Jobs Developers

Who we are 

We are a Ukrainian multiproduct company for more than 500.000 clients from 120 countries.

Since 1997, we have been streamlining data workflows for professionals and teams with our intuitive and efficient software products. We’re committed to enhancing our customers’ experience across the globe by minimizing data-related tasks and enabling them to focus on more inspiring goals. Whether it’s Fortune-100 companies or individuals, we provide a customer-centric approach, delivering high-quality solutions and exceptional support.

Product that needs your engagement 

Mobion is a cloud-based white-label platform for ride-hailing and corporate transport services. Launched in 2016 by Devart, it supports operators in 6+ countries and has handled over 20 million rides for 4M+ users and 500K drivers.

Our ecosystem includes rider and driver apps, a real-time dispatch system, admin dashboards, and branded web portals — all backed by a secure, scalable Azure infrastructure. We offer both SaaS and franchise models to help partners grow fast across regions.

Your future team of professionals 

You will become part of a dynamic Mobion Backend Team, where we value ownership, curiosity, and collaboration. The team consists of four Backend Developers and shares a strong feedback culture and growth mindset — we don’t just build features, we solve real problems.

Impact you will make 

This role focuses on building scalable, reliable, and high-performance backend solutions for white-label and SaaS platforms. You will be responsible for designing, developing, and maintaining server-side systems, ensuring smooth integration with client applications and third-party services.

• Implement new technologies and engineering practices to optimize development processes and improve product quality.
• Define and maintain the overall system architecture, establish design patterns, and ensure technical decisions align with business objectives.
• Design, develop, and maintain scalable and secure APIs.
• Optimize database queries and improve overall system performance.
• Monitor, analyze, and proactively improve system reliability and performance.
• Investigate, troubleshoot, and resolve production issues in a timely manner.
• Enhance and maintain CI/CD pipelines and deployment processes.
• Provide mentorship, technical guidance, and coaching to team members.

Skills we are looking for 

• 5+ years of experience in backend development using Node.js.
• Experience working with SQL and NoSQL databases, including schema design and query optimization.
• Solid understanding of API design and hands-on experience with API integration (RESTful services).
• Experience using version control systems, particularly Git.
• Familiarity with project management tools, such as Jira or similar.
• Experience with cloud platforms and application deployment (AWS, GCP, Azure, or equivalents).

Benefits you get

• Maintain your work-life balance

Manage your own working hours with our flexible schedule

19 days of annual vacation granted on a pro-rata basis

No overtimes required

• Hybrid type of cooperation

Whether you prefer to work remotely in the comfort of your home office or from one of our 4 offices, you can still take part in increasing the world`s awareness about quality Ukrainian products from any part of the world

• Stay healthy

Medical insurance from one of the top insurance companies in Ukraine with a wide range of included services, as well as special programs for relatives; and special options for those who live abroad.

15 working days of sick leave per year — because your health is a priority.

• Grow with us

In-house English courses — increase your proficiency through our online courses and speaking clubs with a native speaker

Online learning activities — workshops, lectures, and webinars to enhance your leadership, management, and self-awareness skills

Experience exchange — we are proud of our team of professionals who gladly share their deep expertise in all kinds of fields with the rest of the team

Promotions, rotations, and transitions — when you believe your skills could benefit a different role or team.

• Stand with Ukraine!

We have an active pro-Ukrainian position, and that means we help our army, our servicemen, and their families not only through constant donations and volunteering, but also through our military leave policy, special health insurance options, and financial help

We are a perfect match if you share our values

We are professionals in our field.

We know how to turn up our professionalism to the maximum, because we are experts who enjoy solving complex tasks.

We know how to focus on the product, think big, and at the same time delve deep into the details.

We create a calm and friendly atmosphere within the company.

We value the freedom of open and transparent communications.

Radical honesty is embedded in the foundation of our culture.

We are open to new things and constantly develop and practice regular knowledge sharing, which helps us evolve continuously.

Most importantly, the company creates an environment where we can fulfill our potential upon a solid foundation.

Our Hiring Process

• Recruitment Interview
• Technical Interview
• Management Interview
• Offer Call

We strive to ensure transparency and openness in the hiring process, and we understand the importance of providing timely feedback. If your resume meets the job requirements, we will contact you to clarify details and schedule an interview within 2 weeks after your application is submitted.

The timeframe for feedback between interview stages may take up to 2 weeks.

Description

Domain: AI Recruiting Platform
Client: USA
Location: Remote
Time Zone: until 20-00 by CET
Contract: B2B

About US
DevKit is more than just an IT company - we are a team of passionate professionals dedicated to creating cutting-edge solutions. Our employees work on exciting international startups, collaborating with highly skilled teams from around the world. With expertise in software development, design, and engineering, we help bring innovative ideas to life and drive success on a global scale!
Our mission is to connect exciting projects with top-tier professionals. We are committed to creating a dynamic space where innovation thrives, top talent excels, and global teams unite to develop cutting-edge solutions.

About PROJECT
The largest AI recruiting platform built for growing professional recruiting firms worldwide. We help firm leaders scale by aligning their teams around a repeatable recruiting workflow, consolidating their full recruiting stack into one platform, and embedding AI intentionally & strategically.

About the ROLE
We are looking for a very experienced Full-Stack Engineer to join the Client’s Technical Team for the development of a new portal and extension of an existing backend platform. The portal will enable small and mid-sized businesses to book staffing services fully online, supporting the company’s transition to a scalable B2B self-service platform.

Team Size: 50 people overall
Team Location: the US and Ukraine

TECH STACK
Ruby on Rails + React.js + PostgreSQL + REST APIs + AWS

Requirements

- 6+ years of backend development experience with Ruby on Rails.
- 4+ years of designing and building REST APIs and backend integrations.
- 4+ years of working with PostgreSQL, including data modelling and performance optimization.
- 4+ years of strong experience with React.js / TypeScript / JavaScript.
- Familiarity with AWS-based infrastructure.
- English Level: at least strong B2 level (Upper-Intermediate)

Responsibilities

- Design, develop, and extend backend services using Ruby on Rails.
- Build and maintain scalable APIs supporting the new customer portal and mobile integrations.
- Improve and optimize PostgreSQL data models and database performance.
- Contribute to the evolution of a microservices-based architecture.
- Collaborate with the frontend part using React.js stack (framework)

Work conditions

- A long-term role in a stable, fast-growing company
- Flexible working hours with a results-oriented approach
- Competitive salary and benefits package (vacation, sick leave, national holidays)
- Comfortable workspace, corporate events, and team-building
- Continuous learning, professional growth, and skill development

If you're looking for a place to grow, innovate, and make an impact, we'd love to have you on board!

🚀 Junior Node.js / React Developer (with growth potential)

Looking for a project where you can dive into complex architecture, work with a modern stack, and actually influence technical decisions?
You’ve just found it. 👀
 

🔧 About the project

We’re building a platform with a deeply integrated architecture based on PostgreSQL (RLS + triggers), GraphQL + PostGraphile, Graphile Worker, React, Node.js, AWS, and Hugo.
This isn’t just about shipping “features” — you’ll be solving real architectural challenges that will help you grow technically and professionally.
 

💡 Our values

• Continuous growth and active involvement
• Responsibility and initiative
• A flexible, problem-solving mindset
   

✨ What we offer

• Work on a project with serious architectural depth
• Real influence on technical decisions
• Fully remote work format
• A team of professionals who are always ready to share experience and help you grow
   

📌 Your responsibilities

• Develop and maintain features using Node.js (Express) and Workers
• Work with PostgreSQL (RLS, triggers)
• Integrate GraphQL APIs (PostGraphile, Apollo Client)
• Take part in architectural discussions and solution design
   

✅ What we expect from you

• 0.5+ years of experience with Node.js, React, Express
• Experience working with PostgreSQL (RLS, triggers — a big plus)
• Understanding of backend architecture and security models
• Experience with AWS (S3, CloudFront) is a plus
• English level: B2 or higher
   

🛠 Our tech stack

Node.js, Express, Workers
React, Next.js
PostgreSQL (RLS, triggers)
GraphQL, PostGraphile, Graphile Worker
Apollo Client, GraphQL Code Generator
AWS (S3, CloudFront)
Keycloak
 

💬 Tools we use

• Slack — communication
• Asana — task management

Playson 🤘 is a leading online gaming supplier founded in 2012 that has developed worldwide recognition in the industry.

Our promotional features team is seeking a Senior Backend Engineer with a strong background in Node.js. This role is focused on developing and optimizing promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.
If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast “PoC first” approach with a deep sense of ownership, we would love to hear from you.

To succeed in the role, you will have:

• Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly.
• Strong understanding of Async approaches
• Experience with Messaging systems like Kafka, RabbitMQ
• Experience in distributed systems
• Experience with RDBMs (MySQL, PostgreSQL etc.), CDBMs (Redshift, ClickHouse etc.), NoSQL (DynamoDB, MongoDB, etc)
• Experience in writing e2e & unit tests
• Experience with development production-ready solutions
• Hands-on product experience with Kubernetes

Would be beneficial to know:

• Understanding of enterprise development patterns
• Experienced with large-scale microservices architecture
• Experience with cloud providers (AWS, GCP, etc.)
• Active performance observation
• Gambling domain experience
• Understanding of application security and industry standards, its best practices

What will you be doing?

• Develop and maintain robust backend systems for our promotional features.
• Optimize existing systems for enhanced performance and scalability.
• Lead technical decisions and contribute to our SaaS solutions.
• Collaborate with distributed teams to innovate and implement new features.
• Ensure code and architectural excellence through reviews.
• Address complex technical challenges with innovative solutions.

What you get in return:

• Competitive Salary: We offer a competitive salary in EUR, subject to annual performance reviews
• Quarterly Bonuses: Benefit from a transparent and systematic quarterly bonus system
• Flexible Schedule: We offer a flexible work schedule to accommodate your needs
• Remote Work Option: Choose to work remotely, providing greater flexibility and comfort
• Medical Insurance: Receive comprehensive medical insurance for both you and a significant other
• Financial Support for Life Events: We provide financial support during special life events
• Unlimited Paid Vacation: Enjoy unlimited paid vacation leave
• Unlimited Paid Sick Leave: Take unlimited paid sick leave whenever necessary
• Professional Development: Get reimbursement for professional development courses and training

Join us today!

Description

GlobalLogic is seeking a Lead Software Engineer with over 8 years of experience to provide technical leadership for a dedicated engineering team. This role focuses on the development and maintenance of a high-fidelity medical technology platform encompassing frontend, backend, and native mobile applications. While collaborating with the project architect, you will primarily focus on code quality, technical execution, and the mentorship of the engineering bench within a highly regulated environment.

Requirements

• Professional Experience: 7+ years of software engineering experience, with a proven track record in technical leadership or principal-level roles.
• Cloud & Backend: Advanced proficiency in developing Python-based services specifically within AWS environments.
• Frontend Expertise: Extensive experience with Vue (2 & 3) frameworks for complex, state-heavy web applications.
• Mobile & Multi-Platform: Familiarity with native mobile development (iOS/Swift) and multi-region SaaS architectures.
• Regulated Industry Knowledge: Strong experience delivering software within a regulated framework (e.g., healthcare or medical devices) is highly preferred.
• Tools & Observability: Experience with performance testing tools (e.g., Grafana k6) and observability stacks to monitor end-to-end workflows.
• Communication: Exceptional verbal and written communication skills for effectively coordinating with distributed teams and senior architects.
• English: Advanced.

Job responsibilities

• Technical Leadership: Serve as the tech lead for the engineering bench, overseeing day-to-day implementation across usability and performance workstreams.
• Code Excellence: Lead rigorous code reviews and establish the quality bar for all technical deliverables to ensure they meet internal standards.
• On-Call Management: Act as the captain for the on-call rotation, ensuring platform stability and overseeing production support.
• Mentorship & Growth: Provide senior-level execution capacity while mentoring mid-level and senior engineers on the team.
• Quality Governance: Work through internal review gates to ensure all software changes meet strict medical safety and compliance requirements.
• Operational Stability: Support the expansion of test automation and performance testing coverage to ensure long-term system reliability.

We are looking for a Junior Strong Full Stack Developer to join a USA-based project and take ownership of building and maintaining third-party integrations on a modern B2B platform. Our product helps businesses make smarter use of their data by connecting external tools — file storage, communication platforms, and project management systems into an AI-powered knowledge layer. You’ll be working with a skilled team on a scalable, high-impact system using up-to-date technologies.

Requirements:
— 1+ years of experience in web development with TypeScript and Node.js across both frontend and backend.
— Strong experience with React, including modern patterns (Server Components, Server Actions, hooks, component architecture).
— Hands-on experience building and consuming REST APIs, including OAuth 2.0 authorization flows (authorization code grant, token refresh, service-to-service auth).
— Working knowledge of relational databases and ORMs (we use PostgreSQL and Prisma).
— Experience with background job processing, task queues, or worker-based architectures (we use BullMQ with Redis/Valkey).
— Familiarity with Next.js (App Router) or a similar full-stack framework.
— Proficiency with Git and comfort working in a monorepo (pnpm + Turborepo).
— Strong problem-solving skills and attention to detail — integration work requires debugging across multiple systems and APIs.
— A proactive, organized, and independent approach to work. You’ll own features end-to-end, from database schema to UI.
— Upper-intermediate or higher English proficiency, enabling effective communication within an international team.

Nice to have:
— Familiarity with third-party APIs.
— Experience with AI/LLM integrations or working on AI-adjacent products.
— Familiarity with OpenTelemetry, structured logging, or observability tooling.

Responsibilities:
— Design, build, and maintain third-party integrations end-to-end: OAuth flows, API route handlers, database models, background sync workers, and admin/user-facing configuration UIs.
— Implement reliable data crawling and synchronization pipelines that run as background tasks, handling rate limiting, pagination, error recovery, and incremental sync.
— Work with PostgreSQL (Prisma) to design schemas for integration credentials, sync state, and external resource mappings.
— Build admin setup flows and user-facing integration pages using React, Next.js Server Components.
— Collaborate with the team on architecture decisions for new integrations.
— Ensure production reliability through proper error handling, OpenTelemetry instrumentation, and structured logging.
— Contribute to shared packages in our monorepo — integrations library, server actions, operations queue, and UI components.

Interview stages:
— HR interview (30 minutes).
— Technical interview (1 hour).
— Interview with the customer (1 hour).
— Job offer 🎉🎉🎉

We offer:
— Competitive salary.
— Challenging tasks and projects.
— Opportunities for professional development and growth.
— Flexible working hours.
— New hardware.
— Free English lessons.
— Table tennis and yoga classes.
— Availability of generators and Starlinks in the office.
— Small gym in the office.
— Adjustable height tables.
— Regular office fruit delivery and other benefits.

Let’s create value together!

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Senior Fullstack Developer (Technical Consultant) to join our team and help design, build, and scale modern web products across fintech, AI, telecommunications, healthcare, automation, and other fast-growing domains.

This role is ideal for an engineer who is equally confident working across frontend and backend development, participates in hands-on implementation, and contributes to architecture, technical planning, and consulting-driven engineering decisions.

Responsibilities

• Design, develop, and maintain scalable frontend and backend solutions for modern web applications 
• Build and improve user-facing features, APIs, integrations, and business logic 
• Participate in architecture design, technical planning, and engineering decision-making 
• Develop responsive, maintainable, and scalable frontend applications using modern frameworks and reusable component architecture 
• Build reliable backend services, APIs, and integrations using scalable backend technologies and integration patterns 
• Work with databases, external services, and third-party platforms 
• Collaborate closely with product, design, QA, DevOps, and engineering teams 
• Improve system performance, maintainability, scalability, security, and user experience 
• Participate in and lead code reviews, technical discussions, and engineering best practices initiatives  
• Diagnose and resolve complex issues in products and production environments 
• Transform product requirements into practical technical solutions and architectural decisions 
• Contribute to long-term technical strategy and platform evolution 

Requirements

• Strong commercial experience as a Fullstack Developer with hands-on work across both frontend and backend systems 
• Strong knowledge of modern JavaScript and/or TypeScript 
• Experience with frontend frameworks such as React, Next.js, Vue, or similar technologies 
• Understanding of frontend architecture, state management, and scalable UI patterns 
• Experience developing backend services and APIs using Node.js/TypeScript, Java, .NET, or similar backend technologies 
• Strong understanding of REST APIs, integrations, authentication, and client-server architecture 
• Experience working with relational and/or NoSQL databases 
• Understanding of software architecture principles, component-based design, and maintainable application structure 
• Experience with cloud platforms such as AWS, GCP, or Azure 
• Experience with Docker, testing, debugging, Git, and CI/CD pipelines 
• Ability to work independently, make technical decisions, and clearly communicate trade-offs and architectural choices 
• Strong problem-solving skills with a focus on reliability, maintainability, and production quality 
• English level: B2 or higher 

Nice to Have

• Familiarity with Kubernetes and modern deployment workflows 
• Experience with GraphQL, messaging systems, or event-driven architecture 
• Understanding of frontend performance optimization and modern rendering approaches 
• Understanding of performance optimization, observability, and production support practices 
• Experience with design systems, frontend architecture, or scalable UI platforms 
• Familiarity with AI products, data-intensive systems, or third-party platform integrations 
• Experience participating in technical consulting, solution design, or tech leadership initiatives 

What We Offer

• Work on real-world products across multiple industries and domains 
• Opportunity to participate in technical discovery, architecture, and solution design 
• Collaboration with strong engineers, tech leads, architects, and product teams 
• Clear growth path toward Tech Lead, Solution Architect, or Engineering Lead roles 
• Open engineering culture focused on ownership, transparency, and continuous improvement 
• Long-term projects, flexible schedule, and fully remote work opportunities

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Senior Java Developer (Technical Consultant) to join our team and help build scalable, high-performance backend systems for fintech, AI, telecommunications, healthcare, and other high-load domains.

This role combines hands-on backend development with participation in architecture design, technical planning, and a consulting-driven approach to building reliable, scalable, and maintainable systems.

Responsibilities

• Design and develop scalable backend services and microservices using Java 17/21, Spring Boot, and Spring Cloud 
• Participate in architecture design, technical planning, and engineering decision-making 
• Build event-driven systems using Kafka or RabbitMQ and develop REST or GraphQL integrations 
• Improve system performance, scalability, reliability, and maintainability 
• Optimize application performance, database interactions, and backend processing flows 
• Collaborate closely with DevOps, QA, product, and engineering teams 
• Participate in code reviews and contribute to engineering best practices 
• Diagnose and resolve issues in production environments 
• Participate in technical discussions with clients and stakeholders when needed 
• Provide technical guidance, architectural recommendations, and mentorship 

Requirements

• Strong commercial experience with Java and Spring Boot/Spring Cloud 
• Strong experience designing and building microservices, REST APIs, and distributed systems 
• Strong understanding of software architecture principles and integration patterns 
• Experience with PostgreSQL or MySQL and Hibernate/JPA 
• Experience with Kafka, RabbitMQ, or other messaging systems 
• Experience optimizing application performance, scalability, and database interactions 
• Experience with Docker and CI/CD pipelines 
• Experience with at least one cloud platform such as AWS, GCP, or Azure 
• Strong debugging, troubleshooting, and problem-solving skills 
• Ownership mindset and responsibility for technical solutions and delivery quality 
• Ability to communicate technical decisions clearly to both technical and non-technical stakeholders 

Nice to Have

• Experience with Redis, Elasticsearch, or GraphQL 
• Knowledge of Kubernetes or Terraform 
• Experience working with high-load systems, caching, and observability tools such as Prometheus, Grafana, or ELK 
• Familiarity with event-driven architecture and asynchronous communication patterns 
• Experience participating in technical consulting, solution design, or system modernization initiatives  

What We Offer

• Work on real-world projects in fintech, AI, telecommunications, healthcare, and other modern domains 
• Opportunity to influence architecture and technical decisions 
• Clear growth path toward Tech Lead or Architect roles 
• Open engineering culture with transparent processes and strong technical collaboration 
• Flexible schedule and fully remote work opportunities

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Java Developer to join our backend team and contribute to building scalable, high-performance, and reliable microservices for modern products across fintech, AI, telecom, healthcare, and other high-load domains.

Responsibilities

• Design, develop, and maintain scalable backend microservices and APIs.
• Write clean, efficient, and well-tested code using Java (17/21) and Spring Boot.
• Work with event-driven architectures using tools like Kafka or RabbitMQ.
• Integrate with internal and external REST/GraphQL services.
• Collaborate closely with DevOps, QA, and product teams to deliver high-quality features.
• Participate in code reviews and help establish engineering best practices.
• Optimize backend systems for performance, reliability, and cost efficiency.

• Investigate and resolve production issues, contributing to CI/CD and observability improvements.

   

Requirements

• Strong knowledge of Java and hands-on experience with Spring Boot / Spring Cloud.
• Experience building REST APIs, microservices, and integrations.
• Solid understanding of relational databases (PostgreSQL/MySQL) and ORM frameworks (Hibernate/JPA).
• Familiarity with Docker, containerization, and CI/CD pipelines.
• Knowledge of software architecture principles: microservices, event-driven systems, clean architecture.
• Experience with Git, unit testing (JUnit), and debugging/profiling tools.

• Good problem-solving skills and ability to work in a fast-paced environment.

   

Nice to Have

• Experience with cloud platforms (AWS, GCP, Azure).
• Knowledge of Kafka, Redis, Elasticsearch, or GraphQL.
• Experience with Kubernetes, Helm, or Terraform.
• Understanding of caching strategies, messaging patterns, and high-load system design.
• Experience with performance tuning, monitoring (Prometheus/Grafana), and observability tools (ELK).

• Familiarity with ML/AI integrations or data pipelines.

   

We Offer

• Real-world projects in fintech, AI, telecom, and automation industries.
• Mentorship from senior engineers, tech leads, and architects.
• Personal development plan and a clear path toward Senior Java Engineer or Backend Architect roles.
• Access to internal workshops, best practices, and structured feedback.
• A collaborative engineering culture focused on transparency and continuous improvement.
• Long-term projects, flexible schedule, and a remote-friendly work environment.

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability
 

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability

Project overview:

Group107 is building a dedicated AI Unit to drive automation across the company and deliver AI-powered solutions for client projects.

We are hiring Junior AI Developers who think fast, learn faster, and are already productive with modern AI-assisted development workflows.

You will work directly under the Tech Director and grow into autonomous AI engineers capable of owning full delivery pipelines.

Requirements:

• 1+ year of hands-on software development experience (commercial or substantial personal projects)
• Demonstrable proficiency with AI coding tools: Claude Code, Cursor, GitHub Copilot, or equivalent
• Working knowledge of at least one: TypeScript/JavaScript or Python
• Experience deploying web applications (Vercel, Netlify, or similar)
• Understanding of LLM fundamentals: prompting, context windows, token management, tool use
• Ability to read, debug, and refactor AI-generated code critically — not just accept output blindly
• Git proficiency and basic CI/CD awareness
• Strong English communication (both written and spoken)
   

Nice to have:

• Experience with v0, Bolt, Lovable, Replit Agent, or similar AI app builders
• Familiarity with MCP (Model Context Protocol) and agentic AI patterns
• Contributions to open-source AI tools or published AI-related content
• Experience with RAG pipelines, vector databases, or embeddings
• Backend experience with Node.js, Next.js, or FastAPI
• Understanding of DevOps basics: Docker, serverless functions, edge computing
   

Responsibilities:

• Build internal automation tools and workflows using AI coding assistants (Claude Code, Cursor, Copilot)
• Develop and ship AI-powered features and full applications for client projects
• Prototype rapidly using vibe-coding methodology — prompt-driven development with AI pair-programming
• Integrate LLM APIs (Anthropic, OpenAI, open-source models) into production systems
• Deploy and maintain applications on modern platforms (Vercel, Cloudflare, AWS)
• Create and manage AI agents, MCP servers, and tool-use pipelines
• Evaluate, benchmark, and select AI models and tools for specific use cases
• Document solutions, write technical specs, and contribute to the internal knowledge base
  
  We offer:
• 20 vacation days (workdays)
• 7 sick days
• Personalized career growth
• Education reimbursement
• Corporate events and team buildings
• Equipment provided

About Us:

Atto Trading is a dynamic quantitative trading firm at the forefront of global high-frequency strategies. We are seeking a C++ Software Engineer to join our growing team. 

This position is open for relocation for in-office presence to Lisbon, Portugal or remote work from Ukraine, with in-office presence in Kyiv required once circumstances allow.

We are expanding an international, diverse team, with experts in trading, statistics, engineering, and technology. Our disciplined approach combined with rapid market feedback allows us to quickly turn ideas into profit. Our environment of learning and collaboration allows us to solve some of the world’s hardest problems, together. As a small firm, we remain nimble and hold ourselves to the highest standards of integrity, ingenuity, and effort. 


What You’ll Do:

• Design and deploy performance-critical components for large-scale trading infrastructure.
• Develop high-frequency trading (HFT) systems in C++ with an emphasis on low latency and reliability.
• Write modern, efficient code using the latest C++ standards.
• Interface directly with cutting-edge networking hardware via kernel-bypassing drivers.
• Conduct performance research to push the boundaries of our platform's speed and scalability.
  
   

What We’re Looking For:

• 3+ years of hands-on experience with C++ development.
• Deep understanding of C++ standards (C++14, C++17; C++20 is a strong plus).
• Hands-on experience with Python and/or Bash scripting.
• Proficiency with Linux environments and system-level programming.
• Solid grasp of multithreading, IPC, and concurrent systems.
• Strong skills in latency and throughput optimization, including experience with profiling and PGO.
• Knowledge of OOP and software design patterns.
• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field.
• Excellent attention to detail, with a critical and quality-focused mindset.
• Comfortable working independently or in small teams in a dynamic, high-speed environment.
• Strong communication skills and upper-intermediate (or higher) English proficiency.
• Curiosity and passion for financial markets and trading.
  
   

Nice to have:

• Experience developing high-performance, low-latency systems on Linux.
• Familiarity with OS internals and kernel-level networking.
• Understanding of financial instruments such as stocks, ETFs, futures, or options.
• Protocol-level networking knowledge (TCP/UDP/IP stack insights are a plus).

What we Offer:

• Competitive compensation package
• Performance-based bonus opportunities
• Healthcare & Sports/gym budget
• Mental health support, including access to therapy
• Paid time off (25 days)
• Relocation support (where applicable)
• International team meet-ups
• Learning and development support, including courses and certifications
• Access to professional tools, software, and resources
• Fully equipped workstations with high-quality hardware
• Modern office with paid lunches

Our motivation:

We are a company committed to staying at the forefront of technology. Our team is passionate about continual learning and improvement. With no external investors or customers, we are the primary users of the products we create, giving you the opportunity to make a real impact on our company's growth.

Ready to advance your career? Join our innovative team and help shape the future of trading on a global scale. Apply now and let's create the future together!

About Us:

Atto Trading is a dynamic quantitative trading firm at the forefront of global high-frequency strategies. We are seeking a C++ Software Engineer to join our growing team. 

This is a remote-first position based in Ukraine, with occasional in-office presence in Kyiv expected when conditions permit.

We are expanding an international, diverse team, with experts in trading, statistics, engineering, and technology. Our disciplined approach combined with rapid market feedback allows us to quickly turn ideas into profit. Our environment of learning and collaboration allows us to solve some of the world’s hardest problems, together. As a small firm, we remain nimble and hold ourselves to the highest standards of integrity, ingenuity, and effort. 


What You’ll Do:

• Design and deploy performance-critical components for large-scale trading infrastructure.
• Develop high-frequency trading (HFT) systems in C++ with an emphasis on low latency and reliability.
• Write modern, efficient code using the latest C++ standards.
• Interface directly with cutting-edge networking hardware via kernel-bypassing drivers.
• Conduct performance research to push the boundaries of our platform's speed and scalability.
  
   

What We’re Looking For:

• 3+ years of hands-on experience with C++ development.
• Deep understanding of C++ standards (C++14, C++17; C++20 is a strong plus).
• Hands-on experience with Python and/or Bash scripting.
• Proficiency with Linux environments and system-level programming.
• Solid grasp of multithreading, IPC, and concurrent systems.
• Strong skills in latency and throughput optimization, including experience with profiling and PGO.
• Knowledge of OOP and software design patterns.
• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field.
• Excellent attention to detail, with a critical and quality-focused mindset.
• Comfortable working independently or in small teams in a dynamic, high-speed environment.
• Strong communication skills and upper-intermediate (or higher) English proficiency.
• Curiosity and passion for financial markets and trading.
  
   

Nice to have:

• Experience developing high-performance, low-latency systems on Linux.
• Familiarity with OS internals and kernel-level networking.
• Understanding of financial instruments such as stocks, ETFs, futures, or options.
• Protocol-level networking knowledge (TCP/UDP/IP stack insights are a plus).

What we Offer:

• Competitive compensation package
• Performance-based bonus opportunities
• Healthcare & Sports/gym budget
• Mental health support, including access to therapy
• Paid time off (25 days)
• Relocation support (where applicable)
• International team meet-ups
• Learning and development support, including courses and certifications
• Access to professional tools, software, and resources
• Fully equipped workstations with high-quality hardware
• Modern office with paid lunches

Our motivation:

We are a company committed to staying at the forefront of technology. Our team is passionate about continual learning and improvement. With no external investors or customers, we are the primary users of the products we create, giving you the opportunity to make a real impact on our company's growth.

Ready to advance your career? Join our innovative team and help shape the future of trading on a global scale. Apply now and let's create the future together!