Senior Full Stack .NET Developer (Full time or Part time)

The OpportunitySpectrum One is a strategic engineering partner for high-growth startups and established corporations. Since 2015, we have helped our clients raise over$150M in funding.We are a profitable business with consistent double-digit year-over-year growth.

We are scaling our engineering team and looking for multiple developers.We prioritize capability over tenure.We are looking for engineers who can architect and ship production-ready software with high autonomy. We value the quality of your output above the length of your resume.

Who We Are Looking For

• You are a Professional.You take ownership of your work. You don't need to be micro-managed to deliver.
• You Value Craftsmanship.You write clean, maintainable, and efficient code. You care about the long-term health of the codebase, not just closing tickets.
• You Have High Agency.You identify problems and fix them before they are assigned. You are comfortable navigating ambiguity.

Why Engineers Choose Us

• High-Trust Environment:We hire adults. We don't track keystrokes or enforce arbitrary hours. We care about the quality of your output.
• Deep Work:We minimize meetings to protect your focus time. We operate asynchronously by default.
• International Standards:You will work with top-tier international clients, building systems that scale and handle real-world traffic.

Why Join Spectrum One

• Real Strategic Influence:We expect engineers to drive technical decisions. You will have a direct hand in shaping the architecture and product roadmap.
• Autonomy by Default:We reject the traditional agency model of churn and burn. We provide the context and the goal, then we trust you to execute.
• A Culture of Excellence:You will be surrounded by high-performers who push you to be better. We believe in continuous evolution and provide the environment you need to do the best work of your career.
• Top-of-Market Compensation:High base salary benchmarked against industry standards, plus annual performance-based bonuses.
• Annual Summit:A fully-funded, company-wideOut of Countryretreat to celebrate our wins.
• Hardware & Gear:We provide the latest tech (MacBook Pro or equivalent) and other equipment to ensure your workspace is ergonomic and productive.
• Professional Development Budget:We provide an annual budget for courses, certifications, books, and conferences. We want you to stay sharp.
• Permanent Remote:Work from home or anywhere you are most productive.
• Time Off & Wellness:Generous paid leave policy, full medical coverage (HMO), and mental health support for you and your dependents.
  

We are looking for a seasoned Senior .NET Developer to join our core engineering team. In this role, you will serve as a technical anchor, bridging the gap between our established enterprise systems and our next-generation applications.

You are the ideal candidate if you are just as comfortable debugging a complexMVC 5application as you are architecting microservices in.NET 8. You understand that modernization isn't just a buzzwordit's a careful process of refactoring, migrating, and improving existing codebases without disrupting business operations.

• Develop & Maintain:Support and enhance existing legacy applications built on.NET Framework 4.8 (MVC)while ensuring stability and performance.
• Modernize & Migrate:Lead initiatives to port modules and functionalities from legacy frameworks to.NET 8+, utilizingEF Core.
• Database Optimization:Write, analyze, and optimize complexT-SQLscripts, stored procedures, and triggers. You will be responsible for tuning performance in high-transaction environments.
• Full-Stack Implementation:Build responsive and user-friendly interfaces usingBootstrap 5, utilizingjQueryfor DOM manipulation in legacy views and modern vanilla JS/Blazor for new components.
• Architecture & Mentorship:Guide junior developers on best practices for both ORMs (EF6andEF Core) and conduct code reviews to ensure clean, maintainable architecture.
  

• Backend Core:
• Deep expertise inC#and.NET Framework 4.8(ASP.NET MVC).
• Strong proficiency in.NET 8+(Core) for new API and service development.
• Data Access (ORM):
• Extensive experience withEntity Framework 6(edmx, database-first, or code-first workflows).
• Proven experience implementingEF Core 8+in a modern dependency-injection environment.
• Database:
• AdvancedT-SQL scriptingskills (stored procedures, views, indexing, execution plans) on Microsoft SQL Server.
• Frontend:
• Solid grasp ofjQueryfor maintaining and extending existing client-side logic.
• Proficiency inBootstrap 5for building responsive, mobile-first layouts.
  

• Experience with Azure or AWS cloud services (App Services, SQL Azure).
• Knowledge of modern JavaScript frameworks (Vue.js, React, or Angular) to assist in future frontend migrations.
• Experience with CI/CD pipelines (Azure DevOps, GitHub Actions).
• Understanding of Dependency Injection (DI) patterns in both legacy and modern .NET.
  

• Pragmatism:The ability to choose the right tool for the job (knowing when to refactor vs. when to rewrite).
• Communication:Ability to explain technical debt and modernization strategies to non-technical stakeholders.
  

• For full-time: flexible hours, just need to be online or attend calls from 10pm to 2am PH time. For part time: 10pm to 2am or 5am onwards PH time.

Visit our website atspectrumone.co.