CAPABILITY 01
Web application development
Responsive, accessible applications with modern front-end frameworks and clean, maintainable back ends.
ReactTypeScriptNode.jsPython
Home / Capabilities / Software Development & DevSecOps
Engineering delivery
Software Development & DevSecOps
Modern software, delivered securely and continuously.
SIS builds and modernizes web applications, APIs, and integrations using agile delivery, automated testing, and secure CI/CD pipelines — so quality and security are part of every commit.
Web application developmentAPIs & microservicesLegacy modernizationCI/CD pipelines
Overview
Modern software, delivered securely and continuously.
Good software is small batches, fast feedback, and nothing deployed that hasn't been tested and scanned. SIS pairs development with built-in quality engineering, because our roots are in verification and validation.
We build user-centered applications, modernize legacy systems incrementally, and leave behind maintainable code, pipelines, and documentation.
Focus areas
- Web application development
- APIs & microservices
- Legacy modernization
- CI/CD pipelines
- DevSecOps
- Systems integration
What's possible
Capabilities across software development & devsecops.
The technical areas SIS can support, and what each makes possible for your mission.
CAPABILITY 02
APIs & microservices
Well-documented REST and event-driven services with versioning, authentication, and rate limiting.
RESTOpenAPIGraphQLEvent-driven
CAPABILITY 03
Legacy modernization
Incremental replacement of legacy applications using strangler patterns, API wrappers, and data migration.
Strangler patternRefactoringAPI wrappingRe-platforming
CAPABILITY 04
CI/CD pipelines
Automated build, test, scan, and deploy pipelines with approvals and audit trails.
GitHub ActionsJenkinsGitLab CIAzure DevOps
CAPABILITY 05
DevSecOps
Static and dynamic analysis, dependency and container scanning, secrets detection, and SBOMs in the pipeline.
SAST / DASTSCASBOMSecrets scanning
CAPABILITY 06
Systems integration
Connect applications, SaaS platforms, and data sources through APIs, queues, and ETL.
Integration patternsMessage queuesWebhooksiPaaS
CAPABILITY 07
User-centered design
Discovery, prototyping, and usability testing so systems fit how people actually work.
UX researchPrototypingUsability testingDesign systems
CAPABILITY 08
Accessibility by design
Section 508 / WCAG built into components and acceptance criteria, not bolted on later.
WCAG 2.xARIAKeyboard accessAutomated a11y checks
CAPABILITY 09
Low-code & platform apps
Workflow and case-management solutions on enterprise platforms where they fit best.
ServiceNowPower PlatformSalesforceWorkflow
CAPABILITY 10
Technical documentation
Architecture decisions, API docs, runbooks, and handover materials.
ADRsAPI docsRunbooksKnowledge transfer
Mission applications
Where it makes a difference.
Representative ways organizations put these capabilities to work.
Public-facing services
Accessible digital services that work on any device.
Internal tools
Replace spreadsheets and email workflows with purpose-built applications.
API enablement
Expose legacy data safely to new applications and partners.
Pipeline modernization
Move from manual releases to automated, auditable deployments.
Secure supply chain
Know exactly what is in your software with SBOMs and scanning.
Incremental modernization
Retire legacy components piece by piece without a risky big-bang.
Our approach
A disciplined path from need to outcome.
- 01
Discover
Understand users, workflows, constraints, and success measures.
- 02
Design
Define architecture, backlog, and acceptance criteria.
- 03
Build in sprints
Deliver working increments with automated tests.
- 04
Secure & verify
Scan, test, and review every change in the pipeline.
- 05
Release & support
Deploy continuously, monitor, and iterate on feedback.
Tools & technologies
Technology we work with.
We are tool-agnostic and start from what you already use. Representative technologies:
Languages
PythonJavaScript / TypeScriptJavaC#SQL
Frameworks
ReactNode.jsDjango / FastAPI.NETSpring
Delivery
GitJenkinsGitHub ActionsDockerTerraform
Quality & security
Selenium / Cypress / PlaywrightSonarQubeOWASP ZAPDependency scanning
Standards & frameworks
Aligned to the guidance that matters.
- NIST Secure Software Development Framework (SSDF, SP 800-218)
- OWASP Top 10 / ASVS
- Section 508 / WCAG 2.x
- 21st Century IDEA digital service principles
- Agile / Scrum delivery practices
Questions
Frequently asked.
Do you work in agile?
Yes — typically Scrum or Kanban with short iterations, visible backlogs, and regular demos.
Who owns the code?
Ownership is defined by contract; our default is that customers own the code, pipelines, and documentation we deliver.
Can you modernize without shutting down the old system?
Yes. Incremental patterns let new components take over gradually while the legacy system keeps running.
How is security handled?
Security checks run automatically in the pipeline, and findings are triaged like any other defect before release.
Related capabilities
Works well with.
✓
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Enterprise Automation & Integration
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Explore capability →These descriptions explain technology domains SIS is positioned to discuss and pursue; they are not claims of completed contracts, existing products, or specialized certifications.
Let's explore the mission requirements.
Connect with SIS to discuss technical needs, collaboration, or teaming opportunities.