Born in Łódź, Łódź Voivodeship, Krysiak trained at the academy of UKS SMS Łódź from 2004 until 31 August 2006 when he joined English Championship club Birmingham City on a three-year contract for a fee of £60,000.[2][4][5] After only two hours on trial at Birmingham, goalkeeping coach Nigel Spink knew that "he was the real deal".[6]Academy director Terry Westley described him as "a strong character [who] really stands out as a massive presence in goal" and believes that Krysiak can reach the top as "he has that Premiership mentality and quality".[7]
He spent the second half of the 2007–08 season on loan at Scottish Premier League club Gretna.[8] He made his debut on 16 February 2008 after Greg Fleming was suspended.[9] Due to the good form of Fleming, Krysiak started in only three matches; on his third appearance he was named in Setanta Sports' SPL Team of the Week.[10] He made one further appearance, impressing after coming on as a substitute against Hearts on 13 May 2008.[11]
At the start of the 2008–09 season, Krysiak joined York City of the Conference Premier on loan for a month, as cover for injured goalkeeper Michael Ingham.[12] He made his debut in a 1–0 victory against Crawley Town and was substituted during his second appearance against Wrexham after suffering a dislocated finger, which resulted in him returning to Birmingham.[13][14][15]
After Birmingham's second-choice goalkeeper Colin Doyle underwent a knee operation, Krysiak replaced him on the substitutes' bench for the Championship match against Doncaster Rovers in September 2008.[16][17] He joined fellow Championship team Swansea City on a three-month emergency loan on 23 September,[18] and on the same day featured on the bench in a 1–0 victory over rivals Cardiff City in the League Cup.[19] He made his debut for Swansea in a 3–0 win over Southampton in the Championship, in which he played the full 90 minutes.[20] Krysiak was named in the Championship team of the week after making his debut for Swansea.[21] He returned to Birmingham following the conclusion of this loan spell.[22]
On 2 January 2009 Krysiak joined Scottish Premier League club Motherwell on loan for the remainder of the 2008–09 season.[23] He made one appearance at Motherwell, which came on the final day of the season, in a 2–1 defeat to Kilmarnock.[24]
In May 2009, Birmingham confirmed that Krysiak would be released when his contract expired at the end of the season.[25] However, a few weeks later he signed a one-year contract with an option for a further year with the club.[26]
On 10 August 2009 Krysiak joined Burton Albion, newly promoted to League Two, on loan for a month.[27] He made his debut in a 5–2 victory over Morecambe on 15 August.[28] After he produced "a string of impressive performances", the loan was first extended until 2 January 2010,[29] and then for the rest of the season.[30] In April, he injured his ankle, with recovery time expected to be from six to eight weeks.[31]
In April 2010, Burton offered Krysiak a permanent contract,[32] while Birmingham announced that he would be released when his contract expired at the end of June 2010.[33]
Krysiak agreed to sign for League One club Exeter City when his Birmingham contract expired on 1 July.[34][35]
Krysiak made his Exeter league debut against Brighton in November 2010. On 7 May 2014, Krysiak announced on Exeweb (fans forum) that he would be leaving the club.
Krysiak joined newly relegated League One side Yeovil Town on a two-year contract on 30 June 2014.[36] He was released by Yeovil at the end of the 2017–18 season.[37]