Jobs

We are bill_line – a fintech company with global focus. Born in Ukraine, we’re steamrolling the world of payments all over the world.

Our main product is a payment solution for any online business, and we’re polishing it to perfection every single day. Any business that needs to accept payments is a bill_line partner: from a small online store to banks, insurance companies or charities.

Why us?

bill_line is a “swiss army knife” in the world of fintech for any client. This means our bizdev, support, legal and finance departments are always with our merchant – from a connection request to integration and transaction support.

We’re proud of our approach and its results. But every success is a puzzle, and only the best team in the world can put all its pieces together.
Do you want to be a part of it and change the Ukrainian and international fintech market? 

We are looking for a strong middle developer with expertise in Python (Django/FastAPI), Vanilla JS, and Bootstrap to join our team. 

Key Responsibilities

• Develop and maintain web applications using Python (Django/FastAPI) and Bootstrap.
• Work with databases (PostgreSQL, MongoDB, Redis for storing) to ensure data integrity and performance.
• Build and integrate RESTful APIs and handle backend logic.
• Debug, troubleshoot, and optimize application performance.
• Participate in code reviews and continuously improve code quality.

Requirements

• 4+ years of experience with Python (Django/FastAPI), Vanilla JS, and Bootstrap.
• Strong understanding of REST API development and integration.
• Experience working with relational and non-relational databases (PostgreSQL, MongoDB, Redis for storing). 
• RabbitMQ MessageQueue will be a big plus.
• Experience with Docker and CI/CD pipelines.
• Knowledge of AWS (EC2, S3, Lambda) or other cloud services.
• Familiarity with Git and version control best practices.
• Ability to work in a team-oriented environment and communicate effectively.

• English level: B2+

  
  💡What we offer

• 🌐Our HQ is in invincible Kyiv, near the Zvirynetska metro station. We also have a cool EU office if you’re relocated.
• 👨‍💻You will instantly have everything you need to work (the best equipment, necessary subscription services and everything that will make you effective).
• ⚡Remote work.
• 🏖️We have 24 days of paid vacation. If you are a workaholic and have not used it, we’ll compensate you with money;
• 💊We pay sick leave in full.
• 🥗 Corporate lunches.
• 👩‍🔬Mandatory health insurance.

• 🧘‍♀️Sessions with psychologists - we support mental health.

  
  💡 How we have fun

  The best team is our main asset and a reason for pride. Your future colleagues love active recreations, sharing impressions of a movie or listening to their favorite music together. We often end the working week with fun Friday mini-parties with colleagues.

  
  💡 People care

  Our  internal corporate culture is based on caring: we support each other, and the company helps colleagues to grow professionally.

  We care about the health of our colleagues and hold Health Days.
   

  💡 Training and development

  We regularly participate in top international fintech, e-commerce, crypto conferences, meetings.

  We pay for training (courses, trainings, seminars) for professional growth and team development.

  We support you in learning English or other languages, especially for expansion into new markets!

Remote | Full-time | EU/UK Time Zones Preferred

TL;DR: We’re building tools that make qualitative research faster, deeper, and more scalable. If you love building great software and want to shape something from the ground up — let’s talk.

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We're building a powerful tech platform to help researchers scale qualitative research using video, AI, and mobile tools. Think: Notion meets Descript for user research.

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This product lives inside Propellerfish, a dynamic, 16 year old, innovation consultancy based in London. While we're not a traditional startup, we operate like one: lean, fast, and obsessed with building great tools that solve real problems. You’ll join a tight-knit team that’s shipped real product and worked with global clients — now we’re scaling what we’ve built into something bigger.

We're looking for a founding-level engineer to bring structure, speed, and polish to the product. You'll work alongside an existing engineer (who built the MVP), but take the lead in improving architecture, quality, and velocity — and potentially rebuild our mobile app from scratch.

🛠️ Stack

• Frontend: Angular, TypeScript
• Backend: Node.js, Express, MongoDB
• Mobile: React Native (open to rewrite)
• Infra: AWS, Docker, Kubernetes
• AI: Whisper, RAG pipelines, OpenAI

• CI/CD, unit/integration testing

   

✅ Your Role

• Ship clean, reliable features quickly
• Refactor messy parts of the stack, improve tests, review flow, deployments
• Lead or rebuild our mobile app
• Work directly with the founder + small team to shape product direction
• Help raise engineering standards (code reviews, documentation, testing)

🙀 We’re Looking For

• 5+ years experience as a full-stack engineer or early-stage builder
• Strong with JavaScript/TypeScript, Node.js, and modern web stacks
• Hands-on experience with mobile dev (React Native, Flutter, or native)
• Experience with CI/CD, code reviews, infrastructure best practices
• Based in UK or EU time zones (for daily overlap)

💸 What We Offer

• Remote-first, async-friendly culture
• Competitive salary
• Real product ownership & creative freedom
• The stability of an established consultancy with the excitement of building new tech
• Get to know each other over a fixed contract and ideally upgrade to a permanent role on our team

📩 How to Apply

Send a short intro and a link to your GitHub/portfolio/LinkedIn to [your email or Djinni inbox]. 

We keep the process simple and human.

Exciting Opportunity Alert!
We’re on the lookout for a Senior or Lead Full-Stack Engineer to join an enterprise-grade product team working with .NET, Microsoft Service Fabric, and data-heavy applications.

This is a long-term project with a global company building highly scalable systems — think distributed architecture, microservices, real-time data processing, and mission-critical stability.

What we’re looking for:

• .NET Core / ASP.NET expertise
• Experience with MS Service Fabric (or willingness to ramp up quickly)
• Strong backend + solid frontend fundamentals
• Azure cloud knowledge is a big plus

• Strong English and proactive communication

   

If you're based in Brazil, Bulgaria, Colombia, Georgia, Hungary, Lithuania, Poland, Romania, or Uzbekistan, and have solid experience with distributed systems — this one's for you.

Poland-Based Full-Stack Engineers — We Need You!

We’re hiring a Senior or Lead Full-Stack Developer skilled in Angular + .NET to join a high-impact digital transformation project. You'll work in a mature agile environment, collaborate with cross-functional teams, and help scale a next-gen enterprise platform.

Ideal profile:

• Deep experience with Angular (13+) and .NET Core
• Solid understanding of RESTful APIs and microservices
• Familiarity with Azure DevOps and CI/CD pipelines
• Independent mindset, leadership qualities, and clean coding habits
• Based in Poland (required)

This role offers stable engagement, challenging tasks, and the chance to influence key product decisions from day one.

We are currently looking for a Senior Full Stack Developer (TypeScript / Next.js / NestJS) to join our remote team and contribute to building and scaling high-traffic digital platforms.
You will work closely with Product Managers, Designers, and fellow Engineers to ensure delivery of robust, scalable, and pixel-perfect applications with clean architecture and excellent performance.

RESPONSIBILITIES:

• Develop and maintain full-stack applications using TypeScript, Next.js (frontend), and NestJS (backend)
• Translate Figma and design specs into pixel-perfect, responsive UIs
• Optimize front- and backend performance for speed, scalability, and SEO
• Build and maintain scalable and secure PostgreSQL data models
• Implement i18n/localization for multilingual SaaS platforms
• Conduct code reviews and mentor team members
• Integrate 3rd-party APIs and services
• Contribute to CI/CD and Agile best practices
• Collaborate closely with cross-functional remote teams

REQUIREMENTS:

• 5+ Years of full-stack development experience
• Strong expertise in TypeScript across the stack
• Deep hands-on experience with Next.js and NestJS
• Experience with PostgreSQL and scalable data design
• Proven track record delivering pixel-perfect UIs from mockups
• Understanding of web performance tuning and accessibility
• Familiarity with i18n/localization best practices
• Strong communication skills and ability to work independently

NICE TO HAVE:

• Experience with Stripe, PayPal or other payment gateway integrations
• Familiarity with CI/CD pipelines, Docker, or AWS
• Experience with SaaS platforms or multi-tenant systems

WHAT WE OFFER:

• Long-term, full-time contract (B2B)
• Fully remote work setup
• 22 paid vacation days + national holidays based on your country
• Working hours (between 7:00–18:00 Bulgaria time)
• Annual performance bonus
• Upskilling and learning budget
• Opportunity to work on fast-scaling international SaaS products
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
   

Key Requirements:

• At least 4+ years of commercial experience as a Full-Stack Developer;
• Experience with PHP and object-oriented programming principles;
• Strong knowledge of Vanilla JavaScript (ES5/ES6);
• Web Concepts — DOM manipulation, HTML rendering, Basic Web APIs and HTML page structure;
• Familiarity with client/server architecture (MVP) and debugging tools like xdebug and browser dev-tools;
• Hands-on experience with MySQL or other relational databases;
• English — Upper-Intermediate or higher.

Will be a plus:

• Experience with React.js;
• Hands-on knowledge of Redis;
• Background in AdTech (SSP/DSP, DFP, header bidding, floor price optimization, etc.);
• Familiarity with Agile methodologies.

What you will do:

• Work on publisher integrations — customizing video player behavior, visual modifications, and player API usage across various environments;
• Develop and maintain backend operational tools for debugging, monitoring, and platform support;
• Participate in publisher onboarding — player setup, content API integrations (MRSS), and bulk operations;
• Build and optimize content and ad targeting solutions using key/value targeting and custom HTML tags;
• Investigate and resolve complex bugs in both frontend and backend systems;
• Work on performance optimization and SEO improvements (Web Vitals, DevTools analysis);
• Research, develop, and document new features and enhancements for long-term stability and scalability;
• Contribute to monetization logic — implement new integrations, data research, and advanced backend fixes.

Why Join Us?

• Be part of a friendly international team, working together on interesting global projects;
• Enjoy many chances to grow, learn from mentors, and work on projects that make a real difference;
• Join a team that loves fresh ideas and supports creativity and new solutions;
• Work closely with clients, building great communication skills and learning directly from their needs;
• Thrive in a workplace that values your needs, offering flexibility and a good balance between work and life

Akvelon is a known USA company, with offices in places like Seattle, Mexico, Ukraine, Poland, and Serbia. Our company is an official vendor of Microsoft and Google. Our clients also include Amazon, Evernote, Intel, HP, Reddit, Pinterest, AT&T, T-Mobile, Starbucks, and LinkedIn. To work with Akvelon means to be connected with the best and brightest engineering teams from around the globe and working with an actual technology stack building Enterprise, CRM, LOB, Cloud, AI and Machine Learning, Cross-Platform, Mobile, and other types of applications customized to client’s needs and processes.

We are looking for a proactive Middle Full-Stack engineer for a large-scale logistics and maritime industry project. The project focuses on developing innovative software solutions to optimize cargo operations, improve efficiency, and streamline logistics processes for ports and terminals worldwide.

Requirements:

• 3+ years of experience with JavaScript and TypeScript
• Experience with Node.js in a backend environment
• Experience with React
• Solid understanding of RESTful APIs and backend architecture
• Experience working with Kafka for event-driven or message-based systems
• Familiarity with version control tools, especially Git
• Strong problem-solving skills and attention to detail
• Excellent communication and teamwork abilities
• English proficiency at least at an intermediate level

Working conditions and benefits:

• Paid vacation, sick leave (without sickness list)
• Official state holidays — 11 days considered public holidays
• Professional growth while attending challenging projects and the possibility to switch your role, master new technologies and skills with company support
• Flexible working schedule: 8 hours per day, 40 hours per week
• Personal Career Development Plan (CDP)
• Employee support program (Discount, Care, Health, Legal compensation)
• Paid external training, conferences, and professional certification that meets the company’s business goals
• Internal workshops & seminars
• Corporate library (Paper/E-books) and internal English classes.

For UA or Ukrainians in EU

We are seeking a Full Stack Engineer (Java) to join our international team and contribute to a large-scale, cloud-based digital assessment platform. 

Used by educational and government institutions worldwide, the platform covers the full exam lifecycle: from authoring and delivery to grading and feedback. 

Our mission is to make assessments more fair, inclusive, and secure.

Must have:

• 8+ years of hands-on Java development experience
• Strong backend skills: REST APIs, Elasticsearch, SQL
• Solid experience with relational databases (preferably Oracle DB), including optimization
• Experience in front-end development with React.js, Redux, and JavaScript
• Proven knowledge of AWS: EC2, S3, Lambda, DynamoDB, ElasticSearch, CloudWatch, SQS
• Strong Git skills and experience in agile teams (Scrum or Kanban)

Nice to have:

• Docker and Kubernetes knowledge
• Testing with Puppeteer, Chai, Mocha
• CSS libraries (e.g., Material UI)

What You’ll Be Doing

• Design, build, and maintain scalable Java-based backend services
• Create performant SQL queries and database logic (procedures, indexing, optimization)
• Develop responsive React.js components and connect them with backend systems
• Work closely with AWS infrastructure and microservices
• Implement front-end testing, ensure accessibility and performance
• Lead code reviews and help mentor junior developers
• Contribute to CI/CD pipelines and architecture improvements

About the Project

• Used by global education/government institutions
• High-availability, cloud-native product
• Long-term
• Impact: millions of users worldwide

What We Offer

• Diverse project tasks and responsibilities
• Free English courses
• Ongoing professional development & training
• All You Can Move wellness benefit

MIT spinoff seeks extremely talented full stack developer to help pioneer AI in the education industry.

You must have experience designing and building large and complex (yet maintainable) systems, and you should be able to do so in about one-third of the time that most competent people think possible.

You should have or be currently pursuing a BS, MS or PhD in computer science or the equivalent.

Top notch communication skills are essential.

Expect talented, motivated, intense, and interesting co-workers.

We are an agency that assists clients in developing their MVPs and evolving them into complete, production-ready products.

We’re looking for a Middle+/Senior Full Stack(Node.js + React) developer, preferably with a back-end (Node.js) oriented skill set.
 

Requirements:

• At least 3+ years of commercial working experience;
• Node.js;
• NestJS
• React.js / Next.js
• JavaScript / TypeScript;
• MongoDB
• AWS / Google Cloud
• English: Pre-Intermediate+.

Good to have:

• Experience with microservices
• MUI
• Kafka
• Redis
• Experience with writing unit and integration tests with a focus on effectiveness and not coverage
   

Responsibilities:

• Maintaining and adding new features to our existing projects.
• Build new projects from scratch.
• Take ownership of the end-to-end development process for software components/services, including research, design, development, testing, rollout, and monitoring.
• Participate in code reviews

Insiders is a fast-growing IT company which employs about 200 people. Our company focused on providing innovative digital services and cutting-edge technologies to solve complex business challenges.

We are located in Lviv and currently work in an office format. For candidates from other cities, we offer relocation (an apartment located near the office, this option is free).

What we expect from the candidate:

•Solid understanding and ability to the practical application of HTML/CSS, JavaScript and TypeScript. 

•Solid understanding of React/Next.js. 

•Proofed experience in Node.js with Express.js and Nest.js frameworks.

 •Knowledge of MySQL, PostgreSQL, MongoDB and Redis.

•Deep knowledge and understanding of networking - REST API standards, HTTP/HTTPS methods. 

•Experience with Git. 

what we offer:

- free study in our Corporate English Academy

- growth and development opportunities for young developers even if you have no commercial experience

- regular salary review (after the completion of each contract)

- provision of Apple equipment

- comfortable office with all amenities not far from the center (uninterrupted internet, generator, tea and coffee, pastries).

- timely payment of salaries.

- corporate events, teambuildings, etc.

- working on projects side by side with Senior developers, which will give you the opportunity to learn and develop.

Code&Care — is a successful full-stack development company, which provides clients with high-quality development assistance worldwide.

Now our team has a position for Full stack developer!

Requirements:

• Solid experience with TypeScript across both frontend and backend projects.
• Proficiency with NestJS (preferred) or Node.js/Express.
• Strong knowledge of React for frontend development.
• Hands-on experience with relational databases; PostgreSQL preferred.
• Strong-Intermediate English level.

Nice to have:

• Experience with PowerBi, visualisation tools

Responsibilities:

• Build and maintain an internal dashboard to provide clients with real-time visibility into our processes, reducing reliance on email, Slack, or calls.

   

What the company offers:

• Constant and interesting work with foreign clients;
• Flexible working hours;
• Annual paid 30 days vacation and paid sick day;
• 50% cost compensation of sports, English lessons.

Our client provides a technology-driven, customer-centric and sustainable approach to ecommerce and last-mile logistics for businesses of all sizes – from local brands to large national retailers. They are building North America’s largest electric vehicle fleet to help bring sustainability to an industry notorious for its heavy impact on the environment. They are in high growth mode and building for the future, which is where you may come in.

On behalf of the client we are looking for a self-starter Full Stack Developer who shares the client's passion for Customer Obsession. In this dynamic role, you will play a crucial part in bringing fresh ideas from all areas, leading technical discussions and project implementation, and providing insight with regards to project planning, estimation, and prioritization.

Key responsibilities:

- Work cross functionally to deliver software and data modeling solutions to solve customer workflow challenges;
- Contribute to product reviews to identify requirements and use-cases, while managing project priorities, deadlines, and deliverables;
- Evaluate new technologies and tooling to improve architecture, performance, and security;
- Build and execute on best-practices around code convention, release management, and infrastructure;
- Take initiative and be responsible for technical solutions to data quality and workflow challenges

Minimum requirements:

- 3+ years of commercial work experience with backend development using Ruby on Rails;

- 2+ years of commercial work experience with frontend development using JavaScript/TypeScript;

- Demonstrated experience with cloud technologies (AWS, GCP), and CI/CD pipelines;

- Excellent communicator, self-driven mindset, recognizing opportunities to advance your craft and profession, learning from mistakes and moving beyond them;

- Strive to implement best-practices, holding a strong interest in sharing your discoveries and methodologies with those around you;

- Ability to learn other coding languages as needed;

- Ability for daily working time overlap (3+ hours) with North American colleagues (EST hours);

- Ability and willingness to take on a live coding challenge during your job interview;

- Upper-intermediate or higher level of English

Will be a plus:

- Work experience with React

Benefits:

- Working for one of the fastest-growing companies in North America;

- Ownership end-to-end: responsibility from design to deployment;

- Professional team, passionate people, English-speaking environment;

- Ability to influence the product, implement your ideas and see the results

Company offers:

- Long-term employment with possibilities for professional growth

- Fully remote work

- Reasonably flexible schedule

- 15 days of paid vacation

- Sick leaves

- Regular performance reviews

Quriobot is looking for a passionate and experienced Full-Stack Engineer to join our team and help us build the future of conversational automation.

What You'll Do

Develop scalable backend services using Node.js and Golang
Design and implement modern, responsive UIs
Manage and deploy infrastructure using AWS
Collaborate cross-functionally to deliver high-quality features from concept to production
Contribute to architectural decisions and technical planning

What We’re Looking For

Strong proficiency in JavaScript, TypeScript, HTML, CSS, and ReactJS
Solid experience with Node.js, Golang, and AWS
Profound understanding of web application architecture and performance optimization
Experience with RESTful and GraphQL APIs
Skilled in working with relational databases (MySQL)
Familiarity with CI/CD pipelines and DevOps practices
Strong foundation in computer science principles and clean coding
Excellent problem-solving and communication skills

Nice to Have

Experience with event-driven architectures
Proficiency with Docker and container orchestration tools
Exposure to high-traffic or internationalized applications
Interest in conversational AI and chatbots
A good sense of design and user experience

What We Offer

💰 Salary: €6,000 gross/month
🌍 Location: Remote (EU residency required)
📄 Contract: Full-time as an independent contractor
💡 Work on a modern tech stack in a product-driven environment
🧠 Opportunities to grow and shape a rapidly evolving product

https://quriobot.com/jobs/full-stack-engineer

Lead Server Developer (Node.js, Firebase, GCP)

Location: Remote
Type: Full-time
Experience: 6+ years

About the Project

At Come On Software we’re building great software solutions. We're looking for an experienced Lead Server Developer to take ownership of our backend architecture and lead a small team of engineers in scaling a robust, high-performance cloud system.

Tech Stack You'll Work With

• Node.js and TypeScript (expert level)
• Firebase, Firestore, Cloud Functions
• Google Cloud Platform (GCP)
• CI/CD pipelines (e.g., GitHub Actions, Cloud Build)
• (Bonus: Azure, Elasticsearch)

What You’ll Do

• Design, develop, and maintain scalable server-side applications and APIs
• Architect efficient data models and optimize performance in Firestore
• Build and maintain Cloud Functions to power backend logic
• Set up and manage CI/CD pipelines
• Collaborate with frontend teams, product managers, and QA
• Lead and mentor a team of backend developers
• Conduct code reviews and drive best engineering practices

• Troubleshoot production issues and ensure system reliability

   

✅ Requirements

• 6+ years of backend/server-side development experience
• Strong expertise in TypeScript, JavaScript, and Node.js (Python is a plus)
• Proven experience with Firebase, Firestore, and Cloud Functions
• Solid experience with GCP and cloud architecture
• Familiarity with testing (unit/integration) and CI/CD
• Leadership experience: mentoring, team guidance, code quality control
• Upper-intermediate English (or higher)

💡 Nice to Have

• Experience with Azure or multi-cloud environments
• Knowledge of Elasticsearch

• Background in performance tuning and scalable API design

   

✉️ Interested?

Send us your CV