Jobs Backend

986
  • · 250 views · 56 applications · 19d

    Middle .NET Backend Developer

    Ukraine · Product · 2 years of experience · English - None
    We are searching a skilled and proactive Middle .NET Backend Developer proficient in leveraging AI tools to enhance productivity. You will be responsible for developing, maintaining, and optimizing robust backend applications using .NET and SQL...

    We are searching a skilled and proactive Middle .NET Backend Developer proficient in leveraging AI tools to enhance productivity. You will be responsible for developing, maintaining, and optimizing robust backend applications using .NET and SQL technologies, while effectively utilizing AI tools such as ChatGPT, Claude, Cursor, and similar platforms for prompt-driven development and troubleshooting. Collaboration with frontend developers, system analysts, and project managers will be crucial to delivering integrated, high-quality software solutions.

     

    Responsibilities:
    - Develop, maintain, and optimize backend applications using .NET frameworks and SQL databases;
    - Design, implement, and manage efficient database structures and queries using SQL Server;
    - Use AI tools (ChatGPT, Claude, Cursor, etc.) effectively for problem-solving, coding assistance, and rapid development;
    - Collaborate closely with frontend developers and other team members to implement and integrate APIs;
    - Ensure the reliability, scalability, and performance of backend services;
    - Write clean, efficient, and maintainable code following best practices and industry standards;
    - Participate in code reviews, ensuring code quality and providing constructive feedback;
    - Troubleshoot, debug, and resolve technical issues effectively;
    - Continuously explore and apply modern backend development practices.


    Requirements:
    - At least 2-3 years of professional experience in backend development using .NET;
    - Strong proficiency in C#, .NET Core/.NET Framework;
    - Solid experience working with SQL databases (SQL Server), writing efficient queries, stored procedures, and managing database schemas;
    - Demonstrated proficiency in using AI tools like ChatGPT, Claude, Cursor, or similar for software development tasks and effective prompting;
    - Experience developing and integrating RESTful APIs;
    - Familiarity with ORM frameworks such as Entity Framework Core;
    - Knowledge of software development patterns and best practices (e.g., MVC, Repository, Dependency Injection);
    - Strong problem-solving skills and attention to detail;
    - Good communication skills and ability to collaborate effectively within a team.


    Preferred Qualifications:
    - Knowledge of containerization technologies (Docker);
    - Familiarity with Agile methodologies (Scrum, Kanban) and CI/CD practices.


    What We Offer:
    - Competitive salary and comprehensive benefits package;
    - Opportunities for professional growth and career advancement;
    - A collaborative, inclusive, and supportive work environment;
    - Remote work;
    - Participation in innovative and challenging projects.


    Location: Remote


    Application Process:
    Please submit your resume along with a brief cover letter highlighting your relevant experience and technical skills.

    More
  • · 85 views · 22 applications · 19d

    Senior Python AI Engineer to $7300

    Full Remote · EU · Product · 7 years of experience · English - B2
    Who we are: Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. About the Product: Zenity is the first security governance platform built...

    Who we are:

    Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

     

    About the Product: 
    Zenity is the first security governance platform built specifically for AI Copilots, Low-Code/No-Code applications, and business-led development. Enterprises today create thousands of automations, workflows, copilots, and integrations outside traditional R&D—introducing new, fast-moving security risks. Zenity provides organizations with:

    • Real-time detection of misconfigurations, unsafe data flows, and policy violations
    • Centralized visibility across hundreds of business-driven apps and automations
    • Security guardrails for GenAI and LLM-powered tools
    • Prioritized vulnerability reports and guided remediation

     

    About the Role: 
    Zenity is hiring a Senior Backend Engineer to help drive the evolution of its security platform for AI and Low-Code ecosystems. The perfect candidate will be passionate about building large-scale, cloud-based solutions. You'll be working in a dynamic, Agile setting, helping to drive the ongoing development and enhancement of the platform.

     

    Key Responsibilities: 

    • Design and build backend services powering security governance for GenAI, Copilots, and Low-Code platforms
    • Deliver end-to-end product features used by enterprise customers at scale
    • Develop detection logic, data flows, and validation layers for complex workflows and automations
    • Work with distributed systems, microservices, and cloud-native components
    • Build and optimize SQL schema, queries, data models, and near-real-time processing pipelines
    • Participate in design reviews, collaborate closely with product and security teams, and contribute thoughtful technical decisions
    • Implement security-focused backend solutions that help enterprises adopt AI responsibly
    • Use AI-assisted development tools (Copilot, Cursor, Claude Code, etc.) as part of the day-to-day workflow

       

    Required Competence and Skills:

    • 7+ years of software engineering experience with proven delivery of production features
    • 5+ years of Python, working on core product systems with real user impact
    • Strong SQL fundamentals; hands-on experience with PostgreSQL/MySQL plus familiarity with MongoDB or DynamoDB
    • Experience building distributed systems or microservices, including observability and CI/CD automation
    • Solid cloud background (AWS preferred) and hands-on work with Docker and container-based deployments
    • Practical use of AI-assisted development tools and understanding of context engineering / AI-first development principles
    • Experience contributing to high-scale or customer-facing products
    • Strong communication skills in English, plus experience collaborating with distributed teams
    • Ownership mindset and the ability to take a feature from design to production

     

    Nice to have:

    • Background in data engineering, streaming, or maintaining near real-time data pipelines
    • Experience designing ETL/ELT pipelines or large-scale data systems
    • Hands-on with Kubernetes
    • Experience with workflow orchestration (Temporal, Cadence, or similar)
    • Ability to work across multiple languages (Python + Go or Node.js)

     

    Why Us?

    - We provide 20 days of vacation leave per calendar year (plus official national holidays of the country you are based in).

    - We provide full accounting and legal support in all countries in which we operate.

    - We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

    - We offer a highly competitive package with yearly performance and compensation reviews.

    More
  • · 91 views · 5 applications · 19d

    Senior Azure .NET Software Engineer (business trips)

    Full Remote · Ukraine · 6 years of experience · English - B2
    Our client is a large international enterprise operating at scale in the industrial and manufacturing domain, developing and maintaining a modern cloud-based Core platform. The project focuses on building a new Azure-based cloud solution that supports...
    • Our client is a large international enterprise operating at scale in the industrial and manufacturing domain, developing and maintaining a modern cloud-based Core platform.

      The project focuses on building a new Azure-based cloud solution that supports critical business processes across multiple regions.

      The role involves working as part of a Scrum team on designing, developing, and maintaining high-quality, scalable, and maintainable software solutions in Azure, in close collaboration with developers, UX analysts, and other stakeholders.

     

     

    • Responsibilities:

      • Work together with other Scrum team members on a new cloud solution for the client's Core platform
      • Participate in Scrum planning sessions by analyzing the work to be done
      • Implement new functionality or refactor existing code based on detailed specifications and mock-ups
      • Closely collaborate with other development team members and UX analysts
      • Create technical designs and define the required Azure architecture
      • Support technical decision-making, balancing cost, scalability, and maintainability
      • Write unit tests for newly developed functionality
      • Participate in performing code reviews
      • Report work progress on a daily basis
      • Focus on bug fixing when needed

     

     

    • Mandatory Skills Description:

      • Master's degree in Software Engineering or equivalent experience
      • At least 6 years of proven expertise in designing and developing high-quality software solutions, with a strong emphasis on maintainability and scalability
      • Solid knowledge of Azure Functions, Azure architecture, and containerization
      • Experience with Azure DevOps is considered a plus
      • Proficient in relevant languages and frameworks, including C#, .NET, SQL, HTML, and related technologies
      • Extensive experience in designing and implementing RESTful web services and APIs
      • Strong analytical mindset with the ability to collaborate and contribute to solution design
      • Capable of working independently while knowing when to escalate or discuss challenges and issues
      • Fluent in English, both spoken and written

       

    • Nice-to-Have Skills Description:

      Azure DevOps

       

    • Languages:
      • English: C1 Advanced
    More
  • · 113 views · 7 applications · 19d

    Senior Azure .NET Software Engineer

    Full Remote · Ukraine · 6 years of experience · English - B2
    Project Description: Our client is a large international enterprise operating at scale in the industrial and manufacturing domain, developing and maintaining a modern cloud-based Core platform. The project focuses on building a new Azure-based cloud...
    • Project Description:

      Our client is a large international enterprise operating at scale in the industrial and manufacturing domain, developing and maintaining a modern cloud-based Core platform.

      The project focuses on building a new Azure-based cloud solution that supports critical business processes across multiple regions.

      The role involves working as part of a Scrum team on designing, developing, and maintaining high-quality, scalable, and maintainable software solutions in Azure, in close collaboration with developers, UX analysts, and other stakeholders.

       

    • Responsibilities:

      • Work together with other Scrum team members on a new cloud solution for the client's Core platform
      • Participate in Scrum planning sessions by analyzing the work to be done
      • Implement new functionality or refactor existing code based on detailed specifications and mock-ups
      • Closely collaborate with other development team members and UX analysts
      • Create technical designs and define the required Azure architecture
      • Support technical decision-making, balancing cost, scalability, and maintainability
      • Write unit tests for newly developed functionality
      • Participate in performing code reviews
      • Report work progress on a daily basis
      • Focus on bug fixing when needed

       

    • Mandatory Skills Description:

      • Master's degree in Software Engineering or equivalent experience
      • At least 6 years of proven expertise in designing and developing high-quality software solutions, with a strong emphasis on maintainability and scalability
      • Solid knowledge of Azure Functions, Azure architecture, and containerization
      • Experience with Azure DevOps is considered a plus
      • Proficient in relevant languages and frameworks, including C#, .NET, SQL, HTML, and related technologies
      • Extensive experience in designing and implementing RESTful web services and APIs
      • Strong analytical mindset with the ability to collaborate and contribute to solution design
      • Capable of working independently while knowing when to escalate or discuss challenges and issues

      This position assumes, that employee will be able to travel to client's office in Mechelen, Belgium 1 week every 2 months.

    More
  • · 376 views · 103 applications · 19d

    Fullstack Developer

    Full Remote · Worldwide · Product · 5 years of experience · English - B1
    Netevia is an international high-tech group of companies specializing in mobile payments and value-added transaction services. Netevia's projects enable users to manage their POS terminals, transactions, and reporting, handling everything related to...

    Netevia is an international high-tech group of companies specializing in mobile payments and value-added transaction services.

    Netevia's projects enable users to manage their POS terminals, transactions, and reporting, handling everything related to running a business online.

     

    Key Responsibilities

    • Planning, code reviews, mentoring, and fostering technical expertise.
    • Participate in the design and architecture of integration solutions and implement new functionality in systems with complex business logic.
    • Oversee code quality and ensure adherence to best practices and development standards.
    • Conduct refactoring and optimization of existing solutions.
    • Collaborate effectively with cross-functional teams, including Business Analysts, QA, and DevOps, to meet project goals.
    • Participate in technical interviews and contribute to team formation and growth.

       

    Requirements

    • 5+ years of experience in C# .NET development.
    • Strong understanding of OOP principles, architectural patterns, SOLID, and DDD.
    • In-depth knowledge of ASP.NET, MVC, Entity Framework, and Web API.
    • Frontend JavaScript (или TypeScript), jQuery, Bootstrap, knokout JS (KO) React, Angular, Vue.js (Vue) 
    • Solid experience working with SQL and relational databases.
    • Experience mentoring junior and mid-level developers and leading team collaboration.
    • Strong analytical and system thinking skills, initiative, and decision-making ability.
    • Experience with NoSQL databases such as MongoDB.
    • Experience working with message brokers.
    • Familiarity with cloud solutions (e.g., Azure, AWS).
    • Proficiency in designing and consuming REST and SOAP APIs, and understanding of authentication systems.

       

    What we offer:

    • Remote work with flexible hours.
    • Corporate english group classes
    • Opportunities for career and professional growth alongside the company.
    • Friendly team, flexible communication, and no bureaucracy.
    • Competitive salary based on the level of competencies.
    More
  • · 384 views · 137 applications · 19d

    Node.js Developer

    Full Remote · Countries of Europe or Ukraine · Product · 3 years of experience · English - B2
    United Tech is a global IT product company shaping the future of real-time social connection. With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking. Our...

    United Tech is a global IT product company shaping the future of real-time social connection. With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking. Our platforms enable connection at scale fast, interactive, and deeply engaging. The market is projected to exceed $206B by 2030, and we are already leading the evolution. Founded in Ukraine, scaling worldwide

    About your role: Join us in creating a next-generation global video chat platform. You will join at the start of product development, shaping its architecture and backend without the burden of legacy systems. This is your chance to influence key decisions, work on cutting-edge technologies, and create a cross-platform solution for web and mobile that will scale globally

    In this role, you will

    • Take part in team processes (grooming, sprint planning)
    • Develop and deliver product tasks to the production environment
    • Work on reducing and preventing technical debt
    • Create technical designs for product epics
    • Decompose epics into clear, executable tasks
    • Conduct technical investigations and propose solutions


    It’s all about you

    • 4+ years of commercial experience in backend development
    • 3+ years of experience with Node.js backend development
    • Hands-on experience with relational and non-relational databases (MongoDB, Postgres, Redis)
    • Strong background with SOA/Microservices (communication, development process)
    • Solid understanding of patterns (DDD, event-driven, SOLID, CQRS)
    • Experience working with WebSockets (ws, socket.io)
    • Experience with messaging systems (BullMQ, RabbitMQ, Kafka)
    • Cloud expertise (AWS, GCP, etc.)
    • Proven track record in scaling and high-load products
    • Upper-Intermediate English or higher


    What we offer

    Care and support:

    • 20 paid vacation days, 15 sick days, and 6 additional days off for family events
    • Up to 10 additional days off for public holidays
    • 100% medical insurance coverage
    • Sports and equipment reimbursement
    • Team building events, corporate gifts, and stylish merch
    • Financial and legal support
    • Position retention and support for those who join the Armed Forces of Ukraine
    • Participation in social initiatives supporting Ukraine

    Comfortable working environment:

    • Work from our Kyiv hub or remotely with a flexible schedule
    • Modern equipment or depreciation of your own tools

    Investment in your future:

    • Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
    • 70% of our heads and leads have grown into their roles here — so can you!
    • Performance-oriented reviews and Individual Development Plans (IDPs)
    • Reimbursement for professional courses and English classes
    • Corporate library, book club, and knowledge-sharing events

    Hiring process

    • Intro call
    • Technical Interview
    • Reference check
    • Offer
    More
  • · 135 views · 25 applications · 19d

    Strong Junior Node.js/Golang Developer

    Full Remote · Countries of Europe or Ukraine · 2 years of experience · English - B2
    We’re building a modern SaaS platform used by industrial and energy companies to manage complex, real-world workflows. Our systems handle data, integrations, and transactions that matter, and we’re looking for a Strong Junior Go Developer who wants to...

    We’re building a modern SaaS platform used by industrial and energy companies to manage complex, real-world workflows. Our systems handle data, integrations, and transactions that matter, and we’re looking for a Strong Junior Go Developer who wants to work on reliable, scalable, well-designed backend services.

    What You’ll Do

    • Develop and improve backend services using Golang/Node.js with guidance and support from the team
    • Build and maintain APIs and business logic that power our SaaS platform
    • Write automated tests and help improve monitoring and observability over time
    • Take part in technical discussions and contribute to decisions around existing and future features
    • Work closely with product managers and designers to deliver real customer value
    • Help improve the performance, reliability, and scalability of production systems

       

    What We’re Looking For

    • 2+ years of professional experience in software development
    • Hands-on experience with backend development using Golang/or Node.js
    • Experience building REST APIs (GraphQL is a plus, but not required)
    • Solid understanding of SQL databases, such as PostgreSQL
    • Familiarity with Git, code reviews, and modern development workflows
    • A proactive mindset and willingness to take ownership and learn
    • Good analytical and problem-solving skills
    • Comfortable communicating in English

       

    Nice to Have

    • Experience with Docker and containerized applications
    • Some exposure to Kubernetes or cloud environments
    • Basic understanding of CI/CD pipelines
    • Experience with message queues or event-driven systems

       

    Why Join Us

    • Work on a real product used by global industrial customers
    • Ownership & impact - your code goes to production and matters
    • Remote working model 
    • Learning budget for courses, certifications, and books
    • Supportive engineering culture focused on quality, not chaos
    • Opportunity to grow
    More
  • · 156 views · 57 applications · 19d

    Mid-Level Goland/Node.js Software Engineer

    Full Remote · Countries of Europe or Ukraine · 3 years of experience · English - B2
    We’re building a modern SaaS platform used by industrial and energy companies to manage complex, real-world workflows. Our systems handle data, integrations, and transactions that matter, and we’re looking for a Mid-level Software Engineer who wants to...

    We’re building a modern SaaS platform used by industrial and energy companies to manage complex, real-world workflows. Our systems handle data, integrations, and transactions that matter, and we’re looking for a Mid-level Software Engineer who wants to work on backend services that are reliable, scalable, and well-designed.

    This is a hands-on engineering role where you will work closely with product, frontend, and other backend engineers to ship features that go to production and are actually used.

    What You’ll Do

    • Develop and evolve backend services using Golang and Node.js
    • Build APIs and business logic that power our SaaS platform
    • Write automated tests and help introduce smarter monitoring and observability
    • Participate in key technical decisions for both current and future products
    • Work closely with product managers and designers to deliver real customer value
    • Improve performance, reliability, and scalability of production systems

       

    What We’re Looking For

    • 3+ years of professional software development experience
    • Strong backend engineering skills using Golang and/or Node.js
    • Experience building REST or GraphQL APIs
    • Solid knowledge of SQL databases (PostgreSQL or similar)
    • Comfortable working with Git, code reviews, and modern dev workflows
    • Able to work independently, take ownership, and move things forward
    • Strong analytical and problem-solving mindset
    • Good English communication skills

       

    Nice to Have

    • Experience with Docker and containerized services
    • Exposure to Kubernetes
    • Familiarity with cloud platforms 
    • Experience with message queues or event-driven systems
    • Some DevOps or CI/CD experience

       

    Why Join Us

    • Work on a real product used by global industrial customers
    • Ownership & impact - your code goes to production and matters
    • Remote working model 
    • Learning budget for courses, certifications, and books
    • Supportive engineering culture focused on quality, not chaos
    • Opportunity to grow
    More
  • · 91 views · 10 applications · 20d

    Looking for Wordpress Designer / Elementor

    Part-time · Full Remote · Worldwide · Product · 5 years of experience · English - C1
    To respect everyone’s time, we want to be transparent from the start: This is paid, per-task work (not a fixed monthly contract). There is no guarantee of constant or regular work. Work volume can vary:Some months: 5–10 websites Other months: 0–5...

    To respect everyone’s time, we want to be transparent from the start:
     

    • This is paid, per-task work (not a fixed monthly contract).
    • There is no guarantee of constant or regular work.
    • Work volume can vary:
      • Some months: 5–10 websites
      • Other months: 0–5 websites
    • Projects are simple WordPress pages & blogs with a unique touch. 
    • Articles are AI-generated placeholders and will later be replaced - your focus is layout, structure, and design with Elementor, not content writing.
       

    If this setup works for you and you enjoy clean, task-based WordPress work, we’re happy to hear from you.

    Per per Task 150$ for a standard WP page. Extended ones with more content and precise work, (250-300$).




     

    More
  • · 114 views · 6 applications · 20d

    Middle Software Engineer (Python)

    Hybrid Remote · Ukraine · 3 years of experience · English - B1 MilTech 🪖
    We are a startup developing alternative navigation systems for UAVs. We’re looking for a Software Engineer with strong Python skills to contribute to both our product and its management ecosystem. Requirements Bachelor’s degree in any STEM field Solid...

    We are a startup developing alternative navigation systems for UAVs. We’re looking for a Software Engineer with strong Python skills to contribute to both our product and its management ecosystem.

     

    Requirements

    • Bachelor’s degree in any STEM field
    • Solid Python with async programming
    • Strong understanding of OOP, APIs, and client–server architecture
    • Strong CI/CD experience (GitHub Actions)
    • Strong Docker knowledge
    • Confident Linux user
    • English for technical communication

    Nice to Have

    • Raspberry Pi / embedded Linux experience (including firmware flashing)
    • Experience with Unreal Engine / Airsim / Gazebo for flight simulation
    • Experience with ArduPilot or other autopilot software
    • AWS experience
    • Knowledge of information security fundamentals

    Responsibilities

    • Develop and maintain an internal product deployment and management ecosystem
    • Automate SITL and HITL tests (Raspberry Pi + flight controller + Unreal Engine simulator)
    • Build and maintain CI/CD pipelines
    • Develop Docker-based build and deployment workflows

    What we offer:

    • Hybrid flexibility: office/remote, flexible hours
    • Rapid growth path
    • Small team with big ownership — you’ll ship user-visible features and directly influence product direction
    • Startup culture that values speed, involvement, and initiative
    • Opportunity to impact Ukraine’s defense technology

    About Droneops:

    Team is a world leader in Computer Vision Algorithms and has substantial research track record in scientific communities. Based mainly in the UK and Ukraine.

    More
  • · 489 views · 38 applications · 21d

    Senior Software Engineer (Golang)

    Full Remote · Countries of Europe or Ukraine · Product · 5 years of experience · English - B1
    Ubidex is seeking a highly skilled Software Engineer to join our team and contribute to the development of a large-scale SaaS platform. In this role, you will be responsible for designing and implementing architectural solutions to ensure high performance...

    Ubidex is seeking a highly skilled Software Engineer to join our team and contribute to the development of a large-scale SaaS platform. In this role, you will be responsible for designing and implementing architectural solutions to ensure high performance and efficiency in our platform for retargeting advertising campaigns and analytics.

     

    Required Skills and Experience:

     

    • 7+ years of experience in backend development in total;
    • 5+ years of experience with Go development; capable of building and maintaining high-load backend systems;
    • Experience with Linux (Debian / Ubuntu);
    • Solid understanding of Docker and container orchestration systems (k8s, swarm);
    • Experience with PostgreSQL;
    • Experience with In-memory storage (Redis, Aerospike);
    • Experience with distributed systems and high-load services;
    • Experience with Microservices (API, patterns, background processing);
    • Experience in developing REST, GraphQL, gRPC API;
    • Solid understanding of KISS, DRY, SOLID principles and design patterns;
    • Practical experience with event-driven development patterns;
    • Experience with Ansible and CI/CD tools like Gitlab CI;
    • Experience with monitoring and logging tools and performance tunning;
    • Fast learner with a strong desire to continually acquire new knowledge;

     

    Nice to have:

    • Experience with ClickHouse;
    • Experience with designing GraphQL and gRPC API;
    • Experience with message brokers like RabbitMQ, Apache Kafka, NATs;
    • Experience with scripting languages like Python, Bash;
    • Experience with Node.js development;

     

    Responsibilities:

     

    • Build high-load (500k+ RPS) distributed system using Golang and Node.js;
    • Design and implement backend features from conception through to deployment;
    • Analyze system performance metrics and bottlenecks to fine-tune services for maximum efficiency;
    • Work closely with team to deliver high-quality features and resolve issues;
    • Review code and provide feedback to ensure best practices (e.g., style guidelines, accuracy, testability, and efficiency);
    • Define and implement testing strategies, including unit testing, integration testing, and performance testing, to ensure the reliability of the system;
    • Stay updated on the latest technologies and tools relevant to the project, and big data processing, making informed decisions on technology adoption
    • Be a part of the critical path in a fast-growing project's development and delivery processes.

     

    Product stack:

    • On-premise: Docker, Swarm, k8s
    • Programming languages: Golang, JavaScript / Node.js
    • DB: PostgreSQL, Redis, ClickHouse, Aerospike, Mongo
    • Monitoring: Prometheus, Loki, Grafana
    • CI/CD: GitLab, Ansible
    • Storage: S3(minio)
    • Web: nginx, traefik, cloudflare

     

     

    More
  • · 103 views · 7 applications · 22d

    Senior C# Engineer (Relocation to Madrid)

    Office Work · Spain · 5 years of experience · English - None
    We are looking for a Senior C# Engineer to join the FinTech team developing a remittance and payment services platform. The project focuses on building secure and compliant systems for international money transfers, partner integrations, and automation of...

    We are looking for a Senior C# Engineer to join the FinTech team developing a remittance and payment services platform. The project focuses on building secure and compliant systems for international money transfers, partner integrations, and automation of financial operations. We expect the new team member to be technically strong, proactive, and business-oriented, with proven experience in FinTech system development — ideally in areas such as core banking, remittance, or API-based financial integrations. You will work closely with business and operations teams to ensure efficient, accurate, and transparent financial workflows.

     

    Details

    Location: EU (The first 3 months you will remotely, after - relocate to Madrid, with onsite client support)
    Employment Type: Full-time onsite in the office
    Start Date: ASAP
    Language Requirements: English - Fluent, Spanish - as plus

     

    Project Description

    A licensed remittance and payment services provider focused on delivering fast, secure, and compliant international transfers.
    The company operates within the FinTech domain, serving global remittance corridors and integrating with multiple partners and financial institutions through API-based connectivity.

     

    Requirements:

    • 5+ years of commercial experience in backend development using C# / .NET
    • Proven experience in FinTech systems — core banking, remittance platforms, payment processing - MUST
    • Strong understanding of money movement, reconciliation, and transaction workflows
    • Hands-on experience with RESTful APIs, partner/banking integrations, and financial automation
    • Solid knowledge of SQL databases and experience with data consistency/reconciliation logic
    • Experience building and maintaining scalable backend services and API-based architectures
    • Understanding of security and compliance related to financial data exchange
    • Ability to define and document functional and technical requirements
    • Experience collaborating with business and operations teams to improve financial processes
    • Excellent communication skills and a proactive, problem-solving mindset
    • English B2+, Spanish - as plus

     

    Key Responsibilities:

    • Develop and maintain backend services in C#
    • Build integrations with partner and banking APIs
    • Automate internal operations and reconciliation processes
    • Contribute to functional and technical requirements definition
    • Collaborate closely with business and operations teams to optimize financial workflows
    More
  • · 80 views · 9 applications · 22d

    Ruby on Rails Engineer

    Full Remote · EU · 5 years of experience · English - None
    We are looking for an experienced Ruby on Rails Engineer to join a product-driven team working on scalable web applications with a strong focus on performance, clean architecture, and business impact. The role involves building and maintaining backend...

    We are looking for an experienced Ruby on Rails Engineer to join a product-driven team working on scalable web applications with a strong focus on performance, clean architecture, and business impact. The role involves building and maintaining backend services, integrating third-party systems, and collaborating closely with frontend and product teams.

     

    Details

    • Location: Fully Remote
    • Employment Type: Full-time
    • Start Date: ASAP
    • Language Requirements: English – Upper-Intermediate or higher
    • Time Zone Overlap: At least 2–3 hours with CET / US time zones

     

    Key Responsibilities

    • Develop, maintain, and scale backend services using Ruby on Rails
    • Design and implement RESTful APIs and backend business logic
    • Work with relational databases, ensuring performance and data integrity
    • Integrate third-party services (payments, marketplaces, external APIs)
    • Collaborate with frontend developers, product managers, and QA
    • Write clean, maintainable, and well-tested code
    • Participate in code reviews and architectural discussions

     

    Requirements

    • 4+ years of commercial experience with Ruby on Rails
    • Strong understanding of MVC architecture and Rails ecosystem
    • Experience with PostgreSQL / MySQL
    • Solid knowledge of REST APIs and background jobs (Sidekiq or similar)
    • Familiarity with Git and modern development workflows
    • Experience working in Agile/Scrum environments
    • Ability to work independently in a remote setup

     

    Nice to Have

    • Experience with Hotwire / Turbo / Stimulus
    • Background in marketplace or e-commerce platforms
    • Experience with cloud platforms (AWS / GCP)
    • Knowledge of Docker and CI/CD pipelines
    • Basic frontend skills (HTML, CSS, JavaScript)
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  • · 116 views · 4 applications · 22d

    Software Development Engineer

    Full Remote · Poland, Serbia · 3 years of experience · English - B2
    Akvelon is an American company with offices in 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,...

    🌎Akvelon is an American company with offices in 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 the client’s needs and processes.

     

    Tech Stack:

    • Python, PowerShell, Azure

       

    Requirements:

    • Strong experience with Python (asyncio, dataclasses, async HTTP, unit testing, pytest)
    • Proficient in PowerShell scripting and automation
    • Hands-on experience with Microsoft Azure services (Service Bus, Storage, Key Vault, VM/VMSS, AKS, ACI, DNS, Azure Pipelines)

     

    Nice to have:

    • Experience with C# / .NET development
    • Knowledge of ARM templates and infrastructure as code
    • Familiarity with Docker and containerization
    • Understanding of networking fundamentals (BGP, VLANs, routing, subnets)

     

    Benefits:

    • Paid vacation, sick leave (without sickness list);
    • Official state holidays – 9-11 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. It additionally depends on the project’s operational hours. Work on weekends or overtime is only upon request of the customer and is paid in addition;
    • 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.

     

    Interview Process:

    • HR Interview;
    • Technical Interview;
    • Manager Interview;
    • Client Interview.
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  • · 175 views · 82 applications · 22d

    Senior Python Developer

    Countries of Europe or Ukraine · Product · 5 years of experience · English - B2
    Numerical Technologies LTD is a leading provider of custom software solutions and services specializing in risk, limits, and regulatory capital. Right now, we are looking for a Python Developer to join our team. What will you be doing? As part of the...

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

     

    What will you be doing?

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

     

    What are we looking for:

    ◼ A strong programming background with Python and OOP skills.

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

    ◼ Deep understanding of algorithms and data structures.

    ◼ Experience with FastAPI and Linux environments.

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

    ◼ Familiarity with LangChain is a plus.

     

    What we offer:

    ◼ Competitive compensation depending on experience and skills.

    ◼ Regular assessments and salary reviews.

    ◼ Paid personal days.

    ◼ Health insurance.

    ◼ Mental health support program.

    ◼ English/Polish/Spanish language classes.

    ◼ Flexible working schedule.

    More
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