Altar.io

We are an award-winning product and software development company formed by ex-startup founders who have a deep understanding of the startup ecosystem. We leverage our entrepreneurial experience and proven processes to design and build high-quality, user-centric software products that empower entrepreneurs and business leaders to challenge and transform their industries. Our Northern Star is the success of our clients. To help them build successful products, we mimic the behaviour of an internal team through a policy of extreme transparency and close communication. Our approach includes: ▪️ Co-founder Mentality: We work closely with our clients as an extended team of co-founders, providing guidance and support throughout the product development process. ▪️ Lean Methodologies: We use lean methodologies to create the smallest first viable version of your product possible,resulting in a quick time to market and a focus on solving the users' problems. ▪️ Product-led Approach: We combine our clients' industry expertise with our deep knowledge of product development to create a comprehensive product blueprint that outlines the path of least resistance to test the market. ▪️ Top Talented Team: Ourteam of top-tier professionals, based in Portugal, ensures that every user story and every line of code is written with precision and efficiency. This combination of the right mindset, frameworks, and people has led to exceptional results for our clients, including: ▪️ Two-thirds of our clients have achieved VC funding in an ecosystem where only ~0.05% of startups reach that landmark; ▪️ $MM raised months after their MVP releases from firms like Tiger Global Management, Disney & TechStars; ▪️ Being featured in global publications, such as Fast Company, Product School, Forbes, Business Insider or Sifted; ▪️ Winning awards like Swiss Startup of the Year or Fast Company’s 10 Most Innovative Companies. To learn more about us, visit https://altar.io/ and altar.io/us

altar.io

Altar.io

altar.io

HQPT

Team Size46

Open Jobs

TL;DR

Headquarters: Lisbon, Portugal

Business: Product and software development agency (MVPs, UX/UI, custom engineering, AI enablement)

Founders: Daniel de Castro Ruivo; André Lopes; Paolo Dotta; João Ribeiro

Team size: 46 employees (reported)

Company Overview

Problem Domain

Helping organisations rapidly design, validate and build digital products and MVPs.

Industry

IT Services and IT Consulting

Funding Track Record

Funding

Founders

What we do

TL;DR

Company Overview

Funding Track Record

Founders

What we do

Altar.io

altar.io

Altar.io

altar.io

HQPT

Team Size46

Open Jobs

Latest FundraiseUnknown

TL;DR

Headquarters: Lisbon, Portugal

Business: Product and software development agency (MVPs, UX/UI, custom engineering, AI enablement)

Founders: Daniel de Castro Ruivo; André Lopes; Paolo Dotta; João Ribeiro

Team size: 46 employees (reported)

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Company Overview

Problem Domain

Helping organisations rapidly design, validate and build digital products and MVPs.

Industry

IT Services and IT Consulting

Funding Track Record

Funding

Founders

What we do

Related Companies

Company	HQ	Industry	Total Funding
Assaia – The ApronAI	🇨🇭Zürich, CH	Data and AnalyticsDeepTechInformation TechnologyTransportation	$27M
Aiphoria	🇨🇾CY	Information TechnologySoftware	-
Unseenlabs	🇫🇷FR	—	$33M
Orga AI	🇪🇸ES	Data and AnalyticsDeepTechEducationInformation TechnologySoftware	-
Fluxon	🇺🇸San Francisco, US	DeepTechInformation TechnologySoftware	-

Join the Team

Senior Python Developer - R&D Project

RemoteLisbon, Lisbon, PT

Remote • Lisbon, Lisbon, PT

Hello! Are you a Senior Python Developer based in Lisbon or Europe looking to work on a technically challenging R&D project with real-world scientific impact? At Altar.io , we’re looking for someone who enjoys working close to the problem space — from hardware to real-time data processing and user-facing applications.

This role is centered around a long-term R&D project for a marine biology research client, combining real-time signal processing, hardware integration, and full-stack development. You’ll work closely with researchers and our internal product team to tackle problems without predefined solutions.

We're working on an R&D platform for a marine biology research client. The system captures underwater acoustic signals via a multi-sensor array, processes them in real-time, and generates interactive feedback for research experiments.

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Backend Developer

Full-timeMunich, DE

Full-time • Munich, DE

Frontend Developer

InternshipBerlin, DE

Internship • Berlin, DE

Technical Writer

Full-timeMunich, DE

Full-time • Munich, DE

Machine Learning Engineer

Part-timeLondon, GB

Part-time • London, GB

Software Engineer

ContractLondon, GB

Contract • London, GB

Frontend Developer

ContractMunich, DE

Contract • Munich, DE

About The Project

This is a unique R&D project combining hardware integration, real-time signal processing, and web application development. You'll work directly with researchers and our internal product team to solve genuinely novel technical challenges.

The Challenge We need someone who can:

Own the Python processing pipeline — Real-time data acquisition, signal processing, detection algorithms
Integrate hardware and software — Sensor arrays, data acquisition hardware, real-time data streams
Maintain and extend the full stack — Node.js API, NextJS frontend, MQTT messaging
Collaborate with domain experts — Work with our product team and external consultants on algorithm
refinement
Contribute to other projects — As this project stabilizes, help with other Python/backend/AI initiatives

Technical Stack Core

Python — Data acquisition, signal processing, algorithm implementation
Node.js / TypeScript — Express API, Socket.IO, real-time systems
NextJS — User-facing application
MQTT — Real-time messaging between hardware and cloud
Docker — Containerized deployment

Signal Processing / DSP — Frequency analysis, real-time audio, sensor dataTensorFlow / ML — Model training, inference pipelines
Hardware integration — Experience with DAQ systems, sensor arrays
Angular — Legacy tool maintenance

What We're Looking For Must Have

5+ years of software development experience
Strong Python skills — Production-quality code, comfortable with data/signal processing
Backend web development — Node.js, APIs, real-time systems (WebSockets, MQTT)
Problem-solving in ambiguous contexts — This is R&D; you'll need to figure things out
Self-directed — Can work independently with periodic check-ins

Strong Preference

Signal processing / DSP exposure — Frequency analysis, sensor data, real-time streams
Full-stack capability — Can work across Python, Node.js, and frontend when needed
Scientific or research background — Comfortable with experimentation and iteration
Nice to Have
ML/AI experience — Model training, TensorFlow, data pipelines
Hardware integration — Sensors, data acquisition, embedded systems
Why This Role
Unique R&D project — Not another CRUD app; real signal processing, hardware integration, research impact
Technical variety — Python, Node.js, real-time systems, ML — not siloed into one stack
Growth opportunity — Lead role with ownership of technical direction
Versatility — Contribute to this project and help with other Python/backend/AI initiatives as they arise
Strategic position at Altar — Help rebuild our Python/AI capabilities as we grow

About Altar.io Altar.io is a Lisbon-based product and software development studio. We partner with entrepreneurs and business leaders to design, build, and launch innovative digital products — from MVPs to full-scale platforms. We work across web, mobile, and emerging technology projects . This role starts with a long-term R&D engagement but includes opportunities to contribute to other projects as capacity allows.

What to Include in Your Application:

Your experience with Python in production — Data processing, APIs, real-time systems
Examples of R&D or ambiguous problem-solving — How do you approach problems without clear specs?
Any signal processing or hardware integration experience — Even if limited

If you got increasingly excited about Altar while reading this, then we’re just as excited about you! Apply now and let’s see if we can make you the next Altarion.