Jobs Backend

We are seeking a highly skilled Node.js expert, who excels as a collaborative team member. The role goes beyond coding, encompassing responsibilities such as handling feature aspects, specifications, technical design, development, testing, documentation, and maintenance.

Customer:

Our client has rapidly become one of Europe’s most swiftly expanding FinTech companies. They oversee all aspects of financial operations, from generating virtual cards to facilitating wire transfers and maintaining customer account balances. As a payment institution, our client provides a platform that integrates financial services into its product, offering features such as account management, card payments, bank transfers, and additional services.

Requirements:

• Over 5 years of experience in Back-end software development
• At least 3 years of experience with TypeScript
• Over 4 years of experience working with Node.js
• Strong experience in designing distributed and secure systems
• Good Front-end development skills
• Good understanding of microservices architectures
• Experience in designing, building, and maintaining APIs
• Experience in building and consuming REST and/or GraphQL APIs
• Familiarity with DevOps practices
• Strong experience working with AWS
• Good knowledge of testing best practices
• At least an Upper-Intermediate level of English

Responsibilities:

• Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on React and Node.js
• Keep consistently high level of quality throughout all stages of the development
• Communicate effectively to actively collaborate with the team and get context for complex tasks
• Follow best engineering practices and company and client guidelines
• Play supervisory, advisory, and coaching roles for less-experienced engineers on the team
• Promote clean code and design patterns and principles

About Us:

LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Senior Backend Develope to join a long-term product project.

You will become part of the Smart City ecosystem - a large-scale software product for the Middle East market. This is a fully agile, product-oriented environment with real users and a tangible impact on urban infrastructure.

Key Responsibilities:

• Architect and develop robust backend applications using Node.js and NestJS in a monorepo and microservices environment.
• Design, implement, and manage highly scalable database solutions using PostgreSQL (AWS RDS) and caching strategies with Redis.
• Develop and maintain integrations with various AWS services including SQS, S3, Lambda, IAM, System Manager, EC2, and EKS/ECS for cloud-native applications.
• Manage and optimize containerization and deployment processes with Docker, including building and pushing to registries, and implementing CI/CD pipelines using GitLab runners.
• Implement monitoring and observability using Prometheus and Grafana to ensure system reliability and performance.
• Collaborate with stakeholders to gather business requirements and translate them into technical solutions, driving discussions at the architecture and implementation levels.
• Lead troubleshooting and debugging efforts to resolve complex backend issues and optimize system performance.
• Stay current with the latest technologies and best practices, and promote continuous learning and self-development within the team. Mentor other team members, providing guidance and sharing your knowledge.
• Participate in the agile development process, contributing to scram events, fostering a collaborative and cross-functional team environment.
• Development and maintenance of a high-level engineering culture within the team.

Qualifications:

• Minimum of 5 years of experience in backend development with strong proficiency in Node.js, NestJS, and related technologies.
• Expertise in building and managing microservices architectures and a monorepo setup.
• Extensive experience with PostgreSQL (AWS RDS), Redis, and other backend data storage and caching technologies.
• Strong proficiency in AWS cloud services including but not limited to SQS, S3, Lambda, IAM, EC2, and EKS/ECS.
• Solid understanding of Docker, CI/CD pipelines, and experience with GitLab runners.
• Experience with monitoring tools such as Prometheus and Grafana.
• Proven ability to document backend architectures, designs, and processes clearly and comprehensively.
• Excellent problem-solving skills and attention to detail, with a passion for creating high-quality, performant code.
• Ability to work effectively both independently and as part of a team in an agile environment.
• Strong communication skills with the ability to interact professionally with stakeholders at all levels.
• English at Upper-Intermediate level and above.

What We Offer:

• A collaborative and innovative work environment.
• Professional development opportunities.
• The chance to work on exciting and challenging projects.
• A supportive company culture.

Numerical Technologies LTD is a leading provider of custom software solutions and services specializing in risk, limits, and regulatory capital. Right now, we are looking for a Python Developer to join our team.
 

What will you be doing?

As part of the team, you will be participating in a project with a large US bank. You will be helping us develop new software features and support and maintain the existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with third-party web services. You will be working closely with the client and product manager to understand the system’s functional and non-functional requirements, and contribute to code quality through unit testing, integration testing, code review, and system design using Python to build robust software that aligns with the client’s business needs.
 

What are we looking for:

◼ A strong programming background with Python and OOP skills.

◼ Proficiency with SQL (Postgres, SQLite) and NoSQL (MongoDB) databases.

◼ Deep understanding of algorithms and data structures.

◼ Experience with FastAPI and Linux environments.

◼ Strong problem-solving skills and ability to collaborate effectively in a team environment.

◼ Familiarity with LangChain is a plus.
 

What we offer:

◼ Competitive compensation depending on experience and skills.

◼ Regular assessments and salary reviews.

◼ Paid personal days.

◼ Health insurance.

◼ Mental health support program.

◼ English/Polish/Spanish language classes.

◼ Flexible working schedule.

Mandatory Skills
- Minimum 3+ years of hands-on Python backend development experience in production environments
- Strong Python fundamentals (clean code practices, typing discipline (where used), debugging, and performance awareness)
- Experience building web APIs with a modern framework (FastAPI) and designing maintainable endpoints
- Strong understanding of API patterns (authentication/authorization basics, input validation, pagination, versioning, consistent error contracts)
- Solid database experience (PostgreSQL preferred - schema design, migrations, indexing, query optimization, transaction basics
- Experience with asynchronous/background processing and handling retries
- Experience writing tests (pytest or similar): unit + integration tests, mocking, test data strategy
- Familiarity with production-grade practices (logging, monitoring basics, configuration management, secure secrets handling)
- Ability to detect, analyze, and resolve issues in production systems
- Comfortable doing root-cause analysis
- Ability to work independently in a remote setup with proactive, clear communication.

Responsibilities:
- Build and ship backend features for Obriy AI / SURE platform - APIs, services, and workflow components that power automation, integrations, and knowledge modules
- Design, implement, and maintain clean, well-documented REST APIs (and internal service interfaces) with strong validation and error handling
- Integrate with external systems (CRMs, support tools, messaging channels) using stable adapters, retries, and safe failure handling
- Implement background processing and asynchronous workflows (queues, schedulers) for long-running tasks and integrations
- Maintain and improve data models and persistence: schema changes, migrations, query performance, data consistency
- Improve reliability and observability: structured logging, metrics, tracing, alerts, and practical runbooks
- Troubleshoot production issues, perform root cause analysis, and deliver robust fixes with minimal regression risk
- Write and maintain automated tests (unit/integration) and support QA with clear test scenarios and reproducible cases
- Participate in code reviews, contribute to backend best practices, and keep engineering documentation up to date
- Collaborate closely with Frontend, DevOps, and Product teams to refine requirements, estimate work, and deliver iteratively.

Nice to have: 
- Experience with LLM/GenAI integrations (OpenAI-compatible APIs), prompt orchestration, tool-calling patterns, and safety considerations
- Familiarity with RAG pipelines (embeddings, vector databases, document chunking, retrieval quality evaluation)
- Experience designing integration connectors 
- Knowledge of event-driven architecture (Kafka/RabbitMQ/NATS) and distributed systems concepts
- Experience with Docker and Kubernetes-based deployments (understanding runtime constraints and observability)
- Familiarity with security best practices: OAuth/OIDC, RBAC/permissions modeling, audit logs, data protection principles
- Experience with performance tuning: profiling, caching strategies (Redis), async I/O optimization
- Experience working in B2B SaaS / enterprise environments with reliability and compliance expectations.

Want to work at the cutting edge of modern technology and artificial intelligence? We have something just for you.

We are looking for a Node.js engineer who is not only confident in backend development but also has a genuine interest in AI integrations, LLM agents, and new automation technologies. This role involves participating in the creation and development of AI assistants, platforms, and interfaces that help businesses be more efficient.

What to expect:

• Regular technical challenges — a new case from a customer every week
• Flexible use of AI tools (OpenAI API, WhatsApp/Telegram API, OCR, N8N, scrapers)
• Hands-on experience with workflow automation platforms, particularly N8N, for creating complex business process automations
• Building end-to-end AI workflows that connect multiple services and APIs
• Opportunity to experiment with emerging AI technologies and automation tools as they become available

Our main requirements are:

• Experience in hands-on programming 3+ years
• Experience doing Node.js (Vanilla/Typescript)
• Experience with NestJS also and/or NextJS and/or Express
• Strong creating with SQL/NoSQL databases efficient design from scratch as well as performing optimizations
• Strong knowledge in Computer Science: data types, data structures, algorithms
• Being proficient working on modern tech stack: Docker, Kubernetes, CI/CD, IaC (e.g. Terraform), Ansible etc.
• Having a wide strong background working with AWS (smth beyond EC2 and S3)
• Understanding and applying software design principles
• Experience designing software systems (distributed, high availability, resilient)
• Comfortable working Agile and Design Thinking (however understanding that pure Agile is a myth)
• Being comfortable in several projects at once (taking apart hands-on aspect)
• Strong communication skills in English (B2 and better)
• Willingness and enthusiasm to learn workflow automation tools (especially N8N) and adapt to rapidly evolving AI technologies

Will be considered as a plus:

• Experience with modern SPA frameworks like React/Vue.js/Angular
• Experience with NestJS
• Experience writing technical documents, tracking technical debt, understanding refactoring etc.
• Experience working with AI libraries and/or 3rd parties like chatGPT, Claude, Gemini or Perplexity
• Previous exposure to workflow automation platforms (N8N, Zapier, Make.com, or similar)
• Experience with RAG implementations, vector databases, or knowledge management systems
• Familiarity with MCP (Model Context Protocol) or similar AI integration standards
• Understanding of prompt engineering and AI agent behavioral design
• Experience building conversational AI interfaces or chatbots

Hiring process:

• HR interview: we’ll talk about your professional background, the specifics of the position we are offering, and address any questions you might have.
• Tech interview: a deeper look into your technical expertise and problem-solving approach, ensuring your skill set aligns with our project’s needs.
• Interview with the C-Level: a conversation focused on the company’s vision, strategic goals, and how your role aligns with them.
• Feedback
• Job offer

What we offer at MindTech:

• Hardware Policy: Get the gear you need, from laptops to PCs.
• Referral Bonus: Invite talent and earn a generous reward.
• Professional Growth: We cover courses and books to fuel your expertise.
• Tasty Perks: Free lunches, snacks, tea, and coffee to stay energized.
• Birthday & Celebrations: Gifts on your day, plus parties and team-building.
• Life Events Support: Wedding bonuses, childcare support, and more.
• Volunteering Days: Extra days off to help your community.
• Work-Life Balance: 18 paid vacation days, 10 paid sick days, and national holidays off.

Our client is the leading SaaS provider of independent, highly automated financial aid management software solutions, supporting diverse enrollment models for higher education institutions in the U.S. Their solutions integrate with established student information systems, helping institutions improve efficiency, reduce errors, grow new programs, and deliver enhanced financial aid services for students.

This position is to join the client's Product Development team, which delivers high-quality products using a fast-paced Agile development model. The Software Engineer will contribute to the design, implementation, and testing of multiple SaaS products for the higher education market. 
Specifically, you will:

• Develop and maintain features using C#, ASP.NET MVC, and .NET Core;
• Build and maintain RESTful APIs with ASP.NET Web API;
• Write and optimize SQL Server queries and stored procedures;
• Collaborate with team members to design functional and technical specifications;
• Develop and automate unit tests;
• Troubleshoot and resolve software defects efficiently;
• Communicate proactively with team members to clarify requirements and prevent delays;
• Think creatively and thrive in a fast-paced, collaborative environment.

Required Skills and Experience:

• Strong experience with C#, ASP.NET MVC, and ASP.NET Web API;
• Solid understanding of RESTful API design principles and best practices;
• Strong SQL Server experience, including queries and stored procedures;
• Proficiency in JavaScript and modern frontend development;
• Experience developing software products with complex business rules;
• At least 5 years of professional software development experience;
• Demonstrated problem-solving skills and ability to work effectively in a fast-paced environment;
• Excellent communication skills and a proactive, team-oriented approach;
• Attention to detail and a commitment to high-quality work;
• Willingness to follow established policies, including time tracking, timely communication, and providing notice for planned time off;
• Ability to work occasional overtime and participate in on-call coverage, including weekends if required.

Nice-to-Have Skills:

• ReactJS, Kendo UI, Node.js;
• Docker, Kubernetes, MongoDB;
• .NET 10 / .NET Core experience.

We offer:

• Competitive market salary;
• Fully remote work;
• Convenient and somewhat flexible work hours (you will have to work until 20:00 Kyiv time GMT+3, or 1 pm EST);
• 28 days of paid time off per calendar year;
• Working on a very socially valuable product, alongside a highly professional, US-based, international team;
• Interesting challenges and the ability to grow and learn.

The client is an innovative global fintech leader behind USDT, the world’s largest and most widely used stablecoin.

We are looking for a Senior Backend Engineer with strong expertise in blockchain and crypto infrastructure to design, build, and scale high-performance backend systems interacting with EVM-based networks. This role focuses on blockchain integrations, transaction processing, distributed systems, and secure financial infrastructure at global scale.

Responsibilities:

• Design, build, and maintain scalable backend services using Node.js (JavaScript/TypeScript)
• Develop and optimize blockchain integrations with EVM-compatible networks
• Implement Web3-based interactions (smart contract calls, transaction signing, event indexing)
• Build secure services for transaction processing, wallet operations, and balance tracking
• Integrate with RPC providers, blockchain nodes, and third-party crypto services
• Design event-driven and distributed architectures for high-load financial systems
• Optimize gas usage, transaction batching, and on-chain/off-chain communication
• Implement monitoring, logging, and alerting for blockchain infrastructure
• Ensure security best practices in key management, signing flows, and API protection
• Write production-grade, well-tested code (unit, integration, load tests)

• Collaborate with product, DevOps, and security teams in a fully remote environment

   

Requirements:

• 7+ years of backend development experience
• Strong proficiency in JavaScript / TypeScript
• Deep experience with Node.js in production environments
• Hands-on experience with Web3 libraries (ethers.js, web3.js, viem, etc.)
• Strong understanding of EVM architecture and smart contracts
• Experience designing scalable distributed systems
• Strong understanding of security best practices in crypto environments

• Hands-on experience with Docker and containerized environments

   

  We are offering:

• Transparent strategy and thoughtful management that keep everyone aligned
• Space for personal growth and career development without limits
• A culture of continuous learning: internal courses, workshops, and English classes twice a week
• Skill up events where we share experience and stay on top of trends
• Competitive perks: flexible schedule, a strong compensation package, support for professional certifications, and generous vacation policy
• Team spirit that thrives through regular events, gatherings, and celebrations

😊 About us
 

ZentixSoft is a young British-Ukrainian full-cycle IT company where we value People over processes. We need a "logic wizard" who can bridge the gap between human intent and strict algorithmic execution.
 

📝 About the project & conditions

This is a unique challenge: you will design a system that takes user intent (JSON) and mathematically generates error-free C# (NinjaScript) and C++ (MQL5) source code. You don't need to be a Wall Street quant, but you must love solving complex logical puzzles and building systems that require absolute precision.
 

• Format: Full-time, Outstaff
• Location: 100% Remote.
• Duration: Long-term.

• Start: ASAP.

   

😉 What we expect from you

• 💎 Node.js Expert: 5+ years in software development with a focus on complex backend architecture (NodeJS/TypeScript).
• 📈 Trading Platform Expertise: Deep hands-on experience with MQL5 (MetaTrader 5) or  NinjaScript (C#-based for NinjaTrader). You must understand their specific syntax and execution environments.
• 🧠 Compiler Theory: Solid understanding of lexing, parsing, Abstract Syntax Trees (AST), and code generation principles.
• 🏗️ "Meta-Programming" Mindset: Experience building tools that generate other code, rule engines, or complex state machines.
• ⚙️ Strict Logic: You understand that "floating point math" is tricky in trading. You write defensive, deterministic, and memory-efficient code.
• 🌍 English: Intermediate Strong (clear technical communication).
   

🚀 Your responsibilities

• NL-to-Code Conversion: Design the core logic for translating natural language into functional MQL5 and NinjaScript code.
• System Architecture: Establish the backend architecture using Node.js for core services.
• Quality & Validation: Ensure the generated code is syntactically perfect, secure, and optimized for live trading environments.
• Research: Stay at the forefront of automated trading and LLM-driven code generation.
   

🌟 Would be a big plus

• 🦀 Rust: Experience with Rust for building high-performance conversion engines.
• 🤖 LLM Integration: Experience working with LLMs for code generation and fine-tuning.
• ☁️ Cloud & Data: Hands-on with AWS (Serverless, Aurora RDS, PostgreSQL).
   

✨ What awaits you at ZentixSoft

• 📈 Professional Growth. Individual development plans for your career path.
• 💵 Salary Review. A structured policy to ensure your compensation grows.
• 🎓 Knowledge Sharing. Access to workshops and internal training.
• 🗣️ English. We fully cover classes with a teacher.
• ⚖️ Work-Life Balance. We work without overtime and respect your personal time.
• 🦾 Trust. Zero micromanagement — only freedom in making technical decisions.
  
  📩 If you love solving complex logical puzzles and building systems that "write code" — send your CV!

Who we are looking for
a skilled Python Engineer to join our team, building intelligent, secure, and scalable solutions. 

Important!
This role involves regular travel to the Netherlands to collaborate closely with the client, run in-person consulting sessions at the WeAreBrain office in Amsterdam, and occasionally visit the client’s office. Candidates must have the flexibility and ability to travel within Europe. 

Tech Stack
— Python 3.9+, FastAPI, Flask, PydanticAI, LangChain
— SQLAlchemy, PostgreSQL, SQLite, MongoDB, Redis, Kafka
— PaddleOCR, Tesseract, custom NLP models
— Docker, Kubernetes, GitHub Actions
— React, Tailwind, Keycloak (frontend)
— Microsoft Graph API, OAuth2/MSAL (integration)

Responsibilities
— Develop, test, and maintain Python microservices and agentic AI workflows
— Implement document intelligence features (OCR, NLP, LLM integration)
— Collaborate with frontend, DevOps, and legal teams to deliver seamless solutions
— Write clean, readable, and well-documented code using type hints and Pydantic models
— Participate in code reviews and contribute to continuous improvement
— Ensure system stability, security, and compliance (AVG/GDPR)
— Research and prototype new technologies (LLMs, OCR, cloud-native patterns)
— Support CI/CD, testing, and deployment automation

Qualifications
— 5+ years of professional Python experience, ideally with microservices or AI/NLP projects
— Experience with FastAPI, Pydantic, SQL/NoSQL databases, and cloud infrastructure
— Familiarity with Docker, Kubernetes, and GitHub Actions
— Understanding of REST APIs, authentication (OAuth2, JWT), and security best practices
— Experience with frontend integration (React, Keycloak) and Microsoft 365 APIs is a plus
— Good communication and collaboration skills; fluent English (C1)
— Bachelor’s degree in Computer Science, Software Engineering, or related field
— Experience with testing frameworks (Pytest, etc.)
 

What we offer

• Flexible working conditions
• Competitive salary depending on your experience with a comprehensive benefits package, which includes a monthly €50 stipend to cover work-from-home expenses, and an allocation of 25 vacation days.
• After one year, WeAreBrain offers access to a Team Reward Program for all employees.
• Innovative Exploration: Seize the chance to pioneer your department, venturing into uncharted territories, and experimenting with fresh ideas that push boundaries.
• Entrepreneurial: Immerse yourself in a true entrepreneurial environment where every team member is an owner.
• Office Perks: We organise lunch in the office and have monthly gatherings for drinks and bites, fostering our team spirit.
• Remote Work Flexibility: Our team has the freedom to work remotely, allowing you to achieve a healthy work-life balance that suits your preferences.
• Professional Growth: We value your growth. Take advantage of diverse opportunities and resources designed to nurture your professional development.
• A creative and dynamic work environment.

Description

The client is a global leader in the manufacturing of elevators, escalators, and moving walkways.
Their solutions transport more than 1.5 billion people every day across buildings and major transportation hubs worldwide.

Join us to create innovative solutions for smart elevators, buildings, and cities.

Requirements:

• Practical experience in C#
• Good knowledge of OOP principles
• Experience with Git and Bitbucket
• Intermediate spoken and written English
• Basic knowledge of terminal commands for Linux (mandatory) and Windows (would be a plus)
• Write unit tests using the NUnit framework

Job responsibilities:

• Develop PoC (Proof of Concepts) in the Elevator and IoT domain
• Develop individual modules for the commercial applications
• Demonstrate the ability to independently research and find the necessary information to solve technical challenges
• Learn and apply new tools, technologies, and methods as required by the project.
• Join the team of experts

Suplery is looking for a backend developer to create and develop one of the company's products. We are developing a B2B solution that optimizes the ordering of professional cosmetics from suppliers to beauty salons, clinics and stores and reduces supplier costs by 30-35%.

Required skills

– 3+ years of experience with .NET Core (C#): ASP.Net Core + Entity Framework Core
– Experience in writing REST APIs
– Knowledge of both LINQ and SQL
– Deep understanding of CLR
– Understanding of how to use AI in development

Important
– Optimization of complex SQL queries
– GitHub actions, Docker
– Google Cloud & Google Cloud API (Storage, Cloud Run, Tasks, Artifact Registry, Secrets Manager)
– Understanding good architecture practices and ability to use them in code.
– Product-oriented. The developer does not just perform the task, but understands the users' problems and finds the optimal solution.
– Ability to ask questions and get to the heart of the problem.
– Ability to argue the decisions made.

Responsibilities
– API design and development
– Development+optimization of data processing and complex SQL queries
– Integrations with external services
– Fixing bugs and optimizing current functionality
– Describing documentation for Swagger

We offer
– Opportunity to influence the product by creating and developing it.
– A friendly team of professionals. No bureaucracy, individual approach and adequate management.
– Professional growth and knowledge sharing in the team.
– Flexible schedule.

About Suplery

Suplery is an order automation and B2B marketplace in professional cosmetics industry.

A direct contract with the product company (PropTech, US).

Work schedule: remote CET business hours.

We’re excited to offer a long-term opportunity for an experienced Back-end Developer (Node.js) to join a team of professional engineers and designers. Together, you’ll be working on a US-based product that’s set to make a significant impact on the PropTech scene. This role offers the chance to contribute to a major market and collaborate with top talent in a dynamic environment.

About ElevateOS Product:

ElevateOS has been improving the resident experience for over seven years. We created a single, all-in-one platform that makes it easy for property managers and resident staff to work together. Our goal is simple: to provide the best experience for residents by replacing multiple, confusing apps with one easy solution.

This is a stable, long-term project that continues to grow, and you'll have the chance to be part of its ongoing success.

Our primary technology stack revolves around JavaScript. We use React for the front-end, Node.js for the back-end, and React Native for mobile development.

Requirements:

- 4-5+ years of development experience with Node.js;

- Practical knowledge of VanillaJS, Typescript, Nest.js;

- Hands-on experience creating robust API’s and designing scalable back-end architecture;

- Experience with managing data and using different types of databases (SQL and non-SQL) for storing and operating on data;

- Experience delivering (even small) projects, using modern tools like CircleCI, Docker, Kubernetes, Swarm and navigating through different environments like AWS, GCP, Digital Ocean.

- Good understanding of ECMAScript specifications;

- Good knowledge of GIT;

- Proficient in English language.

Additional (good-to-have) skills:

- Experience with Microservice Architecture;

- Experience working with AWS.

Responsibilities:

- Creating first-class back-end systems by writing clear, sustainable and well-tested code;

- Improving performance and refactoring existing code;

- Cooperating with the Product, UI/UX, QA and Front-end teams to fulfil project goals;

- Configure project environments and deployment procedures;

- Bugfix during the development process;

- Cover your code with unit tests;

- Write documentation.

We are looking forward to having you on board to contribute to our journey of transforming real estate property management!

We are hiring a Full Stack & Python AI Engineer for an international product company operating globally in the consumer and manufacturing domain. The company is building internal digital platforms focused on automation, data-driven decision-making, and AI-powered workflows used across multiple business units.

The role is part of a long-term initiative to develop and evolve core internal systems that combine modern web applications, real-time communication, and LLM-based features.

You will work across the full stack, owning features end to end, from Angular frontend components to Python backend services and AI integrations.

Responsibilities

• Develop full stack features using Angular 18+ and Python

• Build backend services with Quart (async Flask-style framework)

• Design and maintain REST APIs and WebSocket-based real-time functionality

• Implement AI-driven features using LLMs, embeddings, and RAG pipelines

• Work with vector databases (Qdrant or similar) and MongoDB

• Use Docker for development and deployment workflows

• Improve existing systems, focusing on performance, scalability, and architecture

• Collaborate with engineers and stakeholders on system design and long-term evolution

Requirements

• 7+ years of overall experience as a full stack or backend-focused engineer

• Strong hands-on experience with Python, including Flask or Quart

• Production experience with Angular (project uses Angular 18+)

• Experience building Web APIs and real-time systems

• Hands-on experience with LLMs, embeddings, and text-based AI use cases

• Experience working with MongoDB and SQL databases

• Practical experience with Docker

• Ability to work independently and take ownership of complex systems

• Professional English level

Nice to Have

• Experience with Azure

• Familiarity with LangChain or LangGraph

• Background in enterprise or manufacturing-related systems

• Experience with Django

On behalf with our customer we are seeking for Full Stack Team Lead to join our global R&D department in Poland.

Our customer is an innovative technology company led by data scientists and engineers devoted to mobile app growth. Their proprietary ad platforms powered by machine learning are the outcome of that devotion.
They reward talents, employees support each other to advance individually and as a team.

Responsibilities

● Design, code, and manage large scale, highly available, real-time (low latency) services using cutting edge technologies (Node.js, React, Redis, Kubernetes, etc. over AWS).
● Lead and mentor a team of around 4 members, abroad, and performing code reviews to other team members.
● Work with stakeholders including the Executive, Product, Data, and Design teams to craft the most optimal solutions for our problems.
● Design and develop APIs or integrate with 3rd party APIs
● Manage a time-efficient sprint plan. Plan, groom and manage the present sprint and the upcoming ones with Product
● Understand and implement security and data protection needs, and assist in-house teams and supply creative solutions for various problems.

Requirements

● 7+ years of coding experience in Backend (NodeJS is preferred) and Frontend (One of the popular frameworks; React, Vue, Angular)
● 3+ years of management experience
● Working knowledge with SQL and NoSQL databases
● Working with one of the cloud providers: AWS, Google, Microsoft
● Experience with Kubernetes
● Experience in the software life cycle and knowing how to work in an agile environment
● Can-do attitude, self-sufficient, capable of learning alone and good English

Bonus Skills

● Experience working with offshore contactors
● Experience with web-based SaaS systems
● Experience with Big Data

What We Offer

● Remote work from Poland
● Working schedule Sunday-Thursday - must have
● Accounting support & consultation
● Opportunities for learning and developing on the project
● 20 working days of annual vacation
● 5 days paid sick leaves/days off; state holidays
● Provide working equipment

💎 We’re Hiring: Junior Ruby on Rails Developer

📍 Remote | 🕒 Full-time | 💼 Junior Level | 💰 $500-800

About the Role:
We’re looking for a motivated Junior Ruby on Rails Developer who wants to grow in IT and work on real projects in a supportive team. This is a fully remote, full-time position.

Requirements:
• 6+ months of experience with Ruby on Rails (basic level)
• Understanding of MVC architecture (Models, Views, Controllers)
• Knowledge of CRUD, routes, migrations, validations
• Basic database understanding
• Git basics
• Basic HTML/CSS
• Understanding of REST APIs
• Pet or educational projects (GitHub)
• English level A2+

We Value:
• Strong motivation to work in IT and grow as a developer
• Focus on results, not just tasks
• Responsibility and good communication
• Willingness to ask questions and accept code reviews
• Ability to work with tasks and meet deadlines
• Persistence and problem-solving mindset

What We Offer:
• $500-800 salary range
• Fully covered AI tools
• Free English-speaking club
• Friendly and collaborative team culture
• Room to learn and grow - mentorship from experienced Ruby developers
• 100% remote with flexible hours

📎 To Apply:
Send your CV and GitHub profile

We’re looking for someone who truly wants to build, learn, and grow 🚀