Please only post if you are looking to hire a freelancer or work as one. Small (2-5 person) agencies are fine, but recruiters, job boards, and so on, are off topic here.
Stack: Vue3, Ruby+Sinatra, Postgres, Railway, Cloudflare
We've built a new platform in the electronic music space, currently in limited beta, and we are seeking freelancers who love electronic music to help us with design, UI/UX, and infrastructure (major bonus points if you're an artist or promoter, or you travel extensively with music as a primary focus).
1) We want to scale our infrastructure up to 500 RPS while minimizing costs when it isn't in a burst period, validate that with load-testing, and set up monitoring, alerts, and auto-recovery mechanisms where possible.
2) We'd like a complete design and UI/UX refresh. This can be an individual who holds both sets of skills or two distinct people.
Please email ${this_username}@gmail.com if this sounds like a fit; every application will receive a response.
I am a full-stack developer with focus on PERN/MERN stack and over 10 years of experience delivering software. I have a strong background as a software architect and have successfully led teams as a fractional CTO. I have worked with clients from diverse industries worldwide. I have successfully delivered over 20 projects for a range of clients, including early stage startups, growing startups, solo founders, digital agencies, and notable companies like Apple and Binance.
Technologies: Node.js, PostgreSQL, MongoDB, AWS, Heroku, Datadog, React.js, JavaScript, Next.js, Apollo, GraphQL, data visualizations (D3.js, Mapbox, Leaflet), headless CMS (Contentful, Prismic, Strapi), Wordpress, Tailwind, Webpack, TypeScript, Web3 (ethers.js), Chrome extensions and more.
Portfolio: https://andrejgajdos.com/projects
Email: mail[at]andrejgajdos.com
Personal Website: https://andrejgajdos.com
LinkedIn: https://www.linkedin.com/in/andrejgajdos
Github: https://github.com/AndrejGajdos
Email: hackernews (at) eugengeist.com
LinkedIn: https://www.linkedin.com/in/eugen-geist/
Technologies & Skills: Software Engineering, Requirements Engineering, Data Modelling & Pipeline Design, Python, Golang, SQL, AWS, Azure, Kafka, DuckDB, Postgres, Airflow, Databricks, PySpark, Clickhouse, API design (full list on request) Experienced Engineer looking for Software / Data Engineering contracts.
I support you through all phases of the software development lifecycle - from planning and requirements engineering through development and testing until go live and maintenance.
8+ years experience in different industries (HFT, automotive, logistics, internet telecommunication technology, energy) helping customers to solve their problems.
As a seasoned software and data engineering expert, my extensive experience lies in developing and connecting software to various trading exchanges worldwide in different domains (inter alia XETRA, LSE, TSX, ASX, Binance, EPEX, Reuters,..).
I'm currently working on a "better Terraform" called unobin. https://github.com/cloudboss/unobin
My tech stack is largely Go, Python, Terraform, Kubernetes, Rust, Zig, any CI/CD system. AWS and GCP.
Website: https://cloudboss.co
GitHub: https://github.com/rjosephwright
Android Engineer, 5+ years shipping production Kotlin. Native Android - no React Native, no Flutter, no cross-platform shortcuts. I've been sole developer on apps with 10M+ Play Store downloads, and have worked on a national digital identity platform used by virtually an entire country. Currently building a full-stack video game price comparison platform solo which involves a Ktor backend, PostgreSQL, data pipelines, and daily live users.
Architecture, elegant and intuitive solutions is what I care about most. Codebases which are tested, modular, and built to last.
Besides Android, I also have experience building backends with Ktor as well cross platform development with Kotlin Multiplatform (KMP).
Stack: Kotlin, Jetpack Compose, MVVM, Coroutines, RxKotlin/Java, Flow, Hilt (Dagger2), Retrofit, Room, Ktor, Koin, Junit, MockK, PostgreSQL, Firebase, Git, Codex AI.
Looking for: Full-time permanent or contract. Remote preferred. Full resume and other details available upon request.
Contact: jobs.landslide859@passinbox.com (this is an alias)
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; invoicing/tax admin handled on my side. Work authorization in US (SS/EIN) and Spain (NIE). Note: Spanish availability is limited due to DNV limitations of no more than 20% revenue sourced from Spanish companies.
Location: Valencia, Spain
Remote: Yes
Willing to relocate: No
Technologies: Python (FastAPI, Langchain, LangGraph, Django), PHP (Laravel, Drupal)
Résumé/CV: https://ryneandal.github.io/ryne-andal-dnv-resume.pdf
Email: ryne[.]andal@gmail[.]com
Developer with decades of experience. In my last contract I helped a UK startup to pivot to a new market.
Tech :
- Typescript / React / React native / Node.js ... (all the bloody javascript ecosystem!)
- Python (Django)
- hands on the AWS console (ECS / lambda) / GCP console
- and more (databases / CI / CD / devops / authentication)
CV : https://raw.githubusercontent.com/k3roulas/two-group-theory/...
First website (1997) : https://web.archive.org/web/20010527202903/http://www.multim...
Last one (2026) : https://altqr.cc/
Technologies: Anything. Very strong with TypeScript, frontend and backend. Dove deep into every frontend library/framework under the sun. I love Bun. Very strong with Rust. Have used all mainstream languages.
I've built getinvoke.com - an open-source platform over the macOS accessibility DOM. It enables deterministic computer-use for agents: they explore an app, click around, etc. Then they note down the actual working steps for any UI task in simple JS. Then replay them.
Got good grips on how React, Svelte, Vue, Solid.js work, both internally, and in practical terms. Led the transition for a 350k MAU website from a jQuery mess to a rewrite in Vue + redesign of the component system.
I've built Ethereum/Web3 payment systems before.
Worked with realtime online gaming and implemented cryptographically provably-fair algorithms.
Came up with & implemented a pluggable AI workflow system (think n8n) in the GPT-3.5 days.
I love design and UX.
Email: merlindruzinec@gmail.com or merlin@merlin.audio
Senior Systems Architect and Technical Lead with 20+ years of experience. Current role involves managing teams and high-level architecture for international clients. While enjoyable, it leaves less time to write code or set up servers—the hands-on work I've always loved. Looking for freelance projects (~5 hours/day + weekends) to stay sharp and build interesting things.
Availability: Highly flexible. Easily adjust my schedule to align with US or Asia timezones for meetings and syncs as needed.
Backend & Data: Python, PHP, advanced SQL (MySQL/MariaDB), HTTP/REST APIs, complex web scraping architectures. Infra & Virtualization: Linux (Ubuntu/RHEL) kernel tuning, KVM, OpenVZ, high-availability clusters, AWS/GCP/Hetzner, Docker. Networking & Security: Nginx (caching & load balancing), Cloudflare, OpenVPN, BIND server administration, strict DNS security (DMARC/DKIM/SPF), firewall tuning.
Work Ethic: Detail-focused with zero tolerance for unhandled bugs and noisy error logs. Fast communication, proactive updates, and strict adherence to deadlines are standard.
Due to strict NDAs with current company/clients, public profiles are kept scrubbed. More than happy to complete a small paid test task or a time-boxed pilot project to demonstrate code quality and architectural thinking.
Treating your business as my own means delivering more than just ticket execution.
Focus is always on Cost Optimization: Identifying and eliminating cloud infrastructure waste. Revenue Growth: Structuring robust technical architectures that directly support business scaling. Proactive Prototyping: Suggesting and building architectural improvements instead of just waiting for instructions.
E-mail: mrt.pedro (at) outlook.com
Technologies: Ruby/Rails, JS/React/Redux/Node/TS/Angular, Elixir/Phoenix, Tailwind, MongoDB, Postgres, MySQL, Kafka, AWS, GCP, PHP, etc
Résumé/CV: https://www.linkedin.com/in/rhunterharris/ https://huntersoftwareconsulting.com/
Email: hunter[at]huntersoftwareconsulting.com
Hi, I'm Hunter, and I have 2 decades years of experience leading product technology organizations. I've worked with teams from 1 person to 400+ and successfully exited 4 times. Currently performing AI enablement, leading agentic design sessions, implementing standalone agents, and deploying software factories. Happy to chat about these and others.
Solo full-stack dev, US Army veteran. I ship production SaaS end to end: schema, auth, Stripe billing, deploys, on-call. Recent work: a competitive gaming league platform (real-time draft engine over SSE, computer-vision stat tracking, Discord integration), a sports analytics platform (cron ingestion pipelines, projection models), and a state-approved real-estate licensing LMS (183 lessons, 600 practice questions). AI-augmented workflow (heavily customized Claude Code setup) with real test suites and green CI across 10+ live codebases.
Stack: Next.js, TypeScript, Python/FastAPI, PostgreSQL, Prisma, Stripe, Docker
Portfolio: https://moderngrindtech.com
Rate: $85/hr or fixed-bid by scope
Email: david@moderngrindtech.com
* Location: Uzbekistan
* Remote: Yes
* Willing to relocate: Yes
* Technologies: Go, JavaScript, Node.js, React.js, Vue.js, PostgreSQL, MySQL, HTML, CSS, HTMX, Alpine
* Resume/CV: https://drive.google.com/file/d/1HJUT3qxr0XexsnYtP_8moQZgqyQ...
* Email: me@homeless.dev
* Portfolio: https://portfolio.homeless.dev
* Summary: I am full stack engineer, focused on backend, skilled in JavaScript, Node.js, Vue, React and Go. Switching to another technology stack is not a problem. I am looking for a team of highly competent developers to build great products.
Email: alexjblair10@gmail.com
Resume: https://drive.google.com/file/d/1KBlWzMINZWiGlVnFkMWyJKbEDWG...
I am a senior Full Stack AI Engineer with 8+ years building agentic AI systems, GenAI products, and AI-driven automation, backed by deep full-stack expertise in Python, FastAPI, TypeScript, React, and Next.js. Proven track record architecting multi-agent workflows and LLM-integrated platforms including an AI-powered ads platform that cut campaign launch time 6× and generative learning tools that reduced educator prep time 45%. Seeking to apply agent orchestration, LLM integration, and intelligent automation to accelerate product innovation and measurable business impact.
Location: Madison, WI
Remote: Yes Willing to relocate: No
Technologies: Clojure, Javascript, Firebase, Stripe etc.
Résumé/CV: https://www.linkedin.com/in/aaron-decker-3420a77b/
Email: aaron AT stronganchortech.com
Do you need the expertise of a seasoned software engineer for a project but don't have the budget for someone full-time? Need to get a project done quickly & well? I'm available 40+ hours/week through August 10th. (After that my availability is more limited since I teach Latin at a small Classical school). Standard Rate: $100/hour
Work experience:
- Built a tool (non-AI) to read Latin texts and generate fully-parsed glossaries. I used this tool in a few Latin readers I've published recently.(Tech: Clojure, SQLite, Ada)
- Built a billing system, using Stripe integration, for a B2B SAAS app.
- Fractional team lead for Learnics. Wrote a bibliography generator that supports MLA, APA, and Chicago style. (Tech: Vue, Firebase)
- Built the front-end for https://app.composer.trade, a systematic trading app. Took the company from designs all the way through launch. (Tech: Clojure/Script, Firebase)
- Built a video-hosting and sharing site for family videos. (Tech: Reagent, Clojure/Script, S3, CouchDB, Stripe)
- Created the https://github.com/deckeraa/couchdb-auth-for-ring/ open-source library that enables you to use CouchDB as an authentication back-end for Ring apps.
- Led a team of ~17 software developers for the business intelligence module of a large healthcare IT company.
Technologies: Python related (Async, Django, FastAPI, NiceGui)
Résumé/CV: https://buklijas.info/cv/Sasa_Buklijas_ENG_CV.pdf
Email: buklijas _.dot._ sasa _.@._ gmail.com
My timezone: Europe (CET)
20 years of technology experience. Worked as software engineer, development, design, architecture, administrator, QA, recruiting, management.
Web: HTML, CSS(Bluma, BootStrap), JavaScript(HTMX, DataStar)
DevOps: GitHub Actions, Ansible, Grafana, exporters(node, redis), Prometheus, Grafana Alloy, Linux, Docker
Data Analasys: Pandas, Notebooks, Visualizations (MatplotLib, Plotly)
QA Automation: Pytest, TestContainers, Selenium
Security: VPN, configuration
LinkedIn: https://www.linkedin.com/in/stevenirby1/
Email: <HN username at> stevenirby.me
Technologies: React, TypeScript, Next.js, Python, Django, Node.js, Tailwind, etc.
I took a break from freelancing for a while to run a crazy experiment. 25 projects in 25 weeks. A lot of it was experimental: https://stevenirby.me
It was a lot of fun. I was featured in TechCrunch, Engadget, and many more. I was on the front page of HN 4 times.
So now I'm looking for a freelance position where I can help a team with product development or AI stuff.
Hi! I work for clients in the US and Europe on projects across energy, edtech and finance. My most recent work has been heavily AI oriented, so I now call myself an AI Engineer, but I'm also a full stack web developer and throw up infra with terraform in GCP or AWS.
I'm familiar with a bunch of technologies, including but not limited to TypeScript, python, Unity3D, WebGL, .Net core, and others. I've been in this industry for 20+ years now and what I've seen work is the same now as it was then: solid communication, simple architecture, pragmatism, and velocity.
My rate is $110/hour and you can reach me at davedx@gmail.com - let's get shippin'!
Website: https://nightmode.dev
Hey there, I'm a software/devops engineer with over a decade of experience building and shipping products. I've worked with organizations and clients both small and large, and most recently have assisted organizations productionize their platforms, cost optimize infra, and streamline processes at every point in the SDLC.
Open to short or long-term contracts or a FTE depending on the opportunity. Please reach out david@nightmode.dev if interested. Github is https://github.com/darvid
SEEKING WORK | UTC-5
Technologies: PyTorch, Deep Learning, LLM, Diffusion models, NumPy, JAX (a bit), CUDA, C/C++ | SvelteKit, TypeScript, tailwind, drizzle | Linux (25 years), AWS, Docker, yada, yada, common sense
CV: https://alexey.work/cv?ref=48358236
Email: alexey.zaytsev@gmail.com
I fluctuate between:
- Deep learning / Neural networks - from architecture to inference. You might have used my ♥ Lovely Tensors library if you work with PyTorch (or JAX). Some CUDA, pytorch profiler, etc.
https://github.com/xl0/lovely-tensors https://github.com/xl0/lovely-jax https://github.com/xl0/lovely-numpy
https://github.com/xl0/tidygrad https://github.com/xl0/latent-tools https://github.com/xl0/nvml-tool
- Full-stack AI-adjacent applications - the usual LLM API tool-calling "agentinc" AI + full-stack web, ideally with SvelteKit (typescript, tailwind, shadcn, drizzle, etc).
https://chat.congusto.ai/chat https://lovely-docs.github.io https://pelican.alexey.work/gallery
In my past lives: Linux kernel development, Molecular Biology Masters degree, Electronics engineering in Shenzhen: https://alexey.work/cv?ref=48358236&view=full
I built 3 products from idea to paying customers. So I can help your startup with architecture, implementation plans, and writing specs that you need to keep vibecoding sane. Depending on whether I get into YC (or most likely not, applied with just an idea), I might have free time coming up in the upcoming months.
Technologies: React, Next, Remix, Vue, Typescript, Express/Node, Mongo, Mysql, AWS(Serverless), Laravel/PHP, Jest, Cypress, playwright, Ruby on Rails
Email: me+hn @ 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
Role: Software Developer
Location: India
Type: Full-time
Remote Work: Fully remote
Upwork history: https://www.upwork.com/freelancers/~01adc60eaf87e012ae?mp_so...
CV: https://drive.google.com/file/d/11Bz-FduL6G6nOdf8NbhDbBZD72n...
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)
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
* 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 (can’t name drop!) 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.
Contact: jon.north@adiuvat-consulting.com More: www.adiuvat-consulting.com
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
Role: Backend Engineer
Technologies: Ruby, Elixir, Go
Location: Australia
Remote: Yes, or hybrid Melbourne
Willing to relocate: Yes, within AU
GitHub: https://github.com/oshanz/
Website: https://oshanwisumperuma.com
LinkedIn: https://www.linkedin.com/in/oshanz/Angular & Ionic Developer
Location: Portugal
Remote: Yes, remote only
Willing to relocate: No
Technologies: HTML, CSS, JavaScript, TypeScript, RxJS, Angular, Ionic, Cordova, Capacitor
Résumé/CV: https://nunoarruda.com/resume.pdf
Email: nuno@nunoarruda.com
Software Engineer (15+ years) — I build what off-the-shelf & AI can't.
Ex-MIT/Triplebyte contractor, IEEE/Springer author, Berklee jazz musician.
Reach out at geotanjazz@gmail.com or via www.linkedin.com/in/georgetanev.
Location: Liverpool, England
Remote: Yes (Remote only)
Willing to relocate: No
Technologies: C#, .NET Core, ASP.NET, SQL Server/MySQL/PostgreSQL/MongoDB/EventStoreDB/Redis, RabbitMQ/Kafka, CQRS/Event Sourcing, Azure/AWS.
Résumé/CV: https://craigtp.co.uk/cv
Email: craig [at] craigtp.co.uk
Hi. I'm Craig. I'm an experienced Senior Software Engineer, Systems Architect and Microsoft Certified Professional with a passion for software development.
I work primarily, but not exclusively, with Microsoft technologies and the .NET / .NET Core frameworks, leading complex and challenging enterprise software development projects to successfully deliver robust, secure, scalable and efficient software solutions, encompassing over 30 years of experience in the field.
I'm passionate about distributed systems design, CQRS and event sourcing and a proponent of domain-driven design to ensure that solutions are laser-focused on solving real business problems. I'm an open source enthusiast and advocate using the best and most appropriate tools available, providing for an effective and pragmatic solution that delivers genuine and quantifiable business value.
Throughout my career I've helped numerous businesses of varying sizes in varying industries get their technology investment right and I can do the same for you.
Recent projects include:
+ Architected and executed a comprehensive overhaul of a core legacy system, migrating it to a robust microservices architecture. By strategically applying Domain-Driven Design, CQRS, and Event Sourcing, we enabled a prominent African FinTech company to seamlessly scale from 1 million to 10 million active users while achieving a remarkable 30%+ reduction in cloud expenses.
+ Successfully delivered an ambitious project to re-engineer a number of monolithic applications to cloud-native, event-driven distributed services for a leading hospitality software provider as part of a company-wide effort to modernise their entire software estate including training and mentoring staff on event-driven architecture and distributed system design.
+ Designed & delivered a large, global SaaS product to manage and automate music royalty collection and payment for one of the UK's largest and most demanding independent music publishers including full cloud geo-distribution & redundancy to ensure high availability & reliability for the worldwide client base.
+ Spearheaded the creation of a groundbreaking anti-motor fraud solution for a prominent UK law firm. This industry-leading platform combined a user-friendly web application, powerful API, and sophisticated data systems, including Europe's largest anti-fraud database, giving the firm an edge in fraud detection.
Location: EU
Remote: Yes (contract)
Technologies: TS/Next/React, Kotlin/Swift, C++, Python; Claude Code, Vercel AI SDK, LangChain
Résumé: https://www.ezulabs.com
Email: contact{at}ezulabs.com
For YC founders (or equivalent serious startups).
Ex-Silicon Valley engineer at junior-engineer cost. FAANG, YC, and OCV startup experience. Senior engineer by choice — IC track, no management ladder, working remote from the EU.
First task free, no invoice. Pick something off your backlog. I ship it. You decide.
No commitment after that. Contract, monthly invoice. Cancel anytime.
Free brainstorm calls — even if you never hire me. 30 min, no pitch.
EU timezone, 4 hours daily Bay Area overlap.
Willing to relocate: Yes, for a strong match
Technologies: Rust, Golang, Python, JavaScript/TypeScript, Next.js, React, Postgres, Redis, Docker, Kubernetes, Prometheus/Grafana, Ruby on Rails, Zig, EVM, DeFi
GitHub: https://github.com/allnil
Résumé/CV: https://docs.google.com/document/d/1i8Ob4fzTW-G-yPboUIzkXh6H...
Email: m.dev.nil@proton.me
I’m a senior generalist engineer with founding-style ownership. I like building systems end-to-end: protocol and product code, backend platforms, infrastructure, internal tools, and product-facing surfaces. Several times I was either an initial or an early hire in small and large-scale projects and products.
For the last two years, I was a founding engineer at Load Network, an early-stage L1 EVM chain with Arweave-based data settlement. I worked across the stack: developed protocol-level abstractions, consensus and execution clients, bootstrapped infrastructure, DevOps, and smart-contract prototypes. I also built private AI agent harnesses, ran multi-agent tests, and used LLMs for spec review and cross-client protocol design research and data gathering.
Before that, I spent six years in gamedev building backend platforms for massive-scale games at Strikerz/UFL (uflgame.com) and Vizor Games. I was an early hire, working directly with the CTO to build the infrastructure and design the system from the ground up. I engineered microservices for matchmaking, game economy/payments, quests, auth, moderation, and data pipelines (Kafka, Postgres, ClickHouse). I also managed Kubernetes, observability, internal admin tooling in Python/JS, and took part in high-stakes production launches.
I built my engineering foundation in enterprise Business Intelligence and Data Architecture. I shipped large-scale data warehouses (OLAP) for global companies (pharma, logistics), writing heavily optimized Oracle PL/SQL and T-SQL.
Open source: Merged contributions to the Ethereum ecosystem, including the Reth client in Rust, Flashbots SUAVE, and Alloy.
These days, I'm spending more time on product-facing surfaces (React, Rails), exploring Zig, and using LLMs for the right dose of entropy and speed.
Looking for: founding engineer, senior/staff software engineer, full-stack or backend roles where broad ownership and technical depth matter.