Skip to content
Open to workremote or relocation

Hi, I’m Nikita Reshetnik.I make things. Some talk back.

AI Engineer
RésuméGet in touchExplore experience

About

I’m an AI engineer with 5 years of experience building enterprise software, grounded in C#/.NET and backend engineering.

2024—2026 · 1 role

AI Engineering

I build AI services and evaluation pipelines, and help fellow engineers put AI tools to use.

2021—2024 · 5 roles

Software Engineering

I build features across .NET services, plugins, and desktop applications, with a focus on SQL performance, code quality, and release support.

Experience

  1. to

    AI Engineer

    ELEKS

    Led cross-functional delivery of LLM-powered services, with responsibility for AI evaluation, observability, and engineering workflows. Supported hiring, onboarding, and practical adoption of AI development tools.

    Highlights
    • Pioneered AI adoption in a mature enterprise product by designing dedicated .NET AI services from proof of concept to production. Delivered LLM-powered extraction, classification, rewriting, entity matching, conversational AI, and similarity-based retrieval for a platform serving hundreds of thousands of corporate users.
    • Built production LLM evaluation from the ground up using hundreds of reviewed cases, a golden dataset, human-calibrated LLM judges, and prompt and model regression testing in Azure DevOps, improving key evaluation metrics by approximately 5-20% across workflows.
    • Reduced inference costs by approximately 75% and latency by approximately 20% through model right-sizing, workload-based routing, and caching, with regression evaluations protecting output quality.
    • Provided technical and project coordination for a cross-functional team, guided AI architecture decisions, interviewed engineering candidates, and mentored QA specialists on testing non-deterministic AI functionality.
    • Modernized CI/CD pipelines, automated development and QA workflows, and built Grafana dashboards for AI infrastructure and database upgrades.
    • Led hands-on AI-driven development sessions for the project team and developers across the company, sharing practical GitHub Copilot and Cursor workflows.

  2. to

    Software Engineer

    ELEKS

    Delivered .NET features across microservices, a monolith, plugins, and a desktop client, with responsibilities spanning SQL performance, code quality, Agile coordination, and release support.

    Highlights
    • Delivered end-to-end features and bug fixes across RESTful microservices, a monolithic application, plugin packages, and the desktop client.
    • Developed and optimized complex SQL queries for data retrieval, manipulation, and reporting. Collaborated with database engineers to refine query execution plans and improve database performance.
    • Reviewed code, promoted sound design and best practices, and proactively suggested legacy code refactors to improve maintainability and align with modern .NET standards.
    • Participated in Agile planning, daily stand-ups, and retrospectives, and led these activities on a rotating basis.
    • Worked with QA and DevOps on releases, resolving deployment issues and supporting smooth rollouts.

  3. to

    Junior Software Engineer

    ELEKS

    Developed and integrated features across backend services and plugins, resolved client support issues, and contributed through code reviews, pair programming, and shared technical documentation.

    Highlights
    • Delivered features and bug fixes across RESTful microservices, a monolithic application, and plugin packages, integrating changes across system components.
    • Reviewed peers’ pull requests and paired on complex tasks.
    • Investigated and resolved client-specific support tickets requiring technical and domain knowledge.
    • Created and maintained developer wikis for environment setup, installation, and API documentation, and curated a shared SQL query library to support investigations and data generation.

  4. to

    Trainee Software Engineer

    ELEKS

    Contributed supervised REST API changes and fixes while learning .NET practices, project architecture, and the time-management and legal domain. Maintained onboarding documentation and developed stakeholder communication skills.

    Highlights
    • Delivered basic REST API changes and bug fixes under supervision, integrating them with other team components.
    • Collaborated with senior developers to adopt modern .NET practices and understand project architecture.
    • Quickly ramped up on the time-management and legal domain while learning to communicate effectively with project stakeholders.
    • Created and updated developer wikis covering environment setup and project guidelines, supporting onboarding for future team members.

  5. to

    Software Engineer Intern

    ELEKS

    Practiced ASP.NET REST API development through the AutoHubAPI project and presented the application and progress to company management, leading to employment.

    Highlights
    • Built AutoHubAPI, an ASP.NET Web API pet project, to learn and practice REST API development in a monolithic, multi-layer architecture.
    • Presented the application and my progress to company management, which led to employment.

  6. to

    Software Engineer Intern

    Sigma Software Group

    Collaborated with fellow interns on a full-stack car rental application, contributing to Figma-based interface implementation and backend unit and integration testing.

    Highlights
    • Developed a full-stack car rental application with a team of interns.
    • Designed the front end using Figma mockups and implemented a responsive, user-friendly interface.
    • Achieved at least 80% unit and integration test coverage on the back end.

Recommendations

  • I worked with Nikita for over 2 years and I would strongly recommend to work with him as a software engineer. I want to emphasize that Nikita is not just a developer who writes code - he is a true engineer, curious about modern problems, innovative technologies and is always ready to take on new challenges. Nikita is eager to gain new knowledge that might be helpful in his line of work, which makes him a valuable asset for every team.

    Khrystyna VelychkoSenior Project Manager @ Cossack Labs

  • I had the pleasure of working with Nikita and can confidently say that he is a highly talented and driven professional. Despite being early in his career, he demonstrates exceptional analytical skills and a mature, thoughtful approach to problem-solving. He has strong ability to think outside the box when the situation calls for it. He consistently brought fresh, well-grounded ideas to the table that added real value to our work. Collaborating with him was both productive and enjoyable. He’s a quick learner, proactive, and has great potential for growth.

    Yaroslav ZubetsSoftware Engineer @ Meta

  • It is a great pleasure working with Nikita. Nikita is result-oriented, a fast learner, and often completes tasks much faster than expected. Nikita is also great at team communication and collaboration. Highly recommend Nikita.

    Antony MelnykTeam Lead @ ELEKS

Education

Academic

Bachelor’s degree, Software Engineering

State University of Information and Communication Technologies

September 2019 — June 2023

Professional credentials

Skills

AI / Machine Learning

Programming Languages

Backend

Data

Cloud & DevOps

Observability & CI/CD

AI Development Tools

Selected work

See all projects

Code activity

Open

Merged

Show more 3 more Merged pull requests and contribution calendarShow less 3 more Merged pull requests and contribution calendar
Contributions (3287)
NovDecJanFebMarAprMayJunJulAugSepOct

Writing

See all articles

Let's talk

Have a role, project, or engineering challenge worth discussing? Email me directly or connect through one of the links.

E-MailLinkedInTelegramGitHubLeetCodeBook a call