Valerii Martseniuk

Engineering Manager

[email protected] | valmb.com | LinkedIn | United States

Summary

Engineering Manager leading two teams (10 engineers) reporting to the CTO at Newsela, an edtech platform serving millions of K-12 students and teachers. Shipping AI-powered features that reached top-tier adoption within weeks. Track record of delivering cross-org initiatives spanning 6+ teams without dedicated program management. Currently driving spec-driven development across the engineering org - an AI-native methodology compressing requirements-to-implementation, with early results showing ~50% faster ticket completion.

Key Achievements

  • Led LLM-powered feature delivery (OpenAI, Gemini) that reached the platform's highest adoption tier within weeks of launch - zero PII sent to external models, with a novel content evaluation framework built from scratch
  • Consolidated ~12 microservices into a single monolith with zero production incidents; transformed a system with zero observability into a fully monitored platform (Datadog dashboards, alerts, on-call rotation)
  • Coordinated cross-org initiative spanning 6+ teams with no dedicated project team - secured a major district renewal (direct revenue impact) and set architecture precedent for future content types
  • Drove spec-driven development adoption across product and engineering, securing buy-in from senior product leadership - versioned specs as single source of truth, consumable by LLM coding agents
  • Developed IC into Tech Lead through epic captain model; engineer later promoted to lead another team

Experience

Newsela

EdTech platform serving millions of K-12 students and teachers | 2018 - Present

Engineering Manager

Jan 2025 - Present | 2 teams (Plan & Deliver + Writing), 10 direct reports, 70-person engineering org, reporting to CTO

People & Team Building:

  • Built culture of team-driven innovation: engineers independently replaced vendor TTS system (AWS Polly) with open-source solution (Coqui TTS), expanding language support and reducing costs - came from the team, not the roadmap
  • Currently managing dual EM + interim TL responsibilities during leadership transition while maintaining delivery velocity
  • Addressed performance gaps through structured, multi-month feedback processes with documented expectations and clear outcomes
  • Developed IC into interim Tech Lead through epic captain model; engineer later promoted to lead another team

Product & Strategy:

  • Co-led product discovery at story mapping stage for every major initiative - defined success criteria and measurement plans before engineering work began
  • Led delivery of LLM-powered graphic organizers that became one of the platform's most-used features within weeks - zero PII exposure, novel evaluation process
  • Led technical planning for Generation Genius video integration (1,000+ videos) - coordinated across product, engineering, content, and the acquired company's team to ship on time for Back to School
  • Established experimentation culture: teams now propose segmentation strategies and run controlled rollouts to validate impact

Technical Leadership:

  • Led consolidation of ~12 microservices into a single monolith - zero production incidents, from zero observability to comprehensive monitoring
  • Drove Writing platform migration using strangler pattern - maintained production stability for millions of users through Back to School launch
  • Resolved critical data integrity escalation, then transformed the response into lasting infrastructure: daily health instrumentation, threshold-based alerting, overhauled on-call processes
  • Introduced central spec repository where product commits requirements as PRs - architecture decisions and data models are versioned artifacts enabling AI-assisted implementation

Tech Lead

Aug 2022 - Jan 2025 | Learning Delivery / Plan & Deliver team

  • Designed content visibility system V2 architecture - replaced tens of thousands of individual content IDs per user with a handful of set slugs; described internally as "one of the biggest projects in company history"
  • Created phased TRD framework for Generation Genius integration (12 revisions with stakeholders); adopted org-wide as the reference model for cross-team planning
  • Shipped a differentiated instruction feature and content visibility V2 on the same day - both on time, zero critical bugs during 5-week experiment period with 40% of paid users
  • Drove domain language standardization across platform and BI teams - eliminated recurring cross-team confusion and enabled consistent analytics

Senior Software Engineer

2020 - Aug 2022

  • Built platform API integrations (LTI, Google Classroom, Canvas, Schoology, Clever) enabling SSO and roster sync for tens of thousands of teachers
  • Promoted through three levels in four years (Software Engineer to Senior to Tech Lead)

Software Engineer

2018 - 2020

Immersion

2017 | 4 months

  • Designed automated blue-green deployment pipeline (Terraform, Python) replacing fully manual EC2 process

SoftServe (contractor for Amplify)

2013 - 2016 | 3.5 years

  • Full-stack engineer on Amplify's education platform (Python, JavaScript, Java, MongoDB, MySQL) with CI/CD and AWS infrastructure

Education

  • M.S. Computer Science - United States
  • M.S. Applied Mathematics / Automation Engineering - Ukraine

Technical Skills

Languages
Python, TypeScript/JavaScript, SQL
Frameworks
Django, Flask, FastAPI, React, Next.js
AI/ML
LLM integration (OpenAI, Gemini), prompt engineering, LangFuse, evaluation frameworks
Infrastructure
AWS, CI/CD, Docker, Terraform, Datadog, monitoring/observability
Data
PostgreSQL, MongoDB, MySQL, data modeling, API design
Process
Spec-driven development, domain-driven design, TDD, Scrum, cross-functional coordination