Jobs Backend

Please note that the vacancy is only for candidates ready for offline format of work in Uzhhorod.

Build the most meaningful apps on the latest web technologies!

ABOUT ELEMENTICA

Welcome to Elementica! We are excited to see you on our profile. Elementica is a leading global software development company – expert in delivering web development, mobile application development and IT consulting services of any complexity to clients worldwide.

www.elementica.io

JOB POSITION

We are looking for a talented Python Developer to join our Development Team on a full time long term basis. You will be at the core of our talented Web Apps teams and focus on building the most advanced and meaningful apps and workflows on the latest web technologies.

RESPONSIBILITIES AND DUTIES

As a Python backend engineer, you will play a key role in further ecosystem technical implementation and enhancement. We expect and encourage you to take initiative and be result-oriented and proactive in communication, architecture design, technical implementation, testing and reporting.

We are Product oriented developers with a growth mindset. We are curious problem solvers and we like to collaborate, communicate, share knowledge and technical ideas and grow together.

What you’ll do:

• Comunicate with the product owner and internal management team to perfectly understand domain area, specific tasks and their end goals proir to technical implementation
• Design and document architecture of the module / feature prior to its actual coding
• Write clean, well documented Python code, covered with the end-to-end and unit tests, following clearly defined internal style guides and best practices
• Do thorrough testing of the written code and implemented functionality in order to make sure it works according to the requirements and doesn`t produce new bugs
• Participate in regular stand ups with the end client.

What we look for in you:

• Results-orientation, collaborative, pragmatic and agile mindset
• Strong knowledge in working with FastAPI
• Independence and responsibility
• Working proficiency in English (written and verbal)
• Continuous learning

We are looking for these skills/experience:

• Strong knowledge of FastAPI Python framework
• Understanding of new Python features, 3.12+ versions are used on our projects
• Strong knowledge of Alembic & SQLAlchemy ORM v2.+
• Experience working with OpenAI and similar APIs (Prompt engineering, integrations)
• Experience or at leats clear understanding in writting both end-to-end and unit tests using PyTest
• Understanding of common development principles and best practices (SOLID, DRY, YAGNI), design patterns and Modular Monolithic Architecture
• Experience working with Docker and Docker Compose
• Experience in CI/CD processes is a plus
• Experience with web performance optimizations

What we offer:

* The opportunity to drive the development of cutting-edge software products

* The chance to work on interesting technical challenges such as advanced algorithms, wide integrations or scalable content management

* A positive, highly skilled, young team with a focus on quality

* Hybrid working possibility / Home-office friendly / Flexible working hours

* Pick your own gear: Linux or IOS - whatever works best for you

* A lot of room for your own ideas. We always highly encourage you to work on them together with the team.

* Outstanding compensation based on experience and 20 days vacation

* Sponsored training opportunities with Udemy

Our job offer Python Developer sounds interesting? Then we are looking forward to receiving your application!

About us:
 

ARRISE sets the benchmark for service delivery and excellence in the iGaming industry. Playing a key role in the success of its clients, which include Pragmatic Play, a brand relied upon by the world’s biggest online casinos for its cutting-edge products, ARRISE helps to deliver exceptional gaming experiences to millions of players worldwide.
 

Our global team of talented and driven professionals are shaping the future of iGaming. Headquartered in Gibraltar, we have offices spanning Canada, India, the Isle of Man, Latvia, Malta, Romania, Serbia, Bulgaria, and the UAE, and more exciting destinations on the horizon.
 

At ARRISE, we take pride in creating growth opportunities at all levels, constantly investing in our people while welcoming new colleagues and forging strategic partnerships that open new opportunities for success.
 

To achieve this, we bet on ourselves. We know that success is a collective effort, and our team is driven by ambition, collaboration, and a shared commitment to grow and succeed—while embracing every step of the journey.
 

Be part of the future of iGaming with ARRISERS! See a job that excites you? Apply now, and our friendly recruitment team will connect with you soon. Your journey starts here!

Required Skills: 

• 5+ years of hands-on experience in commercial software development using Java.  
• Solid understanding of Object-Oriented Programming (OOP) concepts and proficient in applying design patterns. 
• Extensive expertise in Java Core and the Spring framework (including Spring Boot, Spring Web, Spring Data, Spring Cloud). 
• Proficiency in vanilla JDBC for database interactions. 
• Strong understanding of RDBMS concepts and SQL, with experience working with databases such as Oracle, PostgreSQL. 
• Experience with Redis. 
• Experience with distributed messaging systems, particularly RabbitMQ. 
• Proven track record in the development of microservices and distributed transactional systems. 
• Knowledge of fundamental design principles for building scalable and highly available applications. 
• Good foundation in algorithms, design patterns, and data structures. 
• Proficiency in unit/functional testing frameworks such as JUnit 4/5, Spock, and Testcontainers.  

Preferred Skills:  

• Experience in application and infrastructure monitoring. 
• Proven ability to troubleshoot production problems related to software applications. 
• Exposure to high-load systems. 
• Good spoken and written English skills. 
• Experience with JSP, Thymeleaf, JavaScript, TypeScript, React would be a big plus. 
• Experience with MongoDB would be a big plus. 

Responsibilities:  

As a Java Software Engineer, you will play a pivotal role in engineering and implementing a high-loaded enterprise system that serves tens of thousands of users logging into our product every day. Your responsibilities will include: 

• Collaborating with cross-functional teams to design, develop, and maintain robust software solutions that meet the needs of our enterprise-level system. 
• Architecting scalable and efficient Java-based components to ensure optimal performance under high load. 
• Implementing best practices in software engineering, including code reviews, testing methodologies, and documentation standards. 
• Optimizing system performance and reliability through continuous monitoring, troubleshooting, and performance tuning. 
• Participating in the entire software development lifecycle, from requirements gathering and design to deployment and support. 
• Staying up-to-date with the latest technologies and industry trends to continuously improve our system architecture and development processes. 

Company offers: 

• Long-term employment. 
• Flexible timetable. 
• Comfortable working conditions. 
• Paid vacation and sick leaves. 
• English lessons, gym. 
• Competitive salary level. 

About the Project

Our client is building a platform that automates operational data exchange between financial institutions.

Banks, asset managers, and data providers use it to securely reconcile critical information such as user access rights and joiner/leaver events. The platform replaces manual, fragmented processes with automated and secure workflows, reducing operational risk, supporting regulatory compliance, and improving overall efficiency.

In essence, the project modernizes complex back-office operations in the financial sector, making them faster, more accurate, and more reliable.

Your Role

As a Python Developer, you will work on backend services that power these workflows. You will design and maintain APIs, implement business logic, and contribute to building a scalable, reliable system used by financial institutions.

This role is a good fit for engineers who enjoy working on clean backend architecture, well-defined domains, and systems where correctness and stability matter.

Responsibilities

• Develop and maintain backend services using Python
• Build and evolve APIs with Django and FastAPI
• Implement asynchronous and background processing using AsyncIO and Celery
• Work with SQL and NoSQL databases to ensure data integrity and performance
• Collaborate with QA and DevOps to ensure reliable deployments
• Write unit and integration tests as part of regular development
• Participate in code reviews and technical discussions

Requirements

• 3+ years of professional experience with Python
• Strong hands-on experience with Django and FastAPI
• Experience working with AsyncIO and Celery
• Solid understanding of SQL and NoSQL databases
• Familiarity with Docker and containerized environments
• Understanding of HTTP protocol and REST API design principles
• Confidence working in Linux / UNIX environments (shell, scripting, tools)
• You see testing (unit & integration) as part of the creative process, not a chore
• English — Intermediate+ (spoken and written)

Nice to Have

• Experience with fintech or regulated domains
• Background in high-load or data-intensive systems
• Experience with cloud platforms (AWS, Azure, or GCP)

• Experience integrating with Salesforce or similar CRM / third-party enterprise systems

   

Why Starnavi

At Starnavi, you will work on real-world production systems for international clients, collaborate with experienced engineers, and have the opportunity to influence technical decisions. We value responsibility, transparency, and engineering quality.

Delasport — Implementing Technological Solutions Here and Now.
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 looking for the top talents to join our team in R&D centre in Kyiv.
 

TECHNOLOGY STACK

Microservice architecture, Java 21, Java 25, Spring Boot 3.5+, JPA, JDBC, PostgreSQL, Kafka, Google Cloud Platform, Kubernetes, Docker, Testcontainers, Gradle
 

RESPONSIBILITIES

• Development of new business initiatives, an extension of existing ones
• Taking an active part in improvements and optimizations to the systems
• Resolve technical problems, critical thinking on the development approach
• Be part of a cross-functional team with end-to-end responsibility for the result
   

REQUIREMENTS

• 3+ years of commercial development experience using Java-related technologies
• 1+ years of working experience with API development
• Hands-on experience with microservice architecture
• Ambition to write high-quality code covered with integration tests
• Solid debugging and troubleshooting skills
• Proactive and result-oriented mindset
• Strong problem-solving skills
• Good level of English
   

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

We’re Expanding and Looking for Talented Developers!

Our team specializes in working with startups, starting from the earliest stages of their development. Each project we take on is a unique challenge, requiring innovative and effective solutions. That’s why we always stay at the cutting edge of technology.

We believe that productive work is only possible in a comfortable environment with excellent planning. The best solutions are built on well-thought-out architecture, quality code, and modern technologies.

If these priorities resonate with you, you’ll love being part of our team!

Requirements

• 1+ years of experience with PHP (Laravel) 
• Knowledge of database management (MySQL, PostgreSQL)
• 1+ years of experience with API development and integration
  Knowledge of Git, OOP principles, design patterns, and coding standards (PSR)
• Basic front-end development skills
• English proficiency sufficient for reading documentation and writing comments
• Ability to work in a team
• Self-motivation to find effective solutions for tasks

• Ability to effectively leverage AI tools for code generation, refactoring, testing, and documentation, while maintaining code quality and best practices.

   

Nice-to-Haves

• Experience with Node.js 
• Understanding of DevOps practices
• Familiarity with other frameworks

Responsibilities

• Develop and maintain backend services
• Ensure database integrity and performance
• Deliver high-quality back-end code
• Collaborate with front-end developers, Business Analyst, and Project Manager

What We Offer

• Possibility to be a part of startups from around the world
• Supportive, understanding, and flexible management
• Paid vacations and sick leave
• A friendly and welcoming team

About the Team

• The team size is 23 members
• Well-organized development process involving project managers and QA
• Every developer specializes in their area (back-end, front-end)
• Dedicated teams for each project
• The team's internal communication languages are Ukrainian or russian
• Company-sponsored English lessons to support professional growth.

• Please include examples of your code with your application — this will save time for both you and us.
• If you have test results or any test documentation, feel free to share them as well. This will help us evaluate your skills much faster.
• A test task may be assigned before or after the interview.

Our client is building an in-house algorithmic trading infrastructure focused on arbitrage and market-making across intent-based platforms and DEX ecosystems.
The system will support strategies around 1inch Fusion, arbitrage between Fusion & limit orders, research into the 1inch Aqua protocol, and market making on upcoming intent platforms integrated with Boosty.
Additionally, the project includes collaboration with Thalex exchange and leveraging existing professional expertise to design robust trading models, execution pipelines, and infrastructure for reliability and low-latency operations. Join our team and make an impact!

Requirements:
 

• Strong Python skills (NumPy, pandas, Jupyter, data analysis stack).
• Understanding of market microstructure (orderbooks, slippage, taker/maker fees).
• Options knowledge: IV, delta / vega / gamma, skew behavior.
• Strong analytical and quantitative mindset.

• Experience in crypto markets is a plus.

   

Responsibilities:

• Identify trading opportunities (arbitrage, mispricings, cross-venue inefficiencies).
• Backtest trading strategies and perform statistical validation.
• Monitor ongoing strategy profitability and performance metrics.

• Conduct risk evaluation (volatility, exposure, liquidity risks).

   

What we offer:

• Remote working format
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations
• Recruitment process:

Recruitment interview – Technical Interview – Client Interviews
 

Project description

We are executing a phased modernization program to migrate a legacy enterprise system built on Rocket UniVerse (UniVerse / UniData) database technology and a PowerBuilder client-server application stack to a modern Java-based platform with a relational SQL backend for a large US insurance company.

As part of this initiative, we are looking for a Senior Data Migration Engineer to play a key role in the data and data-driven logic migration. The primary responsibility of this role is to design and implement Java-based tooling for data extraction, transformation, validation, and reconciliation, ensuring that the migrated data in the target Database environment is accurate, consistent, and functionally equivalent to the legacy system.

This is a migration-focused role. Success in this position requires strong experience with Universe DB / MultiValue data models, combined with the ability to build robust, repeatable migration and validation components in Java within a phased or parallel-run modernization program.

Responsibilities

This role focuses on Java-driven migration tooling and data validation, combined with deep expertise in Rocket UniVerse.Developer will design and implement Java-based solutions to extract, transform, validate, and reconcile data and data-driven business logic from Universe DB, while also accounting for how this data is consumed and interpreted by the legacy PowerBuilder application.

Skills

Must have

Java:

· Strong experience with Java for backend development, batch processing, or migration tooling

· Experience with Java frameworks (Spring / Spring Boot preferred)

· Familiarity with data processing, concurrency, error handling, and logging

· Ability to design and build reliable, reusable migration and data validation components

Universe DB:

· Hands-on experience with Rocket UniVerse (UniVerse and/or UniData)

· Strong understanding of:

MultiValue data models and record structures

DICT files and metadata definitions

Data extraction, access patterns, and performance considerations

· Experience supporting Universe-based systems or participating in migration initiatives

Databases & SQL:

· Strong SQL skills with experience in relational databases

· Practical experience with PostgreSQL or similar platforms

· Experience mapping MultiValue data structures to relational schemas

· Understanding of data integrity, transactions, indexing, and query performance

Nice to have

Experience in Universe DB to SQL migration projects

Familiarity with ETL concepts and data validation frameworks

Basic understanding of Java backend data access patterns

Experience working in phased or parallel-run migrations

Exposure to enterprise or regulated environments

Languages

English: B2 Upper Intermediate

We’re looking for a Back-End focused engineer to join a product team building scalable, event-driven services on AWS. You’ll work primarily on backend systems and microservices, with occasional frontend tasks as a nice bonus.

What you’ll do

• Design, build, and maintain backend services using Node.js and TypeScript
• Develop event-driven workflows with AWS Lambda, SNS, SQS, EventBridge
• Build and evolve microservices with a focus on scalability, reliability, and clean APIs
• Own infrastructure changes using Terraform / Infrastructure as Code
• Work with PostgreSQL (schemas, queries, performance considerations)
• Contribute to deployments and delivery pipelines (CI/CD), and collaborate on Kubernetes-based environments

• Partner with the team to troubleshoot production issues and improve observability and stability

   

Tech stack

• Backend: Node.js, TypeScript, AWS (Lambda, SNS, SQS, EventBridge), microservices
• Infrastructure: Terraform (IaC), Kubernetes, CI/CD
• Database: PostgreSQL
• Frontend (plus): React, Material UI, Redux, TypeScript

What we’re looking for

• Strong commercial experience building backend systems with Node.js + TypeScript
• Hands-on experience with AWS serverless and event-driven architecture
• Solid understanding of microservices (integration patterns, resilience, performance)
• Practical experience with Terraform (or another IaC approach) and modern delivery practices
• Confidence working with PostgreSQL
• Ownership mindset: you can take a feature from design to production and support it after release

Nice to have

• Frontend experience with React / Redux / Material UI
• Experience running workloads on Kubernetes
• Familiarity with improving CI/CD pipelines and developer experience

Working hours

• 09:00–18:00 UK time (11:00–20:00 Kyiv time)

🚀AIMPROSOFT - Middle+ / Senior Back-End Developer (Java) Opportunity! 

Aimprosoft is looking for a Middle+ / Senior Back-End Developer (Java + AWS) to join a long-term (6–12 months, with a strong likelihood of extension depending on project progress and business needs) international project in the Payments Infrastructure & Integrations domain. 

The project focuses on building and maintaining backend services that integrate external providers (banks, acquirers, and alternative payment methods) into a unified payment platform used by global merchants. The system operates at scale and requires high reliability, security, and clear integration contracts. 

🎯About the project & role: 

You will work on Java-based backend services responsible for provider integrations and internal service communication. 
The role focuses on microservices development, API integrations, and stable backend evolution within an established engineering environment. 

Your contribution will help ensure consistent provider connectivity, system stability, and smooth rollout of new integrations. 

 
🔥What We Need From You: 

• 3+ years of experience in Java SE  (17/21) development 
• Strong experience with microservices architecture 
• Solid knowledge of: Spring framework, Maven 
• Experience with relational databases (MySQL, PostgreSQL) 
• Experience with NoSQL technologies (Redis, MongoDB) 
• Familiarity with AWS (EC2/SQS/SNS/ECS/EKS/S3) 
• Hands-on experience with (CI/CD pipelines, Docker) 
• Ability to translate user requirements into technical solutions 
• Experience using AI tools (ChatGPT, Claude, Cursor) for: Research, Drafting documentation 
• Fast learner and strong team player 
• English: Upper-Intermediate (B2) or higher for communication with international teams. 

📌Nice to have: 

• DynamoDB experience 
• Kubernetes experience 
• Experience with GCP 
• To be available from 5pm to 9pm Kyiv time (4–5 hours overlap with Central Time (CT))  
• Experience in Payments Infrastructure domain project 

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

   

💼What We Offer: 

• Official military deferment (reservation) 
• A competitive salary that appreciates your skills and experience 
• Cozy atmosphere and modern approaches. We have neither bureaucracy nor strict management nor “working under pressure” conditions 
• Opportunity to implement your ideas, tools, and approaches. We are open to changes and suggestions aimed at improvement 
• Work on a strategic, large-scale international project with high visibility. 
• Remote-friendly culture with strong team collaboration. 

Project Overview
The project is online platform that helps people book desks, meeting rooms, schedule meetings, coordinate teams and manage visitors. 
 

Responsibilities:
- Build highly performant, scalable PHP based SaaS applications.
- Craft beautiful frontend applications using Angular 20 and Typescript.
- Develop solutions to deliver new innovative products for web and mobile platforms using the project RESTful APIs running in AWS.
- Work closely with the wider engineering team (full-stack, backend), designers, and product.
- Be included in decisions and challenge our technical direction.
- Design and develop code with performance, usability, maintainability, and security in mind.
- Resolve technical issues through debugging, research, and investigation.
- Write and maintain automated tests to ensure we deliver quality work for our customers.
- Create and maintain internal technical documentation for deliverables.
 

Requirements (Must-have):
- 5+ years relevant experience in a software engineering role.
- Experience building large-scale consumer web/mobile applications and distributed systems.
- Knowledge of PHP + Symfony framework. 
- Knowledge of TypeScript (Angular preferred) to create interactive user interfaces.
- Up to date with the latest frontend libraries, frameworks, and practices.
- Passionate about writing clean code.
- You must be a quick learner and be flexible about what technologies you use. 
- Good understanding of MVC and SOLID principles.
- Experience with multi-tenancy would be a plus.
- Experience in implementing web services with a REST and Web API architecture
- You must be comfortable with rapid development in a Scrum / Agile environment and iterating based on market and customer feedback.
- Knowledge of Unit testing
- English level: upper-intermediate and higher
- Excellent collaborator and communicator within your team and the wider company.
- BSc in a related field such as Computer Science, Computer Engineering, or other software/design discipline.

Hiring Process:
- Intro call
- Technical discussion (focused on real experience)
- Offer

CLUST is a venture builder where successful businesses grow.
Young entrepreneurs launch and scale projects within our ecosystem, and specialised professionals realise their professional potential. We aim to work with talented entrepreneurs to learn and turn great ideas into profitable businesses.

Now we’re working with a startup in the Health & Fitness niche — and assembling a powerhouse team to drive real impact. The product’s growing fast — with proven unit economics, positive ROI on key audiences, and a marketing engine built to scale.

We’re looking for a Senior Backend Engineer — someone who will take ownership of serverless backend architecture and help us build a reliable, scalable foundation for our fast-growing product.

Why this role is worth your attention:
— Work with a modern codebase built with up-to-date technologies — no legacy constraints.
— Take part in high-level system design and architectural decisions.
— Contribute to a product that uses AI to meaningfully personalize user experience, turning data into real, tangible value for users.
— Operate in a flat structure with fast decision-making and minimal bureaucracy.
— Build a product that delivers real value and has a measurable impact on users’ lives.
— A professional growth path within backend and infrastructure engineering, with increasing ownership over system design, reliability, and platform-level decisions as the product scales.

What you will do:
— Build and maintain serverless backend services on AWS (Lambda, SQS, RDS).
— Own serverless.yml configuration: deployments, stages, environments, IAM policies.
— Design and evolve asynchronous message-driven workflows
(retries, DLQs, monitoring, failure recovery).
— Optimize PostgreSQL (Amazon RDS) performance and reliability
(indexes, migrations, scaling strategies).
— Implement monitoring and alerting, improve production stability and observability.
— Collaborate closely with frontend and product teams.
— Contribute to architecture and technical decision-making.

What we’re looking for:
— 5+ years of professional software development experience.
— Strong backend expertise with Python (3+ years).
— Hands-on experience with AWS Lambda (function design, packaging, deployment, monitoring, cold starts).
— Skills with Serverless Framework and serverless.yml (stages, variables, IAM roles, plugins, CI/CD).
— Production experience with Amazon RDS (PostgreSQL).
— Confident use of Amazon SQS: standard vs FIFO queues, retries, DLQs, idempotency, visibility timeouts and backpressure patterns.
— Strong understanding of REST API design.
— Observability experience: CloudWatch logs & metrics, alarms, structured logging, basic tracing.
— Deep understanding of security fundamentals: IAM least-privilege approach, secrets management (SSM / Secrets Manager), encryption basics, VPC fundamentals.
— Product mindset and autonomy in decision-making.
— English level: B1 and higher.

Will be a plus:
— Experience integrating payment providers.
— Experience with Google Spreadsheets integrations.

What we offer:
— Fully remote setup with flexible working hours.
— Benefits package (paid vacation, sick leave, and more).
— Support for personal and professional growth.
— Access to a curated corporate knowledge library.

We believe work should have meaning.
At CLUST, you’ll build systems that matter — with people who respect your experience and engineering ideas.

Sounds like a good match?
Send us your CV — we’d be glad to talk.


 

At the moment the company is looking for a Golang Developer who will be a part of their team:

Tasks:

-Write robust, scalable and easy-to-maintain code

-Develop high-quality integration code with third-party APIs and services, following the latest design and development patterns

-Collaborate with cross-functional teams to identify and resolve integration issues

-Research, design, scope, and estimate project requirements, ensuring the team meets agreed deadlines

-Ensure the team is to coding standards and best practices

-Develop and maintain technical documentation to ensure it reflects the current state of integration architecture and design

-Stay up-to-date with the latest integration technologies, trends, and tools, and apply them to improve our integration services

-Participate in code review sessions, providing feedback to team members

-Contribute to the development and implementation of processes and procedures to ensure the team's productivity and efficiency

Must-have:

-At least 3+ years of experience with Golang

-Knowledge of database (preferably PostgreSQL)

Nice-to-have:

-Previous experience with Linux, Docker, Kubernetes

-Knowledge of gRPC

-Ability to design, implement, and build microservices

Benefits:

-Full-time, remote job

-4 days working week (Monday - Thursday, Friday day off)

-Paid vacation (20 days) and sick leaves

-Flexible working schedule

-Friendly professional staff and warm atmosphere

Interview process:

-Call with HR

-Deeper technical interview with CTO and Systems Architect

We are seeking a Team Lead React/ Node.js to lead a small, high-impact engineering team

responsible for our customer-facing web platform and API, and an internal platform used for AI

model training. This role is both hands-on and leadership-oriented, with a strong focus on technical

ownership, system design, and product-team collaboration.

The ideal candidate combines deep technical expertise in modern TypeScript-based development

with experience guiding engineers, improving workflows, and shipping high-quality features in a

fast-paced startup environment.

Key ResponsibilitiesTeam Leadership

Lead a team of two full stack developers and one QA engineer.

Provide ongoing mentorship, code reviews, and technical direction.

Facilitate Scrum ceremonies and maintain smooth execution of sprints.

Ensure high engineering standards, testing quality, and delivery velocity.

Technical Ownership

Own the development and maintenance of our customer-facing web platform (React +Node.js), external APIs and Internal Platform.

Lead architecture, design, and implementation of backend services using AWS Lambda

(serverless) and containerized workloads on EC2.

Oversee performance, reliability, and scalability of the Postgres RDS database.

Drive improvements to CI/CD pipelines, build systems, testing strategy, and infrastructure

reliability.

Ecosystem & Tooling

Work within a monorepo environment.

Manage Infrastructure as Code using CloudFormation.

Maintain monitoring, logging, and alerting pipelines using Coralogix.

Ensure robust automated testing using Cypress and Vitest.

Maintain Docker-based development environments and EC2 deployments.Cross-Team Collaboration

Partner directly with Product Managers to translate requirements into technical plans.

Coordinate with other engineering teams under the CTO to align architecture, standards, and

shared components.

Key Projects They Will Own

Customer-facing web platform (React + Node.js + AWS) and API.

Internal platform for AI model training, including backend services and supporting tooling.

Ongoing modernization and scaling efforts across the stack.

Culture & Working Style

Scrum-based, iterative development

High autonomy—engineers are trusted to own problems end-to-end

Fast-paced startup with rapid decision-making and high impact

Qualifications

Strong experience with TypeScript across frontend and backend.

Hands-on experience with React, Node.js, AWS Lambda, EC2, Postgres RDS, and Docker.

Experience leading or mentoring engineers.

Solid understanding of CI/CD (GitHub Actions), automated testing, logging, and monitoring.

Ability to work directly with Product and translate requirements into architecture and tasks.

Nice to Have

Knowledge of serverless design patterns.

Experience in performance tuning for Postgres and Node.js.

Hiring Process

Technical screening

Culture and leadership interview with CEO

Join our Core Team as a highly skilled Python Developer to build and scale our high-load Geospatial AI Data Platform. You will be the critical link, productionizing Data Science models and transforming massive volumes of raw imagery into meaningful, structured insights that power our client-facing product. If you're driven by complex, high-scale big data challenges, this is the role for you. 

Key Responsibilities: 
● Data Pipeline Development: Implement and optimize robust ETL data pipelines for collecting, cleaning, transforming, and loading large volumes of geospatial data. 
● API Development & Deployment: Design, build, and maintain high-speed, scalable RESTful APIs (using frameworks like FastAPI/Powertools for Lambda). 
● Model Integration & Productionization: Work closely with Data Scientists to containerize and deploy models (e.g. roof age prediction) into our Geospatial AI Data Platform. 
● Code Quality & Optimization: Write clean, efficient, testable, and reusable Python code. Optimize data processing and platform latency to handle requests and queries at massive scale and high volume. 
● System Architecture: Contribute to the design and implementation of our Microservices and Serverless architectures, ensuring high availability, security, scalability and observability. 
● Collaboration: Work within an Agile team alongside Data Scientists, DevOps, and Product Managers to translate business requirements into technical solutions.

Required Qualifications: 
● B.Sc. degree in Computer Science or a related technical field. 
● Demonstrable professional experience as a Python Developer with a focus on data-intensive backend systems (4+ years). 
● Expert knowledge of Python 3, follow PEP8. 
● Experience developing using OOP and SOLID principles. 
● Proven experience designing and developing production-ready APIs using a modern Python web framework such as FastAPI or Powertools for AWS Lambda. 
● Experience with AWS services such as S3, SQS, EC2, API GW, Lambda, DynamoDB, CloudFormation/SAM using boto3. 
● Experience with Docker/Kubernetes. 
● Experience with Linux, preferably Ubuntu. 
● Experience with SQL Databases (e.g. PostgreSQL) 
● Experience with version control (Git) and collaborative development workflows. 
● Good communication skills in English

Preferred/Bonus Qualifications: 
● Experience with geo-spatial libraries (e.g., Geopandas, GDAL, Shapely, Rasterio). 
● Familiarity with model serving technologies such as NVIDIA Triton Inference Server. 
● Experience with Workflow Management platforms such as Apache Airflow. 
● Experience with on-prem servers. 
● Knowledge of CI/CD pipelines (GitHub Actions) and DevOps best practices

We are looking for a versatile and experienced Rust Engineer to join our dedicated team for a long-term collaboration. While the primary focus is building secure smart contracts for next-generation networks (like Casper), we need a specialist who sees the bigger picture. You will own the delivery of complex decentralized solutions—from on-chain logic to system integration. We value robust engineering principles and intellectual flexibility; if you are a strong Rust engineer willing to master blockchain specifics, we want to hear from you.

Who are we?

We are Out Of The Box Systems: a Ukrainian team of passionate, battle-tested engineers and creators united by one goal—delivering real results with clarity, precision, and autonomy. We champion a flexible, pragmatic approach over rigid, static processes. While our roots and primary team are in Ukraine, we collaborate with top talent from various labor markets. We specialize in demanding fields like Rust-first development, AI Engineering, and Computer Graphics, blending performance, security, and innovation into every project. We are deeply invested in the growth of our team members, believing that a person's ability to learn and their openness to feedback are the true keys to long-term success. Our team thrives on solving hard problems and doing the heavy lifting so our clients don’t have to.

Workload

• Full-time, remote collaboration.
• Flexible schedule, with expected availability for team syncs.
• Project-based workload with a focus on clear deliverables.

Responsibilities

• Take ownership of the full technical solution, designing and implementing secure smart contracts and the surrounding systems required to make them usable.
• Bridge the gap between on-chain logic and off-chain reality, designing integration patterns, backend services, and indexing strategies.
• Ensure the long-term reliability and security of the protocol by defining testing standards, conducting internal audits, and designing for upgradability.
• Solve complex distributed system problems, prioritizing performance and economic efficiency (gas/resource optimization) across the entire stack.
• Act as a technical leader and mentor, elevating the team’s standards through code reviews, architectural RFCs, and knowledge sharing.

Required Skills

• Rust Proficiency: Solid professional experience with Rust. You understand memory safety, concurrency, and how to write clean, idiomatic code.
• Engineering Fundamentals: Deep understanding of computer science principles, data structures, algorithms, and distributed systems architecture.
• Testing Culture: A strong habit of writing comprehensive unit and integration tests. You don't just write code; you prove it works.
• Intellectual Flexibility: A demonstrated ability (and willingness) to dive into new documentation, learn new protocols (like Casper/Wasm), and adapt to changing technical requirements.
• English Proficiency: Upper-Intermediate (B2) or higher, capable of discussing abstract architectural concepts clearly.

Preferred Skills

• Blockchain Experience: Experience with smart contract development on any chain (Casper, Solana, NEAR, Ethereum, Polkadot).
• Wasm & Compilers: Knowledge of WebAssembly or low-level compilation targets.
• Cryptography: Understanding of hashing, signatures (Ed25519/Secp256k1), and cryptographic primitives.
• Infrastructure: Experience with Docker, CI/CD pipelines, or cloud infrastructure (AWS/GCP).
• Backend: Experience with standard Rust backend frameworks (Tokio, Axum, Actix) and databases (PostgreSQL).

What you get

• The opportunity to architect and build challenging projects at the forefront of the Rust blockchain ecosystem.
• A transparent, friendly, and supportive team environment that values ownership and competence.
• A clear path for growth, where you are encouraged to experiment with and master new technologies.
• Competitive compensation based on your skills and experience.
• This is a long-term collaboration based on a 2-year B2B contract, reflecting our mutual investment in your growth and success with our team.