Northern Ireland · Under 19 · Final 26 November 2026

Sentinus Young Innovators coding help

Northern Ireland runs its own STEM competition and almost nobody outside it knows. Sentinus Young Innovators picks a Young Scientist, a Young Engineer, a Young Mathematician and a Young Coder of the Year, and unlike almost every project competition in Britain, the coding and mathematics titles are not decided by something submitted from home. Finalists come to Ulster University in Belfast on a Thursday in November and are given ninety minutes, live, in front of a panel. You cannot polish that, and you cannot outsource it, which makes preparing for it a completely different job.

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Quoted from Sentinus with the date we read it · Our own arithmetic on the age rule · No prize money printed

In short

Sentinus Young Innovators 2026 chooses Northern Ireland's Young Scientist, Young Engineer, Young Mathematician and Young Coder of the Year, with an overall Sentinus Young Innovator above them. "Applications must be aged under 19 on July 1st 2027." Scientists submit a poster by 29 September 2026 and engineers by 30 September 2026, while the mathematics and coding categories run "an assessment in late September 2026, to select the finalists"; the first two allow individuals or "teams of up to 3 people" and the second two are individual. The final is "Thursday 26th November 2026" at Ulster University, Belfast, where mathematics finalists face "a 90 minutes live maths challenge" and coders "a 90 minute coding challenge", judged by a panel of industry experts. The overall winner receives a funded trip to the International Science and Engineering Fair 2027 in the USA. We teach the coding and the mathematics. A first class is free; a group place is USD 100 a month and one-to-one teaching USD 150.

Where to start

Three courses for a Sentinus finalist

A live challenge rewards what a student can produce unaided, which is a narrower thing than what they know.

Python for Teens course thumbnail

SYI / 01

Python from start to finish

For the coding final: writing and debugging without looking things up, which is the whole skill on the day.

Open the syllabus →
Maths Olympiad & Competition Course course thumbnail

SYI / 02

Olympiad and competition maths

For the mathematics final: unfamiliar problems worked to an answer under a clock.

Open the syllabus →
Problem Solving for Teens course thumbnail

SYI / 03

Algorithms and data structures

For choosing a method quickly and knowing it will finish inside the time.

Open the syllabus →

The competition

Four titles, two routes in, one day in Belfast

Facts read at the organiser's own pages on 20 September 2026.

Sentinus Young Innovators 2026 as its organiser describes it
PartScientist and EngineerMathematician and Coder
How you get inAn online poster submission"An assessment in late September 2026, to select the finalists"
Deadline29 September 2026 for scientists, 30 September for engineersThe assessment, in late September
Who can enter"Individuals" or "teams of up to 3 people"Individual entries
At the finalThe project is judgedA live 90-minute challenge
Judged byA panel of industry expertsA panel of industry experts
The dateThursday 26 November 2026Thursday 26 November 2026
The venueUlster University, BelfastUlster University, Belfast
Eligibility"Aged under 19 on July 1st 2027""Aged under 19 on July 1st 2027"

The split between the two columns is the thing to understand first. A scientist or engineer prepares work at home and brings it; a mathematician or coder sits an assessment to qualify and then performs on the day. They are different competitions wearing one name, and a student should know which one they are entering before September.

Above the four titles sits the overall Sentinus Young Innovator, whose prize is a funded trip to the International Science and Engineering Fair in the USA in 2027. The other category winners receive a cash prize, which the organiser publishes in pounds and we do not print.

For a school in Northern Ireland this is the nearest thing to a home fixture on our whole competitions calendar. Almost everything else on it is run from England and sat at a desk; this one ends with a day at Ulster University and a panel who work in the field.

It also runs early. The assessment is in late September and the final in November, so a student thinking about it in October has already missed the first stage. That is worth knowing in the summer term, not the autumn.

Source: Sentinus Young Innovators, read 20 September 2026. Modern Age Coders is not connected with Sentinus or Ulster University.

The method

The age rule is a Northern Ireland school-year rule

Sentinus sets eligibility by birthday rather than by year group. In Northern Ireland, and only there, those two things come to almost exactly the same thing.

The rule is "aged under 19 on July 1st 2027". Turn that into a birth date and something interesting appears.

Our arithmetic of 20 September 2026
StepResult
"Under 19 on 1 July 2027" means born after1 July 2008
Northern Ireland's compulsory school age cut-off2 July
So a Northern Ireland school year runs from2 July to 1 July
A pupil born 30 June 2008 isToo old, and a school year above
A pupil born 2 July 2008 isEligible, and in the year below

Why this is unusual

An age rule normally cuts across a year group, so a class contains some eligible pupils and some not. Here the rule falls on the school-year boundary itself, so whole year groups are in or out together.

Why only in NI

England uses 1 September. The same "under 19 on 1 July" rule applied to an English school would split a year group roughly in half, which is exactly the confusion this avoids in Belfast.

What a teacher can do with it

Check one pupil's birthday and you know about the whole class. That is worth thirty separate checks in a busy September.

None of this is an accident of luck; it is what happens when a Northern Ireland organisation writes a rule for Northern Ireland schools. It is also the kind of detail that gets lost when a UK-wide site copies an eligibility line without asking which school system it was written for.

It matters practically because sixth form in Northern Ireland runs to Year 14 rather than Year 13, and students assume an under-19 rule excludes them. Often it does not.

The wider lesson, for anyone who writes rules, is that a date is never just a date: it belongs to a system. Our UK page works through the four different school-start rules in Britain and what one birthday does under each of them.

The Northern Ireland cut-off we use here was read at the Department of Education for that page on 19 September 2026, and our own first draft of the rule was a year out, which is recorded there too.

The arithmetic is ours, computed on 20 September 2026 from the organiser's published eligibility rule and the Northern Ireland compulsory school age cut-off.

The final

Ninety minutes, live, with nothing brought in

A live final is not a harder version of a take-home task. It tests a different thing, and it can be practised.

What a live challenge rewards, and what it does not
RewardedWhyNot rewarded
Writing code from memoryThere is no time to look up how a thing is spelledKnowing where to find an answer
Choosing a method quicklyNinety minutes is enough for one good plan and not twoExploring three approaches
Starting with something that runsA partial working program beats an unfinished elegant oneDesigning before typing anything
Reading the whole task firstLate requirements change early decisionsStarting at the first sentence
Calm under observationA panel is watching, and that is a skill of its ownAnything practised only alone and untimed

The single most useful practice is the least fashionable: sit down with a clock, no internet, and a problem you have not seen, for ninety minutes, once a week. Everything else follows from finding out what you actually reach for when nothing can be looked up.

The second is to get something running in the first fifteen minutes, even if it only handles the simplest case. A student with a working partial answer at minute eighty is in a far better position than one with an ambitious half-finished design.

For the mathematics final the shape is the same: ninety live minutes, unfamiliar problems, no reference. The olympiad pages on this site are about exactly that kind of work.

And whether or not a student reaches Belfast, practising under a clock without a search engine is the rarest and most useful habit we teach. Most young programmers have never once worked without one.

Getting ready

Four rungs to a live final

Each rung is something a student can do without help, which is the only thing a live challenge can see.

From working with help to working alone
StageRungThe sign it is secure
Years 8 to 101. Fluent basicsWrites input, loops and conditions without looking anything up
Years 10 to 112. Unaided debuggingFinds and fixes an error without asking or searching
Years 11 to 133. Under a clockProduces a working partial answer inside the first quarter of the time
Years 12 to 144. Under observationDoes all of the above with somebody watching

If September is close

The assessment that selects finalists is in late September, so an entry has to be decided in the summer term rather than the autumn.

Practise one ninety-minute sitting a week with no internet. Nothing else prepares for a live final.

Whatever happens in November

Working without a search engine is a skill almost no young programmer has, and it is the one employers notice first.

The rest of the season is on the competitions calendar, including several open across all four nations.

The full list

Courses for a Northern Ireland finalist

Grouped by which final a student is heading for, with the syllabus behind each card.

I

The coding final

Working unaided

SYI / A / 01

Python from start to finish

Fluency, so nothing has to be looked up.

Open the syllabus

SYI / A / 02

Competitive programming

Correct code against a clock.

Open the syllabus

SYI / A / 03

Algorithms and data structures

Picking a method that will finish in time.

Open the syllabus
II

The maths final

Ninety live minutes

SYI / B / 01

Olympiad and competition maths

Unfamiliar problems, worked to an answer.

Open the syllabus

SYI / B / 02

High school mathematics

Technique that should never slow the thinking.

Open the syllabus

SYI / B / 03

Statistics and probability

Careful counting under time pressure.

Open the syllabus
III

The project titles

Scientist and engineer

SYI / C / 01

Data science with Python

Evidence a poster can actually carry.

Open the syllabus

SYI / C / 02

AI and machine learning for teens

A trained model, honestly reported.

Open the syllabus

SYI / C / 03

Full stack web development

Building something people can try.

Open the syllabus
IV

Younger students

Before Year 11

SYI / D / 01

Python and AI for kids

The first typed language, taught patiently.

Open the syllabus

SYI / D / 03

Maths through coding

Programs that show why a method works.

Open the syllabus

How lessons run

Weekly practice, sometimes with a clock on the table

Lessons are live on video from India, five and a half hours ahead of the UK in winter and four and a half in summer, at a time agreed and kept in UK time.

Weekday evening

The usual slot for Years 11 to 14.

Weekend morning

Long enough for a full ninety-minute sitting.

September weeks

For the run-up to the selection assessment.

Timed sittings

We run ninety-minute practices with nothing to look up, because that is the round.

Unaided debugging

A student finds their own error while a teacher watches and says nothing, which is uncomfortable and works.

Five to ten students

Enough for two approaches to meet, small enough for every program to be read.

Northern Ireland years used

Year 12 and Year 14 mean what they mean in Belfast, not what they mean in Birmingham.

One to one when useful

For a finalist in the weeks before November.

No role in the competition

We do not enter students, and we have no relationship with Sentinus.

Student work

What our students have built

Four pieces of finished, published work by students here, made for their own reasons. More of them sit on the student labs page.

NutriLife AI nutrition coach project screenshot

AI and ML

NutriLife

An AI nutrition coach that reads what you eat and works you toward a target.

by Bhavya · Open it

Misti AI chatbot for maths and coding screenshot

AI and ML

Misti

A chatbot that answers mathematics and programming questions, built and deployed by a student.

by Harshit · Open it

GuardianX AI internet safety assistant screenshot

AI and ML

GuardianX

An assistant that helps a young person recognise unsafe situations online.

by Vivaan · Open it

SkyCast weather forecast application screenshot

Web app

SkyCast

A weather forecasting site with live conditions for any location.

by Krish

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Group batch

USD 100

a month, billed in US dollars

  • Five to ten students at one level
  • The same teacher weekly
  • Work read closely
  • A certificate at the end
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One to one

USD 150

a month, billed in US dollars

  • A teacher working with one student
  • Shaped around the final they are sitting
  • Useful in the weeks before November
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Sentinus Young Innovators questions

What Northern Ireland families ask

What is Sentinus Young Innovators?

Northern Ireland's STEM competition, choosing a Young Scientist, Young Engineer, Young Mathematician and Young Coder of the Year, with an overall Sentinus Young Innovator above them.

Who can enter?

The organiser says applications must be aged under 19 on 1 July 2027. That works out as born after 1 July 2008.

Does the age rule match school years?

In Northern Ireland, almost exactly. The compulsory school age cut-off there is 2 July, so an NI school year runs 2 July to 1 July and the eligibility window falls on the boundary. A pupil born 30 June 2008 is too old and one born 2 July 2008 is eligible, and they are a school year apart.

How does a coder qualify for the final?

Through an assessment in late September 2026 that selects the finalists. Scientists and engineers instead submit a poster, by 29 and 30 September 2026 respectively.

Can students enter as a team?

In the scientist and engineer categories, yes: individuals or teams of up to three people. The mathematics and coding categories are individual.

What happens at the final?

It is on Thursday 26 November 2026 at Ulster University, Belfast. Mathematics finalists face a 90-minute live maths challenge and coders a 90-minute coding challenge, judged by a panel of industry experts.

What does the winner get?

The overall Sentinus Young Innovator receives a funded trip to the International Science and Engineering Fair 2027 in the USA. Category winners receive a cash prize, which the organiser publishes in pounds and we do not print.

How should a student prepare for a live coding round?

By sitting ninety minutes a week with a clock and no internet, and by aiming to have something running in the first fifteen minutes. A working partial answer beats an unfinished elegant one.

Is it only for Northern Ireland students?

Sentinus is a Northern Ireland organisation and the competition and its final are run there. Check the organiser for anything outside that.

Do you enter students or coach them for the final?

We teach coding and mathematics in live online classes, including timed practice. We do not enter anyone and have no relationship with Sentinus.

Related pages

More for students in Northern Ireland

The UK-wide contests open to the same students, and where the whole year is set out.

Coding classes in the UK

Four school systems, and what one birthday does under each.

British Informatics Olympiad

Sat in school in December and January.

UK competitions calendar 2026-27

The season in one table, with each organiser named.

British Mathematical Olympiad

Three and a half hours, and marked by hand.

Big Bang Competition

Project entries from teams of any size.

Choosing an online class

How to tell a serious provider from a well-designed one.

Start here

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