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Post your project for free and connect with skilled Bluetooth Low Energy Developers ready to start today. Compare bids, ratings and portfolios, and only pay when you're happy with the work.
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10,0
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Surat, India
$15 USD pr. time
9,8
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Rajkot, India
$15 USD pr. time
10,0
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Lahore, Pakistan
$40 USD pr. time
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Jaipur, India
$10 USD pr. time
9,2
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Looking to hire a Bluetooth Low Energy Developer? These are top-rated Bluetooth Low Energy (BLE) projects recently completed on Freelancer, chosen from verified client reviews of 4.5 stars and above, and refreshed monthly.
PROJEKTET
A BLE connection-drop bug in an Android app was diagnosed and fixed within the stock Android BLE API, with the root cause fully documented in commented code and unit tests. A returning client noted the professional quality and on-time, on-budget delivery.
KLIENT-ANMELDELSE
This is the second project I've hired RyanP for in the last two weeks. His work is exceptional. The code is very professional and fully commented. He even added extra comments to describe the source of the problem and how he fixed it. The major new code included all necessary unit tests too. Given the results from my past work with Ryan, I hired him privately for this project, without putting it out to bid. As always, his bid is reasonable (exactly what I would have expected) and his projects have all been delivered well within his quoted time. He's never tried to upcharge me after accepting his bid, like many other developers seem to do and I really hate. He's as good as his word and knows a ton.
C Programming · Mobile App Development · Android
PROJEKTET
A BLE HID report descriptor fault was traced and fixed in a Kotlin Android gamepad emulator, making every button and axis register correctly in Windows 11's joy.cpl within one day. The freelancer also caught and resolved an unrelated bug at no extra charge, earning a 5.0 rating.
KLIENT-ANMELDELSE
I have worked with quite a few developers on Freelancer of the years and Ryan is the best I have found. His expertise was amazing. The code was clean and well commented/documented. He found and fixed my issue in one day, after I had spent a week working on it. He even found a bug in my code in an unrelated area and provided a fix at no charge. The project was delivered before it was due and within budget. No attempts at up-charging, like some developers have been doing recently.
Windows Desktop · Mobile App Development · Android
PROJEKTET
A BLE iOS prototype was built enabling two iPhones to exchange text messages peer-to-peer without Wi-Fi, accounts, or pairing prompts. The work was completed by a Preferred Freelancer with a 100% completion rate across 15 reviews.
KLIENT-ANMELDELSE
They accommodate and accomplish the task.
Mobile App Development · iPhone · Android
PROJEKTET
Designed and built a BLE-enabled trailer-door security prototype combining magnetic and vibration sensors with firmware, cloud backend, and a cross-platform Flutter or React Native app for real-time alerts. The client confirmed strong technical execution across hardware and software on this IoT milestone.
KLIENT-ANMELDELSE
Sheroz and his team did an excellent job completing the Freight Shield camera phase. They communicated professionally throughout the project, responded to questions and feedback, and kept the work moving forward. I reviewed the demonstration videos and was pleased to see the camera system functioning as intended. The team showed strong technical ability, commitment, and a willingness to work through the requirements of a unique hardware and software project. I appreciate their effort, patience, and dedication to the Freight Shield vision. I would recommend Sheroz and his team to anyone looking for a reliable development team for IoT, hardware integration, mobile applications, camera systems, or other complex technology projects. Thank you, Sheroz and team, for your hard work and for successfully completing this important project milestone.
Electronics · Mobile App Development · iPhone
PROJEKTET
BLE firmware on an ESP32 was optimized to batch multiple sensor readings into single packets, with transmission intervals tied to negotiated connection parameters. A Preferred Freelancer with a 5.0 rating across 87 reviews completed the work.
KLIENT-ANMELDELSE
Amazing freelancer, really knows what he is doing. Highly recommend him to anyone. Will work with him again in the future.
Electronics · Microcontroller · Electrical Engineering
A Bluetooth Low Energy developer is an embedded software engineer who designs, codes, and tests BLE firmware and apps that allow devices to communicate wirelessly with minimal power consumption. Hiring a skilled Bluetooth Low Energy developer means securing the engineering talent needed to build connected products, from wearables and medical devices to smart home sensors and industrial trackers, on the BLE protocol stack.
A BLE developer writes firmware for microcontrollers, implements GATT services and characteristics, and builds the mobile or desktop applications that pair with the device. Their work covers the full communication chain: peripheral firmware on the chip, the central app on iOS or Android, and the security layers that protect data in transit.
Commercially, this role is what turns a hardware idea into a shippable product. Without a competent Bluetooth Low Energy engineer, prototypes stall at integration, battery life suffers, and pairing reliability collapses in real-world conditions. A strong BLE specialist delivers stable connections, predictable power draw, and clean APIs that downstream teams can build against.
Project scope varies by product stage, but most engagements include some combination of the following deliverables from a freelance BLE developer:
Buyers should expect freelance BLE engineers to be fluent in the SDKs that ship with their chosen silicon. Common stacks include the Nordic nRF Connect SDK and Zephyr RTOS, SoftDevice, Silicon Labs Simplicity Studio with the Bluetooth SDK, ESP-IDF for ESP32, and the TI SimpleLink CC2640R2 SDK. Many embedded projects also rely on FreeRTOS, Zephyr, or bare-metal scheduling.
On the testing and debugging side, expect familiarity with nRF Connect for Desktop and Mobile, Wireshark with a BLE sniffer like the nRF52 DK or Ellisys, Frontline BPA, J-Link debuggers, Saleae logic analyzers, and protocol-level tools such as LightBlue. Mobile-side, Core Bluetooth on iOS and the Android BLE stack are the baseline, with growing demand for Web Bluetooth in browser-based control panels.
BLE development spans nearly every connected-product category. Typical engagements come from:
Strong candidates show evidence of shipping real BLE products, not just lab demos. Look for portfolio entries describing specific chipsets, GATT profiles designed, OTA mechanisms implemented, and certification milestones reached. Code samples on GitHub, contributions to Zephyr or nRF Connect SDK, and documented power-consumption benchmarks are positive signals.
Ask candidates these interview questions to gauge depth:
Also confirm familiarity with the relevant Bluetooth Core Specification version, regulatory paths the product will follow, and the candidate's experience working alongside hardware, mechanical, and QA teams.
Freelancer.com hosts a global community of embedded engineers, mobile developers, and IoT specialists with verified profiles, client reviews, and portfolios covering BLE work across every major chipset family. You can compare bids from independent firmware engineers, full-stack IoT developers, and small embedded studios on the same project, then choose based on portfolio fit and proposal quality. Clients on Freelancer.com set their own budgets and receive competitive bids, with Milestone Payments holding funds in escrow until deliverables meet the agreed criteria. Whether you need a short consultation on a stuck connection issue or a multi-month firmware build, you can hire on Freelancer.com with confidence in the protections and the depth of available talent.
Ready to build a connected product with reliable wireless performance?
Hiring a BLE engineer is a technical decision, and the quality of your project post will determine the quality of bids you receive. The process below walks through writing a brief, comparing proposals, and awarding the project with the right safeguards in place. Each step is tuned to the specifics of Bluetooth Low Energy work, where chipset choice, GATT design, and certification scope drive both timeline and cost.
The brief is the single biggest determinant of bid quality. A clear, technical project post filters out generalists and attracts engineers whose chipset experience and protocol knowledge actually match your product. Head to the
Bids are short proposals, not just price quotes. They reveal how each freelancer interprets your brief, which chipset and SDK they would choose, and what timeline they consider realistic. Read each one carefully and shortlist candidates whose technical reasoning matches the depth of the project.
The final decision combines proposal quality with profile evidence. Review each shortlisted freelancer's portfolio, ratings, and written reviews, weighing consistency across multiple BLE projects rather than a single impressive demo. Embedded work rewards engineers who finish, certify, and support products in the field.
A simple GATT profile and mobile pairing demo can be completed in a few weeks, while a full product including firmware, OTA updates, mobile apps, and Bluetooth SIG qualification typically takes several months. Timeline depends on chipset choice, certification scope, and how mature the hardware design already is.
Yes. Many projects on Freelancer.com are scoped to a single layer, such as Nordic nRF52 firmware only or an iOS Core Bluetooth integration against an existing peripheral. If you need both sides, you can either hire one full-stack BLE specialist or run parallel engagements with a firmware engineer and a mobile developer.
A general embedded engineer writes firmware for microcontrollers but may not have deep experience with the Bluetooth stack, GATT design, pairing security, or BLE power tuning. A Bluetooth Low Energy developer specializes in the wireless protocol layer, certification process, and the interaction between peripheral firmware and central applications.
For focused work such as a GATT profile, OTA implementation, or mobile pairing module, a single freelancer is usually faster and more cost-effective. For products requiring concurrent hardware design, firmware, mobile apps, cloud backend, and certification, you may want a small team, which you can also assemble through Freelancer.com by hiring complementary specialists.
Many experienced BLE developers can guide you through Bluetooth SIG qualification, including selecting a qualified design ID, preparing the Declaration ID, and producing the required test evidence. Confirm this scope explicitly in the brief, since not all freelancers handle the regulatory and listing paperwork.
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