Principal Software Engineer - Next Generation Platform

LTI TECHNOLOGY SOLUTIONS INC; Omaha (NE); On-site; USD 140,000 - 200,000; Full time

Job summary

LTi Technology Solutions seeks a Staff Software Engineer to lead the next-generation Aspire platform rebuild on .NET and React, deployed to Azure. You’ll define architecture, scaffolding, and scalable patterns, influencing both backend and frontend across a small senior team.

Expect ownership of design authority and production-quality code across the stack. You will mentor engineers, shape DevSecOps practices, and own migration tooling for moving customers to the new platform, guiding a

Qualifications

• Bachelor's degree in Computer Science or related field, or equivalent professional experience.
• Expert-level C# and modern .NET development experience in a production setting.
• Strong React/TypeScript frontend and ASP.NET Core backend capabilities.
• Experience with OpenAPI, API versioning, and multi-tenant SaaS design.
• Proficiency with Azure services, CI/CD, IaC, and secure DevSecOps practices.

Responsibilities

• Define reference architecture for next-generation Aspire platform and tenancy model.
• Build initial scaffolding, templates, DI, logging, and cross-cutting concerns.
• Lead backend services in .NET on Azure with domain-driven design.
• Design contract-first APIs with OpenAPI and robust versioning policies.
• Architect secure multi-tenant SaaS, data isolation, and event-driven workflows.
• Drive migration tooling and greenfield platform delivery from architecture to production.

Skills

C#

.NET

ASP.NET Core

React

TypeScript

OpenAPI

Azure

SQL

DDD

CI/CD

Distributed systems

Education

Bachelor's degree in Computer Science or related field

Tools

Azure DevOps

Terraform

Bicep

Docker

GitHub Actions

SQL Server / Azure SQL

Job description

About LTi Technology SolutionsLTi Technology Solutions is a leading provider of asset finance and leasing software, purpose-built for the financial services industry. Our flagship platform, Aspire, powers the full asset finance lifecycle, from origination and credit decisioning through portfolio management, billing, accounting, and end-of-term; for banks, captives, independent finance companies, and specialty lenders across North America and internationally.Backed by private equity and in active growth mode, LTi is expanding its product footprint, entering new geographic markets, and making the most significant platform investment in the company’s history: a ground-up re-platform of Aspire onto a modern .NET and React architecture running on Microsoft Azure. Our customers manage billions of dollars in lease and loan portfolios on Aspire, and the next generation of the product will carry that mission-critical workload forward on a foundation built for scale, extensibility, and speed of delivery.This is a rare opportunity to join a profitable, established software company at an inflection point, where foundational engineering investment will directly shape product strategy, customer outcomes, and competitive differentiation. You will work alongside a focused, experienced team and have the autonomy to build things that matter.Position SummaryLTi is hiring a Staff Software Engineer to serve as the founding technical leader for the next-generation Aspire platform. This is a true greenfield effort: a full re-platform of Aspire onto a more modern .NET stack with a React and TypeScript front end, deployed on Azure. The solution architecture, the module boundaries, the tenancy model, the build and deploy pipeline, the testing strategy, the component library, the local developer inner loop, all must be figured out and built. That is the first task for this role.Reporting to the VP of Engineering, the Staff Software Engineer will operate as the technical lead for the next-generation product/platform team. This is an individual contributor role without direct reports; influence comes from design authority, code that sets the standard, and the ability to make other engineers faster. You will help define the patterns, build the scaffolding, write production code across the stack, working with a small senior level team to continue building out the product, including working with a dedicated platform engineer establishing all the DevSecOps things, and a more front-end focused developer.The scope is deliberately broad. Re-platforming a system that carries decades of asset finance domain logic is as much an exercise in deeply learning the domain as it is in engineering a solution. The ideal candidate has done this before, at least once, and knows what to avoidEssential Functions & DutiesPlatform Foundation & ScaffoldingHelp define the reference architecture for the next-generation Aspire platform, including service topology, module and bounded-context boundaries, tenancy model, and the interaction patterns between front end, API, and domain layersBuild the initial scaffolding the rest of the organization will build on, including solution structure, project templates, dependency injection and configuration conventions, cross-cutting concerns (authentication, authorization, tenant context, logging, error handling, background processing, database migrations), and reusable librariesPartner to establish the local developer experience and inner loop: containerized dependencies, seed data, one-command environment setup, fast test execution, and clear documentation that lets a new engineer ship a meaningful change within their first weekHelp stand up CI/CD and infrastructure-as-code from zero, including build and deployment pipelines, environment provisioning (Bicep or Terraform), branching and release strategy, PR quality gates, and automated promotion across environmentsAuthor and maintain Architecture Decision Records (ADRs), coding standards, and design guidelines, and establish the lightweight design review process by which they evolveBackend Engineering (.NET on Azure)Design and build backend services in modern .NET (ASP.NET Core), applying domain-driven design to model core asset finance constructs including contracts, assets, lessees, payment schedules, billing, and accounting entriesDesign contract-first, versioned APIs with OpenAPI specifications that are consistent, predictable, and guessable, in alignment with LTi’s Aspire API 2.0 standards, and define the versioning, deprecation, and backward-compatibility policies that go with themBuild event-driven and asynchronous workflow, applying patterns such as transactional outbox, idempotent consumers, retries with backoff, and dead-letter handlingArchitect for secure multi-tenancy end to end, tenant isolation at the data, cache, messaging, and identity layers, with transport-agnostic tenant context that holds up across HTTP, messaging, and background jobsLeverage the Azure platform appropriately (App Service, Container Apps or AKS, Azure SQL, Entra ID, Key Vault, App Configuration, Blob Storage, Redis, Application Insights), making explicit build-versus-buy and managed-service tradeoffsRe-Platform Strategy & MigrationOwn the migration tooling that moves existing Aspire customers, including their data, configuration, and operational workflows, onto the next-generation platform, treating migration as an engineered product rather than a series of one-off services engagementsBuild the pipelines, reconciliation harnesses, and cutover tooling that map legacy Aspire structures onto the new domain model, prove a migrated tenant matches the source system, and support repeatable dry runs with a defined rollback pathPartner with Product, Implementation, and Customer Success on parity analysis, level of effort, and cohort sequencing, and package the tooling so migrations can run without an engineer in the loopTechnical Leadership & MentorshipServe as the technical lead for the next-generation platform team, setting direction, resolving architectural disagreements, and holding the line on qualityRaise the engineering bar through high-signal code review, pairing, design walkthroughs, and by writing the exemplar implementations that establish the pattern for everyone elseMentor mid-level and senior engineers on modern .NET, React, distributed systems design, and the asset finance domain, with the explicit goal of making the team independent of any single personPartner with the VP of Engineering, Engineering Managers, and Product on scoping, estimation, sequencing, and technical risk, translating architectural tradeoffs into business terms for executive and customer audiencesAdvance LTi’s AI-assisted development practices, including spec-driven development workflows and the effective, safe use of AI coding tools in the SDLC, leveraging LTi’s existing Claude-code environment.Evaluate frameworks, libraries, and vendors with rigor, favoring boring, well-supported technology unless there is a clear and defensible reason to do otherwiseFrontend Engineering (React)Work with the team to stablish the front-end architecture in React and TypeScript.Oversee the shared component library and design system foundation in partnership with FE developer and product UX design, ensuring simplicity in building and maintaining the frontend.Govern the build of the data-heavy interaction patterns that define asset finance software for high-volume grids, complex multi-step workflows, configurable forms, and embedded reporting and analytics surfacesHelp define front-end and back-end integration contracts, error semantics, and loading and failure states so that the user experience degrades gracefully under real-world conditionsKnowledge, Skills & AbilitiesBackend & .NETExpert-level proficiency in C# and modern .NET (.NET 8 or later), including ASP.NET Core, minimal APIs or controllers, middleware, dependency injection, and hosted and background servicesDeep experience with relational data modeling against SQL Server or Azure SQL, including performance tuning, indexing strategy, and execution plan analysisStrong command of API design, including REST semantics, resource modeling, OpenAPI, pagination, filtering, error contracts, idempotency, and versioning strategyProficiency with asynchronous and event-driven architecture, message-based integration, and the failure modes distributed systems exhibit in productionWorking knowledge of authentication and authorization patterns including OAuth 2.0, OpenID Connect, JWT, and Microsoft Entra IDArchitecture & DesignProven ability to design greenfield systems from a blank repository to a production-ready foundation, including the judgment to know what to deferDeep understanding of domain-driven design, bounded contexts, and modular monolith versus microservices tradeoffs, with a bias toward the simplest architecture that meets the requirementExperience architecting secure multi-tenant SaaS, including tenant isolation models, per-tenant configuration and extensibility, and noisy-neighbor mitigationExperience with legacy modernization and incremental migration patterns, including strangler-fig approaches, anti-corruption layers, and dual-run verificationAbility to model complex business domains into durable software abstractions, with emphasis on financial services constructsFrontend & ReactWorking knowledge of React and TypeScript, including modern hooks-based patterns, component composition, and performance optimization (memoization, virtualization, code splitting)Knowledge of front-end build tooling (Vite or equivalent), package management, and monorepo or workspace organizationPractical knowledge of server-state libraries (TanStack Query or equivalent), client state management, and form libraries in complex enterprise applicationsHas lived with design systems and shared component libraries to know good from bad.Azure & Platform EngineeringHands-on experience deploying and operating production workloads on Microsoft Azure, including compute (App Service, Container Apps, or AKS), Azure SQL, Service Bus, Key Vault, App Configuration, Storage, and Application InsightsProficiency with containerization (Docker) and, where applicable, Kubernetes fundamentalsExperience with infrastructure-as-code using Bicep, ARM, or Terraform, and with treating environment provisioning as versioned, reviewable codeExperience building CI/CD pipelines in Azure DevOps or GitHub Actions, including automated testing, security scanning, artifact management, and progressive deploymentWorking knowledge of cloud cost awareness and the architectural decisions that drive spend at scaleEducation & ExperienceEducationBachelor’s degree required in Computer Science, Software Engineering, or a related technical discipline; equivalent professional experience will be consideredMaster’s degree in a relevant field is a plus but not requiredRelevant certifications (Microsoft Certified: Azure Solutions Architect Expert, Azure Developer Associate) are valued but not requiredExperienceMinimum 8 years of professional software engineering experience, with increasing scope and technical ownership over timeAt least 4 years building production systems in .NET Core / modern .NET, and at least 3 years building production front ends in ReactDemonstrated experience leading a greenfield platform build from initial architecture through production launchProven track record delivering multi-tenant SaaS in a commercial software environment where uptime, data accuracy, and auditability are mission-criticalExperience with a significant legacy modernization or re-platform effort, including the migration and coexistence strategyExperience serving as a technical lead for a team of engineers, including mentorship, design review, and delivery accountability without direct reporting authorityExperience working in high-growth software environments where velocity and pragmatism are valued alongside engineering rigorLTi Technology Solutions is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.