Jobs Backend

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 a Red Dot Award-winning studio, a Claude Select Partner, and a Webflow Certified Partner. The team includes Nielsen Norman Group UX Certified professionals, and the studio is HIPAA-compliant. Phenomenon holds a 5.0 rating on Clutch, and most clients come back for a second project.
 
About the project
A subscription-based web service for creating and managing dynamic QR codes for the Canadian market. Users create codes for links, PDFs, vCards, menus, videos, and more, customize their design, and can update the content even after the code is printed. The platform includes hosted landing pages, a dashboard for organizing codes, and detailed scan analytics.

Contract duration: 3-4 months

Team: Solution Architect, 2x Backend Developers, 2x Frontend Developers, QA, DevOps, PO, PM, BA, Designer

Requirements:

• 4+ years of experience in JavaScript, TypeScript
• Strong knowledge of Node.js - Express.js, NestJS
• Strong knowledge of ORMs, PostgreSQL, MySQL, MongoDB, Redis
• Strong knowledge of Real-time(socket-based)
• Strong knowledge of REST API, Git
• Experience with Docker
• Experience with Microservices; experience designing distributed systems
• Experience with AWS: Lambda, DynamoDB, S3, SQS, SNS, API Gateway
• Experience with CI/CD
• Testing: Jest + integration/e2e
• Excellent communication skills
• Experience with HIPAA and GDPR compliances
• Upper-intermediate English level

Nice to have:

• Knowledge of other frameworks
• Knowledge of Supabase
• Knowledge of Strapi
• Experience with Jira / ClickUp

Responsibilities:

• Design, develop, and maintain scalable backend services using Node.js (Express.js, NestJS)
• Work with various databases, including PostgreSQL, MySQL, MongoDB, and Redis, ensuring high performance and data integrity
• Develop and deploy a microservices-based architecture using Docker and AWS
• Implement and manage real-time, socket-based communication systems
• Lead and mentor teammates, review code, and guide architectural decisions
• Oversee project timelines, task assignments, and ensure high-quality code delivery
• Collaborate with cross-functional teams and communicate effectively in English (written and spoken)
• Manage tasks and workflow using project management tools such as Jira or ClickUp

What we offer:

• A team of open-minded and supportive professionals
• Comfortable part-time schedule with autonomy in processes
• Full remote work format
• Flexible workload and the possibility to combine with studies, personal projects, or other activities
• Work-life balance: we value results, not the number of hours spent 

Recruitment process: Recruitment interview - Technical interview

About the role

We are looking for a Senior Backend Engineer to join Proxet and contribute to a long-term engagement with a UK-based technology company developing simulation and decision-support solutions for governments and enterprises.

 

Who are we looking for?

Skills & Experience

• 7+ years of professional software engineering experience, with strong hands-on expertise in Python backend development.
• Experience building and maintaining production services, APIs, and integrations.
• Good understanding of distributed systems, microservice architectures, and asynchronous data processing.
• Experience with relational databases, preferably PostgreSQL, including schema design, query optimisation, and troubleshooting.
• Experience with data ingestion, processing pipelines, and integration of external data sources.
• Practical experience deploying and troubleshooting applications using Docker and Kubernetes.
• Experience with CI/CD pipelines, Git workflows, and automated testing.
• Strong debugging skills and the ability to investigate issues across services, data flows, and deployment environments.
• Experience using AI coding assistants in development, with the ability to review, validate, and take responsibility for generated code.
• Experience communicating directly with customers or external stakeholders to clarify requirements and resolve technical questions.
• Ability to explain technical concepts clearly to non-technical audiences and translate operational needs into engineering tasks.
• Strong ownership, sound technical judgement, and comfort working with evolving requirements.
• Understanding of the Ukrainian context and confidence in communicating with local organisations.
• Professional proficiency in Ukrainian and English for customer meetings, technical discussions, and written communication.
• Willingness and ability to travel to customer sites within Ukraine.

Nice to have

• Hands-on experience with Kafka publishers and consumers.
• Experience with Dagster or similar data orchestration tools.
• Experience working with public-sector organisations, local authorities, or infrastructure operators.
• Experience adapting and deploying software in customer-managed or private-cloud environments.
• Familiarity with GCP, AWS, or Azure.
• Experience with Helm, OpenShift, and shell scripting.
• Familiarity with Parquet, object storage, and metadata management.
• Experience integrating AI agents, MCP interfaces, or LLM APIs.
• Familiarity with simulation platforms, digital twins, or decision-support systems.
• Knowledge of C++.

Responsibilities

• Design, develop, and maintain Python backend services and APIs supporting customer applications and simulation workflows.
• Work directly with customers and external organisations in Ukraine to understand their needs, operational processes, and local constraints.
• Participate in customer meetings, clarify requirements, and explain technical options and trade-offs.
• Translate customer needs into implementation tasks, data requirements, and integration specifications.
• Adapt existing platform capabilities to local use cases and share customer insights with the wider engineering and product teams.
• Build and maintain data ingestion and processing pipelines using Dagster.
• Integrate customer data sources with platform services and containerised simulation models.
• Work with Kafka publishers and consumers to process simulation outputs.
• Design and optimise PostgreSQL schemas and queries, and support appropriate data storage solutions.
• Build reusable backend components and identify opportunities to apply customer-specific improvements across other deployments.
• Contribute to deployment and troubleshooting of containerised applications in Kubernetes-based environments.
• Maintain automated tests and CI/CD workflows to support reliable delivery.
• Collaborate with frontend engineers, platform specialists, modellers, and delivery stakeholders.
• Participate in code reviews and technical design discussions, documenting decisions and integration approaches.
• Use AI development tools effectively while maintaining code quality, correctness, and maintainability.
• Communicate progress, dependencies, and technical issues clearly to both internal teams and customer stakeholders.

We’re looking for an AI-forward Backend Developer to help build a platform focused on international payments, crypto infrastructure, and blockchain integrations.

The platform integrates external payment and financial service providers such as Bridge, works with crypto and stablecoin-related services, and supports on-chain interactions. The backend is primarily API-driven, connecting external systems, processing transactions and events, and storing application data in MongoDB.

We value engineers who are passionate about developer platforms, enjoy solving integration challenges, and use Claude and other AI-powered tools to accelerate development.

Responsibilities

• Develop and maintain backend services using Node.js, TypeScript, and Express.js.
• Design and implement REST APIs and integrations with third-party services.
• Integrate payment infrastructure providers such as Bridge and similar fintech or crypto platforms.
• Build backend workflows for international payments, stablecoins, and crypto-related operations.
• Work with blockchain APIs, on-chain transactions, and transaction status monitoring.
• Design and maintain MongoDB schemas, data models, and persistence logic.
• Implement webhooks, background jobs, asynchronous workflows, and reliable error handling.
• Ensure data consistency and reliability when processing payment and blockchain events.
• Deploy, maintain, and monitor backend applications and services on AWS.
• Apply security best practices when handling sensitive financial data and transaction workflows.
• Use Claude and other AI-powered development tools in daily engineering tasks.
• Collaborate with the team on architecture, implementation, and technical improvements.

Requirements

• Strong experience with Node.js and TypeScript.
• Practical experience building backend services with Express.js.
• Experience with MongoDB and database design.
• Proven experience integrating third-party APIs into production applications.
• Good understanding of REST APIs, webhooks, authentication, and asynchronous processing.
• Experience deploying and maintaining applications on AWS.
• Understanding of crypto, blockchain fundamentals, and on-chain transactions.
• Familiarity with financial transaction workflows, error handling, and data consistency.
• Hands-on experience with Claude or similar AI coding tools.
• Ability to work independently, troubleshoot complex integrations, and take ownership of backend features.

Nice to Have

• Experience with fintech, international payments, or cross-border payment systems.
• Previous experience integrating Bridge or similar payment and crypto infrastructure providers.
• Knowledge of stablecoins, crypto wallets, blockchain APIs, and transaction signing.
• Familiarity with Ethereum and EVM-compatible networks.
• Experience with smart contracts, blockchain event indexing, or transaction monitoring.
• Familiarity with AWS services, queues, background workers, and distributed systems.
• Experience building developer platforms, public APIs, or SDKs.
• Basic familiarity with React or Next.js to support full-stack collaboration when needed.

Who We’re Looking For

We’re looking for a practical, AI-first backend engineer who uses Claude to accelerate implementation, explore solutions, debug issues, and improve code quality without blindly relying on generated code.

You enjoy building backend systems that connect external APIs, process financial data, and interact with blockchain infrastructure. You understand the importance of security, reliability, and proper error handling when working with payment systems and on-chain transactions.

You’re comfortable working in a lean team, making technical decisions, and delivering straightforward solutions without unnecessary complexity. A passion for developer platforms and making API integrations easier for other developers is a strong advantage.

What We Offer

• The opportunity to build a product at the intersection of international payments, crypto, and blockchain.
• An AI-first development environment with tools such as Claude.
• A lean team, direct communication, and technical ownership.
• The opportunity to work on real-world payment integrations and crypto infrastructure.

If you enjoy backend engineering, API integrations, blockchain technology, and AI-assisted development, we’d love to hear from you.

Ми шукаємо Senior Python Backend Developer у продуктову команду, яка розробляє real-time платформу для крос-біржового арбітражу на perpetual futures.

Це технічно складний FinTech/crypto продукт із фокусом на швидкість виконання, стабільність, роботу з біржами та обробку даних у real-time.

Технологічний стек:

• Python 3.11+, asyncio, FastAPI, Pydantic
• PostgreSQL, SQLAlchemy async, Alembic, TimescaleDB
• Redis
• NATS JetStream, Kafka
• aiohttp, httpx, WebSockets
• ccxt та API криптобірж
• AWS, Docker, GitHub Actions
• Prometheus, Grafana, OpenTelemetry

Проєкт працює з Binance, MEXC, BingX, Bybit та іншими біржами.

Що потрібно буде робити:

• розвивати Python backend та існуючу мікросервісну архітектуру;
• працювати з real-time market data та execution flow;
• інтегрувати нові криптобіржі та підтримувати існуючі інтеграції;
• працювати з REST API та WebSockets;
• оптимізувати latency та продуктивність системи;
• працювати з PostgreSQL, Redis, Kafka/NATS;
• забезпечувати надійність системи при помилках, часткових відмовах та проблемах із зовнішніми API;
• працювати з trading logic: ордери, risk checks, retry/rollback, reconciliation;

• підтримувати observability та моніторинг системи.

   

Що ми очікуємо:

• 3+ роки комерційного досвіду з Python Backend;
• хороший практичний досвід з asyncio та асинхронним Python;
• досвід із FastAPI / Pydantic;
• впевнене знання PostgreSQL та SQL;
• досвід із distributed/event-driven системами та хоча б одним із брокерів: Kafka, NATS або RabbitMQ;
• розуміння concurrency, race conditions, retries, idempotency та partial failures;
• досвід інтеграції сторонніх API;
• самостійність та здатність працювати з технічно складними задачами.

Важливий момент:

На проєкті основний фокус саме на async Python. Тут не використовуються Django/DRF та Celery, тому нам важливий кандидат, який має реальний досвід роботи з asyncio та розуміє, як працюють конкурентність і event loop.

Умови:

• Формат: remote;
• Графік: 9:00–18:00 або 10:00–19:00;
• Оплата: у USD, двічі на місяць;
• невелика продуктова команда: Product Owner, Architect, Backend, Frontend, DevOps;

• мінімум бюрократії та багато самостійності.

   

Процес найму:

1. Коротка онлайн-зустріч із рекрутером.
2. Технічна співбесіда з CTO.
3. Офер.

На технічному етапі основний фокус буде на asyncio, concurrency, distributed systems, queues та поведінці системи при часткових відмовах.

Intetics Inc., a leading American technology company specializing in custom software application development, distributed professional teams creation, software product quality assessment, and “all-things-digital” solutions, is looking for a Senior WordPress Developer to join its innovative team.

Project Responsibilities

Build and maintain custom themes, plugins, and Gutenberg blocks across a portfolio of high-traffic, multilingual WordPress sites

Develop and maintain libraries, block collections, Composer packages, and tooling that accelerate delivery across teams

Own quality and performance: refactor legacy code, optimize queries and caching, and improve Core Web Vitals metrics

Build and consume REST APIs and integrations with internal and third-party systems

Take part in code reviews, CI/CD improvements, and engineering standards initiatives

Collaborate with product, marketing, SEO, content, and QA teams on new features and site improvements

Document technical decisions and contribute to engineering best practices

Ensure software development best practices and timely product delivery

Candidate's Portrait

We're looking for a Senior WordPress Developer who treats WordPress as a modern engineering platform rather than a traditional CMS. You'll help build and scale high-traffic multilingual web platforms while maintaining high standards of performance, security, scalability, and code quality. The ideal candidate cares about architecture as much as feature delivery and writes code that other developers are happy to maintain.

Must-haves:

5+ years of WordPress development experience

Strong Object-Oriented PHP (8.x) skills

Experience with namespaces, PSR standards, and Composer

Deep knowledge of WordPress Core APIs

Strong understanding of hooks, custom post types, taxonomies, WP_Query, and metadata APIs

Experience with ACF Pro and native custom fields

Solid production experience building Gutenberg blocks

React and JSX development experience

Experience with block.json and wordpress/scripts

Strong modern JavaScript (ES6+)

Experience with Webpack or Vite

Modern CSS development (Sass, PostCSS)

Experience designing and building RESTful APIs

Experience creating custom WordPress REST endpoints

Strong understanding of WordPress security best practices

Experience with sanitization, escaping, nonces, and user capabilities

WordPress performance optimization expertise

Object caching and query optimization experience

Comfortable with Git-based workflows, pull requests, and CI/CD pipelines

Experience working in AI-assisted development environments (Copilot, Cursor, Claude Code, etc.)

Good written and spoken English

Nice-to-have:

Block Themes

Full Site Editing (FSE)

theme.json

WordPress Interactivity API

Bedrock or similar Composer-based WordPress structures

PHPUnit

Playwright

PHPStan

PHPCS / WPCS

Timber / Twig

Blade templating

WordPress Multisite

WPML

Polylang

Headless WordPress

WPGraphQL

Next.js

Accessibility (WCAG 2.2)

Technical SEO

Experience with enterprise content platforms

Experience with high-traffic web applications

We are looking for a Mid/Senior Java Backend Engineer to join the insurance division of a large Polish software company. This is a backend-first role: you will build high-performance services and integrations with external providers for in-house platforms used by insurers in Poland and abroad. The platforms cover the full policy lifecycle and claims handling and process millions of operations every month. You will work in an international team with colleagues from Scandinavia, Belgium and Poland, on modules such as financial settlement, accounting, investment funds and claims. The team works in a Spec Driven Development model with AI agents, using them for specs, planning, documentation and tests. Over time, you may also pick up Angular tasks as the project needs, so openness to frontend work is important.

Details:

• Schedule: Full time
• Location: Hybrid – Kraków, Gdańsk, Łódź or Poznań, Poland (3 days in the office, 2 remote; more office time during onboarding, up to 3 months)
• Start: ASAP
• Duration: Long-term
• English: Upper-Intermediate (B2)
• Polish: Elementary (B2) or higher
• Type of collaboration: Internal Employment (UoP) or B2B Contract – your choice

About the project:
The company is one of the largest software vendors in Poland. Its insurance division builds its own platforms for insurance companies in Poland and other European markets. These systems support the whole policy lifecycle, from product setup and sales to policy servicing and claims processing. They handle millions of operations a month, so performance, reliability and data accuracy really matter. The division is growing fast and is adding engineering teams in several Polish cities. Teams are international and work closely with business analysts and insurance domain experts. Engineering is moving toward structured, AI-assisted development, where AI agents support specs, planning, documentation and testing.

You have:

• 4+ years of commercial software development experience
• Strong commercial experience with Java and Spring Boot in production systems (experience limited to CMS/AEM or legacy J2EE is not a fit)
• Experience building high-performance REST APIs
• Experience building integrations with external providers and third-party systems
• Experience with MongoDB and/or PostgreSQL
• Openness to learning Angular and taking on frontend tasks over time
• Structured use of AI tools in development (specs, planning, tests), not only autocomplete
• Polish at A2 level or higher (everyday conversation), as some teams work in Polish
• English at B2 level (team communication and technical documentation)
• Legal right to work in Poland (e.g. Karta Pobytu, permanent residence or EU citizenship)
• Readiness to work from the office in Kraków, Gdańsk, Łódź or Poznań 3 days a week

Nice to have:

• Experience in the insurance, banking or fintech domain
• Experience with microservices, event-driven architecture (Kafka), sagas or DDD
• Any hands-on experience with Angular or TypeScript

What to do:

• Design, build and maintain backend services in Java and Spring Boot for insurance platforms
• Build high-performance REST APIs and integrations with external providers
• Work with MongoDB and PostgreSQL databases
• Work on business modules such as financial settlement, accounting, investment funds and claims
• Use AI agents in a Spec Driven Development process to write specs, plan work, document solutions and create tests
• Collaborate with an international team (Scandinavia, Belgium, Poland), business analysts and domain experts
• Take part in code reviews and architecture discussions
• Pick up Angular frontend tasks when the project needs them

We’re looking for a .NET Engineer to join a product team developing a platform for voice communications and Microsoft Teams integrations.

You’ll work primarily on the backend, building services that support Teams calls, meetings, recordings, and communication data. A key part of the role is integrating the product with Microsoft Teams and ensuring these integrations remain stable and reliable in production.

What you’ll do

• Build and enhance backend services with C#, .NET, and ASP.NET Core
• Develop integrations with Microsoft Teams
• Work extensively with Microsoft Graph API and Teams communication APIs
• Implement functionality related to calls, meetings, recordings, and communication data
• Create and maintain REST APIs and integrations with external services
• Investigate and fix production issues related to Teams and voice functionality
• Help improve the platform’s performance, reliability, and scalability
• Contribute to architectural discussions and technical improvements

What we expect

• 3+ years of commercial experience with C# / .NET
• Strong experience building backend applications with ASP.NET Core
• Proven commercial experience integrating products with Microsoft Teams
• Hands-on knowledge of Microsoft Graph API
• Experience with Teams calls, meetings, recordings, or communication APIs
• Experience building integrations with third-party systems and APIs
• Solid understanding of SQL, databases, and backend architecture
• Ability to troubleshoot and solve technical issues independently

• English — B2+

   

Good to have

• Microsoft Graph Communications / Calls & Meetings APIs
• Experience with Teams compliance recording or call-recording solutions
• Previous work with VoIP, telephony, voice, or contact center products
• Knowledge of real-time audio or media processing
• WebRTC, SIP, RTP
• SignalR / WebSockets
• Azure

You’re a backend-oriented .NET Engineer who has already worked with Microsoft Teams integrations in a commercial environment and understands the challenges of communication-focused products.

Beyond strong .NET skills, we’re looking for someone familiar with the practical side of calls, meetings, recordings, and voice integrations, including supporting and troubleshooting them in production.

What’s In It for You?

• Career Growth – Opportunities to develop and advance.
• Performance Reviews – Regular feedback and support.
• Work Anniversaries – Special gifts to celebrate milestones.
• Flexible Work – Hybrid or remote (Lviv office available).
• Mentorship – Guidance from experienced professionals.
• Accounting Support – We handle the paperwork.
• Paid Time Off – 18 vacation days + 5 sick days per year.
• Extra Leave – 10 additional days off annually.
• Free Office Lunches – Enjoy meals on us.
• Team Events – Gatherings, gifts, and a welcoming atmosphere.

We’re working on a product that powers real conversations — an intelligent call center platform built to handle serious communication volumes. Think smart call routing, live dashboards, VoIP, and deep CRM integrations. The system is already running, already growing, and needs an engineer who wants to help shape where it goes next.

📍 Lviv / Remote · Full-time · 3+ years · English Upper-Intermediate

Stack:

.NET 6+ / C# · React.js · TypeScript · MS SQL Twilio · WebRTC · SignalR · Azure (optional)

What You’ll Do:

→ Build and maintain features across the full stack

→ Integrate telephony and CRM systems via APIs

→ Work on performance and scalability

→ Take part in code reviews, estimations, and tech discussions

What We’re Looking For:

→ 3+ years with .NET (C#) and React.js in commercial projects

→ Good understanding of web architecture and client-server communication

→ Experience with REST APIs, relational databases, Git

→ English B2

What’s in It for You

✦ Stable long-term project

✦ Mentorship and regular growth conversations

✦ Remote or hybrid

✦ 18 vacation + 5 sick + 10 extra days off per year

✦ Accounting support, office lunches, team events

✦ Work Anniversaries -Special gifts to celebrate milestones.

.NET Engineer | Microsoft Teams & Voice Communications

We are looking for a .NET Engineer to join our product team working on a voice communication platform with deep Microsoft Teams integration.

This role is focused on backend development and communication-related functionality, including calls, meetings, recordings, and communication data. You will work with Microsoft Teams and Microsoft Graph APIs, develop new features, maintain existing integrations, and troubleshoot production issues.

We are looking for an engineer with commercial experience in Microsoft Teams integrations and a good understanding of how communication and voice functionality works in real-world products.

What you’ll do

• Develop, maintain, and optimize backend services using C#, .NET, and ASP.NET Core.
• Design and support integrations with Microsoft Teams, Microsoft Graph API, and Teams communication APIs.
• Build and enhance functionality for calls, meetings, recordings, and communication data.
• Design, develop, and maintain Microsoft Teams bots hosted on Azure, including real-time activity processing and notifications.
• Implement and improve Teams activity feed notifications using Microsoft Graph API.
• Develop and maintain REST APIs and third-party integrations.
• Deploy, configure, and manage bots and backend services on Azure (Bot Service, App Service, AKS).
• Configure bot authentication, authorization, and permissions using Microsoft Entra ID (Azure AD).
• Troubleshoot production issues, monitor system performance, and ensure service reliability.
• Improve the performance, stability, and scalability of the platform.

• Collaborate with the team on technical solutions, architecture, and continuous platform improvements.

   

What we’re looking for

• 3+ years of commercial experience with C# / .NET
• Strong experience with ASP.NET Core
• Commercial experience with Microsoft Teams integrations
• Hands-on experience with Microsoft Graph API
• Experience with Teams calls, meetings, recordings, or communication APIs
• Experience building REST APIs and integrations with external services
• Good knowledge of SQL and relational databases
• Solid understanding of backend architecture and integration patterns
• Experience troubleshooting production issues
• Ability to work independently and take ownership of technical tasks

• English — B2+

   

Experience that will be highly relevant

For this role, we are particularly interested in experience with:

• Microsoft Graph Communications API
• Microsoft Teams Calls & Meetings APIs
• Teams compliance recording or call-recording solutions
• VoIP and telephony systems
• Voice communication or contact center products
• Real-time audio or media processing
• WebRTC
• SIP / RTP
• SignalR / WebSockets

• Azure

   

What we offer

• Flexible work format — remote or hybrid, with an office in Lviv
• 18 paid vacation days + 5 sick days
• 10 additional days off per year
• Regular performance reviews and feedback
• Professional growth and development opportunities
• Mentorship and support from experienced colleagues
• Accounting support
• Free lunches at the office
• Team events and company gifts

• Anniversary gifts

   

If you have strong .NET backend experience and have worked hands-on with Microsoft Teams, Microsoft Graph, calls, meetings, recordings, VoIP, or voice communication systems, we’d be happy to hear from you.

About the Role

We are expanding our team and looking for a PHP Developer to join our RnD department. You will work on developing and maintaining internal products, including CRM systems, CMS, marketing tools, and backend services that support multiple business units.
This is an excellent opportunity to work on high-load systems, modern microservice architecture, and large-scale data processing while collaborating with experienced engineers across multiple teams.

Who We Are

Our RnD department is a key driver of innovation in the company, consisting of multiple teams that develop CRM systems, marketing tools, CMS, payment solutions, and internal platforms. We focus on automation, scalability, and performance, building systems that support business growth across multiple products and regions.

Why Join Us?

• You'll work on high-load backend systems that process large volumes of data.
• You'll participate in designing new services and improving existing architecture.
• We use modern technologies, microservices, queues, and cloud infrastructure.
• You'll collaborate closely with architects, DevOps engineers, frontend developers, QA engineers, PMs, and Business Analysts.
• We encourage knowledge sharing, code reviews, and continuous technical improvement.
• You'll have opportunities for professional growth while working on complex engineering challenges.

Requirements
 

Must-Have:

• 2+ years of commercial experience with PHP 7+.
• Strong knowledge of MySQL and PostgreSQL.
• Experience developing REST APIs.
• Experience working with queue systems such as Redis, Beanstalkd, RabbitMQ, or similar.
• Experience with Gitlab/Github.
• Understanding of OOP principles, SOLID, and common design patterns.

Nice-to-Have:

• Commercial experience with Phalcon/Spiral.
• Experience with Kafka or other event streaming platforms.
• Experience with Docker and containerized environments.
• Basic knowledge of Kubernetes.
• Experience working with Elasticsearch or MongoDB.
• Understanding of microservice architecture.
• Experience with CI/CD pipelines.
• Experience working with high-load applications.
• Experience configuring web servers (Nginx).

Responsibilities

• Develop and maintain backend applications and microservices.
• Design, develop, and support REST APIs.
• Work with large datasets and optimize application performance.
• Refactor and improve existing codebase.
• Integrate internal and third-party services.
• Participate in architecture discussions and technical planning.
• Collaborate closely with frontend developers, QA engineers, DevOps, architects, and PMs.
• Participate in code reviews and follow established development standards.

Benefits

• 18 business days of paid vacation + public holidays compensation.
• Insurance Fund of the company.
• Partial coverage of professional courses.
• Coverage of sick leaves, sports activities, and English language courses.

Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimising 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.

Main Responsibilities

– 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

– Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems

Mandatory Requirements

– 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, Python, C#, C++) who are ready to ramp up quickly

– Strong understanding of asynchronous programming and concurrency patterns

– Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks)

– Experience with gRPC in production environments

– Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB)

– Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes

– Skilled in building and maintaining unit and end-to-end tests

– Proven track record of delivering production-ready solutions

– Experience working with large-scale microservices architectures

– Degree in Computer Science or a related field (or equivalent practical experience)

Nice to Have

– 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 practice

We offer

– Competitive Salary

– Quarterly Bonuses

– Unlimited Paid Time Off

– Unlimited Paid Sick Leave

– Remote & Flexible Working

– Private Medical Insurance

– Financial Support for Life Events

– Professional Development Budget

– International Exposure

– Regular Company Events

*Benefits may vary depending on location and contractual agreement

Our partner is a leading B2B iGaming supplier delivering engaging casino content to regulated markets worldwide. Since 2012, they’ve been building high-quality gaming experiences through a modern cloud-native platform that powers hundreds of operator brands across multiple jurisdictions.

Their Platform Solutions team sits at the heart of that ecosystem, enabling seamless integrations between the company, operators, aggregators and platform providers.

Our partner is looking for a Senior Backend Developer who thrives in a deeply hands-on environment and enjoys being close to the code on a daily basis. This role is heavily focused on building, optimising, and scaling backend services in a high-load system where performance and reliability are critical.

You’ll be working on complex, real-time challenges at the core of their platform – improving latency, ensuring high availability, and making systems more efficient at scale. This is not a coordination-heavy role; it’s for someone who enjoys writing production code, solving tough engineering problems, and seeing the direct impact of their work.

Main Responsibilities

• Work as part of a cross-functional team owning a core product within the platform
• Design, build, and deliver new backend features end-to-end in a distributed environment
• Write high-quality, production-level code daily, contributing directly to a high-load, scalable system
• Take ownership of services handling financial transactions at scale, with a strong focus on reliability
and accuracy
• Proactively suggest and implement improvements in architecture, processes, and development
practices
• Participate in code and architectural reviews to maintain high engineering standards
• Solve complex business and technical challenges with pragmatic, efficient solutions
• Participating in on-call rotations within the squad to ensure the reliability and availability of our
systems
• Play an active role in ongoing tech transformation initiatives across the platform
• Collaborate closely with engineers, product, and other stakeholders to deliver impactful solutions
used by millions globally

Mandatory Requirements

• Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP
languages such as Java, Python, C++, C#, or Go.
• Strong understanding of asynchronous programming techniques
• Experience with distributed systems and messaging systems (Apache Kafka, gRPC)
• Knowledge of relational databases (MySQL, PostgreSQL), columnar databases (ClickHouse), and
NoSQL technologies (DynamoDB, MongoDB)
• Skilled in developing and maintaining end-to-end and unit tests
• Proven track record of developing production-ready solutions
• Degree in Computer Science or related field

Nice to Have

• Experience with large-scale microservices architecture.
• Good ground knowledge of Kubernetes
• Familiarity with cloud providers (especially AWS)
• Understanding of application security and industry best practices
• Understanding of enterprise development patterns
• Active performance observation
• Gambling domain experience

We offer

• Competitive Salary
• Quarterly Bonuses
• Unlimited Paid Time Off
• Unlimited Paid Sick Leave
• Remote & Flexible Working
• Private Medical Insurance
• Financial Support for Life Events
• Professional Development Budget
• International Exposure
• Regular Company Events

Our partner is a leading B2B iGaming supplier delivering engaging casino content to regulated markets worldwide. Since 2012, they’ve been building high-quality gaming experiences through a modern cloud-native platform that powers hundreds of operator brands across multiple jurisdictions.

Their Platform Solutions team sits at the heart of that ecosystem, enabling seamless integrations between the company, operators, aggregators and platform providers.

Our partner is looking for a Senior Backend Developer who thrives in a deeply hands-on environment and enjoys being close to the code on a daily basis. This role is heavily focused on building, optimising, and scaling backend services in a high-load system where performance and reliability are critical.

You’ll be working on complex, real-time challenges at the core of their platform – improving latency, ensuring high availability, and making systems more efficient at scale. This is not a coordination-heavy role; it’s for someone who enjoys writing production code, solving tough engineering problems, and seeing the direct impact of their work.

Main Responsibilities

• Work as part of a cross-functional team owning a core product within the platform
• Design, build, and deliver new backend features end-to-end in a distributed environment
• Write high-quality, production-level code daily, contributing directly to a high-load, scalable system
• Take ownership of services handling financial transactions at scale, with a strong focus on reliability
and accuracy
• Proactively suggest and implement improvements in architecture, processes, and development
practices
• Participate in code and architectural reviews to maintain high engineering standards
• Solve complex business and technical challenges with pragmatic, efficient solutions
• Participating in on-call rotations within the squad to ensure the reliability and availability of our
systems
• Play an active role in ongoing tech transformation initiatives across the platform
• Collaborate closely with engineers, product, and other stakeholders to deliver impactful solutions
used by millions globally

Mandatory Requirements

• Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP languages such as Java, Python, C++, C#, or Go.
• Strong understanding of asynchronous programming techniques
• Experience with distributed systems and messaging systems (Apache Kafka, gRPC)
• Knowledge of relational databases (MySQL, PostgreSQL), columnar databases (ClickHouse), and
NoSQL technologies (DynamoDB, MongoDB)
• Skilled in developing and maintaining end-to-end and unit tests
• Proven track record of developing production-ready solutions
• Degree in Computer Science or related field

Nice to Have

• Experience with large-scale microservices architecture.
• Good ground knowledge of Kubernetes
• Familiarity with cloud providers (especially AWS)
• Understanding of application security and industry best practices
• Understanding of enterprise development patterns
• Active performance observation
• Gambling domain experience

We offer

• Competitive Salary
• Quarterly Bonuses
• Unlimited Paid Time Off
• Unlimited Paid Sick Leave
• Remote & Flexible Working
• Private Medical Insurance
• Financial Support for Life Events
• Professional Development Budget
• International Exposure
• Regular Company Events

UNITY-BARS - українська ІТ компанія, яка спеціалізується на розробці та впровадженні банківського програмного забезпечення та фінансових установ, у пошуках  Middle - Senior .NET Developer 

Необхідно:

• .NET, .NET Core; 
• Web API; 
• RxJS; 
• Entity Framework; 
• Angular; 
• NgRx; 
• Reactive Forms; 
• REST API; 
• EF Core; 
• DI (dependency injection); 
• SOLID principles; 
• HTML & CSS;
• JWT; 
• Досвід роботи від 2х років. 

Буде перевагою: 

• Технічна освіта (Інформаційні технології, комп’ютерні науки та ін.); 
• Досвід роботи з Kafka (на рівні принципів producer/consumer) та SignalR. 

Що будемо робити:

• Розробка інтеграційного модуля; 
• Адаптація існуючих рішень. 

Ми пропонуємо: 

• Офіційне працевлаштування;
• Змішаний графік роботи;
• Медичне страхування;
• Корпоративні курси англійської;
• Проєкти для країни та комерційного ринку, а також можливість постійного навчання та розвитку. 

Етапи підбору: співбесіди (онлайн) soft skills /hard skills / final

Job Description

Key Responsibilities

Architecture & Delivery: Lead the end-to-end design, implementation, and optimization of enterprise Azure cloud solutions, taking full ownership of project outcomes from concept to production.

DevOps & Infrastructure as Code: Build, maintain, and scale automated CI/CD pipelines and infrastructure deployments using Bicep, Azure DevOps, and modern git-based workflows.

Technical Leadership & Mentoring: Act as a principal-level engineering guide, delegating technical tasks to junior team members, conducting thorough code reviews, and fostering engineering best practices.

Compliance & SDLC Execution: Design and enforce secure software development lifecycles (SDLC) tailored to the stringent security, governance, and audit requirements of a professional services environment.

Stakeholder & Cross-Time-Zone Collaboration: Work directly with senior stakeholders and technical counterparts across EMEA and US Eastern time zones, translating business requirements into robust architectural designs.

Job Responsibilities

Infrastructure as Code: Extensive, hands-on experience using Bicep for provisioning and managing Azure infrastructure.

Domain Experience: Proven track record working within professional services, financial institutions, banking, or similarly regulated environments with strict governance and SDLC standards.

Seniority & Autonomy: Demonstrated background operating as a Principal/Lead Engineer with a proven ability to work independently, manage delivery risks, and drive technical decision-making.

Communication: Great written and verbal English communication skills, with the ability to convey complex architecture concepts to non-technical stakeholders.

Time Zone Flexibility: Based in the EMEA region, with willingness to adjust working hours to support key project partners in the US Eastern Time zone.

Nice to have:

Certifications: Microsoft Certified: Azure Solutions Architect Expert AND Microsoft Certified: DevOps Engineer Expert.

Department/Project Description

We are seeking a high-performing Principal Azure Architect & DevOps Engineer to lead the architecture, automation, and delivery of cloud solutions for one of the world's leading networks of independent assurance, tax and advisory firms.