Jobs Backend

Job Description

- 2+ years of Java developing and boostering automated QA systems and associated test strategies.
- Experience working with business-critical customer-facing applications (user interfaces, APIs and back-end services).
- Excellent communication skills with emphasis on writing detail-oriented documents and communications.
- Strong understanding of object-oriented programming concepts.
- Strong understanding of web UI/API and services automation testing (Selenium WebDriver/Selenide, Playwright, RestAssured).
- Experience using BDD approach
- Strong experience with Linux.
- Experience with continuous integration tools, such as Jenkins.
- Shifted working hours 12pm till 8pm EEST timezone

Nice to have:

- Experience with Groovy is a plus
- Experience with the Ad Tech industry.
- Familiarity with clustered computing, distributed and parallel computing concepts.

Job Responsibilities

- Be a creative problem-solver who can draw on an array of expertise and technology to design and implement reliable, scalable and maintainable solutions to challenging problems
- Write production-ready code and unit tests that meet both system and business requirements (Java)
- Respond to feature requests, bug reports, performance issues and ad-hoc questions
- Work collaboratively with multiple teams to deliver quality software
- Support operation of services in production
- Perform code reviews and design reviews

Department/Project Description

Founded in 2007, Magnite’s pioneering technology created a new model for the advertising industry. Today, our automated advertising platform is used by the world’s leading publishers and applications to transact with top brands around the globe enabling them to reach more than 1 billion consumers. Magnite operates the largest independent Display Advertising Exchange and Supply Side Platform that automates the buying and selling of Display Advertising across all formats (banner, video) on all devices (desktop browsers, mobile devices, billboards). Magnite auctions over 20 Billion Ads on a daily basis in real time in less than 1/2 of a second each. Magnite is a publicly traded company (NYSE: RUBI) headquartered in Los Angeles, California, USA.

• One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.
  Product being developed is a cloud solution for interpretation of geological and geophysical data. Project is based on SCRUM methodology.
  Our project is stable, long-term and constantly adopts new technologies such as newest Java and Eclipse RCP versions, cloud and GPU computing, microservices architecture and other innovative frameworks.
  Work supposes close cooperation with Customer team located in Houston and following Agile principles.
  Our team is senior, supportive and friendly.

• Responsibilities:

  • Collaborate closely with geophysicists, data scientists, and software engineers to translate scientific domain requirements into robust on-prem or Cloud software
  solutions.
  • Design, develop, and maintain high-performance applications for geophysical and geological data analysis, interpretation and visualization (e.g., seismic, horizon,
  fault, velocity model, etc.)
  • Present architectural designs and technical proposals to the architecture review board.
  • Ability to break down development tasks and lay out clear implementation roadmaps.
  • Implement and optimize computation algorithms
  • Design and develop both thin and thick client applications that interact with cloud-based microservices.
  • Ensure high code quality through unit testing, code reviews, security hardening and continuous integration with other domain tools
  • Provide technical support and lead user troubleshooting sessions to resolve issues and ensure smooth operation of DSG application.
  • Mentor junior developers and actively contribute to architectural and implementation decisions.
  • Embrace Agile/Scrum methodologies, delivering and demonstrating working solutions at the end of each sprint
  • Stay current with emerging technologies and trends in geophysical computing and software development.

• Mandatory Skills Description:

  6+ years of hands-on Java development experience
  Strong Java Core knowledge
  Experience with desktop development frameworks: Swing, SWT, or Eclipse RCP
  Proven experience designing and building complex systems end-to-end, not just maintaining or extending existing ones
  Practical understanding of multithreaded programming: ability to implement concurrency in code directly, not only through third-party libraries
  Solid knowledge of design patterns and software architecture principles
  Ability to clearly articulate past projects, personal responsibilities, and concrete individual contributions
  Experience working in non-microservices, non-cloud-native development environments (desktop, embedded, or domain-specific platforms)
  Stable career trajectory, no fragmented job history with short tenures

• Nice-to-Have Skills Description:

  C++ development skills
  Practical experience with the Eclipse RCP framework
  OSGi knowledge
  Oil & Gas domain experience

• Languages:
  • English: B2 Upper Intermediate

About us

TeamCraft Roofing (TCR) is a commercial roofing contractor in the US - 300+ employees, projects in 30+ states, Fortune 500 clients. We are building the company's data and AI platform: AI agents in production over live business data, a document-processing service, a storm-response tool for the sales team, plus a data lakehouse and an in-house CRM currently being built.

About the role
You would join the platform team as its dedicated backend engineer, working directly with the core engineering team. The core of the role is the layer connecting our business systems, the data lakehouse, and the AI agents. It's a backend-first role - frontend is a small share of the work, but you shouldn't be blocked by it.

We build with AI coding agents as a normal part of the workflow, and we hold the quality bar anyway: agent-assisted or not, code ships reviewed, typed, and tested.

Responsibilities
- Build and maintain connectors for ERP, CRM, HR, and field-operations data. Not all of these systems have clean APIs - part of the job is making ingestion reliable anyway.
- Design and ship REST APIs (FastAPI) serving AI agents and internal applications
- Implement RAG pipelines for document-based assistants
- Build the service layer of our in-house CRM
- Contribute to the lakehouse build (medallion architecture on Azure)
- Occasionally build or modify an internal UI (Next.js) when the work calls for it

Tech stack
Python (FastAPI), SQLAlchemy, PostgreSQL (complex SQL, JSONB), Redis, OpenAI and Anthropic APIs, Next.js/TypeScript on the frontend, Docker, Azure, GitHub Actions. Claude Code in daily development.

Requirements
- 5+ years of Python backend development
- Strong SQLAlchemy; solid Pandas/NumPy for data processing
- Hands-on RAG or LLM-backend experience that real users touched
- You work with AI coding agents (Claude Code or similar) day to day - and you review what they produce before it ships
- Basic frontend ability: enough JavaScript/TypeScript to make changes in a Next.js/Vite app
- PostgreSQL performance tuning
- Pytest and type hints as a default working style - we hold an 80% coverage bar
- English B2+ for daily calls with the US team

Nice to have
- Azure ecosystem experience
- dbt
- OCR / document processing
- Construction or logistics domain experience

We offer
- 100% remote, long-term engagement
- Direct contract with the US company - no outstaffing, no agency in between
- Small team, short decision paths, real ownership of what you build

- hours overlap with US Eastern time
 

Hiring process
Intro call with the tech team -> technical interview, including a short live session driving Claude Code on a small task -> in some cases, a short paid test task -> offer

We are looking for an experienced Senior Java Full Stack Engineer (Java+Python, React) to join our development team.

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Hands-on full-stack development of innovative applications
• Owning the entire development cycle, including design, architecture, development, and DevOps
• Working in XP with Remote pairing
• designing, developing, and deploying cloud/hybrid-based solutions

Requirements:

• BS degree in Computer Science or equivalent combination of education and experiencet
• 5-6+ years of experience with Java
• 1 year of experience with Python
• 1 year of experience in front-end development with React
• Experience with Functional Programming and Java Streams
• Experience with AI (Cloud is preferable)
• Experience in development in Kotlin – nice to have
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker
• Self-starter with the ability to appropriately prioritize and plan complex work in a rapidly changing environment
• Versatility and the capability to switch easily between different tasks and technologies
• Experience in assessing a broad range of information solutions and products
• Strong critical thinker with problem-solving aptitude
• Upper-intermediate English level - verbal and written

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Phenomenon Studio is a boutique product design and development agency founded in 2019. We work with teams who’ve outgrown what they’ve built — from venture-backed startups to established market leaders — and own the work end to end: strategy, design, development, and post-launch.

The team of 70+ senior specialists is based in Europe, with entities in the USA, Estonia, and Switzerland, serving SaaS, fintech, healthcare, and EdTech. Across 120+ launches, clients have raised $500M+. Phenomenon is HIPAA-compliant, Nielsen Norman Group UX certified, and a Webflow Experts partner, holding a 5.0 rating on Clutch — and most clients come back for a second project.

Our customer is a GRC (Governance, Risk & Compliance Assessment) platform designed to automate risk assessment, vendor management, and compliance with security standards. It streamlines complex GRC processes by centralizing data, enabling efficient reporting, and reducing manual workload.

The product is used by universities and public sector organizations in the US.

Team: Solution Architect, 2x Backend, 2x Frontend, QA, PM, PO, UI/UX Designer

Requirements:

• 5+ years of commercial backend development experience
• Strong knowledge of Python 3.12+ and async programming (asyncio, async/await patterns)
• Strong hands-on experience with FastAPI (dependency injection, Pydantic, middleware)
• AI-assisted development as a daily practice - everyday, hands-on use of AI coding tools (Claude Code, Cursor, GitHub Copilot, or equivalent)
• Experience building AI agents and using Agent Skills
• Solid experience with SQLAlchemy 2.0 (async), PostgreSQL (asyncpg), and Alembic migrations
• Experience building real-time features with Socket.IO (or equivalent WebSocket frameworks) - rooms, namespaces, auth, scaling across workers
• Experience with Redis and distributed task queues (Celery, or arq/dramatiq)
• Understanding of multi-tenant architectures and data isolation patterns
• Experience with JWT-based auth and role/permission-based access control (RBAC/ABAC)
• Discipline around clean layering - clear separation between routes, services, and repositories (no SQL in the service layer)
• Hands-on experience with AWS (ECS Fargate, RDS, ElastiCache, S3, Secrets Manager, IAM), Docker (multi-stage builds), and Bash
• Experience designing and operating microservices (service boundaries, inter-service communication via internal SDKs, observability)
• Experience with Infrastructure as Code using Terraform (AWS provider, module composition)
• Strong experience writing unit and integration tests (pytest, pytest-asyncio)
• Mentoring and code review experience
• Strong communication skills and experience collaborating with stakeholders
• Upper-Intermediate English level
   

Nice to have:

• Experience with aioboto3 or other async AWS interaction patterns
• Experience scaling WebSocket/Socket.IO deployments (sticky sessions, Redis adapter, horizontal scaling)
• Experience with performance profiling and query optimization at scale
• Experience with CI/CD pipelines (GitHub Actions, GitLab CI)
• Familiarity with uv(Astral) or other modern Python package managers
• Understanding of cybersecurity principles
• Knowledge of security standards (ISO 27000, SOC 2)
• Experience with GRC (Governance, Risk, Compliance) domain

Responsibilities:

• Develop and maintain backend microservices using Python, FastAPI, and async SQLAlchemy
• Use AI tooling daily to accelerate delivery - while owning the correctness, security, and maintainability of everything that ships, regardless of how it was generated
• Design efficient database schemas, write performant queries, and manage schema evolution via Alembic
• Build and maintain real-time features via Socket.IO - event flows, room/namespace design, and reliable delivery under load
• Implement asynchronous workflows using Redis and Celery where appropriate
• Contribute to the microservices architecture - propose improvements for scalability, reliability, and clear service boundaries; consume and evolve internal SDKs for inter-service communication
• Work within a multi-tenant environment - build features that respect tenant isolation and scale across tenants
• Provision and evolve cloud infrastructure on AWS via Terraform (ECS Fargate, RDS, ElastiCache, ALB, IAM), following IaC best practices
• Lead by example through code reviews, mentorship, and adherence to engineering standards (clean layering, tested code, meaningful abstractions)
• Collaborate with team members to align technical implementation with business goals
• Deploy and operate services using Docker and CI/CD pipelines
• Communicate effectively with stakeholders to clarify technical requirements and provide accurate estimations
• Take initiative to identify improvements, propose technical solutions, and contribute ideas that enhance product quality, performance, and security posture

What we offer:

• Remote work format and flexible schedule
• Autonomy in work, opportunity to build processes, and grow within the company
• Individual development plan and annual performance review
• Workshops and playgrounds for continuous learning
• Compensation for subject-matter training
• Corporate English classes
• Access to IT Loyalty Club
• Accounting support
• 18 working days of annual leave
• 7 working days of sick leave and 7 working days of unpaid leave
• All national public holidays off
   

Recruitment process: Recruitment interview — Technical interview — Final interview

 

Job Description

• End-to-End Project Ownership: 2+ years of continuous experience on a single relevant project, guiding it through the entire lifecycle - from initial concept and deployment to production support and maintenance.
• Tech Lead Experience: Proven track record in a Tech Lead or Team Lead role, with experience mentoring developers and establishing engineering best practices.
• Python & Django Expertise: Extensive professional software development experience with deep, hands-on mastery of Python and the Django framework.
• AWS Competency: Practical familiarity with AWS infrastructure and core services, particularly serverless and messaging components (Lambda, SNS, SQS).
• Frontend Oversight Capability: A solid conceptual understanding of any modern JavaScript framework (such as Vue, React, or Angular) - enough to assess tasks, manage delivery, and unblock engineers. Deep frontend development expertise is not required.
• Infrastructure Basics: Practical familiarity with Docker and CI/CD pipelines to support platform migration initiatives.

Job Responsibilities

• Technical Leadership: Act as the Tech Lead for the engineering bench, driving code reviews and setting a high quality bar for overall team delivery.
• Backend Development: Take ownership of core backend services using Python and Django within a multi-region SaaS architecture.
• Infrastructure & Cloud: Work with AWS services (Lambda, SNS, SQS) to support application workflows and assist with the ongoing Kubernetes (K8s) migration.
• Frontend Oversight: Effectively manage and distribute tasks across the frontend scope (built on Vue.js), focusing on high-level architecture and task delivery rather than hands-on frontend development.

Department/Project Description

GlobalLogic is seeking a Fullstack Lead Engineer to step into a Tech Lead role for our engineering bench, supporting a sophisticated, regulated medical technology platform. This position is ideal for a seasoned backend-heavy leader with deep expertise in Python and Django, a solid understanding of AWS, and the ability to oversee a cross-functional engineering team.

As a Lead Engineer, you will set the quality bar for the team, drive code reviews, and ensure the operational excellence of the platform. While your hands-on focus will be primarily on scaling and maintaining our Python/Django services and AWS infrastructure, you will also oversee the frontend scope. You don't need to be a Vue.js expert - your role is to understand modern frontend architectures well enough to effectively delegate, manage, and unblock the frontend workload. Additionally, you will support strategic platform evolutions, including an upcoming Kubernetes migration.

WebParsers is seeking a talented Python Developer specializing in web scraping to join our dynamic team. We offer a collaborative work environment, flexible scheduling, and opportunities for growth. We're open to considering final-year students with relevant commercial experience.
 

Required Skills:

• Minimum 1 year of commercial Python experience
• Proficiency in web scraping, data gathering, and data cleaning
• Web automation expertise
• Hands-on experience with BeautifulSoup, Selenium, and lxml
• Work with SQL and NoSQL databases
• Ability to deploy scrapers on servers
• High self-management skills
• Great communication skills
• Take responsibility for tasks and ensure they are completed independently
   

Core Responsibilities:

• Design and implement efficient web scraping and parsing solutions
• Work closely with project managers to address client needs
• Optimize applications to meet project requirements
• Proactively learn new technologies and improve existing workflows
   

Preferred Skills (Nice to Have):

• Experience with Nodriver
• JavaScript proficiency
• Familiarity with Mobile Application Scraping (Android, IOS)
• Familiarity with Pandas for data manipulation
• Experience with CAPTCHA-solving services like 2Captcha and AntiCaptcha
• AI prompting knowledge is a plus
   

If you're passionate about data extraction and looking for a challenging role in a supportive environment, we'd love to hear from you. Join WebParsers and help us push the boundaries of web scraping technology!

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

Project Overview

The project involves the modernization of the HR-Suite platform, migrating existing functionality from a legacy Microsoft Access and VB6 environment to a modern technology stack based on C# and HTML5. The team will be responsible for designing, developing, and delivering scalable solutions that support future business growth and operational efficiency.

Required Skills

• C#
• .NET Core
• API & Service-Oriented Architecture
• HTML5
• AI integration and development
• German language

Preferred Skills

• Payroll and HRM domain knowledge (advantageous but not mandatory)
  Openinig for relocation to Spain or Portugal
  With German language

We are looking for a .NET C# Developer with expertise in building robust APIs using OData and Entity Framework. The ideal candidate will also have strong proficiency in writing efficient SQL queries and an understanding of best practices for data modeling, performance tuning, and security. 

As a part of our development team, you will work closely with cross-functional teams to design, build, and maintain scalable and secure APIs that integrate seamlessly with our services and data sources. 

Key Responsibilities: 

• API Development: Design, develop, and maintain RESTful APIs with a focus on OData integration, enabling efficient querying and data retrieval. 
• OData Implementation: Utilize OData to expose data from various sources, allowing clients to query and manipulate data efficiently via HTTP requests. 
• Entity Framework: Work with Entity Framework to create, update, and query data models, ensuring efficient database interactions and optimal performance. 
• SQL Query Writing: Write complex SQL queries to interact with relational databases, optimize performance, and ensure data consistency. 
• System Design & Architecture: Participate in designing scalable, high-performance architectures for APIs and backend systems. 
• Code Quality: Write clean, maintainable, and well-documented code, following industry best practices and company standards. 
• Collaboration: Work closely with other developers, product managers, and QA engineers to deliver high-quality features on time. 
• Troubleshooting & Debugging: Identify, troubleshoot, and resolve technical issues, bugs, and performance bottlenecks in a timely manner. 
• Continuous Improvement: Stay up-to-date with the latest developments in .NET technologies, OData, Entity Framework, and SQL, and apply best practices to improve system performance, reliability, and scalability. 

Requirements: 

• Proven Experience: 5+ years of experience in .NET C# development, with a focus on building APIs and working with web services. 
• OData Expertise: Solid understanding and hands-on experience in implementing and consuming OData APIs. 
• Entity Framework: Experience working with Entity Framework to map data models to database schemas and interact with relational databases. 
• SQL Proficiency: Strong ability to write and optimize complex SQL queries and work with relational databases (e.g., SQL Server, PostgreSQL, etc.). 
• Web API Knowledge: Familiarity with RESTful API principles and experience working with technologies like JSON, HTTP, and Web API frameworks. 
• Version Control: Experience using version control systems like Git or SVN. 
• Problem Solving: Strong analytical and debugging skills, with the ability to troubleshoot and optimize code for performance and reliability. 
• Collaboration Skills: Excellent communication and teamwork skills to collaborate effectively with cross-functional teams. 

Preferred Qualifications: 

• Cloud Experience: Familiarity with cloud platforms like Azure or AWS for hosting and scaling web applications.  
• Unit Testing: Experience writing unit tests and using frameworks like NUnit, MSTest, or xUnit.  
• Microservices: Understanding of microservices architecture and how APIs fit into distributed systems.  
• CI/CD: Familiarity with continuous integration/continuous deployment (CI/CD) pipelines and automated testing.  
• Real-Time Communication: Experience developing real-time applications and APIs using SignalR or similar technologies.  
• Messaging & Integration: Experience with Azure Service Bus or other enterprise messaging platforms for asynchronous communication and system integration.  
• Event-Driven Architecture: Understanding of event-driven architecture, messaging patterns, and distributed system design principles.  
• Event-Driven Development: Experience implementing event-driven solutions using queues, topics, publish/subscribe patterns, and asynchronous processing workflows.  
• Azure Ecosystem: Familiarity with Azure integration services and cloud-native development patterns, including messaging, event processing, and scalable backend services. 
• Experience leveraging AI-assisted software development tools such as Claude Code, GitHub Copilot, ChatGPT, or similar platforms to enhance developer productivity, code quality, troubleshooting, testing, and documentation.  
• Familiarity with modern AI-driven development workflows, including prompt-based code generation, code review assistance, refactoring, and automated test creation. 

PwC is a global network of more than 370,000 professionals in 149 countries that turns challenges into opportunities. We create innovative solutions in audit, consulting, tax and technology, combining knowledge from all over the world.

PwC SDC Lviv, opened in 2018, is part of this global space. It is a place where technology is combined with team spirit, and ambitious ideas find their embodiment in real projects for Central and Eastern Europe.

What do we guarantee?

• Work format: Remote or in a comfortable office in Lviv - you choose.
• Development: Personal development plan, mentoring, English and Polish language courses.
• Stability: Official employment from day one, annual review of salary and career prospects.
• Corporate culture: Events that unite the team and a space where everyone can be themselves.

We are looking for a C# Developer (Mid/Senior) with strong experience in developing WPF-based desktop applications using C#. The role focuses on building tools for data processing and transformation, including importing, validating, converting, and exporting datasets in various formats. The candidate should be able to work independently based on provided specifications, while also collaborating with a remote team.

Main Responsibilities:

• Develop and maintain WPF desktop applications written in C#;
• Create tools for data processing and transformation, including import, validation, conversion, and export of datasets;
• Implement solutions based on provided technical specifications with minimal supervision;
• Perform code development, testing, and self-review to ensure high quality and reliability;
• Participate in technical discussions to clarify requirements and implementation details;
• Collaborate with team members and a project buddy as part of a remote team;
• Follow internal development standards and onboarding guidance provided by colleagues from Poland.

Key Requirements:

• Solid experience in C# development, with a strong focus on WPF desktop applications;
• Practical experience with data processing workflows (importing, validating, transforming, exporting data);
• Ability to work independently and take ownership of assigned tasks;
• Experience with testing and self-checking code results;
• Comfortable working in a remote team environment and participating in technical discussions;
• Team-oriented mindset, with readiness to collaborate and communicate effectively.

Policy statements:
https://www.pwc.com/ua/uk/about/privacy.html

Senior Java Engineer (high-load product) 

Are you a Java Developer looking for new challenges? 
What about working with a high-profile client with millions of QPS? 
If you have experience developing high-performance distributed systems, this is the perfect opportunity to work on a new digital marketing management platform with a world-renowned client.
 
Project tech stack: 
Concurrency -  a high-load, low-latency system.
Cache: Aerospike, Memcached
Cloud: AWS, GCP
DB: PostgreSQL, Superset
Streams: Kafka, Kinesis
Data formats: Avro, Protobuf
Languages: Java, Scala, Python
 
About the project:
Our client is a leading streaming service based in the United States. With millions of users worldwide, its devices provide easy access to free TV, live news, sports, movies, etc. The client has an advertising business and also licenses its hardware and software to other companies.
 
Location:
Ukraine remote
 
Skills & Experience:
- 4 - 8 years of experience building large-scale and low-latency distributed systems
- B.S. or M.S. degree in Computer Science, Engineering, or equivalent 
- Command of Java or C++
- Solid understanding of algorithms, data structures, performance optimization techniques, object-oriented programming, multi-threading, and real-time programming 
-Self-motivated individual with a high level of accountability and ownership
- Critical thinking and practical decision making
- Can do, results-oriented mindset
 
Will be a plus: 
- Experience with distributed caching, SQL/NoSQL, and other databases is a plus 
- Experience with Big Data and cloud services such as AWS/GCP is a plus
Experience in the advertising domain is a big plus 

 Responsibilities
- Work alongside a highly skilled engineering team to design, develop, and maintain large-scale, highly performing, real-time applications
- Own building features, driving directly with product and other engineering teams 
- Demonstrate excellent communication skills in working with technical and non-technical audiences 
- Be an evangelist for best practices across all functions – developers, QA, and infrastructure/ops 
- Be an evangelist for platform innovation and reuse 
- Deliver top-quality software in a timely fashion 

 

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

  Hi! We are looking for a Node.js Backend Developer (NestJS) to join our pack at SharksCode 🦈💙
SharksCode is a Ukrainian IT company that develops high-tech software solutions and scalable B2B platforms.
  We are looking for a Node.js Backend Developer who will work on building scalable backend services and integrations within a distributed architecture. In this role, you will participate in designing and developing platform services, integrating external systems, and contributing to technical decisions that impact the overall product architecture.
 

We expect that you:

• Have 5+ years of commercial backend development experience with Node.js.
• Have 3+ years of commercial experience with TypeScript.
• Have 3+ years of experience with NestJS or be ready to quickly adopt it.
• Have hands-on experience with relational and NoSQL databases, including PostgreSQL, MySQL, and MongoDB.
• Have experience designing and developing microservice-based distributed systems.
• Have hands-on experience with RabbitMQ, Kafka, and event-driven architecture.
• Have experience with Redis for caching, Pub/Sub, or distributed synchronization.
• Have substantial experience writing and maintaining unit and integration tests using Jest.
• Have strong knowledge of software architecture, design patterns, SOLID principles, and engineering best practices.
• Have experience with Docker, Kubernetes, CI/CD pipelines, and communication technologies such as WebSocket or gRPC.
   

Your future responsibilities:

• Design and develop backend services and platform functionality.
• Build and maintain integrations with third-party technical services.
• Develop and maintain microservices.
• Participate in technical discussions and architecture decisions related to platform development.
• Ensure high code quality and follow engineering best practices.
• Share knowledge and contribute to the development culture within the team.
   

Nice to have:

• Experience building high-load, highly available, or real-time systems.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.).
• Experience with cloud platforms such as AWS, GCP, or Azure.
   

Interview stages:

🤝 Interview with Recruiter.
🧠 Technical Interview.
💙 Offer.
 

We offer:

🌴 24 paid vacation days, 14 sick days, and 5 days off.
⏰ Flexible start of the working day — from 9:00 to 11:00.
🏥 Medical insurance.
💰 Bonuses and performance-based rewards.
🐶 Office in the center of Kyiv — pets are welcome, we are pet-friendly.
💆 Lounge area in the office to recharge during the day.
🎾 Padel tennis, football, and training at the polygon for those who enjoy active leisure.
📚 Learning compensation, internal meetups and workshops, as well as access to the corporate LMS with courses.
🎁 Corporate currency that can be exchanged for merch, gifts, or additional benefits.

About YouScan

YouScan.io is one of the most successful Ukrainian SaaS companies. Our deep tech product, powered by in-house developed AI technology, is one of the leaders in the social listening space globally. The entire engineering department works on collecting billions of social media posts daily, processing them with cutting-edge technologies, and providing meaningful insights to our customers.
We are a creative, low-ego, team-spirited company. Our organization is very flat, and our team is small and talent dense. We particularly like people who are truthseeking, passionate, and creative. We enjoy spirited debate, crazy ideas, and shipping code.

We really value innovation, bottom-up ideas, and execution.

We hold company-wide hackathons twice a year:
https://medium.com/youscan/are-you-afraid-of-hackathons-85a99081d8cf

We're in-person in a cozy office in central Kyiv with a beautiful terrace overlooking the historic center.
 

Position overview

We expect a strong engineer and, above all, a teammate, someone who shares their vision, communicates, brings their own ideas, listens, and hears different viewpoints. We don't have dedicated QA engineers or product managers, so you will be responsible for the whole cycle of feature development, from shaping the idea with the help of our Head of Product to developing, testing, and deploying your work.
 

What you'll do

• Transform conceptual ideas into technical reality, balancing engineering excellence with product needs and user experience.
• Take ownership of features from concept to deployment, making critical decisions that impact product quality and user satisfaction.
• Solve real-world scaling problems that require thorough performance analysis and troubleshooting skills.
• Work with a modern and constantly evolving microservices-based software stack, which includes C#, Elasticsearch, Kubernetes, Docker, etc.
• Collaborate closely with other teams and departments.
• After the probation period, you will participate in the on-call rotation. But don't worry. Our on-call rotation is human-centered. You can read more here: https://medium.com/youscan/on-call-how-not-to-burn-7737be8cb390

Qualifications

You might be a fit if...
 

• You love innovation and have an entrepreneurial mindset, eager to solve challenging real-world problems with breakthrough technology.
• You have a strong track record in building full-stack applications that are actively used at scale.
• You have 4+ years of experience with Backend development (.Net preferably)
• You have experience with big data systems (we process billions of items daily).
• You like to get things done.
• You take initiative and persevere through challenges.
• You take strong ownership of your tasks.
• You are an effective and clear communicator.
• You blend excellent engineering with product thinking and UX principles.
• You have a propensity for creative ideas and a knack for making powerful tools without compromising their ease of use.
• Experience with TypeScript/React is a plus, as some front-end involvement is welcomed.
• Location - Kyiv, Ukraine!

Stack and Tools

We use C# as our main language, always relying on async IO and utilizing TPL DataFlow for complicated processing pipelines.
We process ~1 billion social media mentions every day. We extensively use Azure Queues and Tables Services for communication and storage. We developed an in-house batching technique to save 10x on queue operations:
https://medium.com/youscan/batching-for-cloud-queues-spend-10x-less-7ec5ac231443

Our history cluster in Elasticsearch is over 2 Petabytes of data.
We're using .NET Core and Kubernetes, writing our Infrastructure as code, and running it with Terraform. We use GitHub Actions for build and deployment. We ship many times per day.
We love predictability: metrics on Prometheus / Victoria Metrics + ELK for logs and alerts integration to Slack.
 

Challenges

Nothing worth doing is easy, so don’t expect an easy walk here. We are a small team competing against much larger companies for the global customers.
 

• Unlike bureaucratic companies with rigid processes, you'll work in a highly unconstrained environment where you'll need to make independent decisions, set your own priorities, and manage your workload without micromanagement.
• Without dedicated QA engineers or product managers, you'll need to develop skills across the entire development lifecycle – from conceptualizing features to ensuring their quality and successful deployment.
• You'll be tackling complex engineering challenges to process hundreds of millions of social media posts daily

Recruitment process

• Interview with our Head of Talent Acquisition
• Intro call with the Hiring Manager
• Test task
• System Design interview
• Final interview with our Head of Product and Head of AI
• Reference check

No tricks, no unnecessary rounds, just enough touchpoints for us to get to know each other well.
 

What we offer

• Opportunity to work on a cutting-edge product used by global brands
• Professional growth in a collaborative and innovative environment full of professionals
• Competitive compensation and benefits package
• Flexible schedule
• 4-day workweek during summer
• Unlimited vacations (yes, really)