Senior Software Engineer [Python]

United States
Product Development – Product Development /
Full-time /
At 3Pillar, culture is more than a buzzword. The power of culture, teamwork, and open collaboration drives our commitment to building breakthrough software solutions that power digital businesses. Our passion for software development has gained us recognition in some of the industry’s most innovative spaces, including a spot on the Inc. 5000 list ten years in a row, a three time winner of the Washington Post Top Workplaces Award, and notable features in Forbes, Fortune, and the Washington Business Journal.

We are an innovative software development partner whose solutions drive rapid revenue, market share, customer growth, and employee efficiency for industry leaders in Media and Publishing, Information Services, Banking and Financial Services, Insurance and Healthcare. Our key differentiator is our Product Mindset. Our development teams focus on building for outcomes and all of our team members around the globe are trained on the Product Mindset’s core values – Minimize Time to Value, Solve For Need, and Excel at Change. Our business-minded approach to agile development ensures that we align to client goals from the earliest conceptual stages through launch and beyond.

At 3Pillar, our core values – Intrinsic Dignity, Outsized Impact, Open Collaboration, and Continuous Improvement – drive our commitment to providing best-in-class software development services to high-growth businesses across the globe. We’ve spent more than fifteen years building innovative software solutions. Our executive team has always held our values to the highest standard which has led to active participation on the Forbes Tech Council, a winner of the Ernst & Young Entrepreneur of the Year Award, and a spot on the Washington Business Journal’s Women Who Mean Business list.


    • Facilitate effective communication with client project stakeholders regarding project status and recommendations.
    • Craft client code that is not just efficient, but also performant, testable, scalable, secure, and of the highest quality.
    • Actively participate in accurate planning and estimation efforts, utilizing project methods and tools.
    • Proficiently gather requirements and organize/present developed features for clients.
    • Execute complex activities within the current methodology and quality standards, showcasing success across diverse engagements.
    • Promote client success across the team by collaborating with engineers, designers, and managers to understand user pain points, anticipate potential problems, and iterate on solutions that drive client success.
    • Engage in agile software development, including daily stand-ups, sprint planning, team retrospectives, and other governance activities.
    • Actively participate in the Engineering Practice community, mentoring others through Communities of Practice (CoPs) or on project teams, and supporting the growth of technical capabilities.
    • Independently drive project delivery within defined architecture, demonstrating autonomy and accountability in all stages from conceptualization to deployment.


    • A minimum of 5+ years of experience/expertise in the following areas specified below*:
    • Implementing APIs, infrastructure and orchestration logic in Python.
    • Development of modern front-end applications using ReactJS
    • Hands-on experience with Observability tools to monitor applications and ensure their reliability and performance.
    • Bonus points: NoSQL databases, Splunk, API Documentation, Microservice Architecture
    • Experience in Agile software development methodologies.
    • Expertise in applying Object-Oriented Programming principles (abstraction, encapsulation).
    • High-level design proficiency following UML / C4 / ArchiMate.
    • Experience in creating and implementing well-tested, scalable, and performant enterprise-level systems.
    • Practice and initiative mentoring other engineers and decision-makers throughout the organization.
    • Good understanding of SOLID principles.
    • Familiarity with OWASP.
    • Proficiency in the English language.


    • Exposure to GitLab, CouchDB, PostgreSQL, Notion and Stoplight is nice to have
    • Object-Relational Mappers (ORMs)
    • Architectural (Microservices, Serverless etc) and Design (Factory, Singleton, Observer etc) Patterns
    • Unit Testing
    • Working in the Cloud
    • Containers using Docker/Kubernetes
    • Specific client-engagement specified technologies, which will be determined and vetted at the time of the interview.


    • Employer-funded medical plan for employees.
    • Employer-funded dental plan for employees.
    • 401K retirement savings plan Company paid disability and life insurance and the option to purchase additional coverage for yourself and family.
    • Unlimited PTO Policy
    • We promote a flexible work environment and encourage our employees to maintain a healthy work/life balance.
    • 11 Company paid Holidays
    • Generous Parental Leave