Steph Colen

VP of Engineering

Washington, DC, United States15 yrs 5 mos experience
AI EnabledAI ML Practitioner

Key Highlights

  • Reduced LLM latency by 60% in six weeks.
  • Delivered first production release in three weeks.
  • Led cross-functional delivery of a nationwide credit card launch.
Stackforce AI infers this person is a SaaS expert with a strong focus on AI platform architecture and organizational design.

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Skills

Core Skills

Engineering ManagementPlatform ArchitectureArtificial Intelligence (ai)Cross-functional Team LeadershipData SecuritySoftware ArchitectureFront-end Development

Other Skills

PythonAmazon Web Services (AWS)Continuous Integration and Continuous Delivery (CI/CD)Retrieval-Augmented Generation (RAG)Team TopologiesFedRAMPOrganizational DesignAWS BedrockLarge Language Models (LLM)AWSJavaRoadmappingMicroservicesHiringAgile Transformation

About

I build and scale AI platform systems in enterprise environments — and I design the organizations that deliver them. At Appian, I lead multi-team engineering efforts focused on scalable AI capabilities across the platform. I stood up a 0→9 engineer AI platform team, delivering our first production release in three weeks, defined LLM integration patterns (RAG, AWS Bedrock, semantic search), and helped expand enterprise AI adoption in regulated environments (FedRAMP Moderate/High, SOC2, HIPAA, PCI). I care deeply about translating architecture into measurable business leverage. That’s meant reducing LLM latency by 60% in six weeks, expanding GA availability from 55% to 97%, running an $826K vs $76K infrastructure analysis to eliminate ~15% productivity drag across teams, and redesigning a 25-engineer organization around capability-aligned Team Topologies to accelerate delivery. Previously, at Cardless, I served as Engineering Manager and Interim Co-Head of Engineering, leading cross-functional delivery of the Simon American Express credit card nationwide and reorganizing engineering into full-stack squads to improve ownership and predictability. I’m particularly energized by AI-forward, operationally mature environments where platform architecture, organizational design, and measurable impact intersect. I enjoy building systems — technical and organizational — that make ambitious AI ideas practical, reliable, and scalable.

Experience

15 yrs 5 mos
Total Experience
2 yrs 4 mos
Average Tenure
1 mo
Current Experience

Github

Staff Software Engineering Manager

May 2026Present · 1 mo · Remote

Appian corporation

7 roles

Manager of Software Development — AI Platform & Intelligent Search

Promoted

Apr 2024May 2026 · 2 yrs 1 mo

  • I lead multi-team engineering efforts building scalable AI platform systems within Appian’s enterprise product suite. My focus is on translating applied LLM architecture into durable platform capability, measurable business impact, and reliable enterprise delivery.
  • Established company-wide AI platform capability by standing up a 0→9 engineer ASAIP team; delivered first production release in 3 weeks and defined LLM integration patterns (RAG, AWS Bedrock, Anthropic) used across multiple product surfaces.
  • Reduced LLM latency 60% (~20s) within 6 weeks and expanded GA availability from 55% to 97%, enabling broader advanced-tier rollout.
  • Architected and launched Data Fabric Chat using early agentic patterns; improved customer dataset accuracy from 5% → 90% in production environments.
  • Defined multi-quarter AI platform roadmap for 3 teams during OP2 planning, sequencing architectural investments to reduce dependency drag and delivery risk.
  • Re-architected a 25-engineer organization around capability-aligned Team Topologies to accelerate multi-team AI delivery.
  • Led $826K vs $76K three-year infrastructure analysis, eliminating ~15% productivity tax across 3+ teams while maintaining compliance and performance requirements.
  • Delivered FedRAMP Moderate/High compliance for AI Copilot features within one week by coordinating Engineering, QE, InfoSec, and AWS stakeholders.
  • Reduced CI time 45% via monolith modularization; redesigned department DB CI workflow (15 → 5 jobs), saving ~15 engineering hours per PR.
PythonEngineering ManagementAmazon Web Services (AWS)Continuous Integration and Continuous Delivery (CI/CD)Retrieval-Augmented Generation (RAG)Team Topologies+5

Technical Manager of Software Development — Document Extraction & AI DX

Mar 2023Apr 2024 · 1 yr 1 mo

  • Led an 8-engineer team delivering AI-enabled document extraction capabilities within Appian’s enterprise platform, balancing architectural rigor with tight cross-team dependencies during rapid AI expansion.
  • Reduced feature integration complexity from 26 engineering changes to 7 by introducing composable interface abstractions, decreasing duplication, CI runtime, and long-term maintenance overhead.
  • Served as architectural decision-maker for cross-service capability management, error-handling standards, and AWS Textract integration while preserving strict backward compatibility guarantees.
  • Sequenced incremental delivery across tightly coupled platform subsystems, improving predictability while managing unplanned enterprise-impacting work.
  • Introduced structured feature planning framework aligning leadership-defined AI objectives with execution-level increments.
  • Elevated engineering quality through modular design patterns, SOLID principles, and improved abstraction boundaries in Java-based services.
PythonArtificial Intelligence (AI)Amazon Web Services (AWS)Cross-functional Team LeadershipContinuous Integration and Continuous Delivery (CI/CD)Platform Architecture+2

Technical Manager of Software Development — Record Access Management

Oct 2021Mar 2022 · 5 mos

  • Led development of core data security and access control abstractions within Appian’s Records platform, shaping enterprise-grade row-level security configuration at scale.
  • Designed and implemented dynamic row-level security framework enabling enterprise customers to configure access controls without custom RDBMS views.
  • Served as technical lead and process owner for high-visibility platform subsystem balancing feature delivery with architectural stability.
  • Introduced structured technical coaching program increasing junior engineer velocity and raising squad-level technical bar.
  • Improved clarity of ownership and incremental delivery cadence within security-focused feature releases.
Engineering LeadershipData SecuritySQLPlatform ArchitectureEnterprise SoftwareJava

Senior Software Engineer — Records & Query Framework

Apr 2019Sep 2021 · 2 yrs 5 mos

  • Operated as senior technical lead and squad coach within a 9-team, year-long platform initiative focused on data consolidation and enterprise query capabilities.
  • Designed a unified data access framework consolidating distributed data connections into a single abstraction layer for application developers.
  • Architected a query framework enabling implicit joins across enterprise datasets, reducing developer complexity and improving consistency.
  • Ensured successful first delivery of a multi-team initiative by aligning architecture and execution across 9 squads; recognized as Engineering MVP.
  • Served as subsystem SME for Appian Records, resolving high-visibility enterprise issues and expanding documentation to scale platform knowledge.
  • Awarded inaugural Force Multiplier recognition for consistently elevating squad performance and cross-team collaboration.
Technical LeadershipSQLPlatform ArchitectureEnterprise SoftwareSoftware ArchitectureJava

Software Engineer II — Frontend Modernization & Platform Systems

Aug 2016Mar 2019 · 2 yrs 7 mos

  • Prototyped overhaul of Appian Records sources and security models, reducing platform risk and informing company-wide architectural redesign.
  • Founded and led a 10-developer initiative to productize a rich text editor across the platform (React, ProseMirror, Java).
  • Re-architected custom web elements framework to support single-page applications, improving authentication, rendering, and performance.
  • Eliminated 100,000+ lines of legacy code during multi-year modernization effort, increasing maintainability across stack layers.
  • Designed extensible notification and UI configuration architecture enabling future feature expansion without structural rework.
  • Led engineering interns to deliver a high-demand feature within 6 weeks, reinforcing early team leadership experience.
Technical LeadershipFront-End DevelopmentSoftware ArchitectureJava

Software Engineer - Frontend Platform & Developer Tooling

Jul 2015Jul 2016 · 1 yr

  • Designed and implemented reusable custom web elements and a 508-compliant interactive icon picker component for Appian interfaces.
  • Built internal code-generation tooling to standardize validation handling across current and future UI components.
  • Contributed to early frontend modernization efforts transitioning from GWT to React-based architectures.
  • Stepped into Squad Coach responsibilities during high-visibility feature delivery and promoted to primary Squad Coach within 4 months.
  • Co-founded an internal engineering guild delivering technical workshops to local college and high school hackathons.
Technical LeadershipFront-End DevelopmentSoftware ArchitectureJava

Software Engineering Intern

May 2014Aug 2014 · 3 mos · Reston, VA

  • Worked in a small team to integrate a user-facing search into the existing Appian product, create inline image preview galleries for any image attachments and render inline PDF thumbnail previews in Tempo news feeds, optimized the Appian feed for mobile clients to minimize extraneous queries, and created an Appian SAIL collapsible section component for use within the Appian Interface Designer. All features are being used by more than 3.5 million users. They use native browser and mobile technologies and do not require client side plugins like Flash or Java. Features include cross-browser and cross-platform compatibility, full language and internationalization capabilities, and full compatibility with early versions of the product, among other characteristics.

Cardless

2 roles

Software Engineer

Mar 2022May 2022 · 2 mos · Washington, District of Columbia, United States

Amazon Web Services (AWS)

Engineering Manager / Interim Co-Head of Engineering

Jan 2022Jan 2023 · 1 yr · Washington, District of Columbia, United States

  • Joined Cardless during rapid growth to lead cross-functional engineering delivery in a regulated fintech environment.
  • Led engineering squads during nationwide launch of the Simon American Express credit card, delivering transaction geofencing, earning caps, and dynamic user experiences at scale.
  • Served as Interim Co-Head of Engineering, partnering with executive leadership on roadmap sequencing, technical prioritization, and staffing strategy during organizational transition.
  • Owned delivery timelines to brand partners, aligning engineering execution with external launch commitments and regulatory constraints.
  • Mentored and influenced peer Engineering Managers, establishing planning standards and improving cross-team alignment practices.
  • Owned hiring for 4 engineering roles, defining scope, leveling, and team capacity during scale-up.
  • Reorganized engineering into full-stack squads, improving ownership clarity and delivery predictability.
  • Standardized validation framework across microservices (Java, Spring), increasing DI and unit testing adoption across services.
Engineering ManagementAmazon Web Services (AWS)Cross-functional Team LeadershipRoadmappingMicroservicesHiring+1

Boeing

Business Intern

May 2013May 2014 · 1 yr · Puget Sound - Seattle

  • Worked for the Global Technology group, a section of BR&T devoted to research, collaboration, and technology trend scouting: position involves redoing their website to match the new Boeing standards and updating the content, developing a dashboard to display the "trends of trends" for the Scouting group, and beginning to implement that dashboard.

University of virginia

CS 1110 TA

Jan 2013May 2015 · 2 yrs 4 mos · Charlottesville, Virginia Area

  • Taught complicated programming concepts to students of all skill levels
  • Helped lead a seminar on computer science education best practices
  • Developed coding and test questions to test practical knowledge

Main street arena

Learn to Skate Instructor

Oct 2012May 2015 · 2 yrs 7 mos · Charlottesville, Virginia Area

Mytonomy

Intern

Jun 2012Aug 2012 · 2 mos

Mitre

Technical Summer Intern

May 2012Jan 2013 · 8 mos · McLean, VA

  • Worked in CAASD on designing and implementing a GUI for a tool to be used by air traffic controllers that would prevent some runway incursions. Used Java Swing, properties files, and implemented the ability to dynamically change the configuration of the software for demonstration and testing purposes. Tested the GUI design and functionality on real air traffic controllers and modified it appropriately, and presented the state of the project to FAA representatives twice.

Ashburn ice house

Learn to Skate Instructor

Jan 2011Jan 2014 · 3 yrs · Ashburn, VA

Tic summer camp

Programming Counselor

Jun 2010Aug 2011 · 1 yr 2 mos · McLean, VA

Education

University of Virginia

Bachelor of Science (BS)

Jan 2011Jan 2015

TJ

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