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Channel

Senior Java Developer

@seniorjavist

On this record: Topic · Growth · Engagement · What this channel posts · Advertising · Posts · Citations · Telegram's recommendations · Cite this entry

20,641subscribers

-98 since we began measuring on 7 August 2026

Risers and fallers across the register · movement among entries of 10,000–31,623.

Register entry

Telegram ID-1001529589156
TypeChannel
Username@seniorjavist
CreatedBetween 1 August 2021 and 28 February 2023 — estimated from Telegram’s id allocation, not measured. How this range is calculated.
First recorded7 August 2026
Last confirmed live18 September 2026
Measurements held30
Confirmed unchanged1 time, most recently 18 September 2026
On Telegramt.me/seniorjavist

Topic

Job listings — a classification, not a measurement. An on-box language model (Qwen3.6-35B-A3B-FP8, prompt version 1) read this channel’s own recent posts on 10 September 2026 and assigned it the closest of 31 fixed categories, at 44% confidence. This is a model’s judgement about what the channel is likely to be about, not a fact this register measured the way a subscriber count or a view count is measured — it can be revised on a later pass, and it carries no weight anywhere else on this page. How this classification works, and why it has no browse page of its own yet.

Growth

20,64120,73920,6907 August 2026 — 20,739 subscribers7 August 2026 — 20,739 subscribers8 August 2026 — 20,730 subscribers9 August 2026 — 20,733 subscribers10 August 2026 — 20,728 subscribers11 August 2026 — 20,719 subscribers12 August 2026 — 20,716 subscribers13 August 2026 — 20,711 subscribers15 August 2026 — 20,715 subscribers16 August 2026 — 20,716 subscribers18 August 2026 — 20,718 subscribers19 August 2026 — 20,712 subscribers20 August 2026 — 20,710 subscribers22 August 2026 — 20,705 subscribers23 August 2026 — 20,706 subscribers25 August 2026 — 20,696 subscribers26 August 2026 — 20,687 subscribers28 August 2026 — 20,691 subscribers28 August 2026 — 20,688 subscribers29 August 2026 — 20,687 subscribers30 August 2026 — 20,682 subscribers31 August 2026 — 20,678 subscribers3 September 2026 — 20,677 subscribers4 September 2026 — 20,670 subscribers7 September 2026 — 20,669 subscribers10 September 2026 — 20,668 subscribers12 September 2026 — 20,660 subscribers14 September 2026 — 20,652 subscribers16 September 2026 — 20,651 subscribers18 September 2026 — 20,641 subscribers7 August 202618 September 2026
30 measurements spanning 42 days, net -98. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 20,626–20,754 and does not start at zero.
Measurement log — every subscribers count we have recorded, most recent 20 of 30
Measured (UTC)SubscribersChange
18 Sept 2026, 06:3720,641-10
16 Sept 2026, 01:2220,651-1
14 Sept 2026, 09:3820,652-8
12 Sept 2026, 16:0120,660-8
10 Sept 2026, 18:3920,668-1
7 Sept 2026, 16:5920,669-1
4 Sept 2026, 18:0220,670-7
3 Sept 2026, 01:2820,677-1
31 Aug 2026, 20:1220,678-4
30 Aug 2026, 17:4520,682-5
29 Aug 2026, 19:3420,687-1
28 Aug 2026, 21:4320,688-3
28 Aug 2026, 00:0820,691+4
26 Aug 2026, 02:0520,687-9
25 Aug 2026, 02:1120,696-10
23 Aug 2026, 15:1320,706+1
22 Aug 2026, 04:2620,705-5
20 Aug 2026, 19:1320,710-2
19 Aug 2026, 16:0320,712-6
18 Aug 2026, 19:2320,718first reading

Engagement

42 posts held, back to 14 July 2026the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 59 pages of Telegram’s post history, 20 posts per page.

ERR · 30 days
8.07%
avg views ÷ 20,641 subscribers
Avg views / post
1,670
8 posts measured
Reaction rate
this channel exposes no reaction counts
Posts in window
8
of 42 held

ERR is average views per post over the last 30 days divided by subscribers, the definition TGStat uses, so this figure is comparable with the one you will see elsewhere. It falls structurally as a channel grows: a high ERR on a small channel and a low one on a large channel describe reach mathematics, not quality. We publish the figure and the sample it came from and pass no verdict on it.

ER is defined industry-wide as (forwards + reactions + comments) ÷ views — note the denominator is views, not subscribers. Telegram’s public web preview carries views and reactions but not forward or comment counts, so the reaction rate above is the reactions term only and is therefore a floor: the true ER for this channel is higher by an amount we have not measured and will not estimate.

What these figures were computed from
WindowRolling 30 days · latest post in window 3 September 2026
Posts held42 (14 July 20263 September 2026)
Views total13,328
Reactions total
Forwards / commentsnot exposed by the public surface — not measured, not estimated
Readings taken3 Sept 2026, 18:24 UTC

Views are a single reading per post, taken at the time above. A post published in the last day or two is still accumulating views, which pulls the 30-day average down slightly. That is a property of the standard definition rather than a fault in it, so we keep the definition rather than “correcting” the number into something nobody can reproduce.

Precision. Telegram publishes view counts on its public widget in short form — 8.12K, 3.7M — so any reading at or above 1,000 reaches us rounded to three significant figures, and only counts below 1,000 are exact. Averages and rates derived from them are shown to the same precision rather than to the unit: a figure like 3,701,250 would assert digits nobody measured.

Reaction counts are published per emoji and rounded the same way, so a total below 1,000 is exact and a larger one is a sum that may carry a rounded component from each emoji above 1,000. Because it is a sum, it does not look rounded — read a large reaction total as three significant figures per contributing emoji rather than as the figure it prints.

What this channel posts

Video runtime
46s
Average length
23s

Measured directly from 2 videos with a duration reading, out of the posts we hold for this channel — not this channel’s whole posting history, only the sample this register has actually read. An exact reading to the second, taken from the post itself rather than from Telegram’s own rounded chrome, so it carries no mark.

Advertising

Ad load
11.9%
5 of 42 posts carry an ad marker
Regulatory tokens
5
posts carrying an erid · 5 distinct tokens
Median views · ads
2,400
over 5 measured posts
Median views · rest
2,720
over 37 measured posts

An ad marker, not a judgement about a post. A post is counted here because it carries one of two explicit markings: an erid token, which Russian law has required on paid placements since 2022 and which is issued against a specific advertising contract, or a #реклама / #ad hashtag in the body, which is the channel declaring it itself. The first is documentary; the second is a self-declaration and is weaker. No classifier reads the text and decides — nothing on this site guesses that a post is an advertisement.

This is a floor, and it can only ever be a floor. A channel that runs paid placements without marking them produces no marker for us to count, and an unmarked ad is indistinguishable from an ordinary post on the public surface. The ad load above therefore means “the share of posts that declared themselves”, never “the share of posts that were paid for”. A low figure is not evidence of a channel that runs few ads.

Both figures are medians, and no ratio between them is published. Each is a view reading that actually occurred on a post, picked by percentile_disc rather than averaged, so one viral post cannot move it and no interpolated value is invented between two readings. They are printed side by side with the count behind each rather than as a ratio: an ad and an ordinary post are not otherwise matched — for topic, for length, for hour of day — so the gap between them is a description of two groups and not the effect of one being an ad.

Advertising tokens recorded on this entry
eridPostsFirst seenLast seen
2SDnje5fY2f116 July 202616 July 2026
2SDnjeE5cxT114 August 202614 August 2026
2VSb5xfm9w8119 August 202619 August 2026
2Vtzqw8Jxi7124 August 202624 August 2026
2VtzqxdhBtF118 August 202618 August 2026

A token repeated across several posts is one advertising contract placed more than once, which is what the identifier is for. The strings are reproduced exactly as they appeared in the post or in its click-through URL and are not validated against any registry — we record the marker a channel published, and whether it resolves to a real contract is a question for the register that issued it.

Measured over the 42 most recent posts we hold, published 14 July 2026 to 3 September 2026. Views are the latest single reading held for each post, and any reading at or above 1,000 is rounded by Telegram to three significant figures.

Recent posts

3 Sept 2026, 13:52 UTC628 viewsread 3 September 2026
Photo

7,2 млн рублей призового фонда и реальные задачи космической отрасли 🚀 В сентябре пройдет серия КосмоХакатонов для студентов, молодых ученых и специалистов. Участникам предстоит за два дня разработать собственное решение, поработать с экспертами и представить проект жюри. Участников ждут: 🛰 реальные задачи космической отрасли 👥 команды от 3 до 5 человек 💻 очный и онлайн-форматы 🧑‍💻 работа с экспертами и трекерами 🏆

2 Sept 2026, 20:54 UTC≈1,170 viewsread 3 September 2026
Photo

➡️ Picocli — мощный инструмент для создания CLI-приложений в Java Picocli — это простая и гибкая библиотека для создания командных интерфейсов (CLI) в Java. Она поддерживает аннотации для автоматической генерации документации по командам, обработку аргументов, подкоманд, автодополнение и много других возможностей, которые упрощают создание сложных CLI-приложений. 🗣 Picocli — это отличный выбор для разработчиков, ко

31 Aug 2026, 20:57 UTC≈1,600 viewsread 3 September 2026
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➡️ HikariCP — высокопроизводительный пул соединений для баз данных HikariCP — это лёгкий и быстрый пул соединений для баз данных, который считается одним из самых производительных в экосистеме Java. Он минимизирует задержки при подключении к базам данных, обеспечивая быстрый доступ к ресурсам и высокую масштабируемость. Благодаря простоте настройки и высокой производительности, HikariCP является отличным выбором дл

29 Aug 2026, 20:54 UTC≈1,910 viewsread 3 September 2026
Photo

Встроенные исключения Java определяет несколько классов исключений внутри стандартного пакета java.lang. Наиболее общие из этих исключений являются подклассами стандартного типа RuntimeException. Поскольку java.lang неявно импортируется во все java-программы, то большинство исключений, полученных из RuntimeException, автоматические. Java определяет несколько других типов исключений, которые относятся к его различн

28 Aug 2026, 20:48 UTC≈1,800 viewsread 3 September 2026
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Инкапсуляция Инкапсуляция в Java является механизмом обёртывания данных (переменных) и кода, работающего с данными (методами), в одно целое. В инкапсуляции переменные класса будут скрыты от других классов и доступ к ним может быть получен только с помощью метода их текущего класса. По-другому это называется скрытием данных. Для достижения инкапсуляции в Java: ☕️ Объявите переменные класса как private. ☕️ Предоставь

27 Aug 2026, 20:18 UTC≈1,820 viewsread 3 September 2026

#вопросы_с_собеседований В чем разница между Hashset и Treeset? Классы HashSet и TreeSet реализуют интерфейс Set и представляют наборы отдельных элементов. Кроме того, TreeSet реализует интерфейс NavigableSet. Этот интерфейс определяет методы, использующие порядок элементов. HashSet внутренне основан на HashMap, а TreeSet поддерживается экземпляром TreeMap, который определяет их свойства: HashSet не хранит элементы

25 Aug 2026, 20:47 UTC≈2,140 viewsread 3 September 2026

#вопросы_с_собеседований Для чего используются ключевые слова volatile, synchronized, transient, native? volatile вынуждает потоки отключить оптимизацию доступа и использовать единственный экземпляр переменной. Если переменная примитивного типа – этого будет достаточно для обеспечения потокобезопасности. Если же переменная является ссылкой на объект – синхронизировано будет исключительно значение этой ссылки. Все да

24 Aug 2026, 18:56 UTC≈2,260 viewsread 3 September 2026
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Зубчатый массив в Java Зубчатый массив — это массив массивов, в котором массивы элементов могут быть разных размеров, т. е. мы можем создать двумерный массив, но с переменным числом столбцов в каждой строке. Эти типы массивов также известны как зубчатые массивы. Подробнее о зубчатых массивах можно почитать здесь.

24 Aug 2026, 16:03 UTC≈2,000 viewsread 3 September 2026
Advertisementerid 2Vtzqw8Jxi7Video

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24 Aug 2026, 15:10 UTC≈1,560 viewsread 3 September 2026

#вопросы_с_собеседований Могут ли у разных объектов быть одинаковые hashCode()? Да, могут. Метод hashCode() не гарантирует уникальность возвращаемого значения. Ситуация, когда у разных объектов одинаковые хэш коды называется коллизией. Вероятность возникновения коллизии зависит от используемого алгоритма генерации хэш кода.

24 Aug 2026, 13:11 UTC≈1,780 viewsread 3 September 2026
Photo

👩‍💻 Работа с Kafka через библиотеку Kafka Clients Приглашаем на открытый урок. 🗓 26 августа в 20:00 МСК 🆓 Бесплатно. Урок в рамках старта курса «Java разработчик. Продвинутый уровень». Kafka Clients это нижний уровень для работы с Kafka из Java. Все более высокоуровневые библиотеки основаны на нем. Данный открытый урок проходит в рамках курса Java разработчик. Продвинутый уровень. О чем поговорим: ✔️ Чтение и отп

21 Aug 2026, 20:50 UTC≈1,990 viewsread 3 September 2026

#вопросы_с_собеседований Опишите различные типы примитивов и объемы памяти, которые они занимают. Java имеет 8 примитивных типов: ☕️ boolean — логическое значение true/false. Размер логического значения не определяется спецификацией JVM и может различаться в разных реализациях ☕️ byte — 8-битное значение со знаком ☕️ short — 16-битное значение со знаком ☕️ char — беззнаковое 16-битное значение ☕️ int — 32-битное зна

Showing the 12 most recent of 42 posts we hold for @seniorjavist. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Forward network

Republished by

Channels on the register that have forwarded this channel's posts into their own feed.

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 1 registered channel — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

Named by

Channels on the register whose posts name this channel's handle.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Appears in Telegram’s recommendations for other channels

The reverse of the list above, and a different kind of signal. This does not require this channel to have ever been asked about directly — each row below is a channel we DID ask Telegram about, whose Telegram-generated list happened to include this one. A channel can appear here with an empty list above it, because being named by someone else’s query is independent of having been queried itself.

Java библиотека
@javalib · 30,666
Telegram ranks this channel #1 of 84 here — alongside 83 others — read 7 September 2026
Библиотека джависта | Java, Spring, Maven, Hibernate
@javaproglib · 22,055
Telegram ranks this channel #4 of 88 here — alongside 87 others — read 21 September 2026
Senior Python Developer
@seniorpy · 39,864
Telegram ranks this channel #51 of 92 here — alongside 91 others — read 30 August 2026

This channel appears in 3 seed channels' Telegram-generated recommendation lists in total. Each is Telegram’s list for THAT channel, not this one — see how this is measured.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 18 September 2026 — this entry's latest reading, not the date you are reading this.

“Senior Java Developer” (@seniorjavist), 20,641 subscribers as measured 18 September 2026. Telegram Register, tgregister.com/channel/seniorjavist.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.