Senior Software Engineer (.Net)

Vaco by Highspring; Birmingham (AL); On-site; USD 120,000 - 150,000; Full time

Job summary

Vaco by Highspring is seeking a Senior Software Engineer to design, develop, and modernize enterprise applications built on C# and the .NET ecosystem. The role focuses on transforming requirements into scalable solutions, owning major portions of the SDLC, and optimizing SQL Server data layers in Linux-based container environments.

You'll containerize .NET applications using Docker and contribute to orchestration with Kubernetes, while collaborating with business stakeholders and mentoring peers

Qualifications

• Strong experience with C# and the .NET ecosystem.
• Experience with both .NET Framework and modern .NET.
• Strong SQL Server design, queries, and performance tuning.
• Docker containerization and Linux environments.
• Kubernetes or similar orchestration familiarity.
• Git, CI/CD pipelines, and production deployments.
• RESTful API design and integration.
• Understanding distributed systems and integration patterns.

Responsibilities

• Design, develop, and modernize enterprise applications in a .NET environment.
• Own significant portions of the SDLC from requirements to deployment.
• Work with SQL Server data layers and performance optimization.
• Containerize apps with Docker for Linux-based environments and Kubernetes orchestration.
• Collaborate with business stakeholders to translate requirements into technical solutions.
• Mentor junior engineers and document key decisions.

Skills

C# & .NET ecosystem

SQL Server

Docker

Kubernetes

Linux

Git & CI/CD

RESTful APIs

OO design & SOLID

Enterprise systems

Tools

SQL Server tooling

Docker tooling

Job description

Senior Software Engineer - .NET & Enterprise Systems

About the Role

We are seeking a Senior Software Engineer to join an enterprise technology team focused on building, maintaining, and modernizing critical business applications.

This is an opportunity for an engineer who enjoys working within complex, established environments and understands that great software engineering is about more than writing code. You'll be responsible for understanding how systems support the business, translating real-world requirements into thoughtful technical solutions, and improving existing applications without disrupting the operations that depend on them.

The current environment is heavily centered around C#, .NET, and SQL Server, while the team is actively modernizing its technology foundation. You'll have the opportunity to contribute to initiatives involving Linux, Docker, containerization, cloud-native technologies, and more portable data solutions.

The ideal candidate is comfortable operating across the full software development lifecycle and can move between technical implementation, architecture, requirements gathering, and collaboration with business stakeholders.

What You'll Do

• Design, develop, maintain, and modernize enterprise applications using C# and .NET, including .NET Framework and modern .NET
• Take ownership of significant portions of the software development lifecycle, including requirements gathering, technical design, development, testing, deployment, and ongoing support
• Work with SQL Server data layers, including schema design, complex queries, stored procedures, and performance optimization
• Contribute to the modernization and migration of applications toward Linux-based container environments
• Containerize .NET applications using Docker and contribute to orchestration strategies using Kubernetes or comparable technologies
• Collaborate directly with business stakeholders to understand workflows, clarify requirements, and translate business needs into technical solutions
• Challenge requirements and approaches when necessary to identify potential risks, gaps, or opportunities for improvement before development begins
• Build and consume REST APIs and integrate applications with internal and third-party systems
• Apply strong software design principles, coding standards, architectural patterns, and development practices
• Identify technical debt and help develop practical, prioritized plans for addressing it
• Troubleshoot and support applications in production environments
• Mentor less experienced developers and contribute to the overall growth of the engineering team
• Document technical decisions, system behavior, and implementation details to support long-term maintainability

What We're Looking For

Technical Experience

• Strong professional experience with C# and the .NET ecosystem
• Experience working across both .NET Framework and modern .NET
• Strong understanding of object-oriented design, SOLID principles, and common enterprise design patterns
• Strong SQL Server experience, including database design, complex queries, stored procedures, and performance tuning
• Experience with Docker and application containerization
• Familiarity with Kubernetes or similar container orchestration platforms
• Comfortable working in Linux environments, including troubleshooting and application operation
• Experience with Git, CI/CD pipelines, and production deployments
• Experience building and consuming RESTful APIs
• Understanding of distributed systems and application integration patterns

Business & SDLC Experience

• Experience gathering, clarifying, and documenting business requirements
• Ability to understand complex business workflows and accurately translate them into software
• Experience owning or co-owning the end-to-end SDLC, beyond simply writing code
• Strong ability to evaluate requirements and identify when a request needs to be reconsidered or reframed
• Strong written communication skills, particularly around technical documentation and design decisions
• Ability to work effectively with both technical and non-technical stakeholders

Working Style

• Highly autonomous and capable of managing priorities, commitments, and quality without close supervision
• A systems thinker who considers downstream impacts before making changes to shared systems
• Comfortable working within complex, established applications and environments
• Honest and transparent about technical risk, scope, and delivery timelines
• Comfortable navigating ambiguity and bringing structure to unclear requirements
• Collaborative and willing to mentor and support other engineers
• Takes ownership of problems from discovery through resolution

Nice to Have

• Experience migrating .NET applications from Windows environments to Linux-based containers
• Experience with alternative relational databases such as PostgreSQL or MySQL
• Exposure to cloud-native application architecture and open-source technologies
• Experience with workflow or BPM platforms
• Experience designing workflow or state-machine logic
• Experience working in regulated or compliance-driven environments
• Familiarity with message queues, event-driven architecture, or asynchronous integration patterns
• Experience working across Microsoft and non-Microsoft technology ecosystems

Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual's skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs. With that said, as required by local law in geographies that require salary range disclosure, Vaco/Highspring notes the salary range for the role is noted in this job posting. The individual may also be eligible for discretionary bonuses, and can participate in medical, dental, and vision benefits as well as the company's 401(k) retirement plan. Additional disclaimer: Unless otherwise noted in the job description, the position Vaco/Highspring is filing for is occupied. Please note, however, that Vaco/Highspring is regularly asked to provide talent to other organizations. By submitting to this position, you are agreeing to be included in our talent pool for future hiring for similarly qualified positions. Submissions to this position are subject to the use of AI to perform preliminary candidate screenings, focused on ensuring minimum job requirements noted in the position are satisfied. Further assessment of candidates beyond this initial phase within Vaco/Highspring will be otherwise assessed by recruiters and hiring managers. Vaco/Highspring does not have knowledge of the tools used by its clients in making final hiring decisions and cannot opine on their use of AI products.

Equal Opportunity Notice

Highspring LLC (d/b/a Vaco by Highspring) and its parents, affiliates, and subsidiaries ("we," "our," or "Vaco by Highspring") are committed to the full inclusion of all qualified individuals and does not discriminate against any employee or applicant for employment because of race (including but not limited to traits historically associated with race such as hair texture and hair style), color, sex (includes pregnancy or related conditions), religion or creed, national origin, citizenship, age, disability, status as a veteran, union membership, ethnicity, gender, gender identity, gender expression, sexual orientation, marital status, political affiliation, or any other protected characteristics as required by applicable law. The company is also committed to ensuring that persons who need them are provided with reasonable accommodations; if an accommodation is needed to participate in the job application or interview process, please contact [e-mail] .

Vaco by Highspring also wants all applicants to know their rights that workplace discrimination is illegal.

Representation Notice

By submitting to this position, you agree that you will be giving Vaco by Highspring the exclusive right to present your as a candidate for the foregoing employment opportunity. Additionally, you agree to be included in our talent pool for future hiring for similarly qualified positions. You further agree that you have represented information about yourself accurately and have not affirmatively misrepresented your qualifications. Lastly, you agree to maintain as confidential, to the fullest extent permitted by law, any information you learn from Vaco by Highspring about the position and you will limit disclosure of information about the position only to the extent necessary to perform any obligations in furtherance of your application. In exchange, Vaco by Highspring agrees to exercise reasonable efforts to represent you through all solicitation, job screening and resume dispersal.

For residents of Ontario, Canada only: to the extent the position for employment is not with Highspring or not otherwise noted as vacant above, candidate should be informed that this role is to replace a presently employed person at Vaco by Highspring's client.

Privacy Notice

• California residents may access Vaco by Highspring HR Notice at Collection for California Applicants and Employees here.
• Virginia residents may access our state specific policies here.
• Residents of all other states may access our policies here.
• Canadian residents may access our policies in English here and in French here.
• Residents of countries governed by GDPR and UK GDPR may access our policies here.

Additionally, submissions to this position are subject to the use of AI to perform preliminary candidate screenings, focused on ensuring minimum job requirements noted in the position are satisfied. More details about Vaco by Highspring's use of AI can be found here (https://www.highspring.com/ai-use-notices/). Further assessment of candidates beyond this initial phase will be conducted by recruiters and hiring managers. Vaco by Highspring does not know and cannot opine on if its client's use of AI products in hiring.

Pay Transparency Notice

Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to:

• the individual's skill sets, experience and training;
• licensure and certification requirements;
• office location and other geographic considerations; and
• other business and organizational needs.

With that said, as required by local law, Vaco by Highspring believes that the following salary range referenced above reasonably estimates the base compensation for an individual hired into this position in geographies that require salary range disclosure. The individual may also be eligible for discretionary bonuses and/or participation in medical, dental, and vision benefits as well as the company's retirement plan (or similar retirement benefits).