product development
You are taking software to market, not just running it internally. We handle product engineering end to end: MVP development, build, iteration against user data, and the scaling work when it succeeds (see the Pinterest result below: a team that grew from 5 to 233 as the product did).
Custom software development capabilities
Custom software development capabilities
Around every build sits the engineering that keeps it alive. Our custom software development capabilities span the full software lifecycle:
Software Architecture
Agile Delivery
Quality Assurance and Test Automation
Data Management
Cloud Computing
Integration and APIs
Security and Compliance
Observability
We model your domain before we pick a stack: service boundaries, data ownership, and the integration seams that decide whether year two is an extension or a rewrite. Multi-region, audited and governed is a decision made at the first diagram, not retrofitted. Architecture decisions are written down with their tradeoffs so your team can challenge them.
Software Architecture
We model your domain before we pick a stack: service boundaries, data ownership, and the integration seams that decide whether year two is an extension or a rewrite. Multi-region, audited and governed is a decision made at the first diagram, not retrofitted. Architecture decisions are written down with their tradeoffs so your team can challenge them.
Agile Delivery
Two-week sprints with working software at the end of each one, tuned to your release cadence rather than a textbook. Our agile development services put your product owner in planning and review, and scope moves in the open instead of in a change request.
Quality Assurance and Test Automation
Automated tests are written with the feature, not after it. Our QA and testing services cover unit, integration and end-to-end suites on every commit, with automated software testing on the paths your business cannot afford to break.
Data Management
Schema design, migration, and the pipelines that move data between systems without losing it. Our data management services handle warehouse and lake architectures, retention rules, and the query performance work that keeps reporting usable past the first million rows.
Cloud Computing
Infrastructure as code on AWS, Azure, or GCP, with autoscaling sized to real traffic. Where systems still sit on owned hardware we run the cloud migration first, then multi-region and disaster recovery where uptime requirements justify them.
Integration and APIs
Security and Compliance
Controls built into the pipeline from sprint one: dependency and secret scanning, least-privilege access per engineer, and environments segregated from production data. Our cybersecurity services and penetration testing services cover HIPAA, SOC 2 and PCI-DSS requirements by design rather than by audit at the end.
Observability
Logs, metrics, traces, and SLO alerting wired into the tools your team already runs, set up by the same DevOps development services team that builds your pipeline. When something breaks at 3am, the on-call engineer gets a signal that points at the cause instead of a dashboard that says the site is slow.
Custom vs off-the-shelf: the honest comparison
| Decision factor | Custom software | Off-the-shelf |
|---|---|---|
| Fit to your processes | Built around them | You adapt to the vendor's model |
| Commitment model | A scoped build you own outright | A subscription relationship with the vendor |
| Vendor lock-in | None: you own code, data, and roadmap | Roadmap, pricing, and data portability are the vendor's call |
| Integration depth | Native to your stack, including legacy systems | Limited to the vendor's connectors |
| Competitive differentiation | Yours alone | Same tool your competitors use |
| Time to first value | Weeks to months (kickoff in 2-4 weeks) | Days |
The integration column usually decides it: seamless integration with what you already run is where packaged tools quietly fail and custom quietly wins.
When off the shelf software wins: commodity processes (payroll, email, accounting) where your way of doing it is not a differentiator. We say so in scoping calls, and it is why discovery comes before any build.
Scope, timeline, and team size
| Project scenario | Custom software | Typical team |
|---|---|---|
| MVP or focused internal tool (single workflow, few integrations) | 8-16 weeks | 3-6 engineers |
| Operations platform of average complexity (multi-role, 2-4 system integrations) | 4-7 months | 6-10 engineers |
| Customer-facing product at scale (high availability, security review, analytics) | 6-10 months | 8-15 engineers |
| Enterprise multi-system build (legacy modernization + integration layer + compliance) | 9-18 months | multiple coordinated pods |
Every custom software project gets scoped against these bands in the first call, so the project has a plan before it has a backlog. What moves the bands: integration count, compliance regimes (HIPAA, SOC 2, PCI-DSS), data volume, and how much of the legacy estate must keep running during the transition.
Engagement structure matters too: staff augmentation embeds engineers in your team, dedicated teams run as a pod, and full outsourcing owns the outcome.
Case study results
Results clients measured
Every engagement below has a case study you can read in full. See all client case studies.
Our custom software development process
From first call to production in three phases
Discovery starts within 24 hours of contact and kickoff lands 2 to 4 weeks from signature. After that you see working software every sprint.
Phase 1: Scope and team
Phase 2: Build in production rhythm
Phase 3: Run and evolve, with post-launch support built in
Discovery call within 24 hours of contact. We define measurable outcomes, constraints, and the KPIs that will judge the build. Team assembled and onboarded in 2 to 4 weeks from signature.
Phase 1: Scope and team
Discovery call within 24 hours of contact. We define measurable outcomes, constraints, and the KPIs that will judge the build. Team assembled and onboarded in 2 to 4 weeks from signature.
Phase 2: Build in production rhythm
The development process is agile without the ceremony: CI/CD, automated testing, and security scans stand up in parallel with sprint one, not after it. Small frequent releases, TDD on features and APIs, and zero-downtime deployment with canary releases. You see working software every sprint, with reviews at week 4 and week 8.
Phase 3: Run and evolve, with post-launch support built in
Post-launch, the same team handles observability (logs, metrics, SLO alerts), performance, and the next roadmap items. Typical full builds run 6 to 10 months from kickoff to launch, and the engagements that go well keep going: Instructure and Pinterest both grew from a first team into a standing one.
Flexible engagement models
Three ways to bring engineers onto your build
Pick the model that matches how much of the delivery you want to own. All three kick off in 2 to 4 weeks from signature.
Staff augmentation services
Senior engineers embedded alongside your in-house development team, on your hours, in your standups, following your workflow. Use it when you have a team and a roadmap but not enough senior capacity.
Dedicated software development team
A delivery-ready pod with a technical PM driving velocity, for full builds or parallel workstreams. Use it when the build needs its own delivery rhythm alongside your product.
Software outsourcing services
You define the outcomes, we own execution end to end from planning through deployment. Use it when you want to hand over the delivery problem entirely.
AI-augmented engineering
Every engineer we staff builds with AI tooling as standard
Every developer we staff works with artificial intelligence coding assistants as standard development tools, with the output held to the same quality bar as any other code. Where the product itself needs AI, from recommendation engines to computer vision, the same teams build it into the platform rather than bolting it on. Digital solutions only count when they ship.
The test we apply before starting any build, and the three ways it pays back.
Custom software is a business decision before it is a technical one, and custom software development projects should be judged like any other investment. If we cannot name the metric it moves, we do not start the build.
Done right, custom software solutions compound in three ways. Operational efficiency, because the software automates your business operations exactly as they run rather than approximately. Competitive advantage, because the capability is one your competitors cannot buy. And business value you can put a number against, in the same terms your business goals are already reported in.
That is the standard we hold on complex business challenges. We develop custom software for one specific business rather than for a market segment, which is what separates tailored software solutions from software solutions sold by the seat. We build software tailored to how you actually operate and deliver custom software solutions your team can keep running after we leave: custom solutions, not configured ones.
So the phrase to watch for is not innovative solutions, and it is not tailored solutions either. It is whether a partner can turn business challenges into working systems and deliver solutions that survive contact with your operation. That is what digital transformation means for a specific company, and the case study numbers above are what custom development looks like when it pays back.
Industries
Where our custom builds concentrate
Compliance regimes and integration surfaces differ enough by industry that the architecture changes with them. These six are where most of our custom work sits.
Core systems that carry regulatory weight: payments, lending workflows, and the reporting that auditors read. Built for traceability first, because retrofitting an audit trail costs more than designing one.
Build solutions for:- AML/KYC automation
- Payment orchestration and reconciliation
- Regulatory reporting pipelines
Technology stack
Proven technology, chosen for what it has to run
We are deliberately boring about technology choices: proven over cutting edge technologies for core systems, and industry leading solutions only where benchmarks earn the label. 100+ technologies covered.
500+
Active Clients1,480+
Projects96%
Client Retention4,000+
Engineers
About BairesDev
Building custom software since 2009
We are a nearshore software development company with engineers across Latin America working in US time zones. Since 2009 we have delivered custom software for clients ranging from Fortune 500 platform rebuilds to first products for funded startups. Most clients stay past the first engagement, which is the metric we watch most closely.
Awards and recognition
Independently recognized
Recognized for how we deliver
Independent rankings and verified client reviews, not self-published badges.
- 1,480+projects
delivered - 3+years average
engagement
FT Fastest-Growing 2025 
CIO100 2025 
Clutch Nearshore 2025 
IAOP 2024
Custom software development FAQ
Custom software development questions, answered
How big a team does a custom software project need?
Focused internal tools run with 3-6 engineers, customer-facing products at scale with 8-15, and enterprise multi-system builds with multiple coordinated pods. Real examples: Pinterest grew from 5 to 233 developers as the Ad Manager scope grew; Instructure ran 56 senior developers alongside their internal teams. The scope table above breaks the bands down by scenario, and staff augmentation services cover the case where you only need to top up an existing team.
How long does custom software development take?
Kickoff happens in 2-4 weeks from signature, and typical full builds run 6 to 10 months to launch. Our measured examples: 5 months for the Rolls Royce nuclear monitoring app, and multi-year standing teams at Instructure and Pinterest once the first build proved out.
Custom software or off-the-shelf: how do we decide?
Choose off-the-shelf for commodity processes where your approach is not a differentiator. Choose custom when packaged tools force workarounds in a process that IS your edge, when subscription costs scale painfully with headcount, or when integration with your existing systems is the hard part. The comparison table above covers the tradeoffs factor by factor.
Who owns the code and IP?
You do, fully and from the start. Standard MSAs assign all work product to you: code, documentation, and data. There is no license back to us and no dependency on us to keep running it.
What happens after launch?
The team that built your software can stay on it: monitoring, performance, security patches, and roadmap work under the same engagement, or a structured handover to your in-house team with documentation and pairing. Around 96% of our clients continue past their first engagement.
How do you protect sensitive data during development?
Access controls scoped per engineer, environments segregated from production data, and compliance-specific controls (HIPAA, SOC 2, PCI-DSS) built into the pipeline from sprint one rather than audited in later, with penetration testing services run before launch on anything internet-facing.
How senior are the engineers on custom builds?
Custom projects get senior engineers vetted through technical tests, English assessments, and problem-solving simulations; fewer than 1% of the 2M+ yearly applicants join BairesDev. Typical custom-build team members carry 8-15 years of experience, like the profiles above.
What is your experience with enterprise software development?
Our enterprise software development services cover new enterprise applications and modernization of existing enterprise software: multi-system integration, compliance regimes, and governance. Dedicated teams deliver at this scale with the same 2-4 week kickoff and plug into your existing vendor-onboarding protocols.
Can you take over a half-built or inherited codebase?
Yes, and it is common: an audit sprint first (code quality, test coverage, security), then a stabilization plan before new features. Rescue projects follow the same legacy application migration playbook: stabilize, cover with tests, then evolve.
Have a build in mind? Talk it through with an engineer, not a salesperson.
