Aliaksei S.-Backend Developer (Java)
Check rate
Experience
Backend Developer (Java)
naviparking.com
- java 17
- spring
- hibernate
- postgres
- redis
- aws (sqs, s3)
- kubernetes
Backend Developer (Java)
blynk.io
- IoT project with high throughput: up to 200k rps, up to 50k devices online, single instance
- Low-level usage of Netty (dynamic protocol detection, low-level concurrency handling etc)
- Custom binary protocol for communication with devices
- java 17, netty, websockets, custom binary protocol, clickhouse, maven
- Implemented custom protocol for interacting with customer’s devices
- Implemented order management system based on real-time data from devices from scratch
- Improved company’s estimations approach, forced development to bring product earlier than required by the contract
Backend Developer (Java)
viber.com
- Advertising management backoffice API
- java 11, spring, AWS services (ECS, RDS, DynamoDB, S3, SQS)
- Implemented set of internal services (ads management, ad messaging API, reporting), thus improving interactions with company’s clients
- Set up monitoring of current prod solution and improved prod environment
- Contributed to code style approach in order to keep balance between happy developers and team efficiency
Backend Team Lead
av.by
- Classified ads site
- symfony, MySQL, Redis, ElasticSearch, Logstash, Docker, PHPUnit, Behat
- Built a new team from scratch
- Designed a new system and interactions with frontend
- Prepared specifications for backend team
- Set up new team’s processes, contributed to solving communication issues with new departments
- Handled migration from bare-metal to cloud provider, fixing cloud-related issues
- Contributed to building new estimations / project management approach
Backend Developer (PHP)
everhour.com
- Time-tracking application integrated with most popular task tracking systems
- symfony (PHP framework), MySQL, Redis, ElasticSearch, REST API, PHPUnit, Behat
- Development team size: 4+
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Telecommunication, and Automotive.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, and Project Management.
Summary
- Backend developer since 2011.
Skills
- Java, Spring, Spring Boot, Hibernate, Jdbc, Maven, Gradle, Netty
- Postgres, Mysql, Clickhouse, Elasticsearch, Redis, Memcached
- Docker, Kubernetes, Jenkins, Ansible, Argocd
- Aws (Ecs, Rds, Dynamodb, S3, Sqs)
- Elk, Grafana, Opensearch, Logstash, Newrelic, Prometheus
- Http, Rest, Soap, Websockets, Tcp, Graphql
- Rabbitmq
- Java (4.5+ Years), Php (7 Years), C++ (1.5 Years), Erlang (0.5 Year)
Languages
Education
BSUIIR
bachelor’s degree · Telecommunications Engineering · Minsk, Belarus
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Aliaksei is based in Gdańsk, Poland and can operate in on-site, hybrid, and remote work models.
Aliaksei speaks the following languages: Russian (Native), English (Advanced), Polish (Intermediate).
Aliaksei has at least 11 years of experience. During this time, Aliaksei has worked in at least 3 different roles and for 5 different companies. The average length of individual experience is 2 years and 2 months. Note that Aliaksei may not have shared all experience and actually has more experience.
Based on recent experience, Aliaksei would be well-suited for roles such as: Backend Developer (Java), Backend Team Lead, Backend Developer (PHP).
Aliaksei's most recent position is Backend Developer (Java) at naviparking.com.
In recent years, Aliaksei has worked for naviparking.com, blynk.io, and viber.com.
Aliaksei is most experienced in industries like Information Technology, Telecommunication, and Automotive.
Aliaksei is most experienced in business areas like Information Technology, Product Development, and Project Management.
Aliaksei has recently worked in industries like Information Technology and Telecommunication.
Aliaksei has recently worked in business areas like Information Technology and Product Development.
Aliaksei holds a Bachelor in Telecommunications Engineering from BSUIIR.
The availability of Aliaksei needs to be confirmed.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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