Kelyn Njeri
Résumé

Kelyn Paul Njeri

Senior Software Engineer & Product Leader

Nairobi, Kenya

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Accomplished senior software engineer and product leader with 8+ years architecting and delivering scalable distributed systems, data platforms, and full-stack applications across fintech, logistics, and SaaS. Co-founder & CPO at DataQRL. Pursuing graduate studies in Cognitive Science at the University of Osnabrück (Sep 2026).

Experience

DataQRL
Co-founder, Chief Product Officer & Chief Engineer
Mar 2025 – Present
Hamburg, Germany (Remote)
  • Architected & built the Data Monitoring System (7 integrated modules) from scratch.
  • Engineered DataPulse™, ReconFlow™, and SignalWatch™ as core platform pillars.
  • Developed Cortex™ AI orchestrator with Sentinel validation, Data Studio, and CaseHub™.
  • Implemented distributed entity resolution with Splink, hierarchical fidelity scoring, closed-loop verification across millions of records.
  • Led product strategy and recruited frontend engineer to enhance platform UI.
Backbone Technologies
Lead Software Engineer
Oct 2022 – Present
Memphis, USA (Remote)
  • Built backend infrastructure for an SME fintech platform — sub-100ms API latency.
  • Integrated Plaid (banking), Modern Treasury (interbank), Stripe (payments).
  • Designed data pipelines feeding ML use cases for analytics and growth.
  • Fixed critical session storage bug restoring OmniArsenal to operational status.
PowWater
Senior Software Engineer
Mar 2024 – Feb 2025
Nairobi, Kenya
  • Automated dispatch (fill-station assignment, route optimization, fleet mgmt) — cut delivery from 3h to 1.5h.
  • Rebuilt ops dashboard in React with real-time Google Maps tracking — +30% team performance.
  • Implemented unit, integration, and end-to-end test suites; integrated RabbitMQ for long-running dispatch.
Naya Labs & various startups
Independent Software Consultant
Aug 2017 – Oct 2024
Remote (DC, USA)
  • Architected OmniArsenal DevOps platform in Go/Docker/K8s — -40% CI/CD time.
  • Built Hero Alert (social activism) on AWS Fargate + Postgres + Twilio — +25% engagement.
  • Developed Veenly social e-commerce with real-time messaging and payments.
  • Reduced API latency 30% through query and caching optimization.
Sonolabs
Software Engineer
Apr 2020 – Jan 2021
Nairobi, Kenya
  • Built nutrition recommendation service in Flutter + TensorFlow + CV.
  • Deployed microservices on K8s with Helm; Redis caching cut response times 20%.
  • Implemented OAuth, encryption, SQLi mitigation across the platform.
Fundle
Software Engineer
Jan 2021 – Apr 2021
Nairobi, Kenya
  • Developed core features for a fintech fundraising platform.
  • Built RESTful APIs with input validation and error handling for financial workflows.

Skills

Languages
TypeScript · Python · Golang · JavaScript · SQL
Backend
Node.js · Express · NestJS · FastAPI · Flask · Gin · gRPC
Frontend & Mobile
React · Next.js · Flutter · React Native
Data & ML
Splink · Dask · Pandas · TensorFlow · DoWhy · Causal Inference · Entity Resolution
Databases
PostgreSQL · MongoDB · Redis · DynamoDB · Neo4j · MySQL · Qdrant
Cloud & DevOps
AWS (ECS, Lambda, S3, RDS) · GCP · Docker · Kubernetes · Terraform · CI/CD
Messaging
Kafka · RabbitMQ · Event-Driven Architecture
Observability
Prometheus · Grafana · Sentry
Architecture
Microservices · CQRS · DDD · REST · API Gateway · Distributed Systems

Education

Applied Data Science Program
Massachusetts Institute of Technology
January 2024 – Apr 2024
B.Sc. Computer Science
Laikipia University
August 2017 – Dec 2022