Jobs at Djinni

Project Description:

One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.

Responsibilities:

We are looking for a Software Engineer to contribute to the development of a global optimization capability for petroleum surface networks within the NEXUS reservoir simulator.
This role is product-focused and centers on building, integrating, and hardening a Bayesian Optimization (BO)–based engine that complements the existing gradient-based GRG optimizer. The feature enables reservoir and production engineers to identify more robust and globally optimal well control strategies—such as gas-lift allocation and choke settings—when dealing with highly non-linear and multimodal network behavior.
You will work as part of a product engineering team, collaborating closely with domain experts, QA, and platform engineers to deliver maintainable, performant, and user-ready functionality into a production-grade simulator.
What You’ll Work On:
Implement and integrate Bayesian Optimization workflows within the existing NEXUS surface network optimization framework
Develop and maintain Gaussian Process–based surrogate models used during optimization runs
Integrate acquisition functions that support reliable decision-making across challenging objective landscapes
Implement initial sampling strategies to ensure stable and repeatable optimization outcomes
Contribute to performance tuning, memory efficiency, and parallel execution in large simulation workloads
Improve code robustness, testability, and maintainability in a long-lived product codebase

Mandatory Skills Description:

Programming & Implementation:
Fortran 90/95:
Experience working with modules, allocatable arrays, and structured Fortran code
Ability to modify and extend existing numerical code responsibly

Numerical Computing:
Numerical linear algebra fundamentals
Practical use of Cholesky decomposition and triangular solves
Experience using LAPACK routines
Awareness of numerical stability and basic conditioning issues

Optimization & Modeling:
Gaussian Process regression (practical level):
Understanding of GP concepts (mean, covariance, kernels)
Ability to implement or adapt GP prediction code with guidance
Bayesian Optimization concepts:
Familiarity with acquisition functions such as Expected Improvement (EI) and Upper Confidence Bound (UCB)
Understanding of exploration vs. exploitation from a user-outcome perspective

Sampling & Experiment Design:
Latin Hypercube Sampling (LHS)
Experience implementing or using space-filling designs for initial parameter exploration

Product & Engineering Expectations:
Focus on reliability, usability, and repeatability rather than experimental novelty
Write clear, maintainable code aligned with existing platform standards
Ensure features behave predictably across a wide range of customer models
Collaborate with QA and support teams to diagnose and resolve field issues
Be mindful of performance, memory usage, and MPI execution constraints

Nice-to-Have Skills Description:

Exposure to reservoir simulation or production optimization domains
Experience working on large, long-lived scientific software products
Familiarity with user-facing configuration workflows or optimizer settings

We are looking for HR Generalist to join our team. 

Key Responsibilities

• Manage end-to-end recruitment for selected roles (sourcing, screening, interview coordination).
• Oversee onboarding & offboarding processes to ensure a smooth and positive experience.
• Maintain HR documentation, employee records, and internal HRIS data.
• Support performance review cycles, feedback processes, and employee surveys.
• Handle day-to-day HR operations: contracts, extensions, probation periods, compliance.
• Monitor employee satisfaction, engagement, and retention signals.
• Collaborate with leadership on workforce planning and internal policies.
• Assist with organizing internal events, team activities, and communication initiatives.
• Prepare HR reports, analytics, and dashboards (headcount, attrition, hiring pipeline, etc).
• Act as a point of contact for employees on HR-related questions.

Requirements

• 4 years of experience in HR, recruitment, or people operations.
• Understanding of HR processes and employment lifecycle.
• Ability to maintain confidentiality, structure, and high attention to detail..
• Experience with HR tools (HRIS, ATS, spreadsheets, analytics).
• Problem-solving mindset, ability to work independently and prioritize effectively.
• English — upper-intermediate or higher.

What We Offer

• Flexible remote work.
• Supportive and transparent culture.
• Opportunities to grow into HRBP / People Partner role.
• Participation in internal people-ops projects and process improvements.
• Competitive salary and benefits package.

About the Role

We’re looking for a Project Manager to lead delivery of AI voice assistant solutions for legal clients (law firms, legal services, intake automation).

This is not a coordination-only role. You’ll own:

• client communication
• scope definition
• delivery timelines
• and making sure the product actually works in production

You’ll work closely with engineers building:

• AI voice agents (LLMs + speech-to-text + TTS)
• automation workflows
• integrations (CRM, telephony, APIs)
  
  Responsibilities
• Lead end-to-end delivery of AI voice assistant projects
• Run discovery calls with legal clients (understand workflows, intake processes, compliance needs)
• Translate business needs into clear technical tasks
• Manage backlog, priorities, and sprint planning
• Coordinate developers (AI, backend, frontend)
• Ensure quality of conversations (voice flows, prompts, edge cases)

Job Description

• Knowledge of JavaScript or Python
• Understanding of software development lifecycle (SDLC)
• Basic understanding of testing concepts (types of testing, bug lifecycle)
• Familiarity with Git or any version control system
• Analytical thinking and attention to detail
• Good communication skills
• English level: Intermediate (B1) or higher
   

Job Responsibilities

• Assist in writing and maintaining test cases and test documentation
• Execute manual tests and report defects
• Support development of automated test scripts
• Work with existing test automation frameworks
• Collaborate with developers and QA engineers to understand requirements
• Participate in code reviews and QA meetings
• Learn and apply CI/CD and testing best practices
   

Department/Project Description

Our client is a leading world international company which provides a dynamic, automated printing solution allowing users to create and monitor label printing on large manufactures. Our team is working together with the client as a single unit extending the capabilities of a Common Platform, a microservice-based system which provides a set of services to control printers, including the HMI layer. The main product features include a customizable web browser interface for operators to design labels, manage and monitor printers individually or in groups, access printer dashboards, configure and manage automated printing applications dynamically.
 

Skill Category

JavaScript 
Python
 

Keyskills - Must Have

• JavaScript
• Python
• Regression testing
• Smoke testing

Project Description:

Our team is working for one of the world's largest providers of products and services for the ever-evolving needs of the energy industry. Oil and gas domain, well logging.
We are working with Azure cloud, GIT, Kubernetes, using C#, C++ last standards (C++ 17, potentially 20). Using SCRUM framework.

Responsibilities:

• Review and analyze tasks in Product Backlog Items provided by Product owner
• Participation in grooming sessions and proactive task requirements and acceptance criteria clarification
• Work as part of a team using Azure environment
• Work with the team on development and resolving issues
• Implement software changes from Product Backlog Items and technical requirements
• Work with the QA team to determine if the application fit Product Backlog Items and technical requirements
• Identify and fix bugs, find solutions to the problems
• Maintain code quality, organization, and automatization
• Maintain the developed software efficiently through a solid knowledge of software lifecycle

Mandatory Skills Description:

• 4+years of experience and strong knowledge in C/C++
• 3+ years’ experience and strong .NET/C# knowledge
• Environment and tools: Docker, GIT, CMake, WCF
• SOA, Microservices, Solid principles, DDD
• Experience with databases (SQL)
• Problem-solving, proactive in task clarification, analytical thinking
• SCRUM framework knowledge and understanding of SDLC
• English level: Intermediate+
• Ability to work effectively in a team and with international clients

Nice-to-Have Skills Description:

• gRPC
• Kubernetes
• Multithreading knowledge
• PowerShell scripting
• Azure cloud
• Oil and Gas domain knowledge

Project Description:

Client is a top one in automotive sphere. He has a bunch of projects which are related with tools for testing/emulation of IVI part. Part team is in Detroit and part in Ukraine remote. Projects have parts starting from HW boards and completing with SW part.

Responsibilities:

Testing Balance: 70% Automation / 30% Manual testing split.
Embedded automation: actively contribute and evolve existing automation framework (Python).
Protocols: Hands-on experience with CAN, gRPC, and TCP.
Embedded Systems: Expertise in hardware flashing and embedded environment interaction.
OS: Linux knowledge and CLI proficiency.
CICD: Experience with GitHub Action.
Test Planning: Define the automation strategy for new features, ensuring high coverage for complex automotive use cases.
Reporting & Analytics: Build reports to visualize test results, hardware stability metrics.

Mandatory Skills Description:

Automotive experience
Understanding of CAN
Python: Advanced proficiency to evolve and maintain an existing automation framework.
Protocols: Hands-on experience with CAN, gRPC, and TCP.
Embedded Systems: Expertise in hardware flashing and embedded environment interaction.
OS: Linux knowledge and CLI proficiency.
CICD: Experience with GitHub Action.

Languages:

English: B2 Upper Intermediate

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

4-6 years of experience is ok

Responsibilities

— Modernize legacy systems( C#) via redesign and refactoring.

— Build APIs with proper security and lifecycle governance.

— Collaborate with UX, product, and architecture teams.

— Optimize backend performance.

— Support public API documentation and governance.

Skills

— Strong ( C#) Jbackend capability.

— Experience with modernization and migration projects.

— Understanding of microservice and API design.

— Familiarity with CI/CD, linting, testing frameworks.

— Knowledge of security and performance patterns.

— Good collaboration across UX and backend teams.

In addition to this, if you have commercial experience with Java backend or React frontend — it will be a strong plus.

Recruitment steps:

• HR interview (30-45 min)
• Tehnical interview with live coding (40-45 min)
• Final client interview (30-45 min)
• Backround check
• Job Offer

The assignment is for between 26 to 32 months. You will work in a team of 9 engineers. The assignment is to migrate from monolith to microservices.

Important: the candidate must have worked/lived in Poland for the last 2+ years

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

For background check — you must be a taxpayer in Poland for 2+ years.

Project Description:

We are seeking a highly skilled Snowflake Data Engineer with 7 years of IT experience to design, build, and optimize scalable data pipelines and cloud-based solutions across AWS, Azure, and GCP. The ideal candidate will have strong expertise in Snowflake, ETL Tools like DBT, Python, visualization tools like Tableau and modern CI/CD practices, with a deep understanding of data governance, security, and role-based access control (RBAC). Knowledge of data modeling methodologies (OLTP, OLAP, Data Vault 2.0), data quality frameworks, Stream lit application development and SAP integration and infrastructure-as-code with Terraform is essential. Experience working with different file formats such as JSON, Parquet, CSV, and XML is highly valued.

Responsibilities:

• Design and develop data pipelines using Snowflake and Snow pipe for real-time and batch ingestion.
• Implement CI/CD pipelines in Azure DevOps for seamless deployment of data solutions.
• Automate DBT jobs to streamline transformations and ensure reliable data workflows.
• Apply data modeling techniques including OLTP, OLAP, and Data Vault 2.0 methodologies to design scalable architectures.
• Document data models, processes, and workflows clearly for future reference and knowledge sharing.
• Build data tests, unit tests, and mock data frameworks to validate and maintain reliability of data solutions.
• Develop Streamlit applications integrated with Snowflake to deliver interactive dashboards and self-service analytics.
• Integrate SAP data sources into Snowflake pipelines for enterprise reporting and analytics.
• Leverage SQL expertise for complex queries, transformations, and performance optimization.
• Integrate cloud services across AWS, Azure, and GCP to support multi-cloud data strategies.
• Develop Python scripts for ETL/ELT processes, automation, and data quality checks.
• Implement infrastructure-as-code solutions using Terraform for scalable and automated cloud deployments.
• Manage RBAC and enforce data governance policies to ensure compliance and secure data access.
• Collaborate with cross-functional teams including business analysts, and business stakeholders to deliver reliable data solutions.

Mandatory Skills Description:

• Strong proficiency in Snowflake (Snowpipe, RBAC, performance tuning).
• Hands-on experience with Python , SQL , Jinja , JavaScript for data engineering tasks.
• CI/CD expertise using Azure DevOps (build, release, version control).
• Experience automating DBT jobs for data transformations.
• Experience building Streamlit applications with Snowflake integration.
• Cloud services knowledge across AWS (S3, Lambda, Glue), Azure (Data Factory, Synapse), and GCP (BigQuery, Pub/Sub).

Nice-to-Have Skills Description:

- Cloud certifications is a plus

Languages:

English: B2 Upper Intermediate

Project Description:

One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.
Product being developed is a cloud solution for interpretation of geological and geophysical data. Project is based on SCRUM methodology.
Our project is stable, long-term and constantly adopts new technologies such as newest Java and Eclipse RCP versions, cloud and GPU computing, microservices architecture and other innovative frameworks.
Work supposes close cooperation with Customer team located in Houston and following Agile principles.
Our team is senior, supportive and friendly.

Responsibilities:

• Collaborate closely with geophysicists, data scientists, and software engineers to translate scientific domain requirements into robust on-prem or Cloud software
solutions.
• Design, develop, and maintain high-performance applications for geophysical and geological data analysis, interpretation and visualization (e.g., seismic, horizon,
fault, velocity model, etc.)
• Present architectural designs and technical proposals to the architecture review board.
• Ability to break down development tasks and lay out clear implementation roadmaps.
• Implement and optimize computation algorithms
• Design and develop both thin and thick client applications that interact with cloud-based microservices.
• Ensure high code quality through unit testing, code reviews, security hardening and continuous integration with other domain tools
• Provide technical support and lead user troubleshooting sessions to resolve issues and ensure smooth operation of DSG application.
• Mentor junior developers and actively contribute to architectural and implementation decisions.
• Embrace Agile/Scrum methodologies, delivering and demonstrating working solutions at the end of each sprint
• Stay current with emerging technologies and trends in geophysical computing and software development.

Mandatory Skills Description:

6+ years of hands-on Java development experience
Strong Java Core knowledge
Experience with desktop development frameworks: Swing, SWT, or Eclipse RCP
Proven experience designing and building complex systems end-to-end, not just maintaining or extending existing ones
Practical understanding of multithreaded programming: ability to implement concurrency in code directly, not only through third-party libraries
Solid knowledge of design patterns and software architecture principles
Ability to clearly articulate past projects, personal responsibilities, and concrete individual contributions
Experience working in non-microservices, non-cloud-native development environments (desktop, embedded, or domain-specific platforms)
Stable career trajectory, no fragmented job history with short tenures

Nice-to-Have Skills Description:

C++ development skills
Practical experience with the Eclipse RCP framework
OSGi knowledge
Oil & Gas domain experience

Languages:

English: B2 Upper Intermediate

We are looking for an attentive and responsible Electronics Assembler who will work with SMD components and ensure high‑quality PCB assembly. The role involves manual soldering, microscope work, and strict adherence to technological and ESD requirements.

Responsibilities:

• Manual assembly of basic SMD components
• Component removal and replacement under mentor supervision
• Cleaning PCBs after soldering
• Visual inspection of solder quality under a microscope
• Following technological instructions and ESD requirements

• Maintaining a clean and organized workspace

   

Requirements:

• Basic manual soldering skills for SMD components
• Experience working with 0603 / 0805 components (0402 is a plus)
• Ability to solder simple packages: SOT, SOP/SOIC
• Basic experience with a soldering station, hot air gun, and microscope
• Understanding of assembly drawings, component orientation, and polarity
• Knowledge of ESD protection practices
• Accuracy, attention to detail, patience
• Ability to work according to instructions
• Willingness to learn and grow professionally

• Responsible attitude toward work quality

   

Nice to Have:

• Experience assembling 0402 (ideally 0201) components
• Ability to solder QFN / DFN, LQFP / TQFP packages
• Experience working with RF boards and high‑frequency circuits
• Understanding of RF‑component soldering specifics (minimal overheating, solder geometry control)
• Experience with BGA assembly or rework
• Background in small‑batch or prototype production
• Skills in rework/replacement of QFN / LQFP / small RF components
• Understanding of reflow soldering thermal profiles

The company offers:

• Official employment with a competitive salary and clear, transparent terms of cooperation.
• Paid vacation (24 calendar days per year) and paid sick leave.
• Deferment from military service.
• An atmosphere of trust, open communication, and leadership — initiative is welcomed, ideas are brought to life, and the team supports your progress.
• English language classes.
• Compensation for educational and training programs.
• Team buildings and corporate events in a friendly and collaborative environment.

Responsibilities

• Manage CEO’s calendar, meetings, and priorities
• Track tasks, decisions, and deadlines; follow up until completion
• Send timely reminders and ensure commitments are met
• Plan schedules and meetings
• Coordinate communication with teams and partners
• Handle orders, logistics, and administrative tasks
• Maintain organized systems, documents, and records
• Provide proactive, reliable day-to-day support to the CEO

Skills & Qualifications

• Advanced English (written and spoken)
• Highly organized, detail-oriented, and reliable
• Strong follow-up and time-management skills
• Ability to prioritize and manage multiple tasks
• Excellent communication and discretion
• Proactive, self-driven, and solution-oriented

• Readiness to work from 11:00 to 20:00 Kyiv time
   

  We offer

• Medical insurance after the trial period ending;
• Team-building activities;
• 24 paid vacation days per year;
• 5 paid sick leave days per year.

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

Our client is a fast-growing digital platform that transforms how organizations manage complex financial workflows and user roles across multiple tiers. We’re looking for an skilled and proactive Angular developer to join a lean and agile engineering team working on a modern, modular, performance-optimized web application. The ideal candidate will be able to take full ownership of features, ensure real-time performance and fast pace of development.

You will be joining a project that combines user-centric dashboards, secure document flows, automated validation systems, visual analytics, and flexible admin tools — all designed to simplify interaction between companies, consultants, and regulatory bodies.

Responsibilities

• Enhance table components using Angular 12+
• Update real-time dashboards, tables, charts to Angular 21+
• Work with real-time data using WebSockets-based API
• Participate in architecture discussions
• Handle large datasets optimizing rendering performance
• Provide estimations
• Deliver features on time
• Maintain high code quality
• Collaborate and communicate efficiently with your team 

Requirements

• Good knowledge of Angular (12+)
• Strong understanding of RxJS, Observables, and reactive UI patterns
• Knowledge of Angular Material
• Understanding of browser runtime, rendering pipeline
• Understanding of performance optimizations in real-time updates via WebSockets
• Ability to debug, refactor, and optimize large-scale applications

Nice to Have

• Experience with complex forms, step-by-step user flows
• Excellent communication skills

We look forward to your application!

About us:
 

BetterMe — a global wellness ecosystem empowering millions to become better — physically, mentally, and emotionally. We build what makes people better and keep challenging ourselves to inspire others.

Your impact:
 

• Assist marketing team with operational tasks.
• Deliver research on marketing activities and analyze content within the Health & Fitness sphere.
• Reviewing advertisements to ensure alignment with company policies and guidelines.
• Configure, launch, conduct advertising campaigns on Facebook/Google/etc.
• Generate ideas for new advertising campaigns.
• Monitor performance of marketing campaigns, look for the causes of deviations and opportunities for growth.
• Set technical task for creative and content teams.
   

About you:
 

• Junior marketing specialist or recent graduate in Marketing / Business / Economics / Analytics.
• Intermediate+ English level.
• Strong analytical and research skills, with the ability to work with data, draw insights, and support decision-making.
• Motivated to grow in digital marketing within a leading Ukrainian Health&Fitness Tech company.
• Detail-oriented, structured, and proactive.
• Quick learner, self-motivated, and eager to test ideas.
   

Would be a plus:

• Experience working with data (Excel/Google Sheets).
• Previous experience in digital marketing or analytics projects.
• Knowledge of Facebook Ads Manager or Google Ads Manager, or holds relevant digital advertising certification.
   

What you get at BetterMe:

A mission that inspires. Every line of code, every design, every idea helps millions of people become healthier and more confident.
Trust without micromanagement. You manage your time and make decisions independently. We value outcomes, not online hours.
Growth opportunities. 90% of our leads have grown within the company. There’s space for initiative, new responsibilities, and real career upgrades.
Flexible work format. The opportunity to work fully remotely.
Open communication. Transparency across teams, honest feedback, and support for initiatives are part of our everyday culture.

Find more about us on social media platforms: Instagram, LinkedIn.