Senior Software Engineer-Architect Track

Ampersand, Inc.

Vernon, WI 53188, USA

Published: 6/14/2022

Technology

Full Time

Job Description

Ampersand is redefining how businesses and public entities manage deposits at scale—combining fintech innovation, treasury intelligence, and secure infrastructure into a unified platform that turns cash into a strategic asset. Our platform empowers B2B clients across both public and private sectors to handle complex financial workflows securely, efficiently, and in real time.

Our technology is the core enabler of our service model—not just supporting operations but defining our market advantage. With our initial platform version launching soon, we’re entering a massive and fast-growing market with a clear opportunity to scale rapidly, capture market share, and expand through API-driven services and potential white-label offerings.

We’re hiring a Senior Software Development Engineer to design, build, and evolve the next generation of our platform and API ecosystem. This role is deeply hands-on—writing code daily, designing scalable systems, and helping shape the foundation for enterprise growth and extensibility.

This role is perfect for emerging Architects as you’ll work alongside our CTO to evolve our back-end architecture and API layer to support rapid growth, extensibility, and enterprise integrations. Your work will directly impact our ability to scale, support new customer types, and unlock future go-to-market models like platform licensing, API integrations, and white-labeled solutions.

ESSENTIAL DUTIES & RESPONSIBILITIES:

The following is a list of essential functions which may be subject to change at any time and without advance notice. Management may assign new duties, reassign existing duties, or eliminate a function.

Platform Architecture & Evolution

Progress the architectural roadmap as we expand from an internal platform to a scalable, productized solution.
Design for multi-tenancy, modular deployments, and white-label capabilities.
Collaborate with the CTO to evolve system architecture to build with future growth in mind: extensibility, observability, and onboarding velocity.
Participate in architecture reviews and contribute to technical standards.

API Design & Strategy

Lead the design and implementation of robust, secure, and reusable RESTful APIs to support integrations with:
- Banking systems
- Retail POS systems
- Cash logistics providers
- Public-sector financial systems
Own API governance, lifecycle management, and documentation for future partner-facing exposure.
Implement and test multi-tenant and modular capabilities in code.

Rules-Based Engine & Financial Logic

Extend the architecture of a configurable calculation engine to handle:
- Reconciliation workflows
- Fee structures
- Exceptions and compliance logic
- SLA enforcement
- Enable non-engineering teams to manage business logic via config, UI, or DSL-based tools.

Scalability, Security & Compliance

Ensure the platform is scalable, highly available, and secure—built to handle regulated financial data with full traceability and audit controls.
Implement data isolation, access control, and logging to support multi-client deployments and public-sector compliance requirements (SOC2, PCI-DSS, etc.).

Technical Leadership & Cross-Team Influence

Act as a thought partner to business leaders as we explore new delivery models.
Provide leadership and mentor engineers on architectural best practices and platform thinking.
Translate customer requirements into scalable architectural patterns.
Support code reviews and help improve platform engineering quality and velocity.

QUALIFICATIONS, EDUCATION & EXPERIENCE:

6+ years of experience in back-end engineering, with 2+ in an architectural or platform leadership role.
Proven experience progressing multi-tenant platforms, complex APIs, or B2B financial systems.
Practical, hands-on experience with C# programming language to develop software applications.
Deep knowledge of:
- Scalable API design (REST API gateways, versioning)
- Modular architecture, microservices, and event-driven systems
- Secure system design: authentication (OAuth2, JWT), encryption, RBAC
- Configurable/rule-based business logic systems
Experience working in a regulated or compliance-driven environment.
Bachelor’s degree in Computer Science, Software Engineering, or a related field (required); Master’s degree or MBA a plus.
Relevant certifications are a strong plus:
- Azure Solutions Architect
- TOGAF or equivalent enterprise architecture framework
- Security certifications (e.g., CISSP, CISM) for compliance-heavy environments
- API and microservices

Helpful if you have:

Background in fintech, cash logistics, treasury, banking, or public-sector financial systems.
Experience launching or scaling a platform from internal use to an external product.
Familiarity with domain-driven design (DDD), event sourcing, or policy-as-code tools.
Past involvement in productizing APIs or white-label software.

SKILLS & COMPETENCIES:

System Design

Deep experience with distributed, scalable, modular systems, including microservices and service orchestration

API Expertise

Expertise in designing, documenting, and securing external and internal APIs (REST) utilizing C#.

Rules Engine Design

Experience with configurable or rule-based engines for dynamic business logic

Security-First Mindset

Strong grounding in secure architecture, compliance standards, and access control

Multi-Tenancy & White labeling

Understanding of tenant isolation, brand customization, and configurable deployments

Cloud-Native Infrastructure

Experience with cloud architecture patterns (preferably Azure)

Strategic Thinking

Ability to balance technical decisions with long-term product strategy and market expansion

Collaboration & Influence

Strong communicator who can work cross-functionally and guide teams on complex architecture decisions

Execution Under Uncertainty

Ability to design with flexibility in mind, anticipating future growth and pivots

Entity Framework/MS SQL Server

Expertise in the use of Entity Framework and MS SQL Server, including data lake design

WORKING CONDITIONS:

Traditional office environment with no unusual work conditions.

§ Prolonged periods sitting at desk and working on computer.

§ Frequent use of keyboard with repetitive motion of hands, wrists, and fingers.

§ Primarily office-based with occasional travel required for business meetings, regulatory engagements, or professional development.

PHYSICAL DEMANDS:

Ampersand, Inc. promotes an equal opportunity workplace, which includes reasonable accommodations of otherwise qualified disabled applicants and employees.

§ Speaking, hearing, and vision are required to perform essential functions.

§ Digital dexterity and hand/eye coordination in operation of office equipment.

§ Light lifting (~25 lbs.) and carrying of supplies, files, etc.

§ Body motor skills sufficient to enable the incumbent to move from one office location to another.

Company DescriptionAmpersand is a tech-enabled financial technology company serving the needs of our treasury/cash management clients and financial institutions around America.

Ampersand is redefining how businesses and public entities manage deposits at scale—combining fintech innovation, treasury intelligence, and secure infrastructure into a unified platform that turns cash into a strategic asset. Our platform empowers B2B clients across both public and private sectors to handle complex financial workflows securely, efficiently, and in real time.

Company Description

Ampersand is a tech-enabled financial technology company serving the needs of our treasury/cash management clients and financial institutions around America.\r\n\r\nAmpersand is redefining how businesses and public entities manage deposits at scale—combining fintech innovation, treasury intelligence, and secure infrastructure into a unified platform that turns cash into a strategic asset. Our platform empowers B2B clients across both public and private sectors to handle complex financial workflows securely, efficiently, and in real time.