Technologies: Go, Postgres, Vue, WordPress, PHP, JS, (S)CSS
I have over 15 years of experience building custom WordPress sites, Vue apps, and the Go backends to power them. I'm a full-stack developer who can handle front end, backend, hosting, and ongoing maintenance. Some examples of my work:
- I built a custom WordPress site for a major airline's in-flight magazine, starting from mockups. The work involved hand-crafted CSS, a Vue booking app and API integration, interactive maps, and custom CMS features for advanced publishing workflows.
- I built, and have maintained for over 10 years, the WordPress site and Go + Postgres backend for a subscription box company. The backend handles subscriptions, renewals, billing, shipping, and analytics integrations.
- I built a Go + Vue + Postgres platform for an AI startup over several years, delivering web traffic insights to customers. It handles membership, large-scale data ingestion, and content management.
Available for hourly or per-project work.
Website: https://cdbtech.com
Email: hn[@]cdbtech.com
Interested in: Part Time/Contract Time Zone: US time zones
Technologies: React, Next, Remix, Vue, Typescript, Express/Node, Mongo, Mysql, AWS(Serverless), Laravel/PHP, Jest, Cypress, playwright, Ruby on Rails, Shopify, Hydrogen
Email: me+hn @ segoviacristian dot com Website: segoviacristian dot com
Have 6+ years of experience working at US based startups and small companies. Looking for full stack roles, though open to frontend or backend roles as well. Speak English at an advanced level. Looking for part time/contract roles
ML/LLM and systems engineer working in Python/PyTorch and Rust. 8+ years of professional experience with Python and machine learning; 5 years of production Rust. PhD in math, MSc financial economics, MSc neuroscience
Available for freelance work on:
- performance: profiling Python services, identifying bottlenecks and moving performance-critical code into Rust w/ PyO3
- LLM systems: agentic workflows with tools, planning and evaluation; inference serving w/ vLLM and TensorRT; edge inference
- Backend and data systems/data engineering: async Rust services, databases and high-throughput data pipelines.
- Quant and finance: backtesting engines, financial risk and fraud modeling
- Image and audio: applied ML, including generative models
Recent Rust projects:
- Leone: LLM inference engine written from scratch with my own CUDA/Metal kernels and a OpenAI-style server (https://github.com/t0rsion/leone)
- Holos: persistent homology/topological data analysis library with SOTA speed (https://github.com/t0rsion/holos)
B2B invoicing through my own company
Stack: Rust (Tokio, Axum/Actix, PyO3, Polars/Arrow), Python (PyTorch, NumPy/Pandas, Django/Flask), vLLM, TensorRT, Ray, Postgres, ClickHouse, Qdrant, Redis, Kafka, Docker, Kubernetes (k8s), gRPC, CUDA and Metal kernels.
Email: hn (the-at-symbol) vixe (dot) re
Senior software engineer and independent consultant (15+ yrs), currently based in Valencia, Spain (CET). I do primarily backend work in Python (Django/FastAPI/Flask) and PHP (Laravel/Drupal), API development and consumption, data pipeline work, and AI integration features (RAG, LangChain/LangGraph, vector DBs). Strong infra/ops chops (Docker, CI/CD, Kubernetes, Linux), comfortable owning projects end-to-end and mentoring.
Remote-first, with a reliable 4-hour daily overlap with US business hours. Work authorization in US and EU.
CV: https://ryneandal.github.io/ryne-andal-dnv-resume.pdf Email: ryne[.]andal@gmail[.]com
I provide contract or ad-hoc services and support to startups, growth companies and enterprises. I'm often called to set up greenfield DevOps installations, architect and build cloud infrastructures, design platform architectures, build cloud-based, SaaS and mobile products and assist with emergency or short-staffed situations.
I also provide fixed-price services which are often ideal for startups: Azure / AWS cloud builds; DevOps greenfield setup; security / DevOps reviews; alerting / monitoring builds; training; support; emergency services.
Some examples of my work:
* Greenfield Azure DevOps and Azure Cloud implementation for a FinTech company
* Ethereum L1 packer-based automation; Solana smart contracts
* Global multi-cloud PaaS cloud & DevOps design for a major data platform
* Architecture & development for custom clouds
* Solr / Lucene search solutions
* AWS / Azure startup cloud builds
* NodeJS / React mobile app development
I'm a senior technical specialist for startups. I offer assessment, planning, strategy, architecture, design, build, deploy and management services.
I have 25+ years of hands-on experience across all IT roles. I tune my deliverables to exactly what the client needs. I don't do one-size-fits-all solutions. I know how to use AI intelligently, when it works and when it doesn't. I don't do vibe coding.
Some of the things I've done recently:
- Stealth startup: Agentic build of a v1 streaming service: production quality design, billing/analytics/reporting engines, PWA, catalog import, play tracking
- Publishing startup: Built a pipeline for automated translation, validation and generation of .indd documents for ebooks
- Fintech startup: Greenfield DevOps implementation (cloud architecture, IaC, CI/CD) in a regulated environment
- Social media startup: ML pipeline for programmatic detection of social and music trends based on media plays
- Ecommerce startup: Designed an ML-powered analysis system to correlate search results and purchase behaviour
I am a backend expert, having built and maintained mission critical, low latency and highly available systems for many companies over the last 10 years, in addition to over 20 total years of software development experience. I learn new things extremely quickly. AWS preferred but not required (I hold a variety of certs, available here: https://www.credly.com/users/jon-north.ad78f0c8)
Concrete examples:
* built the primary streaming data architecture for realtime game player tracking information (all games, 50ms SLA) and game stats for one of the top 3 US sports leagues using Redpanda/Kafka on Azure+Terraform, and implemented its developer portal using Gravitee to provide first class streaming API support and monetization. Also built, deployed and maintained their ask-a-question-get-a-true-answer AI bot to expose 20+ years of stats to natural language fan questions! (this was the third of currently four times I’ve built similar architectures for different companies)
* Implemented a vector DB for one of the leading AI image hallucination platforms (millions of users) to provide an image similarity service.
* replatformed dozens of complex quant jobs to AWS Lambda for a startup hedge fund (~$1B AUM), vastly improving QoS and maintenance cost. Line 1 to platform-in-prod time 3 months, including refactoring for fit. This was mission critical cannot-fail stuff and required extensive proof of correctness.
* built a framework to collapse dozens of singleton ETL programs into one config-driven, simple C# application performing the same functionality at ~80% reduction in maintenance cost year over year.
You will like working with me because I:
* hold your goals as my priorities
* communicate verbosely yet synthesize well
* my rates are reasonable in exchange for the value I deliver
* I guarantee I will get the job done
Technologies: Python, C/C#/C++, SQL, NoSQL, Go, Golang, Docker, Git, Linux/Windows, Bash, Kafka, Redpanda, PySpark, Spark, AWS, Azure, GCP, Terraform, Kubernetes, Redis, Postgres, MySQL, SQL Server, SAP HANA, LDAP, Active Directory, OAuth2 AI: However you roll is fine. Agentic, just-generative, or write by hand. I’m fine with any of it. The important thing is crushing your goals.