Cosmin Rusu

Duty Ventures - Software Design and Engineering Company

I'm leading a software development agency focused on fast iterations. Most of our clients are shipping more features, responding faster to support tickets, and have accelerated growth because of us.

We focused on HealthCare a lot lately due to the accelerated digitalization in this industry. I am a strong believer that we can make healthcare more technically advanced via pure software. 

In terms of technologies, our previous projects involved Ruby on Rails, React, React Native, Scala, Java, Kubernetes, GCP, AWS (ECS, RDS, AKS), Stripe Connect, HIPAA compliance.

Some of our previous clients: 
- Spotify
- Colgate
- Go4Ellis (incl. HIPAA compliance)
- KindBody (+1 HIPAA)
- NXT Sports
- Noom (Healthcare)
- Mochila Fulfillment
- 3Step
- Mylk Guys (YCombinator)
- NLV Productions
- SH Technologies
- One Step Software (Techstars)
- Ergodic Labs
- Med Prep
- Testing Psych
- Abundance Digital
- Tookitaki

Founder & Lead software engineer

Apple

Web Answers on the Siri Experience team, working on open-ended question answering. BERT, SBERT, TensorFlow

Machine Learning Engineer

Google

Intern in Google Ads team. Developed a daily training and prediction pipeline for a machine learning model. Worked closely with the data science and development team to integrate the R model in C++.

Intern in the Google Photos team. The project involved extending the selection framework for auto-created movies based on user content and implementing three new concept movies. Exposed to: Java 8, Protocol Buffers

Software Engineering Intern

Amazon

Amazon Development Center Iasi - Robot Detection Research team
The project involved creating a linkage and score system for robotic attributes. The main challenge was the huge amount of nodes and data that had to be processed every day.
Exposed to: Hadoop, MapReduce, Machine Learning, JavaScript, NodeJs

Software Engineer Internship

Transforming Visions into AI MVPs & Products | Founder @Duty Ventures | Ex {Google, Apple and Amazon}

Hi, I’m Cosmin, the Founder and Lead Engineer of Duty Ventures. 

After some experience as a software developer in companies such as Google, Apple, and Amazon, I decided to launch my project.

With several former colleagues and college friends, we launched our own startup specializing in software development for entrepreneurs and customers needing software development services. 

Duty Ventures is all about developing software products from start to finish, thanks to the experiences we have all acquired in the past years.

One of our most successful services is aimed at entrepreneurs and early-stage founders, for whom we provide an MVP-builder service getting their product from 0 to 1 within weeks!

However, our services are not limited to that. The teams we create do much more than just create MVPs and are able to adapt to the different technologies requested, all of this in an agile way.

Our most recurrent services are the following:
- MVP creation
- Custom Software Development
- Blockchain Development
- Mobile Development
- Checkout pages
- E-Commerce

And our most used technologies are:
- Ruby on Rails
- React
- React Native
- Java
- NodeJS


If you want to learn more about how we can help you, head over to: https://dutyventures.com


Phone: (+1) 669 200 9568 / (+40) 754 973 314
Email: cosmin@dutyventures.com

Engineering Teams for Ambitious Founders | Founder @Duty Ventures | Ex {Google, Apple and Amazon}

Perhaps my biggest lesson from working more than 5 years providing Software Development Services is: don’t burn bridges. It’s hard to do it. At some point, you might not deliver as well as you used to. There are peaks, and they are valleys. We need to be able to cross both, since we only have a North Star. What’s important is the process, not the outcome. If you focus on the process, the right outcomes will naturally come.

Now back to my idea: no matter what happens with a relationship, it’s best to end it on good terms. Make sure both sides are happy after moving in completely different directions. Why? Because really, that leaves the door open for future opportunities. This happened to me! Not once, not twice, but many times. Your current project might end, but the founder will have another side project they want to pursue, or they will move to a high-growth startup that could use your expertise.

It’s easier and better to invest in current and previous relationships than to build new ones. But one needs to do both for the best outcomes.

Remote work sounds simple. Hire from anywhere. Get talent everywhere.

But here’s what nobody tells you - compliance is a minefield.

Every country has its own labor laws, tax codes, regulations. What’s fine in the US might get you flagged in Germany or India.

I’ve worked with startups scaling global teams and seen founders blindsided by fines, audits, or even payroll freezes. Usually because they tried to copy-paste a US process onto the world.

Here’s what I tell anyone building a remote team:
- Never assume the rules are the same. Research each country before you hire.
- Don’t rely on guesswork. Use proper global payroll and compliance platforms.
- If you’re unsure, talk to a local expert. A quick check can save you months of trouble.
- Pay attention to IP and confidentiality laws. These differences can bite you later.

Bottom line: remote work makes geography irrelevant for talent, but not for compliance.

Get this wrong, and small mistakes become big distractions. Get it right, and your team can focus on what matters.

Ran into compliance surprises building your team? I’d love to hear what happened and what you learned.

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FastSwaps

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Co-Founder

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The Data Swiss

We build robust data & ML platforms in the cloud so you can have any kind of insight within days, not months.

Founder & Principal Data Solutions Architect

Telia

Working on releasing ML platform functionalities and at the same time provide support and create documentation so application teams can leverage platform for doing their data analysis processes. Some of the projects:

- Extending, supporting and developing new functionalities of our ML platforms. Working with CFn, Service Catalog, SageMaker mostly, among many other services.
- Architect and define usage of Sagemaker Feature Store for tenants.
- Work related to operations in ML environments.

Stack: 

- Github actions as CI/CD + OIDC.
- HashiCorp Vault for credential management.
- Python and Bash.
- AWS.
- Airflow. For orchestrating and scheduling any workflow at scale.
- CloudFormation (CFn).

MLOps Engineer

Working on releasing Data Foundation and ML platform functionalities and at the same time provide support and create documentation so application teams can leverage platform for doing their data analysis processes. Some of the projects:

- Enabling serverless ingestion from on-prem to different business layers (s3 and redshift) using SDLF from AWS.
- Developing and implementing an abstract and centralized solution to define datasets that are ingested/residing within our cloud platform and handle permissions through Lake Formation.
- Implementing solutions according to the General Data Protection Regulation (GDPR): RTE tasks, purposed-based access, etc.
- Leading the organization adoption of Hashicorp Vault for our GitHub repositories to get AWS secrets and GitHub tokens. As part of this, we are decommissioning our old solution and I developed a framework in Python that acts as a IaC for Hashicorp vault components (it creates engines, roles, tokens, policies, etc).

Stack: 

- Github actions as CI/CD.
- HashiCorp Vault for credential management.
- Python.
- AWS. Wide variety of services: S3, Lake Formation, Glue, Lambda, Step Functions, SQS, SNS, KMS, Athena, Cloudtrail, IAM, SSM, Redshift, EventBridge, DynamoDB, etc. Worth mentioning we are using for one of our projects, Serverless Datalake Framework (SDLF) for ingesting data from on-premises up to the business layers.
- Airflow. For orchestrating and scheduling any workflow at scale.
- Jenkins. For deploying to our on-premise ecosystem.
- Terraform. For keeping all our IaC and managing infrastructure state and changelog.
- CloudFormation (CFn).

Senior Data Platform Engineer

Factmata

Acquired by PR giant Cision.

1) In charge of running infrastructure cost optimizations. Reduced over 70% in 5 months.
2)  Guide the team by setting technical directions, architectural governance, design patterns, and practices.
3) Architect and build highly scalable solutions for diversified and complex data flows.
4) Active role in interviewing candidates for technical positions (Back-end/Front-end and Data Engineer).
5) Create 'shardflow ecosystem'. This solution allows our RDS databases (or shardflows) to scale out/in and up/down and provides an API for creating, migrating, resetting and deleting shardflows.
6) Work with Kubeflow in k8s for running our ML pipelines and generate clusters and insights for our SaaS platform.
7) Implement a serveless ELT from different data providers (twitter, reddit API, etc) to ingest these data into our different data lake layers using Lambdas, Event Bridge, S3, Glue and Athena.

CTO & Data Solutions Architect

Bluetab Solutions

Projects I have developed [D] and/or contributed [C] within /bluetab:

1) [D] Migration to AWS of an algorithm developed by UC3M that finds association between power plants and meter boxes within the Spanish territory. Big Data project using several Amazon services such as EMR, Batch, Lambda, SQS, Cloud Formation, Athena, etc. I am also working with deployment tools such as Jenkins and Terraform as IaC.

2) [C] Automation and enhancement of a current solution that ingests data from databases in premises to our DW on AWS Cloud. Files are ingested in S3 and then, ETLs orchestrated by Airflow are triggered. In this solution we are using a wide variety of services, for example, EMR for applying transformations and/or consolidate data, DMS for retrieving the data from the on-premises databases, DynamoDB for storing metadata about the states of the different processes, etc.

3) [D] Bluemetric is a highly flexible solution that recurrently extracts relevant metrics from different services of AWS by using both CloudWatch and CloudTrail. Such metrics are materialized wherever specified (RDS, S3) for further analysis, for example with PowerBI, QuickSight.

4) [D] Bluehaul is an event-driven architecture almost-serverless solution that makes files that are ingested within the cloud (namely, S3) available for analysis and computation. It is mainly focused on the movement and optimal structuration for efficient retrieval and manipulation. Services used: S3, CloudWatch, for triggering events and monitoring, Lambda, DynamoDB, SNS, ECR and AWS Batch.

5) [D] Architecting and developing a scalable, resilient and distributed platform in AWS to programmatically schedule and monitor workflows (using Apache Airflow) for ETL processes within Datalakes across multiple projects.

6) [C] Providing support on an ETL project in Redshift orchestrated by Apache Airflow.

AWS Data Engineer

Big Data dept at University Institute of Intelligent Systems and Numeric Applications in Engineering

Collaborating on OSMOSE, a European H2020 project. 

1) Developed Pyself framework. A novel simulation lab factory for Siemens PSS/E. It was used for analysing and optimising the impact of a new device within the electrical system in the Canary Islands.
2) Submitted a paper titled "OPTIMISING POWER SYSTEMS BY AUTOMATING LARGE SETS OF SIMULATIONS"  to The European Multidisciplinary Society for Modelling and Simulation Technology (EUROSIS) as a result of Pyself.

Research support technician

Self-Employed

Teacher of Programming

Self employed

Utterly plunged into the wondrous world of teaching Mathematics and Physics to 12th-grade students (Bachillerato and Uni)

Teacher of Mathematics and Physics

EIFER - European Institute for Energy Research

1) Research and develop a web-based application (SAVVY) for visualizing different kind of graph-based datasets within the company.
2) Extensive research on the suitability of using SPARQL and Graph Databases such as Neo4j for the aforementioned objective.

Technical Support Engineer (Intern)

Data and ML Engineering | Founder @TheDataSwiss

Hace 1 año que salí de prisión.

Una prisión en la que podía salir a la calle.

En la que tenía los sábados, domingos y generalmente todas las tardes para mí.

En las que dormía en mi casa.

En las que tenía 23 días por año para irme a Indonesia si quisiera.

Pero de resto, jodido. Tenía si o sí que estar en prisión.

Por suerte, me escapé.

Y ahora vivo en otra prisión construida por mi en la que no salgo casi nunca, jajajajjaa.

Mierda.

He ido a peor. ¿te has dao cuenta tu también no?

Tomás Denis Reyes Sánchez

Ayuda a hombres a tener relaciones con mujeres sin depender de Tinder.



Llegan los primeros resultados de los alumnos dentro de la formación Apollo.

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No tenía página de ventas.

Y ahora hace 2 semanas empezó con Meta Ads.

Desde entonces crece gratis. 

Nada mal para empezar jajaja.



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