Hire expert
F# Developers
for any job

Millions of people use Freelancer to turn their ideas into reality.

Hire a top F# Developer now

Trusted by leading brands and startups

Freelancers are ready — get bids in seconds

Post your project for free and connect with skilled freelancers ready to start today. Compare bids, ratings and portfolios, and only pay when you're happy with the work.

Live across Freelancer right now

~320 sec

to first bid

53+

bids per project

6k+

freelancers online

Not sure who to pick? Every freelancer comes with ratings, reviews and a portfolio you can compare before you hire.

Post your project — it's free

No upfront cost · pay only when you're happy with the work

Hire F# Developers

Narola Infotech

4.7

2156

10.0

97%

Surat, India

$15 USD per hour

⭐ Top 1% on Freelancer.com | Narola Infotech - Digitalising Businesses Since 2005 ✎ About Us We are Narola Infotech, a globally recognized IT solutions company with 20+ years of experience delivering high-performance web, mobile, and enterprise software solutions to 1500+ happy clients across 50+ countries. Trusted by Fortune companies like CGI, L&T, Infosys, Biocon, and TVSNext. We don't just build software, we build lasting partnerships. Our approach is simple: understand your vision, deliver beyond expectations, and stay with you every step of the way. ✎ Why Choose Us? ➬ 20+ Years of Industry Experience ➬ 350+ Talented IT Professionals ➬ 3000+ Successfully Delivered Projects ➬ 95% Client Retention Ratio ➬ 4.9 ⭐ Clutch Rating ➬ 100% Project Success Ratio ➬ Clutch Top 1000 Companies Global 2022 ➬ Best Outsourcing Company - SGCCI ✎ Our Services ➬ Custom Web & Mobile App Development ➬ Custom Enterprise Software Development ➬ AI/ML & Data Analytics Solutions ➬ QA & Software Testing (Automation, Security, Performance) ➬ DevOps, Cloud Migration & Managed Services ➬ Salesforce Consulting, Implementation & Support ➬ Staff Augmentation - Dedicated Teams or Individual Developers ➬ Support & Maintenance ✎ Tech Stack ➬ Frontend: ReactJS, AngularJS, VueJS, NextJS, NuxtJS ➬ Backend: Node.js, Java, PHP, Laravel, .NET, Python, Django, WordPress ➬ Mobile: Flutter, React Native, iOS (Swift), Android (Java/Kotlin) ➬ Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Terraform ➬ Database: MySQL, MongoDB, PostgreSQL, Firebase, MS-SQL ➬ Other: Salesforce, MS Dynamics 365, Power Platform, Big Data, AI/ML, Automation ✎ Industries We Serve ● Fintech ● Healthcare ● Retail & Ecommerce ● Education ● Real Estate ● Media & Entertainment ●Transport & Logistics ✎ Our Strengths ➬ Agile Development Methodology ➬ Daily & Weekly Progress Reports ➬ Clear Communication & Collaboration ➬ 100% Plagiarism-Free & Secure Delivery ➬ Guaranteed Data Privacy & NDA Protection ➬ Flexible Engagement Models: ● Fixed Cost ● Time & Material (Hourly) ● Dedicated Team ● Hybrid Model (Fixed + Hourly) ✎ Our Promise "You will get the value of every penny you spend. We are committed to driving your business forward with reliable, quality solutions powered by technology and innovation." - Ashish Narola, CEO

F# PHP ASP Java JSP

View Profile

Anirudha T.

4.9

339

7.6

95%

Nagpur, India

$50 USD per hour

I build clean, functional solutions fast across the full stack. Specializing in: - Web: React, Next.js, Node.js, Python, PHP, Ruby on Rails, Golang, Laravel, Django, WordPress, Vue.js - Mobile: React Native, Flutter, Android (Kotlin), iOS (Swift), Dart - AI & Machine Learning: LLM integrations (Claude, OpenAI, Gemini), RAG pipelines, LangChain, vector databases, prompt engineering, chatbots, NLP, OCR, generative AI - APIs & Integrations: REST, GraphQL, payment gateways (Stripe, PayPal, Razorpay), Twilio, SendGrid, third-party services - Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Nginx, Linux server administration, Cloudflare - E-commerce & CRM: WooCommerce, OpenCart, Magento, Odoo, Prestashop, Point of Sale systems - Databases: MySQL, PostgreSQL, MongoDB, MariaDB, Elasticsearch, SQLite, Redis, Microsoft SQL Server - Trading & Finance: MetaTrader 4/5, MQL4/5, Pine Script, NinjaTrader, OpenClaw, backtesting, trading bots - Data & Automation: Excel/Google Sheets automation, dashboards, data analysis, workflow automation I focus on understanding your requirements clearly, delivering working code, and communicating progress throughout.

F# PHP Perl C Programming Java

View Profile

Richard R.

5.0

5.8

100%

arlington, United States

$50 USD per hour

With over 13 years of experience, I specialize in building innovative, high-performance digital solutions across diverse domains such as, - Mobile App Development: Skilled in delivering world-class mobile applications, utilizing hybrid frameworks (React Native, Flutter) and native technologies (Kotlin, Java, Swift, SwiftUI, Xojo) to create intuitive, high-quality user experiences. - Blockchain & Web3 Development: Experienced in designing and deploying decentralized applications and smart contracts, leveraging Web3 technologies to ensure scalability, security, and real-world usability. - Web Development: Proficient in developing robust, responsive web applications with elegant interfaces and efficient backend architectures that maximize performance and reliability. - Game Development: Adept at building immersive, interactive games using Unity3D, Unreal Engine, and HTML5, combining technical expertise with creative vision. - Application Security: Skilled in implementing strong security practices to safeguard applications, ensuring data integrity, compliance, and resilience against evolving threats. - Highly experienced in delivering customized websites on WooCommerce, Shopify, WordPress.

F# PHP C Programming Python Website Design

View Profile

Hugo Eduardo G.

5.0

2.4

100%

Zamora, Mexico

$20 USD per hour

I am a senior software developer with strong experience in blockchain, full-stack web development, AI systems, game development, PowerPoint automation, and desktop application development. I help clients turn ideas into real products — from MVPs and prototypes to production-ready platforms. I can build secure and scalable web apps, AI-powered tools, smart contract systems, crypto platforms, automation systems, dashboards, mobile/game applications, desktop software, and PowerPoint-based automation or presentation solutions. My main strengths include: ⭐️ Blockchain Development Smart contracts, Web3 integration, crypto wallets, NFT platforms, DeFi features, token systems, dApps, and secure blockchain architecture. ⭐️ Full-Stack Development React, Next.js, Node.js, Python, FastAPI, Django, Laravel, PHP, ASP.NET, PostgreSQL, MySQL, MongoDB, REST APIs, dashboards, admin panels, SaaS platforms, and cloud deployment. ⭐️ Desktop App Development C#, .NET, Windows desktop applications, WinForms, WPF, ASP.NET-based systems, business software, automation tools, data processing apps, reporting systems, API integrations, and installer/deployment support. ⭐️ PowerPoint Development PowerPoint automation, VBA macros, custom presentation tools, add-ins, template systems, automated report generation, data-driven slides, and professional presentation workflow solutions. ⭐️ Mobile App Development iOS and Android apps, Flutter, React Native, Swift, Kotlin, mobile UI/UX, API integration, push notifications, in-app purchases, subscriptions, app performance optimization, and App Store / Google Play submission. ⭐️ AI Engineering ChatGPT/OpenAI API, Claude API, AI agents, automation workflows, NLP, document processing, chatbot systems, WhatsApp/Telegram AI bots, RAG systems, and custom AI assistants. ⭐️ Game Development Unity, C#, mobile games, casual games, slot/spin/dice/card/scratch-style games, 2D/3D prototypes, gameplay logic, UI, ads/SDK integration, and App Store/Google Play submission support. I focus on clean code, practical architecture, fast communication, and reliable delivery. I do not just “write code”; I think through the product, user flow, edge cases, and business goal behind the project. I am comfortable taking ownership of the full process: planning, development, testing, deployment, and long-term support. Typical projects I can handle: Mobile apps for iOS and Android AI chatbot and automation systems Web3 / blockchain platforms SaaS dashboards and admin systems Crypto wallet or token-based applications Full-stack MVP development API integrations and backend systems Unity game prototypes and mobile game apps Desktop apps with C# and .NET ASP.NET business platforms PowerPoint automation and presentation tools AI + Web + Mobile combined products

F# PHP C Programming Java JSP

View Profile

Alessandro P.

5.0

2.4

100%

Quartu Sant\'Elena, Italy

$25 USD per hour

I am an accomplished game developer with a strong focus on gameplay engineering, AI development, shader programming, and AR/VR applications. My extensive experience in Unity and C# has allowed me to contribute to diverse gaming projects, such as Alaloth: Champions of the Four Kingdoms, Apocalypse Rangers, and Hell for One. Adept at collaborating with teams and managing tasks efficiently, I consistently deliver captivating gaming experiences. With a commitment to learning new technologies and a passion for gaming, I am well-equipped to excel in the game development industry. Portfolio: https://alessandropuddu.github.io/

F# C Programming Java Game Design C# Programming

View Profile

Eugen N.

5.0

1.8

100%

Berlin, Germany

$80 USD per hour

Experienced developer and DevOps engineer. New to freelancer.com, looking for opportunities to strengthen my profile. - Ruby on Rails expert - Apache Spark with Python & Scala experience - RHCE, RHCSA, RHCS in OpenShift & Configuration Management - AWS Certified, Databricks Certified (Apache Spark), Linux Foundation Certified (CKAD)

F# Java Python Linux Ruby on Rails

View Profile

See more F# Developers

Clients rate our F# Developers

5 out of 5

from 2,506 reviews

How to hire a great freelance F# Developer

An F# developer is a software engineer who builds applications using F#, a functional-first programming language on the .NET platform used for data-heavy, financial, and concurrent systems. Hiring a skilled F# developer gives your business access to concise, type-safe code that reduces bugs and accelerates delivery on complex domains where correctness matters.

What an F# developer delivers

F# developers write production software that runs on .NET, combining functional programming principles with object-oriented and imperative styles where they fit. The language is built for problems where data transformation, parallelism, and domain modeling dominate — making it a strong choice for finance, analytics, scientific computing, and backend services.

A freelance F# programmer typically delivers backend APIs, data pipelines, quantitative models, web applications, scripts, and shared libraries. They also bring practices like discriminated unions, pattern matching, immutability by default, and computation expressions, which lead to code that is shorter, clearer, and easier to maintain than equivalent C# implementations.

Common services and deliverables

F# freelancers cover a wide range of engineering work across the .NET ecosystem. Typical deliverables include:

Backend services and REST APIs built with ASP.NET Core, Giraffe, Saturn, or Suave

Domain modeling using discriminated unions and records to encode business rules at the type level

Data processing pipelines, ETL jobs, and analytics workloads using Deedle, FsLab, and the .NET data stack

Quantitative finance and actuarial models, pricing engines, risk calculators, and trading utilities

Machine learning prototypes and scoring services using ML.NET and the F# type providers

Web frontends compiled to JavaScript with Fable and the Elmish architecture

Cloud-native services on Azure or AWS, including Azure Functions written in F#

Migration of legacy C# or VB.NET code to functional F# equivalents

Unit and property-based tests with Expecto, xUnit, FsCheck, and Hedgehog

Build, packaging, and CI configuration with Paket, FAKE, and dotnet CLI workflows

Tools, frameworks, and ecosystem

An experienced F# developer is fluent in the broader .NET toolchain, not just the language itself. Expect strong working knowledge of the dotnet SDK, NuGet, and modern editor support through Visual Studio, JetBrains Rider, or Visual Studio Code with the Ionide extension.

On the framework side, common stacks include ASP.NET Core for HTTP services, Giraffe and Saturn for functional web routing, Fable for transpiling F# to JavaScript, and the SAFE Stack for full-stack F# applications. For data work, Deedle handles dataframes, FSharp.Data and SQL type providers handle external data sources, and ML.NET supports machine learning. Testing usually centers on Expecto or xUnit paired with FsCheck for property-based testing.

Industries that hire F# developers

F# is especially popular in domains where precise modeling and reliable concurrency pay off. The most common industries hiring F# specialists include:

Investment banks, hedge funds, and trading firms building pricing, risk, and analytics tools

Insurance and actuarial firms modeling policies, claims, and reserves

Healthcare and life sciences companies processing clinical or genomic data

Energy and utilities running forecasting and optimization workloads

SaaS companies building backend microservices on the .NET platform

Research groups and consultancies needing rapid prototyping with strong type safety

How to evaluate F# developer candidates

Strong F# candidates show depth in functional programming concepts and fluency in the .NET runtime. Look for portfolios that include real production code, open-source contributions to F# libraries, or technical writing on functional design. Public GitHub repositories using FAKE, Paket, or Fable are strong signals, as is experience integrating F# with existing C# codebases.

Key qualifications and experience signals include:

Demonstrable production F# experience, not just hobby projects

Comfort with .NET fundamentals — async, tasks, the CLR, and interop with C#

Experience with at least one F# web framework and one data or testing library

Understanding of immutability, algebraic data types, and railway-oriented error handling

Familiarity with cloud deployment on Azure or AWS and CI/CD pipelines

Sample interview questions you can use directly:

How do you model a domain with discriminated unions, and when would you reach for a class instead of a record?

Can you walk me through how you would structure a Giraffe or Saturn web service with dependency injection?

How do you handle interop when your F# project needs to consume or expose APIs to a C# codebase?

What is your approach to error handling — exceptions, Result types, or something else — and why?

How would you use FsCheck or Hedgehog to write property-based tests for a pricing function?

Why hire F# developers on Freelancer.com

F# is a specialized language, and the talent pool is smaller than for mainstream stacks. Freelancer.com gives you access to a global community of vetted F# developers, .NET engineers, and functional programming specialists across every time zone, so you can match a candidate to your domain — finance, data engineering, web, or cloud — quickly. Clients set their own budgets and receive competitive bids from freelancers on Freelancer.com, with profiles showing ratings, completed project counts, written reviews, and verified payment methods. Milestone Payments protect your funds until agreed work is delivered, making it safe to hire on Freelancer.com for both short scripts and long-term engineering engagements.

Post a project on Freelancer.com today and connect with skilled F# developers ready to build, migrate, and maintain your .NET applications.

What are the steps to hiring a freelance F# developer?

Hiring an F# developer is straightforward when your brief reflects the technical realities of the work — the .NET version, target framework, libraries, and integration points all shape who is qualified to bid. The three steps below walk through writing the project post, reading proposals critically, and choosing the right freelancer for your codebase.

Step 1: Post your project on Freelancer.com

The project post is the single biggest determinant of bid quality. A clear, technical brief filters out generalists and attracts F# developers whose experience genuinely matches your domain — whether that is a Giraffe API, a Fable frontend, or an ML.NET scoring service. Head to the post project page , where you fill in the brief, scope, timeline, and budget before publishing the project for freelancers to bid on.

Specify the .NET version and target framework (.NET 8, .NET Framework 4.8, .NET Standard 2.0, etc.)

Name the libraries and frameworks involved — Giraffe, Saturn, SAFE Stack, Fable, Deedle, ML.NET, FsCheck

Describe the deliverable format: NuGet package, Docker image, deployable Azure Function, source repository, or migration patch

State integration points such as existing C# projects, SQL or NoSQL databases, message queues, or third-party APIs

Include the industry context (financial modeling, data engineering, healthcare analytics) so candidates can show relevant work

Set a timeline and indicate whether you prefer a fixed-price or hourly engagement

Step 2: Review bids from freelancers

Bids are short proposals, not just price quotes. A strong F# developer will reference specifics from your brief, ask clarifying questions about runtime targets or library choices, and outline a realistic plan. Read each proposal as evidence of how the freelancer will approach your codebase.

Look for references to the exact frameworks you mentioned — Giraffe, Saturn, Fable, ML.NET — and how the candidate has used them before

Check whether the bid raises sensible questions about async patterns, error handling, or interop with existing C# code

Assess whether the proposed timeline is realistic given the scope and complexity

Note whether sample F# repositories, NuGet packages, or open-source contributions are linked

Use Freelancer.com's chat to ask shortlisted candidates a short technical question, such as how they would structure a domain module, before committing

Step 3: Evaluate freelancers and award the project

The final decision combines proposal quality with the evidence on each freelancer's profile. For an F# hire, weigh consistency across multiple .NET projects rather than a single impressive sample, and confirm the candidate has shipped F# in production rather than only written it for fun.

Review portfolio depth: production F# work, open-source contributions, technical articles, and any C#-to-F# migrations

Check star ratings and the volume of completed projects, especially within .NET, backend, or data engineering categories

Read written client reviews for signals on code quality, communication, and on-time delivery

Confirm verified payment method, completion rate, and on-time delivery rate on the profile

Award the project to your chosen freelancer and set up Milestone Payments so funds are released only as agreed deliverables — repository commits, passing tests, deployed services — are completed

What is the difference between an F# developer and a C# developer?

Both work on the .NET platform and can interoperate freely, but F# is functional-first while C# is object-oriented-first. F# developers tend to favor immutability, pattern matching, and concise domain modeling, which is why F# is often chosen for finance, data, and complex business logic where correctness is critical.

Can I hire an F# freelancer for a one-off project?

Yes. F# developers on Freelancer.com take on short engagements such as building a single microservice, writing a data pipeline, prototyping a model, or migrating a specific module from C# to F#. You can scope the work as a fixed-price project or hourly engagement depending on how well-defined the brief is.

How long does an F# project usually take?

Timelines depend entirely on scope. A small script or proof of concept can be delivered in a few days, a domain-modeling exercise or REST API in two to four weeks, and a full SAFE Stack application or trading system over several months. Asking candidates for a phased estimate during bidding gives you a realistic picture.

Do I need an F# developer or a general .NET developer?

If your codebase is already in F# or you specifically want functional-first design, hire an F# specialist. If the work is mostly C# with occasional F# components, a senior .NET engineer comfortable in both languages is often the better fit. Mention your existing stack in the brief so candidates can self-select.

Can F# developers work with frontends and mobile apps?

Yes. Through Fable and the Elmish architecture, F# developers can compile to JavaScript and build React-style web frontends. With .NET MAUI and Xamarin interop, F# code can also power shared logic in cross-platform mobile apps, though most mobile UI work still happens in C# or native frameworks.