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.NET Core Migration & Development Services

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  • MODERNIZE YOUR PLATFORM

    Rebuild your execution layer for speed, clarity, and control. Migrate from .NET Framework to .NET Core to unlock structured delivery, composable architecture, and readiness for scale.

  • UNLEASH MICROSERVICES

    Transition to modular, independently deployable services. Align system design with team structure, scale only where needed, and build features without coordinating across the entire codebase.

  • GO CLOUD NATIVE

    Run containerized .NET Core services in orchestrated environments with full observability. Adapt to load, deploy with confidence, and surface real-time signals that drive product and platform decisions.

Why It Matters

Transform your rigid .NET Framework monolith into a nimble cloud-native .NET Core Platform.

Moving a complex system from .NET framework to .NET Core shouldn’t feel like an all-or-nothing overnight cutover — it can be planned with the same precision as your release train.

Currently, your codebase is a tangle of hidden dependencies and outdated libraries. Every change risks a cascade of regressions that delay work on new features. We break these risks down into a clear, actionable plan with manageable milestones that keep customers online and the business running smoothly.

Review our architecture assessment and phased migration services, and you will see why our clients consider us a long-term technical partner, rather than just another vendor. In return, you get a hardened, containerized .NET Core stack that’s ready for the cloud, CI/CD, and the product roadmap you want to build.

What We Offer

Services We Provide

  • Architecture & Migration Assessment

    Establish architectural ground truth before committing to transformation.

    We analyze legacy .NET Framework systems to design migration-ready architecture, define clear execution boundaries, and plan phased transition strategies:

    • System Topology Reconstruction. We map runtime architecture, including service segmentation, library usage, shared memory layers, configuration zones, and external system boundaries. We document process flows and surface interactions.
    • Dependency Complexity Profiling. We quantify inter-module coupling, locate unstable or test-fragile classes, and detect transitive dependency chains. Each component is evaluated using a .NET migration tool to assess its volatility, migration cost, and potential for fault propagation.
    • Functional Boundary Isolation. During processes like migrating from ASP .NET MVC to ASP .NET Core MVC, we segment monoliths into coherent execution domains. We identify shared state, global scope contamination, and legacy threading constraints that inhibit isolated deployment.
    • Transition Strategy Definition. We evaluate modular extraction, interface scaffolding, and progressive rewrite approaches. Each option is modeled against delivery capacity, regression scope, and test coverage requirements.
    • Infrastructure & Runtime Alignment. We review OS dependencies, I/O patterns, and deployment models to ensure compatibility with .NET Core and containerized runtimes. We assess CI/CD integration and readiness for Azure-native execution.

    Outcome: a system blueprint aligned with execution and engineered for phased, verifiable .NET Core migrate processes.

  • .NET Framework to Core Migration Execution

    Deliver predictable system evolution with controlled scope, minimal downtime, and traceable behavioral consistency.

    We execute phased migrations from .NET Framework to .NET Core, using code isolation, compatibility scaffolding, and real-time drift detection to ensure operational integrity at each stage.

    Our focus is system survivability, not code movement, preserving function under changing architecture:

    • Module Extraction and Refactoring. We isolate stable modules from legacy systems and refactor them into Core-compatible components. We deprecate stateful logic, replace outdated patterns (e.g., AppDomain usage and synchronous handlers), and remove WinForms and WCF dependencies where applicable.
    • Interface Scaffolding. We build adapters, wrappers, and façade layers to maintain contract-level consistency during transition. Interfaces are aligned with ASP.NET Core patterns, and legacy consumers are connected through temporary proxies until cutover is completed.
    • State Preservation. We analyze persistence models and migrate state representations, schema structures, and session handling logic to support Core runtime behavior. Data model evolution is tracked with versioning and rollback safety.
    • Runtime Execution Stabilization. We deploy under controlled environments, using containerized Core runtimes (e.g., Docker + Kestrel/Nginx). Runtime differences — thread scheduling, garbage collection, event loops — are observed using synthetic traffic and load patterns to detect regressions early.
    • Cross-Version Behavior Consistency. We integrate behavior snapshots and golden path tests from legacy systems to validate equivalence. Functional drift and non-deterministic behavior are flagged, traced, and resolved during migration stages, maintaining behavioral symmetry throughout API development in ASP .NET Core.

    Outcome: a stable .NET Core system delivered through controlled module extraction, consistent interfaces, and comprehensive behavior validation across environments.

  • Microservices Architecture Enablement

    Transform monolithic systems into modular, independently deployable services with traceable boundaries and platform-aligned execution models. This work focuses on service decomposition, encapsulation, and orchestrated execution under real-world load and delivery conditions.

    The engagement includes five core services:

    • Domain Segmentation and Service Definition. We extract business domains and operational flows to define viable service boundaries.
    • Service Containerization and Runtime Isolation. We containerize decomposed services using Docker and align execution with Kubernetes or Azure Service Fabric. Runtime behavior is validated against system-level constraints: thread pools, resource quotas, I/O throughput, and latency budgets.
    • Inter-Service Communication Modeling. We define contracts and messaging strategies — REST, gRPC, or async queues — based on SLA tolerance, failure isolation, and message fan-out. Communication flows are hardened against retries, partial failures, and schema drift.
    • Observability and Failure Containment. We integrate telemetry for health checks, distributed tracing, and anomaly detection. Service boundaries are hardened with circuit breakers, bulkheads, and policy-based retries to ensure local failures remain local.
    • CI/CD Orchestration and Lifecycle Control. We connect service development to deployment pipelines with versioned containers, tagged releases, and environment-aware rollout strategies. Rollback and hotfix pathways are modeled for each service independently.

    Outcome: a modular .NET Core service mesh with domain-aligned boundaries, autonomous deployments, and full operational observability.

  • Cloud-Native Deployment Enablement

    Align application infrastructure with a modern runtime environment to support scale, resilience, and delivery automation.

    We prepare .NET Core systems for cloud-native deployment, optimizing container behavior, service composition, and operational governance under public, private, or hybrid cloud models.

    This work focuses on enabling infrastructure elasticity and reducing operational overhead, and enforcing predictable behavior across changing runtime contexts.

    The engagement includes five core services:

    • Runtime Environment Validation. We test application behavior under cloud constraints, including statelessness, horizontal scaling, volatile IP addresses, and ephemeral storage, and adapt our threading, caching, and session models accordingly.
    • Container Build Optimization. We construct lean container images for .NET Core services using multistage builds, slim base layers, and minimal startup profiles. Images are optimized for security, scanned, and versioned for promotion control.
    • Service Mesh Integration. We configure Kubernetes or Azure-native orchestration with health probes, liveness policies, and autoscaling thresholds. We enable routing, service discovery, and policy-based access with Istio or Linkerd.
    • Environment-Aware Configuration. We separate runtime configuration from the codebase. Environment variables, secrets, and external service bindings are injected at deploy time via Helm charts, Terraform modules, or Azure pipelines.
    • Observability and SLO Enforcement. We deploy telemetry and alerting to track latency, saturation, error rates, and resource consumption. Dashboards and SLOs are defined per service class, with integrated rollback triggers and on-call workflows.

    Outcome: a cloud-ready .NET Core execution model with automated deployment, runtime traceability, and infrastructure elasticity under control.

  • Post-Migration Optimization & Support

    Establish system reliability, performance equilibrium, and maintainability patterns after the migration process completes.

    We provide post-migration services for .NET Core systems where architectural shifts, runtime model changes, and tooling transitions often expose unmodeled fragility. Our focus is not incident reaction, but systemic hardening.

    The engagement includes five core services:

    • Runtime Stability & Resource Profiling. We analyze execution under live conditions, including memory pressure under updated GC models, thread pool saturation, I/O latency, and async queue backlogs. We attribute anomalies to misaligned system design, rather than transient noise.
    • Codebase Correction & Artifact Removal. We clean up post-migration artifacts such as leftover .NET Framework shims, temporary adapters, and placeholder interfaces. The code is stabilized into a Core-Native execution form — deterministic, container-safe, and observable.
    • Service Behavior Normalization. We validate distributed execution across services: message queues, retries, consistency gaps, orphaned tasks, and race conditions. Service boundaries are reverified against runtime contract fidelity and operational drift.
    • CI/CD Post-Merge Governance. We reconfigure pipelines for low-risk deployment: release gating, traffic splitting, dark launching, and time-based rollback. Drift logs and state mutation monitors are integrated into observability pipelines.
    • Operational Playbooks. We establish operational runbooks tied to failure models observed post-migration, including cold start spikes, configuration mismatches, degraded message flow, and timeouts under partial dependency availability.

    Outcome: a post-migration .NET Core system with confirmed runtime integrity, stabilized services, and self-recovering failure patterns documented and enforced.

  • Custom .NET Core Development

    Build execution-centric systems with measurable performance, clean interfaces, and minimal operational ambiguity.

    As part of our .NET Core development services, we build applications where runtime behavior, system topology, and delivery constraints shape implementation decisions. Every service, interface, and pipeline is designed for traceability under load and auditability across environments.

    This work focuses on implementation that scales, communicates, and survives—not just compiles.

    The engagement includes five core services:

    • Service Design and Execution Modeling. We define service responsibilities, isolation boundaries, and concurrency models based on workload profiles, domain constraints, and deployment topology. Designs are traceable to NFRs and observable under synthetic and real traffic.
    • Interface Contracts and Compatibility Discipline. We design stable interfaces across REST, gRPC, and message brokers with explicit versioning, backward-compatibility layers, and schema governance. API surface is minimized, and dependency contracts are enforced across boundaries.
    • Asynchronous Processing and Background Execution. We implement durable task queues, message-based workflows, and time-bound job orchestration to ensure seamless and efficient operation. Failure cases — retries, poison queues, handler timeouts — are tracked and instrumented.
    • Observability-First Implementation. We embed metrics, traces, and structured logs during development, not post-factum. Dashboards and alerts reflect the execution of functions, SLA compliance, and edge failure symptoms across pre-production and production environments.
    • Environment-Aligned Delivery Patterns. We align our deliverables with target deployment options: containerized microservices, Azure Functions, or on-premises hosted APIs. Code is tested against operational behaviors, including those encountered in ASP .NET Core API from scratch to master Azure deployment.

    Outcome: a production-grade .NET Core system designed for high-clarity execution, predictable behavior, and maintainable complexity across the whole application lifecycle.

Our Process

Our Approach

We collaborate with engineering and product leaders to analyze system architecture, evaluate migration readiness, and guide the transition toward a modern, scalable .NET Core infrastructure, aligned with business and technical constraints.

01.

01. Define Migration Objectives

We align with your team on strategic outcomes: performance targets, scalability needs, deployment constraints, and delivery timelines. These guide every architectural and implementation decision.

02.

02. Assess Technical Landscape

We analyze your existing .NET Framework system — codebase complexity, service dependencies, third-party integrations, and runtime characteristics — to surface technical risks and migration blockers.

03.

03. Prioritize and Sequence Transition

We break down the system into logical domains and define phased migration steps. Modules are prioritized by business criticality, volatility, and infrastructure alignment.

04.

04. Ensure Runtime Stability

We implement execution safeguards, including interface scaffolding, test generation, and observability hooks, to ensure behavioral continuity during and after the transition.

05.

05. Deliver Cloud-Ready Architecture

We finalize the transition with a containerized, service-oriented architecture optimized for modern CI/CD, observability, and extensibility to .NET Core mobile development scenarios.

  • 01. Define Migration Objectives

  • 02. Assess Technical Landscape

  • 03. Prioritize and Sequence Transition

  • 04. Ensure Runtime Stability

  • 05. Deliver Cloud-Ready Architecture

Value We Provide

Benefits

01

Enterprise-Grade Delivery Backed by Proven Standards

Devox Software delivers system modernization with the discipline of ISO 27001:2013 and ISO 9001:2015 frameworks. Our .NET Core migration approach integrates principles of quality management, information security, and GDPR-aligned architecture, ensuring long-term compliance across highly regulated industries. This foundation supports predictable, governed transformation at scale.

02

Migration Strategies Engineered for Complex Environments

Our teams specialize in the migration to .NET of deeply embedded .NET Framework systems with high coupling, legacy dependencies, and limited observability. Devox Software applies structured analysis, service isolation, and execution-aware planning to deliver transformations that preserve continuity, stabilize runtime behavior, and enable phased modernization, even under parallel development and constrained delivery schedules.

03

Proven Trust from Global Product and Platform Teams

Devox Software is a trusted partner for ISVs, platform teams, and mid-market enterprises in the FinTech, Logistics, Healthcare, and SaaS sectors. With over 30 successful .NET projects delivered and more than 50 engineers focused on backend modernization, we provide execution capabilities that align with real-world engineering workflows — from assessment to deployment, from runtime stabilization to post-launch optimization.

Case Studies

Our Latest Works

View All Case Studies
Real Estate Listing Project Real Estate Listing Project
  • Backend
  • Frontend & Mobile
  • DevOps & Infrastructure
  • Third-Party Integrations

Immersive Property Portal with 360° View for Real Estate Buyers and Brokers

A real estate portal designed to streamline property search, simplify renting and buying decisions with personalized housing recommendations.

Additional Info

Core Tech:
  • NET Core
  • MS SQL
  • ELK
  • Angular
  • React Native
  • NgRx
  • RxJS
  • Docker
  • GitLab CI/CD
Country:

UAE UAE

PortalPRO PortalPRO

PortalPRO: Real Estate Maintenance Platform Modernization

A performance-optimized real estate platform built with seamless frontend/backend integration and proactive error handling.

Additional Info

Core Tech:
  • NET Core / .NET 7
  • C#
  • ASP.NET Core
  • SQL
  • Docker
  • React
Country:

Lithuania Lithuania

Function4 Function4
  • website
  • management platform

Function4: Event Management Platform for the Financial Services Industry

A feature-rich system for managing tickets, devices, invites, and communication at scale.

Additional Info

Core Tech:
  • Vue js
  • GSAP
  • Ruby
  • Azure
Country:

USA USA

Testimonials

Testimonials

Sweden

The solutions they’re providing is helping our business run more smoothly. We’ve been able to make quick developments with them, meeting our product vision within the timeline we set up. Listen to them because they can give strong advice about how to build good products.

Carl-Fredrik Linné
Tech Lead at CURE Media
Darrin Lipscomb
United States

We are a software startup and using Devox allowed us to get an MVP to market faster and less cost than trying to build and fund an R&D team initially. Communication was excellent with Devox. This is a top notch firm.

Darrin Lipscomb
CEO, Founder at Ferretly
Daniel Bertuccio
Australia

Their level of understanding, detail, and work ethic was great. We had 2 designers, 2 developers, PM and QA specialist. I am extremely satisfied with the end deliverables. Devox Software was always on time during the process.

Daniel Bertuccio
Marketing Manager at Eurolinx
Australia

We get great satisfaction working with them. They help us produce a product we’re happy with as co-founders. The feedback we got from customers was really great, too. Customers get what we do and we feel like we’re really reaching our target market.

Trent Allan
CTO, Co-founder at Active Place
United Kingdom

I’m blown up with the level of professionalism that’s been shown, as well as the welcoming nature and the social aspects. Devox Software is really on the ball technically.

Andy Morrey
Managing Director at Magma Trading
Vadim Ivanenko
Switzerland

Great job! We met the deadlines and brought happiness to our customers. Communication was perfect. Quick response. No problems with anything during the project. Their experienced team and perfect communication offer the best mix of quality and rates.

Vadim Ivanenko
United States

The project continues to be a success. As an early-stage company, we're continuously iterating to find product success. Devox has been quick and effective at iterating alongside us. I'm happy with the team, their responsiveness, and their output.

Jason Leffakis
Founder, CEO at Function4
Sweden

We hired the Devox team for a complicated (unusual interaction) UX/UI assignment. The team managed the project well both for initial time estimates and also weekly follow-ups throughout delivery. Overall, efficient work with a nice professional team.

John Boman
Product Manager at Lexplore
Tomas Pataky
Canada

Their intuition about the product and their willingness to try new approaches and show them to our team as alternatives to our set course were impressive. The Devox team makes it incredibly easy to work with, and their ability to manage our team and set expectations was outstanding.

Tamas Pataky
Head of Product at Stromcore
Stan Sadokov
Estonia

Devox is a team of exepctional talent and responsible executives. All of the talent we outstaffed from the company were experts in their fields and delivered quality work. They also take full ownership to what they deliver to you. If you work with Devox you will get actual results and you can rest assured that the result will procude value.

Stan Sadokov
Product Lead at Multilogin
United Kingdom

The work that the team has done on our project has been nothing short of incredible – it has surpassed all expectations I had and really is something I could only have dreamt of finding. Team is hard working, dedicated, personable and passionate. I have worked with people literally all over the world both in business and as freelancer, and people from Devox Software are 1 in a million.

Mark Lamb
Technical Director at M3 Network Limited
FAQ

Frequently Asked Questions

  • How can you migrate our .NET Framework applications to .NET Core without disrupting daily operations or causing downtime?

    We fully recognize that migration affects real users, real workloads, and active delivery schedules.

    The process starts with an architectural reconstruction — we understand not only the code, but also the dependencies, usage patterns, side effects, and integration areas that determine the actual behavior of your system. Based on this, we design a migration plan that avoids a full cutover and introduces changes incrementally — through module isolation, interface scaffolding, and phased roll-out.

    We preserve execution flow by wrapping legacy endpoints, intelligently routing traffic, and validating behavior in parallel environments with ASP .NET Core test driven development practices helping ensure consistency and minimize regressions at every stage.

    Each step is designed to be reversible, trackable, and aligned with your team’s delivery pace.

  • What are the main advantages of migrating from the .NET Framework to .NET Core?

    Migrating to .NET Core aligns your system with modern runtime models and best infrastructure practices.

    The platform supports containerized execution, cross-platform builds, and memory-efficient threading, making .NET Core for web development a reliable foundation for building scalable and portable systems. These improvements lead to better deployment control, consistent performance, and easier environment portability. Engineering teams gain access to a mature toolchain built around observability, automated testing, and delivery pipelines designed for scale.

    This transition creates conditions for long-term platform evolution: measured releases, operational predictability, and structural readiness for new features, services, and markets.

  • Will my existing .NET Framework libraries work with .NET Core?

    Compatibility depends on how your libraries interact with the underlying runtime, platform APIs, and external dependencies.

    Many core libraries with managed code and clean separation from system calls can be retargeted or replaced with .NET Standard or .NET 6+ equivalents. Others — especially those relying on Windows-specific APIs, AppDomains, or legacy UI frameworks — require refactoring or functional substitution.

    At Devox Software, we perform a dependency-level compatibility audit early in the assessment phase.Each library is classified by portability, replacement path, and behavioral risk, enabling confident decision-making in .NET Core API development and cross-version compatibility.

    This helps your team identify which components can be migrated as-is, which require adaptation, and which are better rewritten for long-term operability.

  • How challenging is the migration from .NET Framework to .NET Core?

    Complexity emerges from architecture, coupling patterns, and delivery context.

    We evaluate the migration effort based on your system’s architecture, including service boundaries, dependency graphs, state propagation, test surface, and infrastructure alignment. We model these variables early, tracing execution paths, scoring volatility, and sequencing phases around behavioral invariants.

  • How do I assess if my current .NET application is ready for migration to .NET Core?

    Readiness depends on how the system behaves under real execution — its boundaries, its dependencies, and its place in the delivery lifecycle.

    We start by tracing runtime interactions, observing how logic propagates through modules, how external services are integrated, and how configuration is resolved across environments. We analyze the deployment behavior to identify migration friction points.

    This provides engineering teams with a precise view of transition dynamics: which parts of the system can move smoothly, which require scaffolding, and which define the pace of change.

  • How will your phased roadmap fit around our release calendar, parallel feature work, and limited internal capacity?

    We shape the roadmap around delivery constraints observed at both system and team levels.

    Devox Software starts by mapping architectural dependencies to feature boundaries, release cycles, and operational constraints. Migration phases are aligned with internal delivery rhythms — integrating with your sprints, stabilization windows, and coordination flows across teams.

    Each segment is designed with reversibility, observability, and low contention in mind. Feature work continues in parallel, with defined handoffs and fallback strategies at integration points. Internal capacity guides phase granularity, not just velocity, so engineering focus remains sustainable across all streams.

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