Ask HN: Freelancer? Seeking freelancer? (July 2025)
Please lead with either SEEKING WORK or SEEKING FREELANCER,
your location, and whether remote work is a possibility.
Please only post if you are personally looking to hire a freelancer or work as one. Agencies, recruiters, job boards, and so on, are off topic here.
228 comments
[ 2.4 ms ] story [ 171 ms ] threadFull-stack software engineer with machine learning skills. I have a decade of experience building successful products for early stage startups and larger organisations.
Most of my experience has been developing new greenfield projects in contexts with significant uncertainty. I navigate this through careful consideration of stakeholder needs, business requirements, and an iterative approach. Beyond new projects, I have also worked extensively with a wide range of existing front-end and back-end systems. I get up to speed and can be effective quickly.
I am familiar with cross-functional teams of 5-10 people in design, product, and engineering roles. Alongside this, I have experience working with smaller select teams tasked with building the technical foundation of a startup.
I consider myself a “product engineer” in the sense that I focus on the product as a solution to end users’ problems, not a technical challenge. Over the years I have worked with many designers, user researchers, and user experience professionals who have shaped my attitude towards software. User experience is paramount to me and I can create effective user interfaces without aid of an existing design. My overall outlook is entrepreneurial and product-focused.
I have a GitHub with open source projects that have thousands of active users, and the bulk of an MSc in artificial intelligence.
Available for remote opportunities. I can accommodate flexible working patterns to suit different needs. I am also open to project-based work at a fixed price dependant on scope and complexity.
What I do:
- Lead greenfield projects, navigate ambiguity, and translate non-technical ideas into a technical product
- Innovate solutions to hard problems with high complexity that touch on areas such as algorithms or system design
- Design robust front-end and back-end systems, such as web apps with complex interfaces, or Serverless architectures
- Implement supervised, unsupervised, or semi-supervised machine learning techniques. Including use of LLMs and associated tooling
- Debug and fix bugs in existing software, including both front-end and back-end systems
- Collaborate and work with teams on existing projects
GitHub:
https://github.com/andrewwalsh
Portfolio, projects, and contact details:
https://www.awalsh.io/projects
Fractional CTO for Startups – MVP to Maturity
I help early-stage teams avoid costly tech mistakes and scale confidently. I provide a range of services for teams at different growth stages.
I have 35 years of deep technical experience: For more information please contact me directly via https://www.theconsultantcto.com/?sid=hnf2507 or on LinkedIn: https://www.linkedin.com/in/lajosm/.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
Frontend Angular Developer and Ionic Developer Expert
20+ yoe as dev/IC. 10+ yoe in managerial and executive roles. Multiple great exits and acquisitions. I have recently built a software NGO with over half a million supporters and over a thousand active volunteers and major political and media networking. I have built tech for Tezos, Oracle, Shell, Digitas, Saatchi & Saatchi, Time Warner, Sparkasse, Bank of America.
If there's a problem related to tech, I can solve it, and build a team or company around it. Available for work as dev/IC, EM, Director, or CTO, with experience in each. Full-solution MVP development from scratch. Performance optimization and modernization of older systems. DSL and programming language design, compilers. Let me know if you're looking for experience that isn't below! HN posts are short. CV upon request.
If you think I might be able to help you, shoot me an email: damian.jobsites+hn@gmail.com
~~
Example engagement types:
- Long term dev / IC or managerial roles
- Security audits for cryptography and secure code
- Review your code and dev processes, 10-page report
- Short-term dev and research work
- One-shot meetings
(see reply for skill list)
Location: Seattle, WA, USA
Remote: Yes
Willing to relocate: No
Email: josh@standardlabs.dev
Website: https://standardlabs.dev
Resume: https://standardlabs.dev/resume
I’m a U.S.-based principal engineer with 10+ years of experience, specializing in JavaScript, React, and Next.js. I help product teams ship fast, modernize legacy frontends, and solve tough architectural problems without adding tech debt. I’m a strong written communicator — ideal for async, remote-first teams.
Highlights
- Refactored complex React apps for performance and maintainability
- Migrated production apps to Next.js for improved SSR and data handling
- Boosted Core Web Vitals and Lighthouse scores
I’m currently available for remote, part-time or short-term contract work. If your team could use a senior partner to move faster and cleaner, let’s talk.
Application Developer with over a decade of experience.
* Native application development for iOS, Android, Mac and Windows
* Creating and/or integrating APIs/SDKs
* TV/Video applications on all platforms (Apple, Android, Amazon, Roku)
Extensive experience building products and platforms from the ground up.
Email: info at squirrelpointstudios dot com
Senior Data Engineer (Ex-Google)
15+ years experience
---
Development:
- ETL: Any framework, Python, Java, Go
- ELT: Any warehouse, dbt, SQLMesh, Dataform
- Streaming: Kafka, Flink, Dataflow/Beam, Spark
- CDC/Replication: Debezium, dlt, Airbyte
- Orchestration: Airflow, Prefect, Dagster
---
Optimization:
- Performance, cost optimization
- Resource utilization, capacity planning
- Execution log, explain plan analysis
- Query rewriting, storage optimization
---
Modernization:
- Code translation: Oracle, Teradata, Hive, Informatica
- Data migration: transfer, reformatting, validation
- Automation: sqlglot, jOOQ, Calcite, OpenRewrite
---
Observability:
- Data quality: Great Expectations, Soda
- Data lineage: RCA, impact analysis
- Telemetry: logging, monitoring, alerting
---
Automation:
- Build automation: Gradle, Maven
- CI/CD: Argo, Dagger, Jenkins
- IaC: Teraform/CDKTF, Helm/CDK8s
---
Engagement model: 2-week sprints @ $15k per-sprint upfront
Free consultation: http://bit.ly/46lF7If | aj@ajwelch.dev | https://ajwelch.dev
Location: USA / India
Remote: Yes
Willing to Relocate: Yeah
Technologies: Python, Django, FastAPI, React JS, NumPy, Pandas, Polars, GeoPandas, PostgreSQL
Résumé: https://dheerajck.github.io/dheerajck/
Email: dheerajck18@gmail.com
Hi there, I’m looking to join a small but high trust team / startup where I can focus on backend development with Python and also work on the AI side aswell.
I am a Generalist.
I work in US / EU timezones right now.
I am interested in working with an early stage fast moving startup now.
Feel free to reach out via email for any questions.
Thank you!
- Vanilla JS/HTML/CSS - Flutter/Dart - Monkey C (Garmin) - Hugo/Go - PHP, SQL - Python - WordPress + Plugins - Image/audio/video editing
CV: mm-dev.rocks/mm-dev-cv.pdf
Email: In CV
I'm Mark, I've over 15 years industry experience working with startups, household names, solo entrepreneurs. I live semi off-grid in my touring caravan, currently in South Wales. I've been working on my own open source projects for a while and want to get back amongst it.
Non-code skills:
- Communication: translate ideas from inside your head into a buildable plan
- Manage expectations, understand priorities, keep you in the loop
- I'm a generalist from art/design origins
Linux/Windows/Android/MacOS/iOS.
Interested in repairability and getting the most out of cheaper, lower-powered devices.
Seeking:
- Short-term, full-time projects - Longer part-time commitments (eg 1-2 days a week, few hours a month, retainer) - Agency overspill - Open to other ideas!
LinkedIn: https://www.linkedin.com/in/ogarten
Website: https://orellgarten.com
Technologies & Skills: Software Engineering, Data Engineering, Data Modelling & Pipeline Design, Python, FastAPI, SQL, AWS, Azure, DuckDB, API design (full list on request)
Experienced Engineer looking for software / data engineering contracts to solve business problems.
I usually work on the entire data chain from data generation up to BI or ML use cases at the end. Main focus is data from your business operations (logs, sensor data, process data, ...).
More than 7 years of experience in various industries (Aviation, Automotive, AdTech, ...) where I have helped my clients successfully tackle their challenges.
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, 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,..).
Ex-Google engineer, 10+ years in software, last 2+ focused fully on GenAI. I’m looking for consulting and hands-on prototyping work—building real stuff, not just giving advice.
I help teams integrate LLMs into real-world workflows. Comfortable working across the stack (Python, React), from quick prototypes to production systems.
Past work includes agentic workflows, eval pipelines, prompt frameworks, GPT-powered tools, and full-stack AI products.
I prefer working directly with stakeholders. Big fan of startups.
LinkedIn: https://www.linkedin.com/in/andrei-puni/ Email: andrei@voxcode.ai
PERL Expert | DevOps Engineer | SQL/SOLR Specialist
Language: English, German
Areas of expertise:
Other notables experiences: WEB: https://perlexpert.de/en/Email: ja.hn4[at]mailgw.com
LinkedIn: https://linkedin.com/in/sebastianlauwers
Technologies & Skills: Backend software development, architecture, cloud architecture, VPC design, Rust, Python, Pandas, Polars, Big Data pipelines, SQL, AWS, Postgres, Airflow, REST APIs.
I have a significant amount of experience as a tech lead, team lead, VPoE, and CTO. I can easily integrate in teams, I can build teams, I can mentor juniors. I work well in both enterprise and startup environments, and anything in between.
15+ years of experience in pharma, security, database, telephony industries.
ABOUT ME Full-stack engineer with 9+ years of experience shipping production software and leading technical teams. I specialize in turning complex ideas into real-world products, especially at the intersection of emerging technology and pragmatic business needs.
My background spans startups, established products, and research. I've contributed to DARPA and NASA-affiliated research and helped launch multiple B2B/B2C/B2G products. My technical work is grounded by a business foundation (Finance B.S.) and strong product intuition.
I’m currently looking for freelance or contract roles where I can:
- Build MVPs or iterate on high-growth products
- Lead architecture and implementation from 0→1
- Join agile teams pushing the frontier in AI, biotech, data, or web3
- Consult on strategy + technical execution for emerging tech businesses
RECENT FOCUS
- LLM applications (chatbots, agent workflows, embeddings, prompt engineering)
- Blockchain tooling (Ethereum, Foundry, Viem, building protocols)
- Custom data dashboards & visualizations (GraphQL, D3, SQL)
- Real-time systems, graph databases, and event-driven architectures, general "big data" stuff
- Security-conscious engineering: OSINT, encryption, privacy tools
KEY SKILLS React, Next.js, Vue, TypeScript, Python, Java, GraphQL, Node, SQL, Linux, Rust (learning), Solidity, Viem, Foundry, Cryptography, Prompt engineering
CONTACT GitHub: github.com/wkyleg Email: wkyleg_eth [at] pm [dot] me ENS: wkyleg CV & LinkedIn: available upon request
Hi! I'm Matt. I solve team problems: individual issues, teamwork, cross-functional collaboration, delivery, workflows.
Looking for fractional / consulting / coaching work helping managers (directors, etc) or high-performing ICs.
I've delivered disproportionate value in helping solve issues with quality, delivery, collaboration, attrition, and org design.
I've also helped managers/leaders upgrade their systems and behaviors to get much better results out of their team with a lot less work.
We are a small remote full-stack design and dev team specializing in healthcare apps. Our portfolio: https://vitalsphere.digital. Some recent projects we've worked on: https://pathways.org/mobile-app, https://axiosint.com/digitalsolutions, https://popset.xyz, https://www.signupmedia.com, https://emulatebio.com, https://conveyour.com, https://www.webvideocaster.com, https://ways2well.com.
Some of the technologies we're most familiar with: Web and mobile design, UI, UX, iconography, illustration, design prototyping, PHP, Node.js, Meteor, Python, Ruby, JavaScript, HTML, CSS, Sass, LESS, Stylus, CoffeeScript, WebSockets, AJAX, MongoDB, Redis, MySQL, Cordova, PhoneGap, React Native, iOS, Android, Browser extensions (Chrome, Firefox, Safari), AWS, WordPress, Joomla, Drupal, C, C++, C#, Java, Objective-C, Swift, pharmacy systems such as QS/1, HL7, HIPAA, Smart Contracts, Motoko, Web3.
We offer hourly rates and discounted monthly retainer options. Contact: via our website or you can contact me directly at eliyah@vitalsphere.digital.
Portfolio: https://angeliqueboudeau.org/#portfolio
Contact: hi@angeliqueboudeau.org
I’m a web & print designer who helps organisations involved in social and environmental causes. I’ve helped clients in the past with projects focused on thermal solar energy, household waste reduction, plant-based food advocacy and data science for social/environmental issues. My design process aims to understand your needs and challenges and create designs aligned with your goals and values.
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Design services:
· Web design: responsive mobile/desktop designs that are lightweight and fast, where I can also arrange web development
· UI design: wireframes, mockups, clickable prototypes
· Print design: posters, flyers and business cards, with prints optimised for reduced ink and material usage
· Branding: logo design, style guides, posters, booklets, slideshows and social media banners
· Included in all services: advice on sustainability, accessibility (WCAG), content/copy, and SEO
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Skills: Figma, FigJam, Canva, Inkscape, GIMP, Scribus. Basics of Git, HTML, CSS, Linux, Visual Studio Code, Hugo, static websites. Fluent in French and English.
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Contact me via https://angeliqueboudeau.org or hi@angeliqueboudeau.org with a short description of your project, and how you think I can help, then we can arrange a call to discuss next steps!
Portfolio: https://seanw.org/
Live example projects: https://checkbot.io/ https://inclusivecolors.com/
Location: Edinburgh, UK and remote (I’m used to time zone differences and async work)
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I help startups with the UX/UI and web design of their products. This includes web apps, websites, landing pages, copywriting, and I can assist with frontend development where needed. My background of launching my own products and being a full stack developer helps me create practical designs that balance usability, aesthetics, development effort, and performance. I work to fixed price quotes for self-contained projects.
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The best live example of my work is Checkbot (https://checkbot.io/), a browser extension that tests websites for SEO/speed/security problems. The entire project is my own work including coding the extension itself, UX/UI design, website design (the homepage is optimised to load in 0.7 seconds, 0.3MB data transferred), marketing, website copy, and website articles on web best practices.
[ Rated 4.9/5, 80K+ active users, 100s of paying subscribers ]
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I have 10+ years of experience, including a PhD in software verification and 5+ years working for myself helping over 25 companies including Just Eat, Triumph Motorcycles and Fogbender (YC W22). See my website for testimonials, portfolio and more: https://seanw.org
Skills: Figma, Sketch, TypeScript, JavaScript, Vue, Hugo, Jekyll, WordPress, Django, HTML/CSS, Bootstrap, Tailwind, OCaml, Java, Python, C, analytics, WCAG accessibility, website SEO/speed optimisation.
Note: For large projects, my partner usually assists me in the background (I’m working on starting a design studio with her in the future)
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Email sw@seanw.org with a short description of 1) your project 2) how you think I can help 3) the business outcome you’re looking for and 4) any deadlines. I can get back to you in one working day to arrange a call to discuss a quote and how we can work together!
My latest projects have been in full-stack Edge R&D for SLaM, memory controller firmware dev for POWER servers, and chip bringup/testing for Z mainframes.
I'm passionate about modular synthesis and tinkering with all sorts of analog circuits and DSP. Currently upskilling in analog PCB design and refining my abilities in FPGA development.
Services I offer: custom firmware implementation, hardware/software integration, full-stack edge AI architecture.
Feel free to reach out directly at dm@datameta.info