Freelance Data Engineers in LortonFreelance Data Engineers in Lorton
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D’Mya Sanford's avatar
D’Mya Sanford
Washington, USA
Automating the boring stuff = better work/life balance.
$1k+
Earned
2x
Hired
1
Followers
Automating the boring stuff = better work/life balance.
Cover image for Digital Transformation Plan: AI Strategy
Digital Transformation Plan: AI Strategy
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37
Cover image for CRM Data Migration : AI Data Prep
CRM Data Migration : AI Data Prep
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21
Cover image for Netflix Customer Demographic Visualizer: AI Data Analysis
Netflix Customer Demographic Visualizer: AI Data Analysis
0
52
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Data Engineer(2)
serhan sari's avatar
serhan sari
District of Columbia, USA
Backend, Frontend, DB, Cloud | 10+ yrs Exp.
Backend, Frontend, DB, Cloud | 10+ yrs Exp.
Cover image for Worked with Enterprise Data Pipeline
Worked with Enterprise Data Pipeline
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15
Cover image for Personal Drive on AWS S3
Personal Drive on AWS S3
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13
Cover image for Investing Platform Conversion
Investing Platform Conversion
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6
Cover image for Volkswagen website (https://www.vw.com)
Volkswagen website (https://www.vw.com)
0
11
Data Engineer(3)
Michael Gould's avatar
Michael Gould
proLorton, USA
Workflow automation for forms, CRMs, Zapier, Make, n8n.
New to Contra
Workflow automation for forms, CRMs, Zapier, Make, n8n.
Cover image for Self-initiated internal product. Odds Desk
Self-initiated internal product. Odds Desk uses public data only. It is not client work, a trading tool, or financial advice. I built this because a research brief is only as trustworthy as the source snapshot behind it. Catalog freshness, derived summaries, file identity, and editorial status need to stay consistent across every generated artifact. The workflow synchronizes a public catalog, exports one canonical bundle, generates and validates a summary, regenerates a manifest, checks declared SHA-256 values against disk, and produces a dashboard and Markdown brief from the same saved files. The workflow fails closed. If a required validation fails, the bundle stops, the evidence is preserved, and no buyer-ready issue is produced. The gallery shows a July 30, 2026 snapshot with 675 saved markets, 36 unverified research leads, zero verified cards, and four of four declared hashes matching disk. The state remains RESEARCH_PREVIEW. Best fit: public API ingestion, reproducible research bundles, validation pipelines, provenance checks, fail-closed editorial workflows, and automated briefing systems.
0
39
Cover image for HVAC Lead Handoff Rescue Case Study
HVAC Lead Handoff Rescue Case Study
0
3
Cover image for A self-initiated workflow automation demo
A self-initiated workflow automation demo showing a simple lead handoff: intake, routing, CRM or sheet logging, owner notification, and test-ready review output.
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39
Cover image for A self-initiated Brief Factory internal
A self-initiated Brief Factory internal system. The gallery shows public post titles only. No names, handles, contact details, or private messages are shown. I built this to make public automation research more consistent. Instead of manually checking communities for scattered requests, the monitor reads selected RSS and Atom feeds, normalizes source URLs, rejects stale or generic items, scores observable workflow pain, deduplicates accepted rows, and records source health. The output is a structured review queue, not permission to contact anyone. The system does not post, bid, message, or send. The gallery shows a dated run from July 30, 2026: seven configured feeds, seven review rows, two HTTP 429 rate limits, zero high-intent rows, and zero external actions authorized. Best fit: public-source monitoring, qualification queues, source-health reporting, research triage, and review-first opportunity workflows.
0
36
Data Engineer(1)
Michael Bennett's avatar
Michael Bennett
Takoma Park, USA
AI Systems Builder | Security | Automation
New to Contra
AI Systems Builder | Security | Automation
Cover image for QuantumShield Core — Governed AI
QuantumShield Core — Governed AI Security Operations Platform. Problem: Organizations using AI for security cannot prove, months later, that a human actually reviewed and governed AI output. When audits arrive, they have timestamps but no evidence of judgment. What I built: A production governance platform where every AI-assisted security decision goes through human review with mandatory written reasoning. Every decision is recorded in an immutable, append-only log that can be replayed step-by-step. The system enforces strict rules: no autonomous governance action, no hidden fallbacks, no record deletion. I built the operator interface, validated structural integrity, and documented the entire governance philosophy. Key capabilities: human-in-the-loop approval gates, decision replay, lineage visualization, governance scenario training lab. Tools: Python, JavaScript, PostgreSQL, Security Architecture, Governance Design. Learn more: https://quantumshieldlabs.dev/
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66
Cover image for I extended the open-source Paperclip
I extended the open-source Paperclip project into a multi-company AI operations control plane with real cost and governance controls. Every agent operates under per-project budgets with automatic hard-stops. Board governance includes approval gates for hiring agents and strategy changes. Built with TypeScript, React, PostgreSQL, Drizzle ORM, and Express. Open-source contributions are public; proprietary extensions available under NDA.
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51
Cover image for TheBinMap is a 528-page nationwide
TheBinMap is a 528-page nationwide directory of liquidation bin stores that I built from zero to live in under 10 weeks. It uses an automated data pipeline — Google Places discovery, AI enrichment, and static page generation — with zero server costs. It ranks on competitive local search terms and has multiple monetization paths. Built with Astro, Python, SQLite, and DeepSeek LLM integration. Live at thebinmap.com (http://thebinmap.com).
0
60
Cover image for I identify security and protocol
I identify security and protocol gaps in major open-source infrastructure and ship fixes upstream. Contribution to Coinbase's x402 micropayment protocol (merged PR): added a security API built with TypeScript. Contribution to OQTOPUS quantum ecosystem (PR #79): built a zero-dependency Python attestation module using standard-library SHA-256 cryptography that detects tampered quantum hardware jobs. Full details at mbennett-labs.github.io/contributions.html (http://mbennett-labs.github.io/contributions.html).
0
60
Data Engineer(1)
Muhaned Mohamed's avatar
Muhaned Mohamed
proDale City, USA
Data Analytics & BI Consulting for Gov, Higher Ed, Finance
New to Contra
Data Analytics & BI Consulting for Gov, Higher Ed, Finance
Cover image for Data Mapping & ETL Architecture
Data Mapping & ETL Architecture — a generic reference diagram I use to walk clients through my approach: source system inventory, documented transform logic, a governed warehouse layer, then BI consumption. Used as a starting template on engagements, then adapted to the client's actual systems.
0
2
Cover image for Data Lineage & Quality —
Data Lineage & Quality — Global Financial Services Firm. Real professional experience (employer name withheld per confidentiality practice): produced data lineage, mapping, and quality documentation for enterprise analytics initiatives, ran complex SQL transformations supporting financial processing and reporting tools, and facilitated stakeholder meetings to define business requirements.
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3
Cover image for Analytics Leadership — International Education
Analytics Leadership — International Education & Cultural Affairs Org. Real professional experience (employer name withheld per confidentiality practice): led a 20-member analytics team through a multi-year enterprise learning portal project, designed and maintained Power BI data pipelines and visualizations across multiple enterprise sources, owned data governance and integrity institution-wide, and built automated reporting for senior leadership.
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2
Cover image for Multi-System Data Integration — Defense
Multi-System Data Integration — Defense Program Office. Real professional experience (employer name withheld per confidentiality practice): provided data integration and analytics support for an international defense consortium, led SQL development and data transformation with data lineage/mapping documentation, and built Power BI dashboards for enterprise reporting.
0
1
Data Engineer(1)