React Native

• ​CallStack - React Native community-trusted, extremely skilled Javascript developers.

• ​Galois - Develops technology to guarantee the trustworthiness of systems where failure is unacceptable. (GitHub)

• ​Akveo - Delivering Web & Mobile Solutions.

• ​Spaceship Studio - Web & mobile development, strategy, and training.

React

• ​Formidable - JavaScript consultancy built for the modern web.

• ​Component Driven​

Rust

• ​Asquera - Specialise on the things below the covers: databases, queues, caches, APIs and the tiny details that make them all work together.

• ​Lyken Software Solutions (GitHub)

Data Science

• ​Quansight​

• ​QuantumBlack - Use data, analytics and design to help our clients be the best they can be.

• ​Data Revenue - Custom machine learning solutions for real-life problems.

iOS

• ​Oak Snow Consulting - Based in Vermont, builds iOS and Web apps for early stage startups and small businesses.

• ​Exyte - Mobile, Blockchain, AR/VR development services.

• ​M Cubed Software​

• ​Breakpoint Studio - Mobile Strategy, Design, Development.

• ​Elegant Chaos - Mac and iOS software development, consultancy, debugging, and contracting.

• ​Nice Photon - Make iOS apps. (GitHub)

Node

• ​Custom Node.js Module Development​

Design

• ​Supercreative​

• ​Filament Group - Design and front-end development studio.

• ​MOXY - Interdisciplinary studio, we specialise in designing and developing.

• ​wirefr.am - Tiny studio, focusing on beautifully crafted visual design.

• ​kadjax - Create Designs & Illustrations for digital products.

• ​Green Chameleon - Bristol based Design Agency.

• ​Tubik Studio - Digital agency creating mobile and web products.

• ​Red Collar digital agency​

• ​Dialectic Design​

• ​Unfold - Create delightful experiences for brands. (Dribble)

• ​Clay - UI/UX Design Agency, Web Design & Branding. (Dribble)

• ​makemepulse​

• ​Milkinside​

• ​Awkward - Digital product agency.

• ​Human Deluxe Design Studio​

• ​This Too Shall Grow​

• ​Wiredcraft - Creates & grows digital products for the world’s best brands.

• ​Z1 - Digital Product Studio.

• ​No Service 24/7 - Brand Agency.

• ​Unlikely Objects - Storytelling studio.

• ​FAVO Studio - Motion Design, Animation & Video.

• ​Websmyth - Custom Websites For Small Businesses.

• ​PHYGITALISM - Moscow based design studio.

• ​Sensa - Strategy + Craft.

• ​BASIC - Digital Branding & Experience Design Agency.

• ​Rejiggle - Conversion-Focused Design.

• ​Hactar - Product and service design for social good.

• ​Heartbeat Agency - UI/UX for mobile and web apps in fintech.

• ​Simple Thread - Digital Product Agency.

• ​Charmer - Дизайн-студия.

• ​Utsubo - Technology-first creative studio. (Twitter)

DB

• ​OnGres - Expert postgres help for startups and enterprise.

Scala

• ​Propensive - European technology company, specializing in supporting the Scala programming community.

Clojure

• ​JUXT (GitHub)

Elixir

• ​Dasshbit - Help startups and enterprises adopt and run Elixir in production.

• ​Moose Code - Elixir Consulting.

Haskell

• ​Kowainik​

Kotlin

• ​Touchlab​

NixOS

• ​NumTide - Bringing the power of Nix to companies since 2016. (GitHub)

Elm

• ​Incremental Elm Consulting​

ML

• ​Principia Labs (GitHub)

Embedded

• ​Vertigo Designs​

Other

• ​Monadfix - Work with Haskell, PureScript, and Agda.

• ​feenk - Reshape the Development eXperience to make your systems explainable.

• ​Keming Labs - Build data-driven interfaces.

• ​Obsidian Systems - Software consultancy specializing in haskell, nix, curiosity, and innovation.

• ​Oxidizing Systems - Provide consulting services based on our experience in functional programming and safe systems.

• ​Reify Works - Help companies market and sell more software.

• ​YLD​

• ​PerfPerfPerf - Web performance consultancy. (Code)

• ​RedMadRobot - Full cycle product development. (GitHub)

• ​Parallax - Digital agency.

• ​Exyte - Mobile, Blockchain, and AR/VR Development Agency.

• ​The Yak Collective - Network of over 300 independent consultants, coaches, and freelancers with varied technical and creative skills.

• ​Cunningham & Cunningham - Small consultancy that has specialized in object-oriented programming.

• ​Codista - Professional Web Development in Vienna.

• ​Postlight - Digital Product Studio.

• ​Mirumee - High performance Python, React & React Native applications.

• ​Clearleft - Strategic Design & Innovation Consultancy.

• ​Software Mansion​

• ​Narative - Helps you brand, build and grow.

• ​black.af - Software consulting agency aiming to provide you with industry experience, forward thinking solutions and self-driven tools.

• ​Futurice - Digital Engineering and Innovation.

• ​Little Miss Robot - Digital Product Design Agency.

• ​Itty Bitty Apps - Dedicated to native mobile apps.

• ​Troodon Software​

• ​Lickability - Software studio in NYC that builds apps.

• ​Skcript​

• ​Autogram - Content management and design systems experts.

• ​Echobind​

• ​This Dot Labs​

• ​Uberdosis - Digital product agency, building own products & working for clients.

• ​Littlelines - Ruby on Rails Development Company.

• ​Atomic Object​

• ​Bitfield Consulting - Cloud native & Go consultancy.

• ​Apptension​

• ​Abstract Machines - Short contracts, code reviews, and coaching in the fields of web, data, and knowledge engineering.

• ​Futured - Mobile business builders.

• ​Metosin (GitHub)

• ​Elements - Specialist for Digital Design & Development.

• ​HYPE4 - Web and mobile / design and development.

• ​FP Complete - Specialize in building Reliable, Repeatable, Scalable and Highly Secure Software.

• ​gskinner (GitHub)

• ​47 Degrees - Engineering the Future of Enterprise.

• ​Moritz Systems - Code Security, Embedded Solutions, IOT and Edge Computing.

• ​LateCheckout - Communities design firm.

• ​Underjord - Artisanal software development, quality productions and some teaching.

• ​Strumenta​

• ​RokkinCat​

• ​The Agile Monkeys - Team of full-stack senior software engineers.

• ​QuarkWorks​

• ​Jayway​

• ​Bad Idea Factory​

• ​Shakacode - Ruby on Rails, React, Gatsby and Reason development.

• ​Nodes Agency - Digital product development agency.

• ​Technokrat​

• ​Dwarves Foundation (GitHub)

• ​Beautiful Interactions - Tailored digital solutions, made beautifully.

• ​Jantcu - Web design & tech consulting. (GitHub)

• ​Mwie Ltd​

• ​STRV - Software Design & Engineering.

• ​Typeable - Haskell, FP, software development and consulting. (GitHub)

• ​wearereasonablepeople (GitHub)

• ​Lucina & Associates - Small consulting group specializing in bespoke software development and system integration.

• ​EGO Creative Innovations - Develop Mobile Apps for Businesses.

• ​Scott Logic​

• ​wemake.services (GitHub)

• ​Foxhound Systems​

• ​Jam3 Developers (GitHub)

• ​TechAscent (GitHub)

• ​Together - Multidisciplinary creative & technology agency, spanning brand, communication, development and strategy.

• ​SecretKeys - Privacy Tech & Consulting. (GitHub)

• ​ustwo - Digital product studio.

• ​Provectus - AI-First Consultancy and Solutions Provider.

• ​8th Light​

• ​Trail of Bits (GitHub)

• ​Test Double - Agency Improving the World's Software.

• ​Bocoup - Web platform consulting services.

• ​OddBird - Experts in digital product creation. (GitHub)

• ​NearForm - Enterprise Software Development & Capability Building.

• ​Public Digital​

• ​Fueled - Mobile App Development & Digital Transformation Company.

• ​Imaginary Cloud - Software Development & UI/UX Design.

• ​TypeFox​

• ​Good Work​

• ​SoftwareMill - Scala, Java, Blockchain, Big Data, Machine Learning.

• ​ColorElephant​

• ​Morflax - Easiest online 3D design platform.

• ​Surf - Разработка мобильных приложений для Android и iOS.sm (GitHub)

• ​True web artisans​

• ​Trilon​

Notes

• ​The "expert path" is valid. Become an expert in something and learn to sell that expertise. The reward? No upper limit on your rates.​

• ​Set expectations (in the contracts) with clients about response time on emails and scheduling calls for non-emergencies.​

• ​5 Steps to break into high $ consulting as a developer: 1. Specialize in something. 2. Document everything as you learn - videos, blogs, OSS on Git. 3. Update social presence reflecting specialty. 4. Create website with good SEO as lead funnel. 5. Link everything you do to the site​

Links

• ​How to Find Consulting Clients (2019) (HN)

• ​SaaS & Subscription Experts - Best consultants, agencies, and specialized services to help you grow.

• ​Ask HN: What mistakes did you make when starting as a consultant/freelancer? (2019)​

• ​Hourly Billing Is OK (2018)​

• ​Lessons from Six Years as a Solo Consultant (2019) (HN)

• ​Client - Simplified requirement collection for freelancers and agencies. Say goodbye to boring contact forms, emails and unproductive first calls.

• ​Clutch - B2B Ratings & Reviews.

• ​Software Consulting Legal Documents (Code)

• ​Software Consulting: What This Really Means and How to Start (2020)​

• ​Becoming A Consultant In 2020: A How-To Guide (2020)​

• ​Ask HN: How do custom software dev firms make money? (2020)​

• ​The Consultant Out of Time (2021)​

• ​Ask HN: Charge per hour or per project? (2021)​

• ​Ask HN: How did you transition from FTE to self-employed/sole proprietor? (2021)​

• ​Consulting 101 Advice (2021)​

• ​How to Get Clients to Pay Their Invoices​

• ​The Prosperous Software Consultant (2018) (HN)

• ​wellpaid.io - Recruiter-free contractor marketplace.

• ​On Deck Freelancers​

• ​Ask HN: What is the highest consulting rate that you have come across, in tech? (2021)​