Principal Embedded Algorithms

1 week ago

London, Greater London, United Kingdom Biostream Full time £60,000 - £100,000 per year

Mission

Work within a team that owns the full path from raw on‑body signals (PPG/IMU) to validated vitals running on a constrained MCU. Prototype offline, then harden and deploy on‑device, shaping firmware and hardware choices to ship a reliable, low‑power wearable.

About

We're building a next‑generation wearable aimed at saving lives with embedded sensing and AI‑driven analytics. Small, focused team; high autonomy; fast decisions.

What you'll deliver in your first 90 days

  • Reproducible offline pipeline (Python/Matlab) for HR/RR/SpO₂ with motion handling; first pass at BP/PTT.
  • Data capture stack: synchronized PPG + IMU logs, simple labeling tools, ground‑truth protocols.
  • Firmware MVP on Cortex‑M/ESP32: sensor drivers, timestamping, buffering/streaming (BLE), low‑power plan.
  • Baseline report: signal quality, latency, and energy budget with a roadmap to on‑device vitals.

Responsibilities

  • Design & validate biomedical pipelines (PPG motion artifact reduction, baseline drift, sensor fusion with IMU).
  • Derive vitals (HR/RR/SpO₂) and explore BP via PTT; define calibration/quality metrics.
  • Architect embedded firmware: drivers, DMA, double‑buffering, storage/streaming, clock sync, power modes.
  • Prepare filters/models for TinyML / CMSIS‑DSP/NN; profile & optimize (fixed‑point where needed).
  • Guide hardware choices (AFE, LEDs/PDs, IMUs, antenna constraints); support bring‑up and lab validation.
  • Own data quality: capture protocols, ground‑truth pairing, QA dashboards, and acceptance criteria.

Must-have experience

  • 5–8+ yrs across biosignal processing (PPG) and embedded firmware on Cortex‑M/ESP32.
  • Shipped something that lived on a human body (medical/wellness/sports).
  • Proven motion artifact handling in the wild; calibration experience.
  • Strong Python + C/C++; comfort with profiling/optimization on MCU targets.
  • Lab chops: scopes, logic analyzers, PCB bring‑up, AFE tuning, RF basics.

Nice to have

Edge ML (TinyML, CMSIS‑NN, TFL‑M), OTA, BLE/GATT design, antenna tuning, small‑batch manufacturing test.

Engagements and benefits

  • Contract: 3‑month SOW with clear milestones; option to convert to full‑time.
  • Compensation: competitive day rate / salary + equity option on conversion.
  • Tools, dev kits, and lab access supplied as needed.
  • Remote (EU/UK) with reglar lab days in London.

How to apply

Send a short note with two shipped projects (links or brief) + CV/GitHub.

Include availability and preferred day rate.

  • Principal Embedded Software Engineer

    2 weeks ago

    London, Greater London, United Kingdom IC Resources Full time £80,000 - £120,000 per year

    Join a fast-moving team solving some of the hardest problems in applied AI. This company builds technology for real-world impact… systems that operate in extreme environments, support mission-critical operations, and push the limits of what embedded intelligence can do. They're looking for aPrincipal Embedded Software Engineerwho thrives on deep technical...

  • Senior/Principal Embedded Video Engineer

    2 weeks ago

    London, Greater London, United Kingdom Medtronic Full time £60,000 - £120,000 per year

    At Medtronic you can begin a life-long career of exploration and innovation, while helping champion healthcare access and equity for all. You'll lead with purpose, breaking down barriers to innovation in a more connected, compassionate world.A Day in the LifeAre you interested in developing embedded systems for the operating room? Do you like the challenge...

  • Java Developer – Algorithmic Trading

    2 weeks ago

    London, Greater London, United Kingdom UBS Full time £233,750 - £251,250 per year

    Job Reference #326868BRJob TypeFull TimeYour roleAre you passionate about delivering robust and scalable algorithmic trading systems? Are you motivated to deliver real business value? We're looking for someone to:work as part of a front-office Product Development technology team responsible for development of the Algorithmic Trading and Smart Order Routing...

  • Principal Biostatistician FSP

    5 days ago

    London, Greater London, United Kingdom Cytel Full time £60,000 - £120,000 per year

    Description Who Are You?  An experienced Principal Biostatistician with a passion for clinical development and analysis, adept at utilizing advanced statistical methods, you will lead one Phase I-IV clinical studies across your region. You are excited and enthusiastic, motivate your teams to do great work and collaborate easily with your clients. You never...

  • Principal Biostatistician FSP

    4 days ago

    London, Greater London, United Kingdom Cytel Full time £96,000 - £108,000 per year

    Description Who Are You?    An experienced Principal Biostatistician with a passion for clinical development and analysis, adept at utilizing advanced statistical methods, you will lead Phase III/IV clinical studies across your region including their medical affairs activities. . You are excited and enthusiastic, motivate your teams to do great work and...

  • Principal Product Manager

    2 weeks ago

    London, Greater London, United Kingdom Automata Full time £60,000 - £120,000 per year

    Level: 5Location: Hybrid - work in our London office a minimum of 3x/wk Principal Product Manager – Automation, Optimisation & Global ScaleThe MissionOur platform sits at the cutting edge of life sciences automation. It already saves lives, and now we're scaling it globally. That requires a Principal Product Manager who can operate across deep technology,...

  • Principal Algo Trading

    1 week ago

    London, Greater London, United Kingdom UBS Full time £80,000 - £120,000 per year

    United KingdomQuantitative AnalysisInvestment BankJob Reference #329539BRCityLondonJob TypeFull TimeYour roleWe are seeking an experienced candidate to join our Cash Equities CRB Quantitative Developer team within UBS Global MarketsThis is a fast paced and collaborative team that are responsible for the development and enhancement of the best-in-class Cash...

  • Embedded Systems Engineer

    3 days ago

    London, Greater London, United Kingdom Everfox Full time £40,000 - £80,000 per year

    Intelligent. Dynamic. Resilient.Everfox, formerly Forcepoint Federal, has been defending the world's most critical data and networks against the most complex cyber threats imaginable for more than 25 years. As trailblazers in defense-grade, high assurance cyber security, we have been leading the way in developing and delivering innovative cyber security...

  • Principal AI Researcher

    2 weeks ago

    London, Greater London, United Kingdom NEXAR Full time £80,000 - £120,000 per year

    DESCRIPTIONWe are on a mission to redefine the future of mobility through AI. As a Principal AI Researcher, you will lead groundbreaking research that connects the latest advancements in generative AI, multimodal learning, and visual intelligence with Nexar's large-scale data ecosystem.You'll be at the forefront of innovation — defining research...

  • Principal AI Researcher

    2 weeks ago

    London, Greater London, United Kingdom Nexar Full time £120,000 - £180,000 per year

    DESCRIPTIONWe are on a mission to redefine the future of mobility through AI. As a Principal AI Researcher, you will lead groundbreaking research that connects the latest advancements in generative AI, multimodal learning, and visual intelligence with Nexar's large-scale data ecosystem.You'll be at the forefront of innovation — defining research...