Jobs Backend

We are looking for a developer with strong experience in Rust and Python.
The project is already live: the core is written in Rust, while integrations and business logic are implemented in Python.

Responsibilities:

• Maintain and further develop an existing project (Rust + Python).
  
   
• Optimize performance and fix bugs.
  
   
• Participate in fast release cycles and bug-fixing processes.
  
   

Requirements:

• Strong Python skills (3.8+), preferably with experience in data/web libraries.
  
   
• Experience with Rust or willingness to quickly dive into it.
  
   
• Confident JavaScript knowledge.
  
   
• Experience working with data: AI / data analysis, CSV, Excel, Google Sheets.
  
   
• Understanding of multithreading, API integrations, and system-level tools.
  
   
• Ability to quickly navigate an existing codebase and solve tasks independently.
  
   

Nice to have:

• Experience with CI/CD, Docker, GitHub Actions.
  
   
• Knowledge of code security practices and secret rotation.
  
   
• Familiarity with data / fintech ecosystems (Pandas, Polars, etc.).

We are seeking a Senior Python Engineer, and if you’re passionate about working with cutting-edge technology in a dynamic environment and have experience in the travel domain, we’d love to have you join our team.

Our client is a prominent global travel management company specializing in comprehensive travel solutions for corporate clients. 
 

You Have

• 3–6+ years of experience with Python (Python 3) and async development (asyncio, aiohttp)
• Strong experience with Django for APIs and backend services
• Hands-on experience with MongoDB and document-based data modeling
• Experience using Redis for caching or coordination
• Familiarity with Kafka or similar messaging/streaming systems
• Experience with Pydantic or Marshmallow for validation and serialization
• Experience integrating logging and monitoring tools (e.g. Sentry)
• Solid understanding of microservices and distributed systems
• Ability to work independently, communicate clearly, and take ownership
• Comfortable using AI coding assistants (e.g. Copilot, Cursor)
   

Would be a plus

• Experience in travel systems (air, flight, booking platforms)
• Exposure to AI-powered solutions or integrations
• Basic DevOps / CI/CD experience
   

You Are Going To

• Build and maintain scalable, high-quality Python backend services
• Participate in architecture and technical design decisions
• Collaborate with cross-functional teams to deliver reliable solutions
• Write clean, well-tested, and maintainable code
• Mentor junior engineers and support technical growth
• Integrate backend services with Amadeus travel systems
• Build and maintain scalable, high-quality Python backend services
• Participate in architecture and technical design decisions
• Collaborate with cross-functional teams to deliver reliable solutions
• Write clean, well-tested, and maintainable code
• Mentor junior engineers and support technical growth
• Integrate backend services with Amadeus travel systems

We are looking for an AI-First Product Engineer (Full-Stack): SvelteKit Frontend, Golang Backend. 
We don't need coders, we need engineers who build features end-to-end using Claude Code. Without any "hand-coding".

Details:
• AI coding experience (mandatory!): experience with Claude Code - #1 priority, or other agentic coding tools. Claude Code is what is used on the project
• Senior Full-Stack Engineer (SvelteKit Frontend, Golang Backend), 5+ years of experience, can potentially consider really strong candidates with 4 years of experience
 • Strong proficiency in English (Upper-intermediate level or Advanced)
 • Full-time
 • Fully remote

Sharing more details about the responsibilities and requirements below.

What you'll actually do:
 • Own features end-to-end: from specs to deployment to fixing bugs
 • Use Claude Code to generate SvelteKit frontend and Golang backend code
 • Review AI output for quality and architectural fit
 • Fix bugs to learn our codebase, then rapidly build new features
 • Make quick decisions on what to build vs buy vs generate with AI
 • Talk to customers when they report issues and ship fixes same day

Our stack:
 • Frontend: SvelteKit, turbo monorepo, Vercel
 • Backend: Golang monorepo
 • AI: Claude Code (mandatory), other agentic coding tools

Products you will build:
 • API: platform features, tooling, multi-agent system, etc.
 • UIs: internal UIs, B2B dashboards, B2C web apps

You must have:
 • Ownership mentality with a strive for elegantly simple, high-quality solutions
 • Strive for max quality - you test your own work thoroughly since we have no QA team, everything you ship MUST work
 • Product mindset - you care about WHY we're building something
 • Proven experience using Claude Code or similar agentic AI (Cursor, Windsurf)
 • Strong SvelteKit and Golang experience - you'll review AI's code in these, and you must understand how it works
 • Broad architectural knowledge of building modern full-stack applications
 • Excellent spoken English and a good internet connection for daily video calls

You are a great fit if you:
 • Get frustrated when development takes weeks instead of days
 • You think in features and architecture and not single lines of code
 • Can spot subtle bugs in AI-generated code quickly
 • You ship fast but always verify it actually works
 • Have shipped real products that customers actually use
 • Think "how can AI build this?" as your first instinct

Red flags (don't apply if):
 • You've never used Claude Code or similar AI coding tools
 • You're a perfectionist who loves to code
 • You need detailed specs before starting
 • You see AI as a threat rather than leverage
 • You're outside European/African time zones

Delasport is an iGaming Software company providing Sports Betting & Online Casino software, and turnkey B2B solutions. Established in 2010, Delasport delivers a one-stop-shop solution of Sports Betting and Online Casino from a White-Label, with a full range of management services to a Plug&Play iFrame and a complete Turnkey. We are establishing an R&D centre in Kyiv, and are looking for top talents to join our team.

As a Senior PHP Engineer, you will dive into the complex but rewarding world of Sports and Online gaming, integrations, real-time calculation, scrapping data, and reporting, all at a massive scale.

TECHNOLOGY STACK: PHP 8, Symfony 6, Node.js, API REST, MongoDB, MySQL, Kafka, Docker, Kubernetes

RESPONSIBILITIES

• Participate in the design and decision-making of technical solution implementation
• Troubleshoot, analyze, provide workarounds and resolve various software problems
• Mentor and train new team members

REQUIREMENTS

• 5+ years experience in web application development
• Advanced architecture understanding both on theoretical and practical levels
• Deep knowledge of PHP programming
• Working experience with the Symfony framework
• Knowledge of the entire web stack and how each part impacts performance and reliability
• Exhaustive knowledge of database design and implementation
• Design and business insight
• Commitment to quality, performance, continuous improvement, and efficiency
• Analytical mindset and good problem-solving skills
• Experience in taking ownership
• Upper-intermediate level of English

NICE TO HAVE

• Gaming and sports industry experience
• NodeJS, Redis
• Experience in web application security and performance tune-up
• ELK, Kibana

WHAT WE CAN OFFER YOU

• Modern office in Podil with an uninterruptible power supply and the Internet
• Personal time off (21 business days of paid vacation, paid days on special occasions, sick leaves, emergency days off)
• Public holidays
• Health and life insurance with our broker, available starting from the month following the employee’s start date with the company
• Modern technical equipment
• English courses with native speakers
• Ukraine-based educational programs
• Sports activities reimbursement
• Corporate entertainments
• Happy hours on Fridays
• Gig contract support

Bits Orchestra is building a talent pool of Trainee / Junior .NET Developers for upcoming projects.

We are looking for motivated junior web developers with a solid foundation in .NET and UI development, who are eager to grow and gain hands-on experience with modern CMS-based solutions, including Kentico CMS.

Bits Orchestra is a software outsourcing company specializing in custom web solutions and CMS platforms. Our team consists of around 50 professionals and is currently in an active growth phase, with a strong focus on building mature engineering processes and scaling operations.

Interested? 🌟 Read on!

Requirements:

— Software development on a .NET and SQL Server 2022 platform. Development includes implementing system improvements/enhancements and resolving system defects.
— Сonfident knowledge of .NET 8.0, MVC, ASP.NET, Entity Framework, C#, T-SQL, HTML, and CSS
— Familiarity with Visual Studio 2022/Rider, Windows 10/11, Microsoft SQL Server 2022, and IIS 10
— Knowledge of JavaScript, REACT, Angular, and .NET Framework 4.8 will be beneficial
— At least Upper-Intermediate level of spoken and written English 💡

What you’ll be working on

As a trainee / junior developer, you will be responsible for the development, and testing of application solutions within an object-oriented environment.

— Under close supervision, develops, codes, tests, and debugs existing functionality and enhancements in .NET web applications.
— Stays current with cutting-edge technologies to improve and modernize existing applications’ functionality, performance, and UI.
— Possesses a good understanding of business applications.
— Works with the team to understand and resolve software problems, resolves customer complaints with software, and responds to suggestions for software modifications or enhancements.
— Follow the software development life cycle for each development task following the Agile Scrum methodology by brainstorming the technical approach, developing code, and unit testing according to the development schedule and team processes.

Why work with us?

You will have the opportunity to grow together with a company that is actively scaling and to work on long-term projects for international clients.

What can we offer you:

Competitive salary (discussed individually).
Option for a salary review after 12 months.
Comfortable working environment with uninterrupted power supply and Starlink.
Ability to work from home (remote-first approach).
Flexible working hours and vacation planning.
18 paid vacation days.
15 paid sick leave days (75% of fixed salary).50/50 compensation for English courses or additional professional courses.
IT Cluster membership.
Accounting support.
All necessary working equipment (laptop, monitor, headphones, etc.).

Recruitment Process:

1) Test Task ( deadline 3 working days )
2) CV Screening — we’ll review your resume to match key technical and project experience.
3) HR Interview (45m) — a short conversation to learn more about your goals, expectations, and availability.
4) Tech Interview (60min) — a technical discussion with our specialist where we’ll dive deeper into your experience, approach to problem-solving, and knowledge relevant to the role.

To apply for this position, please:

Submit your resume (CV) via the link below.
We will be happy to provide additional information and support you at every stage of the process.
We look forward to receiving your application!

🚀 This opportunity could be the next step in your professional growth — give us a chance to get to know you!

Join us, the solution of Virtual Edge which unifies multiple Edges into one platform that integrates all your existing CDN platforms. Looking for talented, ambition a Backend Developer who will join our international team.

Search in Kyiv ONLY.

RESPONSIBILITIES

• Design and develop high-load backend systems using Go
• Write clean, efficient, scalable, and reliable code
• Ensure high test coverage with unit, integration, functional, and end-to-end (E2E) tests
• Contribute to the design, development, and optimization of platform

• Collaborate closely with engineers, product managers, and other stakeholders to deliver high-quality solutions

   

SKILLS

• 2+ years of experience in backend development (Go / Java / C++)
• Fundamental understanding of multi-threaded architecture
• Strong understanding of object-oriented programming
• Excellent problem-solving and analytical skills
• Strong communication and collaboration skills

• Bachelor’s or Master’s degree in Computer Science or a related field

   

NICE TO HAVE

• Experience with Python
• Experience with JavaScript
• Familiarity with Kubernetes or cloud platforms (AWS, GCP, etc.)
• Knowledge of RabbitMQ and Cassandra

We are looking for a Senior .NET Developer to work on large-scale international projects with modern microservices architecture. You will build scalable and resilient backend services, develop RESTful APIs, implement asynchronous communication, and work with modern databases.

Responsibilities

• Develop backend services using .NET 8+ and ASP.NET Core
• Design and implement microservices ensuring scalability, resilience, and loose coupling
• Build and maintain RESTful APIs with versioning and documentation (Swagger/OpenAPI)
• Implement asynchronous communication using RabbitMQ
• Containerize applications with Docker and support deployments on Kubernetes
• Integrate authentication and authorization using Auth0 and JWT
• Work with MongoDB (unstructured/semi-structured data) and PostgreSQL (structured data, complex queries, transactions)
• Support CI/CD pipelines (Azure DevOps, GitHub Actions) and monitoring (Grafana)
• Optimize performance and implement security best practices in microservices environments

Requirements

• Strong experience in .NET 8+ and ASP.NET Core
• Experience with microservices, RabbitMQ, Docker/Kubernetes
• Experience with Auth0/JWT and MongoDB/PostgreSQL
• English: Upper-Intermediate or higher

About the Company

We are a leading IT solutions provider with experience in large-scale products across education, finance, retail, and telecommunications. Using Agile and Lean methodologies, we deliver innovative solutions focusing on quality, transparency, and customer-centricity.

About the client

• Company: US-based funded startup

• Product: A data-heavy analytics platform for CHROs (clients include Uber, Figma, DoorDash)

• Focus: The team is AI-forward and values engineers who utilize modern AI coding tools.

• Tech stack: TypeScript, NestJS, Snowflake, SQL, AWS.

⸻

Who we’re looking for

We’re looking for a Senior Backend Engineer to build features, debug complex client issues, and work directly with production logs.

This is a strictly backend role (no frontend work) centered around data pipelines and API development.

Ideal candidate:

• Must-have: Strong TypeScript and NestJS.

• Data proficiency: Strong SQL skills and experience with Snowflake (understanding data models/querying).

• Debugging skills: Comfortable working with production logs to solve real customer issues.

• AI-Enabled: Experience with Claude Code or similar AI coding tools is considered super valuable by the client.

• Nice to have: AWS, Terraform, Kubernetes experience.

• Upper-Intermediate+ English

• Location: LATAM only (high timezone overlap required).

We are building a high-scale B2B SaaS platform tailored for the US Real Estate market. Our system empowers clients to launch and manage personalized, high-performance websites for lead generation.
 

Our core Laravel API is currently undergoing a strategic architectural evolution. We are building a new  system to support a robust multi-tenant SaaS architecture designed to reliably serve hundreds of tenant websites from a single codebase. You will play a key role in steering architectural decisions, improving data isolation, and ensuring long-term maintainability as we transition from a standard setup to a scalable, production-grade platform.

Must Have:

• PHP 8.3+ & Laravel Expertise in modern PHP and Laravel internals, including Service Container, Service Providers
• API Design (SaaS-first) Experience designing clean, versioned REST APIs for client dashboards, admin panels, and external integrations with a clear separation of concerns.
• Postgres & JSONB: Advanced schema design using JSONB for flexible entity attributes and GIN indexing for performance.
• Multi-tenant Patterns: Practical experience in data isolation strategies (Shared Database with Global Scopes vs. Multi-DB).
• Jobs & Queues: Expertise in Laravel Horizon, queue prioritization, and robust handling of long-running processes.
• Database Management at Scale: Expertise in handling complex migrations, composite indexes, and large-scale data integrity.
• Automated Testing: Commitment to TDD/Integration testing (Pest or PHPUnit) to ensure stability across all tenant sites.
   
• Will be +
• Laravel Octane: Experience with high-performance Swoole or RoadRunner environments and stateless application design.
• Production SaaS Experience
•  

We Offer

• Competitive compensation 
   
• Opportunity to grow within a fast-developing business
   
• Professional and collaborative work environment

Our team is responsible for the development, integration, and support of corporate information systems designed to help business processes run with maximum efficiency.

We develop a set of software products used by 15k+ Luxoft employees. Our solutions automate a wide range of business processes, including client relationship management, contract workflows, purchasing, business travel, budget planning, invoicing, recruitment, personnel administration, and time and resource management.

We are looking for an experienced Software Developer with deep knowledge of architectural approaches to software design and implementation.

• Responsibilities:

  Be part of an agile development team
  Participate in microservices architecture implementation
  Participate in architecture and system design reviews
  Understand the concepts of Clean Architecture and DDD
  Be able to conduct code reviews
  Have experience with the .NET 9 tech stack
  Be able to write maintainable code

• Mandatory Skills Description:

  - .NET 9
  - DDD
  - Clean Architecture
  - Angular 19
  - MS SQL

• Nice-to-Have Skills Description:

  - Advanced English
  - Azure Kubernetes Services
  - Azure DevOps (CI-CD, Docker, HELM)
  - Enterprise Architecture
  - EF Core
  - Microservices architecture
  - Elastic
  - Redis

Product: SaaS platform for package management, route optimization, and delivery operations

Responsibilities

• Develop backend services using Python (FastAPI), Celery/ARQ, SQLAlchemy, AsyncIO, Async PostgreSQL (asyncpg).
• Design and maintain PostgreSQL schemas and data access layers.
• Build and maintain APIs consumed by web and service clients.
• Implement and manage infrastructure on AWS (RDS, Lambda, etc.).
• Use Terraform to define and maintain infrastructure as code.
• Deploy and operate services using AWS-native container solutions (e.g., ECS, ECR, Fargate).
• Monitor, troubleshoot, and improve system reliability and performance.
• Implementing CI/CD pipelines, experience with GIT, understanding GitFlow

• Work closely with the product and engineering team to support continuous delivery.

   

Requirements

• 3+ years of experience in backend or full-stack development.
• Strong experience with Python and FastAPI.
• Solid experience in PostgreSQL, SQLAlchemy.
• Understanding of PostgreSQL Materialized View specifics
• Hands-on experience with Amazon RDS or Aurora, and Serverless, EKS in production environments.
• Practical knowledge of Terraform.
• Experience deploying and operating containerized services on AWS EKS.

• Understanding of CI/CD pipelines and basic observability (logs, metrics).

   

Nice to Have

• Experience scaling SaaS platforms.
• Familiarity with route optimization, logistics, or data-intensive systems.
• Knowledge of frontend technologies (JavaScript / TypeScript) and CI/CD nuances

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 Java Developer to join our team.

What you will be doing:

As part of the team, you will be participating in a project for a major US financial holding company.  You will develop, maintain, and support software features, write scalable and fault-tolerant Java code, debug applications, and integrate with internal and third-party services. You will collaborate with the product team to meet requirements and ensure code quality through testing, code reviews, and system design.

Project: Modernization of a monolithic system into a microservices architecture. Java services provide authentication, logging, and data management. Python services handle core computational logic.

What we’re looking for:

• 5+ years of experience in Java development, preferably in FinTech.
• Strong experience with Java and Spring Framework.
• Solid understanding of microservices architecture and design patterns.
• Proficient in SQL (Oracle, PostgreSQL).
• Experience with AWS.
• Python knowledge is a plus.
• Ability to test your own code to ensure quality.
• Capable of working autonomously and independently. 
• University diploma (Bachelor’s degree or above) required.
• Excellent communication and collaboration skills in an international environment.
• Upper-intermediate English level or higher.

What we offer:

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

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.

Project Description:
We are developing a cybersecurity assessment platform that analyzes how well data and systems are protected and whether they comply with international security standards.
The platform is built using modern technologies — Python, FastAPI, SQLAlchemy, TypeScript, React, AWS, and Docker — and follows a microservices architecture with a strong focus on asynchronous processing and scalable cloud deployment.
We are now looking for a Python Developer to join our friendly team and contribute to building reliable, high-performance services.
 

Required skills:

- 1+ years of hands-on experience with Python (FastAPI) and JavaScript/TypeScript (React);

- Experience with cloud technologies, especially AWS (CloudWatch, Lambda, EC2, ECS, etc.);

- Strong understanding of API design, management, and integration concepts;

- Solid experience with ORM frameworks, particularly SQLAlchemy;

- Experience writing and maintaining unit and integration tests using Pytest;

- Good knowledge of PostgreSQL and relational database concepts;

- Familiarity with containerization using Docker and version control systems like Git;

- Experience participating in code reviews and following clean code principles;

- At least Intermediate level of English for communication and documentation.
 

We offer:
- Opportunities for career growth and personal development, to help you improve your skills and achieve your goals;
- No micromanagement - your ideas and initiatives are always encouraged.
- Educational programs that are covered by the company at 30% of the expense;
- Paid vacation leave and public holidays (21 vacation days annually);
- Competitive financial compensation with regular performance reviews;
- Outdoor team activities are paid for by the company;
- English language improvement through extensive communication;
- The chance to work alongside highly experienced and enthusiastic IT professionals who are ready to share their knowledge and help you gain invaluable experience in a live IT environment.
 

Our hiring is quick and straightforward:
- Test task 
- Technical interview with a hiring manager (1.5 hours)

Build scalable serverless systems that route users intelligently

Softsich is a young and ambitious international product tech company that develops scalable B2B digital platforms. We’re looking for a Senior Python Developer who will take ownership of a high-load AWS serverless solution designed to intelligently redirect users to the most suitable mirror domain.

The system takes into account multiple factors such as geographical location, mirror availability, user behavior, ISP limitations, and more. Its goal is to improve user experience, ensure high availability, and provide strong monitoring and analytics — all built on top of AWS serverless technologies for maximum scalability and flexibility.

Your key responsibilities will include:

– Full ownership and ongoing development of a serverless backend solution.

– Designing, implementing, and maintaining services using Python and AWS Serverless stack.

– Working with AWS CDK to define and evolve infrastructure as code.

– Developing and maintaining APIs and integrations with external systems.

– Ensuring system reliability, scalability, and fault tolerance.

– Improving monitoring, logging, and observability of the platform.

– Actively participating in technical and architectural decision-making.

It’s a match if you have:

– 3+ years of commercial experience with Python.

– Hands-on experience with AWS cloud services (Lambda, Serverless)
– Practical experience working with AWS CDK or other Infrastructure as Code tools.

– Solid understanding of serverless architectures and event-driven systems.
– Experience with affiliate traffic–driven systems or traffic routing solutions.

– Familiarity with Datadog or similar monitoring tools.

– Exposure to AI / ML–driven logic or data-based decision systems.

– Experience building and supporting production systems with real traffic.

– Ownership mindset and readiness to independently drive the project forward.

– DevOps mindset and experience working close to infrastructure.

What we offer:

– Flexible schedule and remote format or offices in Warsaw/Kyiv — you choose.

– 24 paid vacation days, sick leaves, and health insurance (UA-based, other locations in progress).

– A supportive, friendly team where knowledge-sharing is part of the culture.

– Coverage for professional events and learning.

– Birthday greetings, team buildings, and warm human connection beyond work.

– Zero joules of energy to the aggressor state, its affiliated businesses, or partners.

Own the system, not just the code

Send over your CV now — we’d love to get to know you better!