Tom Peters | Software Developer & Product Manager

Go

My primary language for building reliable, performant backend services and APIs.

SqMGR is a site for managing football squares.
Monday Night Poker is an online poker site for dealer's choice style games with friends.
Sibyl is an application for agile scrum planning sessions.
argon2id is an open-source library for secure password hashing.
pwned checks passwords against the haveibeenpwned database.

func (l *RateLimiter) Limit(next http.Handler) http.Handler {
  return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    ip := getIP(r)
    limiter := l.getVisitor(ip)

    if !limiter.Allow() {
      http.Error(w, http.StatusText(http.StatusTooManyRequests),
        http.StatusTooManyRequests)
      return
    }

    next.ServeHTTP(w, r)
  })
}

JavaScript

Building beautiful, mobile-friendly front-ends with Vue, React, and vanilla JS.

SqMGR is a single-page application built with Vue for managing football squares.
Tournament of Champions features a Go backend with vanilla JS frontend.
This site was built with vanilla JS and Vite.

send(action, subject, cards, additionalData) {
  const context = uuid()
  this.ws.send(JSON.stringify({
    action, subject, cards, additionalData, context,
  }))

  return new Promise((resolve, reject) => {
    const timeout = setTimeout(() => {
      reject('did not receive response from server')
      delete(this.context[context])
    }, 2000)

    this.context[context] = { resolve, reject, timeout }
  })
}

Swift

Two apps on the App Store, kept current with Apple's best practices.

Names in a Hat is a randomized name drawing app I've maintained since 2009.
Teddy Draw is a toddler-friendly drawing app with no ads or complicated UI.

// Draw all names ahead of time to avoid the scenario
// where the last two names are the same person
func drawForSecretSanta() {
  outerLoop: while true {
    resetDraw()
    var secretSantaResults = [DrawingResult]()
    for name in hat.names {
      while true {
        guard let result = super.draw() else {
          fatalError("could not call draw()")
        }
        if name != result.name {
          result.giverName = name
          secretSantaResults.append(result)
          break
        }
        if super.isComplete() { continue outerLoop }
        guard super.undoDraw() else {
          fatalError("could not undoDraw()")
        }
      }
    }
    // ...

Perl

Over 15 years of experience writing highly performant, modern Perl.

Built RESTful APIs serving billions of requests per month using Apache Solr and Cassandra.
Built an ETL system for ingesting movies, TV shows, and news from thousands of sources.
Open sourced Test::MockPackages for unit test development.

sub called {
  my ( $self, $called ) = @ARG;

  if ( !looks_like_number( $called ) || $called < -1 ) {
    croak( '$called must be an integer >= -1' );
  }

  $self->{_called} = $called;

  return $self->_validate();
}

Databases

PostgreSQL is my go-to RDBMS, with experience in MySQL/MariaDB, Solr, Riak, and Cassandra.

CREATE FUNCTION adjust_balance(
  _players_tables_id bigint, _current_balance int,
  _adjustment int, _game_id bigint, _reason text
) RETURNS boolean LANGUAGE plpgsql AS $$
DECLARE
  _previous_balance int;
  _next_balance int;
BEGIN
  SELECT INTO _previous_balance balance
    FROM players_tables WHERE id = _players_tables_id FOR UPDATE;

  IF _previous_balance != _current_balance THEN
    RAISE EXCEPTION 'balance has changed';
  END IF;

  _next_balance := _previous_balance + _adjustment;
  INSERT INTO players_tables_transactions (...) VALUES (...);
  UPDATE players_tables SET balance = _next_balance WHERE id = _players_tables_id;
  RETURN TRUE;
END; $$;

Kubernetes

Docker and Kubernetes advocate. Using GitHub Actions for CI/CD pipelines.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sqmgr-api
spec:
  template:
    spec:
      containers:
        - name: sqmgr
          image: ghcr.io/sqmgr/sqmgr-api:latest
          args: ['-migrate']
          envFrom:
            - secretRef:
                name: sqmgr-config
          volumeMounts:
            - mountPath: /opt/sqmgr/jwt-keys
              name: jwt-keys
          readinessProbe:
            httpGet:
              port: 8000
              path: /
      volumes:
        - name: jwt-keys
          secret:
            secretName: sqmgr-jwt-keys