Upstaff

We are developing a crypto-based non-custodial funds transfer platform with Buy Now Pay Later service for medical equipment and services in South America and for LatAM<>US transfers

Requirements:

• Familiarity with Solana and other crypto ecosystems
• Experience integrating with ACH, KYC, exchange APIs
• 3+ years of experience with smart contracts using Rust + Anchor (Solana) or similar
• Experience developing or integrating Web3 wallets
• At least 4+ years of full-stack experience with Node.js and React
• Strong command of PostgreSQL and Redis
• Experience with major cloud ecosystems (e.g., AWS, GCP)
• Proficiency in English. Spanish would be an advantage.

Summary

- 5+ years of hands-on experience in Go development: Proven expertise in building scalable and maintainable backend solutions;
- Extensive knowledge and experience with Kubernetes Operators;
- Proficiency in Linux environments: Familiarity with Linux-based systems, scripting, and system-level troubleshooting;
- Cloud infrastructure expertise: Hands-on experience designing and managing resources on major cloud platforms (AWS, GCP, Azure, Oracle);
- Location: Ukraine (Kyiv, Zhytomyr, Vinnytsia, Khmelnytskyi, Chernivtsi, Ternopil, Rivne, Zakarpattia, Ivano-Frankivsk, Lviv, Volyn regions), Poland, Bulgaria, Romania, Czech Republic, Slovakia, Spain;
- Duration: potentially long term;
- Start: ASAP.

About The Role

The company is building a next-generation data platform designed for modern AI and cloud workloads. The product helps enterprises and research organizations transform legacy data silos into efficient data pipelines that enable GPUs, AI, and other performance-intensive workloads to run faster, scale more effectively, and consume less energy.

We are looking for a motivated and experienced Software Engineer with deep expertise in cloud infrastructure, networking, and security, alongside strong software development skills, to strengthen our infrastructure and related services.

What You'll Do:

• Develop k8s operator for deployment in Kubernetes;
• Develop a CSI plugin to serve storage to k8s applications;
• Design, develop, and maintain scalable solutions for deploying on leading cloud platforms, including AWS, GCP, Azure, and Oracle Cloud;
• Build and enhance cloud APIs for seamless integration with the software stack;
• Collaborate with cross-functional teams to align k8s and cloud capabilities with product requirements and customer needs;
• Monitor, optimize, and secure cloud and k8s environments to ensure reliability, scalability, and performance.

Our Stack:

• K8S operator and CSI;
• Cloud Platforms: AWS, GCP, Azure, Oracle;
• Programming Languages: Go, Python.

Qualifications:

• 5+ years of hands-on experience in Go development: Proven expertise in building scalable and maintainable backend solutions;
• Extensive knowledge and experience with Kubernetes Operators;
• Proficiency in Linux environments: Familiarity with Linux-based systems, scripting, and system-level troubleshooting;
• Networking and security knowledge: Experience with setting up secure networking solutions and managing cloud security configurations;
• Cloud infrastructure expertise: Hands-on experience designing and managing resources on major cloud platforms (AWS, GCP, Azure, Oracle);
• Strong communication skills: Fluency in English and ability to effectively collaborate in a distributed team environment.Senior Go Software Engineer.

Summary

* We are looking for a Senior MLOps/DevOps Engineer with Data Architecture, AI/ML skills, who will work on developing an AI platform with federated learning, cross-organization, and cross-domain collaboration. 
* Early-stage European startup
* Full-time long-term engagement.

Project Description

We are in the early stages of building a next-generation AI platform for creating, orchestrating, and durably executing data and ML workflows across heterogeneous data environments, streamlining cross-organization and cross-domain collaboration. 

The platform is a tool for data engineers and data scientists who deal with ontology, data extraction, workflow orchestration, and execute pipelines with multiple sources.

Some of the featured functions:

• Source connection and data interpretation
• Automated ontology and knowledge graph creation
• Self-healing infrastructure with semantic understanding
• Custom data pipeline building capabilities
• Bridge semantic and structural data gaps, and advanced ontology extraction.

Primary Responsibilities Include

• Infrastructure architecture: Platform from scratch, including integrating contextualization and schema mapping models into real-time workflows, metadata management, and end-to-end integration of system components.
• Collaborate with stakeholders (manage AI/ML complexities and contribute to system design)
• AWS Cloud Infrastructure
• Pipelines: Set up and optimize CI/CD pipelines (Python, Terraform, Kubernetes, Airflow) for custom ML and data workflows. 
• Deployment and monitoring Models: Deploy proprietary and third-party ML models, logging, performance reliability, and error detection. 
• Reliability and Automation: Automate infrastructure provisioning, testing, and deployment with Terraform, embedding fault-tolerance and observability to minimize downtime in complex and multi-source environments.
• Security & Compliance: Implement zero-trust security (e.g., attribute-based/role-based access control, encryption, and SSO)
• Collaboration & Mentorship: Work together with the lead AI engineer and other stakeholders in order to co-design orchestration tools and contribute to system design.

DevOps/MLOps Role Requirements

• Lead infrastructure scaling efforts as first/early DevOps hire
• AWS cloud
• GitHub Actions (or similar CI/CD), Kubernetes, MLOps (model deployment, versioning, monitoring)
• Python proficiency essential, GoLang beneficial
• Database knowledge: Postgres, Redis (required), Neo4j (nice-to-have)
• Monitoring tools: CloudWatch, Prometheus, Grafana, OpenTelemetry, Jaeger
• Infrastructure-as-Code experience (e.g., Terraform/OpenTofu)

General Team Skills Coverage:

1. Ontologies, Semantics, Knowledge Graphs
2. Data contextualization & transformation
3. Data federation & correlation
4. Time-series data & streaming data handling
5. RPA - Robotic Process Automation
6. MLOps
7. Policy engines
8. Backend (Go, Python)
9. Databases 
10. Infrastructure and DevOps (AWS)
11. Security & Zero Trust (attribute-based access control, role-based access control, encryption, SSO)
12. API & codeless integration agents (Zapier-like functionality)

Summary

A Flutter Engineer is needed to join the Home Automation and Security mobile team. This is a long-term full-time remote/hybrid position. Requirements: 3+ years of experience in Flutter, RESTful APIs, widgets, Reactive Programming (e.g., Streams, RxDart), State management (Redux or similar, e.g., Provider, Bloc), TDD would be an advantage.

Required Experience & Qualifications

• In-depth experience with Flutter architecture and widget lifecycle
• Strong knowledge of Reactive Programming(e.g. Streams, RxDart)
• 3+ years of professional experience in iOS or Android development
• Solid understanding of Object-Oriented Programming (OOP) and SOLID principles
• Practical, hands-on experience with RESTful APIs
• Proficiency in Redux or other state management solutions (e.g., Provider, Bloc)
• Familiarity with Test-Driven Development (TDD) and writing unit tests

What We Offer

• Option to work remotely (or from office in Kyiv, Ukraine)
• Flexible 8-hour workday
• 20 paid vacation days annually
• Health insurance package
• A professional, growth-oriented environment

Responsibilities:

• Develop and maintain cross-platform Flutter applications
• Write clean, testable code and maintain unit tests
• Perform regular code reviews and ensure code quality
• Collaborate on defining and improving application architecture

About the Project:

You will join an international development team of one of the global leaders in intelligent automation, advanced energy solutions, security and fire protection. With over 140 years of innovation, we develop cutting-edge technologies that enhance efficiency, safety, and comfort in buildings worldwide. Our mission is to create a smarter, healthier, and more sustainable future through intelligent automation and advanced energy solutions.

Summary

- 5+ years of C++ software development experience;
- Strong understanding of object-oriented programming;
- Experience with multi-threaded and multi-process development;
- Hands-on client development across multiple OSs/platforms;
- Solid understanding of Mac, Linux, and Windows internals;
- Location is Ukraine (Kyiv, Zhytomyr, Vinnytsia, Khmelnytskyi, Chernivtsi, Ternopil, Rivne, Zakarpattia, Ivano-Frankivsk, Lviv, Volyn regions);
- The model is direct hiring;
- Duration is 3-4 months.

Role Overview

As a C++ Engineer on our team, you’ll design, build, and optimize our real-time endpoint agent using modern C++ across Windows, Mac, and Linux environments. You’ll collaborate closely with product, backend, and security teams to drive end-to-end feature development, leveraging deep OS internals knowledge to protect real-world customer environments.

Responsibilities:

• Develop a real-time agent (written in C++) that collects massive amounts of data from endpoints, leveraging cutting-edge technologies, and getting familiar in-depth with the OS internals;
• Commit full end to end feature development - from planning to automation;
• Design and develop solutions in collaboration with multiple dev teams.

Requirements:

• 5+ years of C++ software development experience;
• Strong understanding of object-oriented programming;
• Experience with multi-threaded and multi-process development;
• Hands-on client development across multiple OSs/platforms;
• Solid understanding of Mac, Linux, and Windows internals;
• Experience with high-performance client-server communication;
• Ability to independently own features end-to-end while collaborating across teams;
• Familiarity with various build tools and compilation environments;
• Security or cybersecurity background - a plus.