Principal Software Engineer (Integrations)

Nerdery, LLC.; United States; Hybrid; USD 165,000 - 200,000; Full time

Benefits offered by this job

Remote-friendly

Health & Wellness plans

401(k) with company match

Flexible PTO

Professional development

Job summary

Nerdery, LLC. seeks a Principal Software Engineer (Integrations) to own architecture of a multi-tenant ERP connector framework for Fleetio, coordinating SAP S4HANA Cloud and Dynamics 365 BC adapters.

You’ll lead senior engineers and a QA engineer, ensuring data integrity, audit trails, and scalable backend systems. You’ll set engineering standards, drive decisions on cloud layout and SDKs, and hand the framework to Fleetio’s team at project end.

Qualifications

• Undergraduate or graduate degree in a computer related field or equivalent
• 8+ years of software development experience
• 2-3+ years of application software architecture experience
• Ability to write complex software and explain rationale
• Strong technical communication for technical and non-technical audiences
• Knowledge of iterative development processes
• Experience in production system-to-system integrations
• Deep data-integrity design (idempotency, outbox/ledger patterns)
• Multi-tenant SaaS design with tenant isolation and per-tenant secrets
• AWS and IaC design responsibility not just usage
• Fluent in Python and/or TypeScript/Node; comfortable with Ruby/Rails
• Experience leading client-facing technical engagements with hard deadlines
• Experience designing scalable, reliable backend systems and integrations
• Hands-on experience using AI-assisted development tools in daily workflows

Responsibilities

• Own and evolve the framework design, adapter interfaces, idempotency ledger, and posting matrix
• Lead early decision spikes and document decisions (cloud layout, SDK choices, gaps)
• Gate data models with Fleetio; define interim models if needed
• Translate accounting requirements into design and review posting defaults
• Build core framework code with team for ledger and posting integrity
• Coordinate work across SAP and Dynamics lanes with scope discipline
• Set engineering standards and review code and tests with QA
• Lead the technical demo for Fleetio kickoff and knowledge transfer
• Define how AI tools are used with the team's workflow
• Provide technical sales input and estimates as needed
• Assist with other duties as assigned

Skills

Software architecture

Backend engineering

Python

TypeScript/Node

AWS/IaC

Data integrity

Multi-tenant SaaS

Technical communication

AI/LLM tooling

Client-facing engagements

Education

University degree in computer science or related field

Coding bootcamp or demonstrated self-taught skills

Tools

SAP S4HANA APIs

Dynamics 365 Business Central

Paragon

Workato

Terraform/Pulumi

Job description

About Nerdery and Being a "Nerd." Nerdery is a digital product consultancy. Much more than consultants, we’re allies and guides on our clients’ digital journey – helping them to grow their business and delight their customers through intuitive, thoughtfully designed technology. As true partners, we prepare our clients for the opportunities in front of them, help them achieve their goals, and quickly deliver value for their customers. We do this by solving problems in creative ways across strategy, design, and technology. At Nerdery, we’re not defined by our job titles but by the impact we make. You’ll work directly and closely with some of the world’s best brands to help create innovative digital products that serve everyone. As Nerds, our insight, innovation, and expertise are celebrated, and our growth is not only encouraged but expected. Being a Nerd means stepping up and pushing the boundaries of what’s possible.

We are looking for a PRINCIPAL SOFTWARE ENGINEER (Integrations) to join our team! We invite you to check out the details below and consider whether becoming a Nerd is the next step in your career journey.

The Principal Software Engineer is the technical lead and a full-time hands-on builder for a multi-tenant ERP connector framework for Fleetio, a fleet maintenance SaaS platform. The first adapters are SAP S4HANA Cloud and Microsoft Dynamics 365 Business Central. The Principal owns the architecture and its early decisions (platform, stack, cloud setup), leads three senior engineers and a QA engineer, and is accountable for posting integrity: financial data moves between Fleetio and customer ERPs with no duplicates and a complete audit trail. They are the main technical voice to Fleetio’s product, integrations and infrastructure teams, and hand the framework over to Fleetio’s integrations team at the end of the engagement.

Requirements

• Undergraduate or graduate degree in a computer related field, coding bootcamp certificate, OR a thorough demonstration of self-taught software development skills
• 8+ years of software development experience
• 2-3+ years of application software architecture experience, including familiarity with common design patterns and approaches for solving typical application problems for their discipline
• Ability to write complex software and demonstrated proficiency in explaining the “why” behind code
• Strong technical communication acumen; can explain complex technical problems to technical and non-technical audiences (clients, project members, team members, peers, etc.)
• Strong understanding of the development process and ability to maintain an iterative approach throughout the project lifecycle
• Architected and shipped production system-to-system integrations or an integration platform. A web-app architect isn’t enough.
• Deep data-integrity design: idempotency, outbox/ledger patterns, at-least-once delivery, reconciliation.
• Multi-tenant SaaS design: tenant isolation (row-level security), per-tenant secrets, kill switches.
• AWS and IaC design responsibility, not just usage.
• Fluent in Python and/or TypeScript/Node, and comfortable reading Ruby/Rails.
• Has led a client-facing technical engagement under a hard date.
• Demonstrated experience designing and architecting scalable, reliable, and maintainable backend systems and system-to-system integrations, with a strong understanding of distributed systems, architectural trade-offs, and production-level design decisions.
• Demonstrated hands-on experience integrating AI-assisted development tools into daily software engineering workflows, including code generation, debugging, testing, refactoring, and technical problem-solving.
• Ability to effectively leverage AI development tools through structured context management, clear technical specifications, prompt engineering, and iterative validation of AI-generated solutions.

Preferred

• Has experience or demonstrates the ability to participate in client pitches
• Exposure to full stack applications and coding skills outside of your specialization
• SAP S4HANA APIs (OData/SOAP, communication arrangements, SAP Cloud SDK) and/or Dynamics 365 Business Central
• ERP accounting flows (journal entries, PO -> goods receipt -> supplier invoice, three-way match)
• iPaaS platforms (Paragon, Workato)
• Framework or SDK design meant for reuse by another team
• Experience designing, building, or integrating AI-powered applications, autonomous agents, or agentic workflows using LLM APIs, AI orchestration frameworks, or related technologies.

What You’ll Do

• Own and evolve the existing design: framework module boundaries, adapter interface, idempotency ledger, posting matrix, Postgres-as-queue with the managed-queue upgrade path, and tenant configuration.
• Run the early decision spikes and write the decision records: Paragon vs. standalone, language and SDK choices, AWS environment layout, Fleetio API gaps, and SAP journal-entry timeout recovery.
• Gate the canonical data models with Fleetio. If Fleetio’s models arrive late, define interim models and get sign-off on them.
• Translate accounting requirements into design. Run the finance review of posting defaults (journal-entry mode, company code, tax, currency, posting dates) with Fleetio’s SAP-literate accounting lead.
• Build core framework code alongside the team, especially the ledger and posting-integrity paths.
• Sequence work across the SAP and Dynamics lanes. Keep the “SAP ready by end of January” scope honest using the agreed cut order, and raise early when scope and capacity diverge.
• Set the engineering standards, aligned with Fleetio’s quality guidelines and IaC standard (Terraform/Pulumi). Review code and set test strategy with QA, including duplicate-posting and fault-injection tests.
• Lead the technical side of the demo for Fleetio’s Feb 1-4 kickoff, and the knowledge transfer and runbooks for Fleetio’s integrations team.
• Set how the team uses AI-assisted development within the SOW’s AI clause. The plan assumes those efficiency gains.
• Provide ad-hoc technical support to other practitioners in the domain as needed
• Assist with sales requests as needed by providing technical recommendations and estimates to prospective clients
• Participate in other duties as assigned

Pay Range

• $164,500-$200,000/per year

Benefits & Perks

• Health & Wellness: Choose from two comprehensive medical plans (including an HSA-eligible option), plus high-quality dental and vision insurance.
• Financial Security (Company-Paid): We provide peace of mind by fully covering the cost of several essential plans: Basic Life and AD&D Insurance, Short-Term Disability (STD), and Long-Term Disability (LTD) coverage.
• Comprehensive Support: Take advantage of discounted, employee-paid options to protect your family, pets, and assets, including Voluntary Life and AD&D, Accident, Critical Illness, and Hospital Indemnity insurance, Pet Insurance, and plans offering Legal Support and Identity Theft Protection.
• Retirement: We offer a 401(k) plan with a company match of up to 3.5% with immediate vesting.
• Time Off: Nerds enjoy flexible time off with Flex PTO that can be used for vacation, personal time, personal illness, or time off to care for dependents.
• Remote Work: Nerdery is a remote-friendly workplace. Our Minnesota office space is available for Nerds who prefer an in-office environment or collaborative setting.
• Professional Growth: All Nerds have dedicated resources and access to funds to pursue professional development, attend industry conferences, and obtain certifications.

What Skills Will Help You Be A Successful Nerd?

• Customer-Focused Execution and Communication: Excels at translating deep customer understanding into impactful work, ensuring that every project and decision delivers exceptional user value. Able to effectively explain technical decisions to non-technical stakeholders.
• Tenacious Problem-Solving: Relentlessly unravels complex problems, developing innovative solutions to overcome any challenge that stands in the way of progress.
• Integrity-Driven Work: Builds trust by consistently upholding high standards in all work and advocating for the right approach, ensuring quality and transparency.
• Collaborative Impact: Actively elevates the team's capabilities by fostering a collaborative environment, sharing knowledge, and prioritizing collective success over individual credit.
• End-to-End Ownership: Takes full accountability for an initiative's entire lifecycle, from concept to completion, ensuring the final result successfully achieves its intended goals.
• Dedication to Craftsmanship: Driven by a passion for their craft to continuously learn, deepen their expertise, and strive for excellence in their chosen field.

Physical Demands and Work Environment

• Sitting for extended periods: will spend significant time in meetings, presentations, and computer use.
• Occasional standing and walking: will need to move around during presentations and client interactions.
• Computer Use: Extensive use of a keyboard, mouse, and computer screen for extended periods. Ability to adjust focus between screen and documents.
• Public Speaking: requires public speaking, including presenting to clients.
• Reaching: Reaching for items on a desk, retrieving documents, or working with equipment is required.
• Lifting: Occasional lifting of light objects (e.g., laptops, peripherals) may be necessary.
• Office Environment: The work environment is primarily an office setting, with typical office equipment and noise levels.
• On-site client work: some work might involve on-site client visits and demonstrations, possibly requiring some walking and standing for extended periods.

Disclaimer

Must be legally authorized to work within the country of employment without sponsorship for employment visa status.

Nerdery is an equal opportunity employer and complies with all applicable federal, state and local fair employment practice laws. Nerdery strictly prohibits and does not tolerate discrimination against employees, applicants or any other covered persons because of race, color, religion, creed, national origin or ancestry, ethnicity, sex, sexual orientation, gender (including gender nonconformity and status as a transgender or transsexual individual), pregnancy, marital status, familial status, age, physical or mental disability, citizenship, past, current or prospective service in the uniformed services, genetic information, membership or activity in a local human rights commission, status with regard to public assistance or any other characteristic protected under applicable federal, state or local law. All employees, other workers and representatives of Nerdery are prohibited from engaging in unlawful discrimination. Nerdery will ensure that all employment practices are free of such discrimination. Such employment practices include, but are not limited to: hiring, promotion, demotion, transfer, recruitment or recruitment advertising, selection, layoff, disciplinary action, termination, compensation, benefits, selection for training, including apprenticeship and other terms and conditions of employment. Nerdery will also provide reasonable accommodation to applicants and employees with disabilities pursuant to all applicable laws.