Jobs Backend

We’re looking for a Full Stack Developer with a strong backend focus – Node.js and TypeScript at the core, with React and AWS in the stack. You’ll help own features end-to-end, communicate directly with the US-based client, and work in a structured Agile team building an AI-powered platform for functional medicine — covering the full patient journey from lab ordering (500+ biomarkers) and AI-driven analysis to personalized treatment protocols. The platform is live in production and actively evolving.

Stack: Node.js, TypeScript, AdonisJS, PostgreSQL, Redis, React, AWS

Location: Europe or Latin America

Working hours:
Europe-based: 14:00 – 23:00 Kyiv time (7:00 AM — 4:00 PM US ET)
Latin America-based: 9:00 AM – 6:00 PM US ET

Requirements:
3+ years of commercial experience with Node.js and TypeScript
Experience building RESTful APIs and backend services (AdonisJS, NestJS, Express, or similar)
PostgreSQL — schema design, query optimization, migrations, transactions
Redis — caching, queues, pub/sub
React + TypeScript — hands-on experience
AWS — Lambda, S3, RDS, SQS (or similar services)
Docker and CI/CD pipelines (GitLab CI or GitHub Actions)
Solid understanding of software architecture, design patterns, and clean code principles
Strong Git experience and collaborative development workflows
Experience participating in code reviews
Familiarity with Agile/Scrum methodologies
English B2+ — regular communication with the US-based client

Nice to Have:
Experience with third-party integrations in regulated domains (Healthcare, FinTech)
Serverless architecture experience
AI/LLM integrations
Real-time video/audio APIs (Daily.co, Twilio, or similar)

Responsibilities:
Build and maintain backend services and APIs (Node.js, TypeScript)
Develop and enhance React-based user interfaces
Participate in architecture discussions and technical decision-making
Troubleshoot production issues and contribute to CI/CD improvements

What do we offer:
Salary discussed individually based on interview results
Performance reviews are conducted annually
Professional development in a team of highly qualified specialists
Dynamic and interesting work
Opportunities for career and professional development
Strong mentorship offers valuable guidance and support to help individuals grow into skilled specialists
Direct communication with English-speaking clients
Recognition gifts and awards
Employee referral program
Benefit program with the opportunity for compensation to cover the following expenses of their choice:
▪ Sports activities (these can be one-time sessions or monthly or annual subscriptions)
▪ Payment of medical expenses (treatment and preventive procedures at the dentist, services, and consultations with doctors, medical examinations, and tests)
▪ Psychologist consultations
▪ Medical insurance
▪ Training for the development of professional skills (hard and soft skills), including the purchase of necessary educational literature
▪ Courses in traditional arts and creativity (such as drawing, music, photography).
▪ Individual English language improvement classes
21 working days — paid vacations
10 paid sick leaves
 

We are looking for a Python /C++ Software Engineer to join our autonomous systems control team.

This role is a strong fit for an engineer who is comfortable with mathematics, and is interested in growing into control engineering for autonomous systems.

We consider engineers at Middle+ level.

Responsibilities:

• Develop and maintain control and decision-making algorithms for autonomous guidance
• Perform testing in simulation environment and in real life
• Analyze system behavior and logs
• Navigate through research papers and algorithm descriptions in field of autonomous systems and apply them in practice

Required qualifications:

• 3+ years of software development experience in ML, robotics, simulation, gamedev or other algorithmically intensive domains
• Strong programming skills in Python and C++
• Hands on experience with concurrent and parallel programming
• Mathematical background, including: linear algebra (vectors and matrices, coordinat systems and transformations) calculus (derivatives and integrals)

Would be an advantage:

• Control theory fundamentals
• Olympiad programming
• Signal processing
• Machine Learning
• Mavlink
• Simulation tools (Gazebo, AirSim)
• ITL, HITL testing
• X4, Betaflight, ArduPilot

What We Offer:

• Opportunity to work on cutting-edge embedded products
• Competitive salary and benefits
• Flexible working model (remote / hybrid / onsite)
• Professional growth and learning opportunities
• Collaborative and engineering-focused culture

Наш клієнт, Growe, провідна консалтингова компанія та група сервісів у сфері iGaming і розваг. Вони створюють стратегії, що працюють, та рішення, які масштабуються. Поєднуючи стратегічне бачення з практичним досвідом, Growe допомагає бізнесам орієнтуватися в динамічній індустрії, відкривати нові можливості, виходити на нові ринки та досягати сталого зростання.

Ідеально для тих, хто прагне:

• Писати чистий, читабельний код;
• Виконувати як прості, так і складні ініціативи;
• Брати відповідальність за отримані завдання;
• Координувати взаємодію між командами в межах робочих задач.

Досвід, який стане твоєю перевагою:

• 4+ роки досвіду з .NET (C#) у продакшн-системах;
• Сильний досвід роботи з ASP.NET Core Web API та проєктування RESTful API;
• Глибоке розуміння HTTP (таймаути, повторні спроби, ідемпотентність, статус-коди);
• Досвід інтеграції із зовнішніми API;
• Вміння проєктувати інтеграційні шари та модульні системи (clean architecture / onion / прагматичне шарування);
• Глибоке розуміння мікросервісів та архітектури розподілених систем;
• Досвід асинхронної взаємодії та event-driven архітектури;
• Ґрунтовні знання реляційних баз даних (SQL, транзакції, індекси, оптимізація продуктивності);
• Досвід написання unit- та integration-тестів;
• Розуміння автентифікації та авторизації (OAuth 2.0, OpenID Connect).

Ми цінуємо:

• Відповідальність за результат;
• Сильні навички міжкомандної взаємодії;
• Проактивний та відповідальний підхід до роботи;
• Мислення та комунікація на рівні senior-спеціаліста.

Наші клієнти пропонують конкурентні переваги для підтримки вашого професійного та особистого зростання, зокрема:

• Орієнтація на здоров’я та добробут;
• Глобальне медичне страхування;
• Можливості для зростання;
• Програми бенефітів (компенсація спорту / стоматології / психолога тощо);
• Бонуси за досягнення результатів;
• Динамічне робоче середовище.

Долучайся — і нехай твоя історія зростання розпочнеться.

English version

Our client, Growe, is a leading business advisory and services group in iGaming and Entertainment. Сreators of strategies that work and solutions that scale. Combining strategic vision with hands-on expertise, Growe helps businesses navigate the fast-evolving industry, seize new opportunities, enter new markets, and achieve sustainable growth.

Perfect for those who aim to:

• Write clean, readable code;
• Execute both trivial and non-trivial initiatives;
• Take ownership of the received initiative;
• Coordinate cross-team interactions within the framework of task work.

Experience you’ll need to bring:

• 4+ years with .NET (C#) in production systems;
• Strong experience with ASP.NET Core Web API and RESTful API design;
• Strong understanding of HTTP semantics (timeouts, retries, idempotency, status codes);
• Experience with external API integration;
• Ability to design integration layers & modular systems (clean architecture / onion / pragmatic layering);
• Deep understanding of microservices and distributed systems architecture;
• Experience with asynchronous communication and event-driven architecture;
• In-depth knowledge of relational databases (SQL, transactions, indexing, performance tuning);
• Experience writing unit and integration tests;
• Understanding of authentication and authorization (OAuth 2.0, OpenID Connect).

It’s a perfect match if you have those personal features:

• Ownership and accountability;
• Strong cross-team collaboration skills;
• Proactive and responsible approach to work;
• Senior-level mindset in decision-making and communication.

Our clients offer competitive benefits to support your professional and personal growth, including:

• Health & Wellness Focus;
• Global Medical Coverage;
• Growth Opportunities;
• Benefits Programs (compensation for the gym/stomatology/psychological service & etc.);
• Performance-Driven Rewards;
• Dynamic Work Environment.

Apply, and let your growth journey begin.

Client

Our client is an international SaaS company developing tools that empower businesses to create highly engaging digital experiences. Their solutions are trusted by thousands of organizations worldwide to collect, analyze, and act on user data effectively.

Project overview

The project is an interactive form builder designed for marketers, researchers, HR, sales, and customer experience teams to create engaging, conversational online forms, surveys, and quizzes.

Key features:
Visually appealing conversational design optimized for high completion rates
AI-powered data interpretation
Workflow and logic builders for personalized experiences
Brand customization options
Seamless integrations with various tools to automate data collection and streamline workflows

Position overview

We are seeking a Full Stack Engineer who builds with AI in the loop — both as a daily development practice and as a product capability. You are fluent with coding agents (Claude Code, Cursor, Copilot) and ship faster because of them, not despite them. You understand how to design, prompt, evaluate, and operate LLM-backed features in production — including model selection, context engineering, evals, guardrails, and cost and latency tradeoffs.

Beyond AI, you have deep Golang and React/TypeScript expertise and own features end-to-end: from understanding business requirements, through writing and testing code, to deployment and production monitoring. This role requires strong autonomy, proactive communication, and the ability to deliver reliable, scalable solutions in a modern cloud environment.

This position operates according to the CET time zone.

Responsibilities

• Design and ship LLM-powered product features: prompt design, retrieval, tool and function calling, structured outputs, streaming, evaluation harnesses, and guardrails.
• Operate AI features in production: monitor quality, latency, cost, and failure modes; iterate on prompts, models, and architectures based on real usage.
• Use AI coding tools (Claude Code, Cursor, Copilot) as a core part of your workflow to accelerate delivery without compromising code quality.
• Design, develop, and maintain backend services using Golang and frontend applications using React/TypeScript.
• Collaborate with product managers, designers, and other engineers to translate business requirements into technical solutions.
• Implement event-driven architectures leveraging Kafka for real-time data processing.
• Manage and optimize AWS environments, ensuring scalability and reliability.
• Define and maintain infrastructure using Terraform and deploy services in Kubernetes clusters.
• Build and maintain CI/CD pipelines in Jenkins for automated deployments.
• Ensure high-quality code through comprehensive testing and code reviews.
• Monitor application performance and troubleshoot issues in production environments.
• Contribute to UI/UX improvements and ensure seamless integration between frontend and backend.

Requirements

• Demonstrable production experience shipping LLM-powered features. Be ready to walk through a feature you built: prompts, evaluation approach, failure modes you fixed, and how you measured success.
• Hands-on with at least one major LLM provider's API (Anthropic, OpenAI, AWS Bedrock, or equivalent), including streaming, tool use, and structured outputs.
• Daily use of AI coding assistants in your workflow; able to articulate where they help, where they hurt, and how you maintain code quality.
• Strong, in-depth knowledge of Golang.
• Experience delivering complex backend systems from design to production.
• Solid background with Kafka and event-driven architectures.
• Hands-on experience managing AWS environments.
• Proficiency with Terraform for infrastructure-as-code.
• Experience deploying and operating services in Kubernetes.
• Building CI/CD pipelines in Jenkins.
• Proven ability to ensure quality through comprehensive testing.
• Strong proficiency in React and TypeScript.
• Experience contributing to front-end features, UI components, and client-side logic.
• Ability to seamlessly integrate frontend with backend services.
• Excellent English communication skills, written and spoken.
• Self-driven and able to work independently while managing workload effectively.

Nice to have

• Experience with agent frameworks, multi-step tool-use loops, or RAG systems at scale.
• Built or maintained an evaluation pipeline (offline evals, LLM-as-judge, human review loops).
• Open-source contributions, published writing, or talks on applied AI engineering.

ThingsBoard, Inc. is a US corporation founded in 2016, with an R&D center in Kyiv, Ukraine. We are the main contributors and maintainers of the ThingsBoard open-source IoT Platform. We deliver and continuously improve a scalable, robust, and affordable IoT Platform that significantly reduces time-to-market for life-changing IoT solutions. We also help companies build outstanding IoT products based on ThingsBoard.

We are currently looking for a Junior Python Developer who will maintain, update, and advance the company's Python-based products, including the Gateway, Python SDK, REST Client, and Micro/CircuitPython SDK. In this role, you will have the opportunity to work closely with both software and embedded concepts, driving the evolution of our IoT solutions.

What we are looking for:

• Good knowledge of Python 3.10+
• Experience with asyncio
• Experience with threading
• Solid understanding of networking (TCP, UDP, OSI, TLS/SSL)
• Experience with SQLite
• Experience with Docker
• Proficient Linux user
• Knowledge of Git + GitHub
• Knowledge and experience with HTTP + REST protocols

• Intermediate English level + readiness to join client calls if needed

   

Responsibilities:

• Participate in the development, updates, and maintenance of the company's Python-based solutions (Gateway, Python SDK, REST Client, as well as Micro/CircuitPython SDK for embedded devices).
• Analyze, handle, and resolve technical issues from users. Gradually progressing from simple tasks to independently solving complex technical problems.
• Design, propose, and independently implement new features for the IoT Gateway.
• Configure connectivity and integrate various IoT devices into the platform, working with industrial and network protocols.
• Monitor, analyze network traffic, and debug protocols using testing tools.
• Collaborate with the team to solve architectural tasks and communicate directly with English-speaking clients (written in issues and via calls when necessary).

• Actively learn the platform's internal architecture (ThingsBoard, Gateway), new IoT protocols, and embedded concepts; analyze documentation and technical sources to tackle daily challenges.

   

Nice to have:

• Experience with MicroPython / CircuitPython
• Experience with MQTT
• Experience with or knowledge of Modbus, OPC-UA protocols

• Experience with Wireshark

   

What we offer:

• Opportunity to work on an open-source IoT platform with 21k+ stars on GitHub
• Modern, cutting-edge tech stack
• A professional team with 20+ years of experience, free of bureaucracy and micoromanagement
• Career growth opportunities and regular salary reviews
• Full-time on-site position with a flexible schedule
• Medical insurance
• 17 days of paid vacation and 10 days of paid sick leave
• Free English classes
• Comfortable office with a fully stocked fridge (free drinks)
• Work format: Office in Kyiv (Podil)
   

By submitting your CV, you consent to ThingsBoard Inc collecting and processing your personal data for recruitment purposes in accordance with our Privacy Policy and ISO 27001 requirements. Your data will be retained for 12 months from the date of submission and securely deleted thereafter unless you are hired. You may withdraw consent at any time by contacting us.

Are you ready to take your Java expertise to the next level? Join our team to work with a highly scalable, highly available, real-time advertising platform that serves millions of users worldwide and handles massive real-time data at scale. We are hiring a Software Engineer to be a vital part of this mission. If you bring extensive experience building complex systems, love great technology at scale, jumping in, and figuring things out in any system, this role is for you! Working in a modern, cloud-native environment, you’ll collaborate with a team of top engineers to develop low-latency, distributed systems capable of handling millions of QPS. This is an opportunity to combine innovation, performance engineering, and large-scale impact - while shaping the future of digital entertainment technology.
 

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.
 

Who are we looking for?

Skills & Experience

• 4+ years of experience building large scale and low latency distributed systems
• 5+ years of Java backend development experience;
• Solid understanding of algorithms, data structures, performance optimization techniques, object-oriented programming, multi-threading, and real-time programming 
• Experience with distributed caching, SQL/NO SQL, and other databases is a plus 
• Experience with Big Data and cloud services such as AWS/GCP is a plus
• Experience in advertising domain a big plus 
• Self-motivated individual with a high level of accountability and ownership
• Critical thinking and practical decision making
• Can do, results-oriented mindset
• Software development best practices: test-driven development, automated testing;
• Knowledge of distributed systems architecture and service oriented systems;
• English: B2+

Nice to have

• Familiarity with machine learning frameworks (e.g., TensorFlow, PyTorch) and working with large language models (LLMs)

Responsibilities

• Develop and maintain complex backend services
• Collaborate with cross-functional teams (Product, Design, QA) to deliver high-quality features;
• Write unit, integration, and end-to-end tests;
• Maintain and extend existing services to meet new requirements;
• Participate in code reviews and contribute to technical discussions;
• Help maintain technical documentation;
• Assist in improving CI/CD pipelines;
• Contribute to best practices within the development team.

We are building a talent pool of Web3 Backend Developers with EVM expertise for upcoming outstaff projects with international clients 🚀.
 

This is part of our candidate pipeline — there is no specific project at the moment, but once a suitable opportunity becomes available, you'll be matched based on your skills and experience.
 

We're looking for developers who work with Solidity and Node.js / NestJS, understand DeFi protocol logic, and can build reliable on-chain and off-chain infrastructure for EVM-based products.

 

🛠️ Key Responsibilities

🔹 Write, test, and deploy Solidity smart contracts (ERC-20, ERC-721, custom protocols)

🔹 Integrate and build on top of DeFi protocols: Uniswap, Aave, Lido, Chainlink

🔹 Use OpenZeppelin standards and secure contract patterns

🔹 Build off-chain backend services using Node.js / NestJS

🔹 Interact with contracts via ethers.js or viem

🔹 Use Hardhat or Foundry for development, testing, and deployment

🔹 Write unit and integration tests for smart contracts

🔹 Communicate directly with international clients in English

📋 Requirements

🔹 2+ years of commercial experience in Web3/EVM development

🔹 Solid hands-on experience with Solidity

🔹 Proficiency in Node.js / NestJS

🔹 Experience with ethers.js or viem

🔹 Familiarity with Hardhat or Foundry

🔹 Knowledge of DeFi protocols: Uniswap, Aave, Lido, Chainlink

🔹 Understanding of OpenZeppelin contract standards

🔹 English: B2+

🔹 Ability to work independently

✨ Nice-to-Haves

🔹 Familiarity with Layer 2 networks (Arbitrum, Optimism, Base)

🔹 Mainnet deployment experience with high-value contracts

🔹 Multi-sig setup (Gnosis Safe)

🌱 Why Join Our Talent Pool?

🔹 Real Web3 Projects — production-grade smart contracts and backend systems

🔹 International Clients — teams across Europe and North America

🔹 Remote & Flexible — outstaff format, async-friendly

🔹 Blockchain-First Team — we speak the same language

🔹 Fast Matching — when the right project appears, we move quickly

✨ Why This Is a Great Opportunity

🔹 Real-world exposure — every project is different: different chains, different protocols, different challenges

🔹 Outstaff done right — we stay involved, support you throughout the engagement, and match you only where your stack truly fits

🔹 Keep growing — instead of running out of things to do at one company, you move to the next challenge

📬 What Happens After You Apply

🔹 Our team reviews your profile within a few business days

🔹 If there's a good fit, we'll schedule a brief intro call — to learn about your background, stack, and what you're looking for

🔹 After the call, you'll join our talent pool and we'll reach out proactively once a matching project comes up

⚠️ Important

🔹 This is a talent pool position (pipeline)

🔹 No specific project at this moment

🔹 You'll be contacted once a suitable opportunity becomes available

At FuturiX Solutions, we connect skilled blockchain engineers with international Web3 clients — matching you to projects where your expertise matters most 🌐⚙️

We are building a talent pool of Solana Developers for upcoming outstaff projects with international clients 🚀.
 

This is part of our candidate pipeline — there is no specific project at the moment, but once a suitable opportunity becomes available, you'll be matched based on your skills and experience.
 

We're looking for developers with hands-on Rust and Anchor experience who understand Solana's execution model and can build reliable on-chain programs and off-chain infrastructure for production systems.

 

🛠️ Key Responsibilities

🔹 Design, develop, and maintain Solana programs using Rust and Anchor

🔹 Work with PDAs, CPI, authority and signer patterns

🔹 Implement proper account validation, ownership checks, and custom errors

🔹 Write TypeScript / Node.js off-chain integration scripts

🔹 Integrate with Solana DeFi protocols: Jupiter, Jito, and others

🔹 Write unit tests on localnet and integration scripts on devnet

🔹 Build off-chain services: WebSocket subscriptions, bots, background workers

🔹 Communicate directly with international clients in English

📋 Requirements

🔹 2+ years of commercial experience with Rust and Solana on-chain development

🔹 Confident use of the Anchor framework

🔹 Solid understanding of the SVM (Solana Virtual Machine) execution model

🔹 Experience with PDAs, CPI patterns, and account validation

🔹 Proficiency in TypeScript / JavaScript for off-chain tooling

🔹 Hands-on experience with solana-web3.js and SPL Token

🔹 English: B2+

🔹 Ability to work independently

✨ Nice-to-Haves

🔹 Experience with Token-2022 (fees, metadata pointer, freeze authority)

🔹 Familiarity with Raydium AMM / CLMM or Meteora

🔹 Hands-on experience with Jupiter or Jito integrations

🔹 Security-aware development mindset

🔹 Prior experience deploying to Solana mainnet

🌱 Why Join Our Talent Pool?

🔹 Real Solana Engineering — production-grade on-chain programs, not demos

🔹 International Clients — teams across Europe and North America

🔹 Remote & Flexible — outstaff format, async-friendly

🔹 Blockchain-First Team — we speak the same language

🔹 Fast Matching — when the right project appears, we move quickly

✨ Why This Is a Great Opportunity

🔹 Real-world exposure — every project is different: different chains, different protocols, different challenges

🔹 Outstaff done right — we stay involved, support you throughout the engagement, and match you only where your stack truly fits

🔹 Keep growing — instead of running out of things to do at one company, you move to the next challenge

📬 What Happens After You Apply

🔹 Our team reviews your profile within a few business days

🔹 If there's a good fit, we'll schedule a brief intro call — to learn about your background, stack, and what you're looking for

🔹 After the call, you'll join our talent pool and we'll reach out proactively once a matching project comes up

⚠️ Important

🔹 This is a talent pool position (pipeline)

🔹 No specific project at this moment

🔹 You'll be contacted once a suitable opportunity becomes available

At FuturiX Solutions, we connect skilled blockchain engineers with international Web3 clients — matching you to projects where your expertise matters most 🌐⚙️

We invite a Senior Software Engineer I to join our team and help develop new components within a large-scale fintech data platform in the private markets domain. In this role, you'll contribute to the development of blockchain-integrated platform components while working across a complex, distributed system alongside experienced engineers.

🟩 What's in it for you:

• Work on a new component within an established fintech platform with 20+ internal services and 15+ external integrations
• Build production software integrating modern AI technologies and blockchain systems
• Own end-to-end development of complex backend features while collaborating with senior engineers and architects

• Gain exposure to large-scale distributed systems, event-driven architectures, and cutting-edge AI tooling

   

✅ Is that you?

• 5+ years of backend software development experience, with Python as the primary language
• Strong software engineering background in Node.js with TypeScript, with the ability and motivation to work deeply in Python services
• Experience building production AI/LLM applications, including agent-based workflows and orchestration patterns
• Good understanding of AI frameworks and practical trade-offs (experience with LangGraph is a plus)
• Experience developing and maintaining microservices with multiple internal and external integrations
• Strong experience with Kubernetes, Docker, and containerized deployments
• Experience with Infrastructure as Code (Terraform or equivalent)
• Experience with event-driven architectures
• Strong experience with PostgreSQL and practical knowledge of Redis, MongoDB, and Weaviate
• Solid understanding of software architecture and distributed systems
• Strong commitment to clean, maintainable code, automated testing, and engineering best practices
• Experience producing technical documentation (C4, UML, or similar)
• Experience owning features from design through production, collaborating with cross-functional teams
• Hands-on experience with AI-assisted development tools (such as Cursor and Claude Code)
• Strong communication, collaboration, analytical thinking, and problem-solving skills

• Comfortable working in fast-paced environments with evolving requirements

   

⭐ Nice to have:

• Experience with LangChain, MCP tooling, and agent-based integration architectures
• Familiarity with Retrieval-Augmented Generation (RAG) and vector databases
• Experience building AI agents for automation, validation, or data enrichment
• Experience with AWS and/or Azure
• Exposure to cloud-agnostic or private cloud architectures
• Background in fintech, data platforms, or private markets
• Basic understanding of blockchain concepts (L1/L2) and integration through APIs or abstraction layers

We're building analytical instruments for traders, brokers, and retail investors — real-time tools that make sense of the US stock market as it moves. Startup pace, real infrastructure, direct customer impact.

We build with AI in the loop — our engineers use it to move faster and explore further, and we expect the same from you.

What You'll Do

• Build the real-time data layer: ingest market feeds, process tick data, serve low-latency responses to the UI that has to be right and fast at the same time
• Own the customer-facing side: charts, dashboards, analytical instruments that traders and brokers use to make decisions — in Rust where it needs to be fast, in JS/TS where the customer sees it
• Bridge the gap between the high-throughput backend and what renders on screen — you understand both sides and can make them work together without throwing the problem over the wall
• Use AI tools actively in your daily work — code generation, debugging, architecture exploration — and bring genuine curiosity about what they can and can't do

What We're Looking For

Must have:

• Rust — production experience, comfortable owning performance-critical services
• JavaScript or TypeScript — shipped customer-facing interfaces that real users interact with
• Experience with real-time or streaming data — you understand what it means when latency matters and data accuracy is non-negotiable
• You actively use AI tools in your daily workflow and can describe how they've changed the way you work — with genuine curiosity to go deeper
• 3+ years of professional software development, with meaningful time on systems where correctness and performance are both required

Nice to have (we'll work through the rest together):

• Financial domain: trading, market data, order book mechanics, price feeds
• WebSockets or SSE for real-time UI updates
• WebAssembly — especially Rust compiled to WASM for browser performance
• Familiarity with market data protocols or feeds (FIX, broker WebSocket APIs)
• Experience with high-throughput message systems (Kafka, Redpanda, or similar)

Inviting Senior .NET Software Engineer to join a growing account in the medical devices industry domain. Our client is the global leader company of healthcare solutions, which contributes to human welfare by application of biomedical engineering in the research, design, manufacture, and sale of instruments or appliances that alleviate pain, restore health, and extend life for people around the world.

Our team is focusing on designing, developing, and testing embedded software for medical devices, where the software has strong restrictions for safety and quality, power management, and memory usage. Project for this position intends to extend medical device capabilities with PC application that will serve cloud services connectivity for existing device.

Job Description

• 4+ years of experience in C# application development
• Experience with AWS / Azure microservices and contenerisation
• Nice to have experience in Windows standalone appplication development
• Services integration experiences
• Upper-Intermediate English (be able to communicate with the client)
• Good communication skills
   

Job Responsibilities

• Design and development of standalone application that connects and uses AWS & Azure based services
• Develop AWS services
• Coopeare on architecture design
• Participate in new features implementation
• Communicate with the client

On behalf of our Client from France, Mobilunity is looking for .Net Engineer.
 

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.
 

What you will do:

• Performance and stability work: Identify and resolve issues currently degrading the platform — missing or wrong SQL indexes on hot tables, N+1 Cosmos queries, EF Core query plans that fall off the optimiser, queue back-pressure, retry storms.
• Incident response: Act as the escalation point for the product support and dev team. Diagnose and fix issues spanning bookings, widgets, payments (Mollie / Bancontact / iDEAL), webhooks, SignalR notifications, Cosmos DB content, and SQL Server data.
• Production stewardship: Plan and execute releases to production, typically out of customer hours (releases usually go out late evening or around 2 a.m. CET to minimise blast radius). Own rollback strategies and smoke tests.
• Platform upgrade: Plan and execute upgrades to .NET, key NuGet packages (including private feeds), Azure services, and third-party integrations — without disrupting production.
• Targeted feature development: Pick up scoped backend features and changes and ship them safely.
• Internal tooling: Maintain and extend admin site
• Knowledge transfer: We want this role to actively reduce single-point-of-failure risk. You’ll pair with internal engineers, walk them through the system as you fix things, and leave behind enough context — in code comments, PR descriptions, short notes — that the platform is operable when you’re on holiday.
   

Tech Stack:

• .NET / C# (modern versions), Entity Framework Core, ASP.NET Web APIs
• Azure — App Service, Functions, SignalR Service, Service Bus / queues, Application Insights
• SQL Server (Azure SQL) with EF Core, plus direct query and index tuning
• Cosmos DB
• GitHub (Actions, private NuGet feeds), pre-prod and prod environments
• Mollie payments (Bancontact, iDEAL, cards) and other third-party integrations
   

Requirements:

• Deep Azure production ownership — ideally 8+ years where both the application layer and the cloud infrastructure are your domain. Azure is not a deployment target here — it’s part of the system you own.
• Strong DBA instincts. You can read an execution plan, recognise when EF Core is generating something the optimiser can’t use, and design indexes that match access patterns.
• Azure platform depth. Hands-on production experience with App Service / AKS, Azure SQL, Cosmos DB, Service Bus, Application Insights, and Key Vault. You know how to right-size resources, contain costs, and respond to platform-level incidents — not just application-level ones.
• Production maturity. Comfortable owning overnight releases, rollback plans, and the weight of a system where mistakes affect real restaurants in the morning service.
• Diagnostic mindset. At home in Application Insights, SQL DMVs, Cosmos metrics, and logs. Able to find root causes in a codebase you didn’t write, with significant historical complexity.
• Genuine AI-assisted developer. You use Claude Code, Cursor, Copilot, or equivalent daily — not occasionally. You know where the guardrails matter in a complex codebase, and you bring that judgment, not just the tool.
• Communication. Clear written English, transparent about risk, comfortable explaining technical trade-offs to non-technical stakeholders.
• Upper-intermediate to advanced English proficiency
   

Nice to have:

• Experience with restaurant tech, reservation systems, or any high-concurrency consumer-facing platform with payment flows.
• Experience leading the stabilisation or modernisation of a legacy .NET codebase.
• Familiarity with Mollie or similar PSPs and EU payment methods (Bancontact, iDEAL, SEPA).
   

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups
   

Come on board, and let’s grow together!

Our company is looking for talented professionals to join our team and to work full-time as Trainee Java Engineer

You will   

• Write, test, and debug simple Java code under the guidance of senior developers
• Participate in the development of new features and bug fixes.
• Follow coding standards and project guidelines.
• Learn and implement software development lifecycle processes
• Work closely with team members, including developers, testers, and project managers
• Participate in team meetings and code reviews.
• Attend training sessions and workshops to improve skills.
• Participate in daily stand-ups, sprint planning, and retrospectives
  
  You are
• Preferably a higher education degree in IT or related fields.
• Familiarity with RESTful principles and API design
• Experience with SQL: Ability to write basic queries for data manipulation and retrieval.
• Experience with one or more relational databases such as MySQL, SQLite, or PostgreSQL.
• Basic knowledge of Maven for project dependency management and build automation.
• Proficiency in key Java concepts, including Object-Oriented Programming (OOP), Input/Output (IO), Reflection, Collections Framework
• Understanding of basic algorithms and data structures is advantageous.
• Familiarity with writing and executing unit tests to validate code functionality.
• Exposure to Spring concepts, such as dependency injection and basic module configuration.

• English level - B1+

   

We Offer

• Exchange of experience, professional development
• Good office location in Kyiv and Kharkiv with generators and Starlinks
• Co-working compensation
• English classes at company expense
• Partial payment for gym memberships
• Partial payment for courses and certifications
• Regular company events

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

Project: Portfolio management systems for a US financial institution. 

What you will be doing:  

As part of the team, you will be participating in a client project focused on portfolio management solutions. You will help develop new software features, as well as support and maintain existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with third-party web services. You will be collaborating 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 we are looking for:  

• A strong programming background with Python and OOP skills.
• Deep understanding of algorithms and data structures.
• Experience building backend systems and working with REST APIs.
• Proficiency with SQL databases.
• Experience with FastAPI and Linux environments.
• Strong problem-solving skills and ability to collaborate effectively in a team environment.
• Upper-Intermediate level of English or above. 
• Experience with React and AWS is a plus. 

What we offer: 

• Competitive compensation depending on experience and skills. 
• Regular assessments and salary reviews. 
• Paid personal days. 
• Mental health support program. 
• Language classes. 
• Flexible working schedule. 

About the Project

AI Interview Platform (client name undisclosed) — a leading technical interviewing platform used by fast-growing startups and large enterprises worldwide. It pairs experienced engineers with standardized interview frameworks to enable fair, high-signal, and scalable hiring for software engineers globally.

What You'll Do

• Conduct live technical interviews with software engineering candidates worldwide via the platform.
• Assess coding skills, problem-solving abilities, technical knowledge, and communication while creating a professional and inclusive candidate experience.
• Provide structured, objective feedback based on established evaluation criteria to reduce bias and improve hiring quality.

• Collaborate with the client’s team to test, refine, and improve interview content, processes, and platform features.

   

Must Have

• 4+ years of professional experience as a Software Engineer/Developer.
• Strong Python proficiency
• Working knowledge of frontend technologies (JavaScript, React, or similar).
• Solid understanding of algorithms, data structures, and software engineering fundamentals.
• Excellent English communication skills (spoken and written).
• Professional demeanor, ability to deliver objective assessments, and reliable setup (webcam, microphone, stable internet).

Nice to Have

• Prior experience conducting technical interviews (DS&A, system design).
• Mentoring, coaching, or technical leadership experience.
• Interest in talent assessment, interviewing best practices, or inclusive hiring.

Location: EU / Remote (Ukraine)

Type: Freelance full-time (first 3 months), with option to go part-time later.